Frequently Asked Questions

What is the difference in installation method between SmartRock 2 and SmartRock 3?

The SmartRock 3 has three main physical components, the white cable, the sensor body, and a rubber installation strap. The activation and installation procedure was enhanced from 2 metal wires that were twisted around the rebar in the SmartRock 2 generation, to a rubber strap meant to tightly install and secure the sensor. The installation strap was specially designed to install the sensors on different sizes and types of rebar. It can also withstand 40 lbs of force.

What are the electrical enhancements between SmartRock 2 and SmartRock 3?

  • The SmartRock 2 sensor was activated by twisting the two metal wires together. However, in the SmartRock 3, the sensor is activated by pulling the white cable out of the sensor transmitter (sensor body).  
  • The SmartRock 3 sensor can now be tagged much more rapidly and easily using the QR code located on the top of the sensor and the SmartRock app.
  • With the SmartRock 3, temperature can be measured at two locations: at the tip of the white cable and in the transmitter, with a measuring range of -22˚F (-32˚C) to 181˚F (85˚C).
  • The green LED light on the SmartRock 3 body blinks 3 times whenever the sensor is activated, providing the end user a visual an indication that the sensor is fully functional and ready to be used.
  • The SmartRock 3 has an increased wireless signal range of up to 40 ft (12 m) when installed in concrete.

How deep should the sensor be installed?

The sensor transmitter must be installed no more than 2 inches (5 cm) from the concrete surface. This is to enable strong wireless signal strength for continued connectivity to the sensor, even long after it has been installed in concrete.

What range of wireless connection should I expect with the sensor?

When the sensor is installed inside concrete as recommended, it can transmit up to 40 ft (12 m). When the black transmitter is exposed, the range of the wireless signal can be up to 100 ft (30 m).

Can I get SmartRock with longer thermocouple cables? 

Yes. Please ask for customized length options when you are ordering your SmartRock package. 

What is the QR code on the SmartRock meant for?

The QR code on the SmartRock 3 sensor is a feature for tagging sensors on the mobile application. The application will guide you through adding new sensors to your projects. To do so, the application will prompt you to scan the QR code on the sensor.

What does ‘dual temperature’ imply?

The design of the SmartRock 3 sensor enables measuring temperature values at two locations simultaneously, one at the temperature probe (tip of the white cable) and one in the body of the sensor (black transmitter). The result can be visualized on the mobile application or the Giatec 360 web platform, where the measurements are differentiated through the “Cable” and “Body” designation.

How can I differentiate between temperature values of the cable and body?

The design of the SmartRock 3 sensor enables measuring temperature at the tip of the white cable (temperature probe) and on the body of the sensor (the black transmitter). On the sensor page of the SmartRock application or the Giatec 360 platform, users can toggle between the two temperature values identified as “cable” and “body” at the top of the page. The temperature graph will display both temperature profiles and will highlight the difference between the measurement points.

How do I know that the SmartRock 3 sensor is activated?

Anytime the temperature probe (the white cable) is removed from the sensor, this activates the sensor. The LED light located on top of the sensor body will blink 3 times to indicate that the sensor was properly activated and is ready to be used.

Can I turn the sensor on and off?

Yes. The sensors can be turned off to preserve battery and memory until the start of the pour, this is done by inserting the temperature probe back into the sensor body.

What is the battery and memory life of the sensor?

The sensor takes a measurement every 15 minutes, allowing it to collect data for 2 months. However, the battery life extends for up to 4 months. This enables the user to retrieve the data for an extra 2 months once the memory is full.

Up to what depth can I measure concrete’s temperature and strength?

The SmartRock 3 is available in two different lengths; the shorter cable has a length of 12 in (30 cm), while the longer cable can measure concrete temperature up to 10 ft (3 m) inside your concrete structure. Contact our team if you are not sure what sensor would be the best suited for your application.

How long is the battery life? 

The battery life is about 4 months under room temperature. 

Do MTO and DOTs allow this method of concrete strength measurement? 

The strength estimation according to the concrete maturity method as described in the ASTM C1074 has been specified by many DOTs in the US as well as the CSA. Here is the clause from CSA: 

“4.4.6.4.5 In-place strength 
4.4.6.4.5.1 Test procedures 
Unless otherwise specified by the owner, the in-place strength shall be determined in accordance with CSA A23.2-14C, CSA A23.2-15C or ASTM C1074 for the purposes of determining: 
(a) when forms shall be removed or when prestressing or post-tensioning shall be applied; (b) when curing shall be terminated; and (c) when re-shores shall be removed.” 

What is the maximum depth I can place the SmartRock? 

We recommend a maximum depth of 2 in (5 cm) to ensure that the signals from the sensor are strong enough. The signal strength weakens as you place the sensor deeper. 

Can I get SmartRock with longer thermocouple cables? 

Yes. Please ask for customized length when you are ordering your SmartRock package. You can get this cable as long as 10 ft. 

How does Giatec 360 work?

Every time you collect your sensor data or edit and create new information on your projects from your phone all the information gets pushed to an online platform. Giatec 360 is the web-based platform used to access your project. Giatec 360 also provides users control capabilities and additional online features.

How do I sign up for Giatec 360?

To gain access to Giatec 360 an account needs to be created for your company.  You can request a company account via your phone application or by contacting Giatec’s technical support. Once the account for the company has been created you will receive an invitation from the administrator to join the company’s account or specific projects.

What is Giatec 360 premium?

There are two subscription plans available for Giatec 360. Once your company account is created, you will automatically have access to the Basic (free) Plan. Depending on your project specifications you might have some additional requirements or further analysis to do using the sensors. The Premium Plan will allow you to gain access to multiple additional features including, but not limited to, differential analysis, artificial intelligence, additional maturity calibration features, additional reporting and more.

How long does the battery last?

The SmartHub is a battery powered device. Under normal temperature conditions, the battery will last up to roughly 10 days.  The user can remotely monitor the level of the battery, the status (charging, discharging) and the location of the device through the Giatec 360 dashboard.

What is the readings frequency of the SmartHub? 

The SmartHub makes a full scan of all sensors within wireless range every 15 minutes and uploads the new sensor information to the Giatec 360 cloud.

Is the SmartHub compatible in my region?

The hub communicates with the cloud through LTE or Wi-Fi connection. Please contact the Giatec Support Team, if you need help setting up your SmartHub for continuous measurements.

How does the SmartHub know which sensors to collect data from?

By logging on to the SmartHub with your Giatec 360 credentials, the SmartHub will know exactly which sensors to collect data from. It is not necessary to pair the sensors with the hub prior to the pour.

How do I become a SmartRock Plus ready-mix partner?

All you have to do is fill out our “get in touch” form on the SmartRock Plus product page and our team will contact you as soon as possible to discuss this value-added program with you.

What are the benefits of using pre-calibrated SmartRock Plus mixes?

With SmartRock Plus you will be able to pre-calibrate a variety of mixes for contractors. This will help you identify a mix that fits a project’s specific performance requirements–whether it is paving, post-tensioned decks, structural columns, or industrial elements. Not only that, but you will be able to continually improve your Smart™ mixes and optimize them to speed up the curing process.

How long is the battery life?

The battery life is up to 2 months under room temperature. 

Is BlueRock compatible with ASTM F2170?

No, the BlueRock is not a standardized method. If you want to learn more about the difference between the standardized method and the embedded BlueRock sensor to measure relative humidity of your concrete please contact Giatec technical support team they will gladly walk you throw the difference between the two measurement methods.

How long is the battery life?

The battery life on a single charge is about 3 months for basic data log under room temperature.

What is the log interval for resistance and temperature?

The standard log follows this schedule:
First 24 hours: every 5 minutes
Next 72 hours: every 1 hour
After that: every 6 hours
We also have custom log which provides a fix log interval in minutes (1 min to a couple of days). This can be changed by the user in the app menu.

What is the maximum number of data that can be recorded on the SmartBox?

The device can store 1024 data points in the following format:
Time | Date | Temp (C) | Resistance (ohm)
10:20 | 10/02/2020 | 23 | 789

What is the battery life of the device?

The iCOR battery will last a full day of use, simply make sure it is fully charged the night before. The unit roughly takes 4 hours to charge. The tablet will indicate the level of battery life on the unit at all times.  We also recommend having the tablet charged the night before, the tablet will have the limiting battery life in the package (similar to a phone). In addition, it is possible to utilize an external battery pack that can be used to mitigate the battery consumption of the tablet.

What are the limitations of the device?

In general, any feature in the reinforced concrete structure that breaks electrical continuity at the point of measurement will not permit testing, i.e. epoxy coated/galvanized rebar, tensioning ducts sheathing (plastic), asphalt wearing surfaces/waterproofing, fiber reinforced concrete. This is not a limitation of the iCOR but applies to all corrosion detection devices.

Some other aspects of the analyzed structure might affect the readings, such as the presence of voids/ large cracks. As a rule, any nonconductive layer or air layer will block the current from reaching the reinforcement. Another limitation that you may encounter in your region is the temperature measurement range. There is no corrosion activity in the sub 0°C (32°F) temperature as the water inside the concrete becomes ice, it drastically changes the concrete resistivity behavior which would impact the results. Those are not limitations of our equipment but limitations of corrosion rate measurement in general.

What is the minimum and maximum cover depth for inspection?

A minimum of 10 mm is recommended as the minimum cover depth for inspection. 90 mm is the maximum rebar cover allowable for the iCOR to perform an accurate measurement. Moreover, the equipment will always read the first rebar layer, so if the intent is to read the rebars that are on other layers, the current will be drawn toward the first rebar layer only. When using the corrosion potential, the greater the cover depth, the lower that reading signal gets. Using the half-cell potential on cover depths >90 mm, the interpretation of the results must be carefully made as small differences can represent local corrosion.

Should corrosion rate measurements be performed if the rebar has corroded severely and the diameter has decreased drastically?

In that situation, the concrete itself would demonstrate significant signs of corrosion. If the corrosion process is severe enough to reduce drastically the rebar diameter, its expansion will deteriorate the concrete, and mapped cracks and delamination will appear on the concrete surface. The primary goal of the equipment is to identify corroding rebars that did not yet severely damage the concrete and take actions to prevent further deterioration.

Are there any recommendations to perform corrosion rate and corrosion potential measurements at the same time?

If it is decided to make a 3 in 1 measurement with the iCOR, when pressing the measurement button, first a half-cell measurement will be taken, followed by both the electrical resistivity and corrosion rate simultaneously. The corrosion rate and electrical resistivity measurement will polarize the reinforcement therefore the half-cell measurement needs to be performed first at a specific location. The iCOR only polarizes the rebar for a short period of time, when the measurements are set to 3, 6 or 10 seconds, however it is always recommended to wait at least 30 minutes before repeating a measurement at the exact same location.

How should the surface of the concrete be prepared before a corrosion rate measurement?

It is highly recommended to pre-wet the surface of the concrete before the measurement is taken as described in ASTM C876. The ideal condition to perform a test is in a saturated surface dry (SSD) condition. This is, however, sometimes hard to achieve on site. Ponding the surface before the test is a very good preparation step. If ponding is used, make sure the excess water on the surface dries or gets removed before the test as excess running water between the surface of the concrete and the iCOR electrodes will cause errors in the measurements.

What is the minimal spacing between the rebars?

There is a limitation to the spacing of the rebar, which is related to the two voltage response electrodes located at the center of the device. If there are two sections of rebar passing through these electrodes, the results will not output correctly. So, the limitation spacing is around 10 cm or 4 in.

For rebars near the edge of the concrete element, are there any limitations?

As long as the 4 electrodes in the measurement direction make contact with the concrete surface on top of the reinforcement, it will be possible to perform a measurement. For example, in the y-direction (handle direction) the current is passed through the outer two electrodes, and the voltage response is measured by the inner electrodes. This statement also applies to the curve surfaces (e.g : columns).

What is the benefit of taking half-cell and corrosion rate measurements together?

With the iCOR, it is possible to perform different types of measurements together or independently (refer to user manual for more information). The five types of measurements are:

1 – Corrosion rate (includes concrete resistivity)

2 – Corrosion rate (includes concrete resistivity) and half-cell potential

3 – Half-cell potential

4 – Concrete resistivity

5 – Half Cell potential and concrete resistivity

Half-cell is included in the unit because it is the only standardized corrosion method. It provides a qualitative measurement while the corrosion rate provides a quantitative assessment. The user tends to use both measurements in the earlier test and move away from half-cell because the results obtained from corrosion rate can be correlated. The iCOR is capable of measuring corrosion rate and concrete resistivity without a connection to the reinforcement, but requires one for the half-cell test.

Is it necessary to use a cover meter/rebar locator to identify the rebar location?

Yes, it is necessary to use a rebar detector/ cover meter to localize the rebars before the test. The iCOR must be aligned with the reinforcement. Location of the rebar, cover depth, and size of the reinforcement are all mandatory information that need to be inputted in the iCOR software.

Does the iCOR requires a connection to the reinforcement during the test?

Only when the device is used to measure corrosion potential (HCP). If the device is used for corrosion rate and/or electrical resistivity assessment only, the connection to the reinforcement is not necessary.   

Does the half-cell electrode need to be calibrated?

A verification probe is available upon purchasing any iCOR package. It is recommended to verify the device using the reference electrode before conducting corrosion potential mapping. The half-cell doesn’t require calibration, but must be maintained in good condition in order to pass the verification.  

Can the device develop corrosion mapping for non-flat surfaces?

Yes, corrosion maps can be developed for a non-flat surface, the tablet application creates a grid which represents plan surface. In the case of non-flat testing surfaces, for example a column, the measurements taken on the circumference are represented as a surface. The user creates a grid with desired dimension and spacing and measurements can be taken at any location within that grid.

However, in the presence of a non-plan surface, it is important to ensure that all the four electrodes in the measurement direction selected for electrical resistivity and corrosion rate be in contact with the concrete surface.

How to wet the surface?

The best condition is saturated surface dry (SSD). This condition can be achieved by wetting the surface with a water spray,  water hose, sprinkler, pounding the surface, etc.  Wet the surface as much as possible and let it dry for 15-20 minutes before the measurement is taken, making sure there is no running water on the surface of the concrete.

Can I install the XCell application on another Android tablet device?

Yes. However, the user requires a product key to activate the Android application. The product key is a unique number that is provided with the XCell sensor for the enhanced and comprehensive packages and can only be installed on one device. The activation key is located in the first page of the user manual.  If you want to use a different Android tablet than the one provided by Giatec, the device should have wireless 4.0 BLE connectivity capability.

Does XCell require a connection to the reinforcement during the test?

Yes. The XCell device follows the ASTM C876 standard, in which a hard-wire connection to the steel rebar is required.

What is the required maintenance?

Usual precautions are necessary for the XCell device, such as cleaning after use and preserving the unit’s integrity throughout the tests. Moreover, it is fundamental to always store the unit with the sponges saturated with storage solution provided within the XCell package. By keeping both sponges saturated within the XCell and verification probe, the user ensures that the electrode does not dry out. The XCell is a battery-operated device, it must be fully charged every 6 months if not used on a regular basis.

Does the device need to be calibrated?

A verification kit is available to purchase and automatically comes with the XCell Comprehensive and Enhanced packages. It is recommended to verify the device using this reference electrode before conducting a corrosion mapping project. If the unit doesn’t pass verification, contact the technical support team at Giatec.

Can XCell develop corrosion mapping for non-flat surfaces?

Yes, corrosion maps can be developed for a non-flat surface, the tablet application creates a grid which represents plan surface. In the case of non-flat testing surfaces, for example a column, the measurements taken on the circumference are represented as a surface. The user creates a grid with desired dimensions,spacing and measurements can be taken at any location within that grid.

What type of electrode is used in the XCell probe?

The XCell device utilizes an Ag/AgCl instead of a more common Cu/CuSO4 electrode. However, the XCell data recording app accounts for this difference and presents the results in mV/CSE as per ASTM C876. By using an Ag/AgCl electrode, the XCell can provide more stable results in chloride contaminated environments.

How to wet the surface?

The best condition is saturated surface dry (SSD). This condition can be achieved by wetting the surface with a water spray   water hose, sprinkler, pounding the surface, etc., foras long as possible.  Wet the surface as much as possible and let it dry for 15-20 minutes before taking a measurement, making sure there is no running water on the surface of the concrete.

Measuring half-cell potential in cold weather

When performing measurements in cold weather, the results will show much lower corrosion potential than expected. This is because, in low temperatures, the corrosion process is greatly reduced, and the conductivity of the concrete is very low. In this scenario, it is best to perform the readings when the temperatures are back to above freezing temperatures. 

I lost the computer software; how can I get it back on my computer?

Use the links below to download the software and the driver.

Software: https://www.dropbox.com/sh/4l2h357xwbviuea/AAB5kq8ZeQ0w1Q4Marj06TQ7a?dl=0

Driver: https://www.dropbox.com/sh/dp4wi4q9hl69xig/AADA4xc7Y64MFDmaJoi6x3Yta/RCON2%20CD%20Contents/Software/USB%20Driver?dl=0

Can the Perma device be modified to test Chloride Migration Coefficient according to NTB-492? 

The NTB-492 is a popular test across Europe and other parts of the world. It is a similar test to a combination of ASTM C1202 and ASTM C1556. ASTM C1202 and NTB-492 will both provide the  indication of the quality of your concrete and it’s ability to prevent  chloride penetration. ASTM C1202 is a quicker test and slightly less complicated.

The Perma is  not compliant with the NTB 492 because with this equipment you cannot change the applied voltage used in the test. The device enables you to perform the regular test within 6 hours, but you may not use the other time values presented in Table 1 (page 8) of the NTB 492.

Can we adjust the test time of the device? 

The Perma device is designed to be compliant for the ASTM C1202 and ASTM C1760 which both have fixed test time duration. ASTM C1202 requires for 6 hours of testing and the testing time is not adjustable unless stopped manually at an earlier time.  ASTM C1760 requires a maximum of 60 seconds test duration. 

Do I need to send the device back to Giatec for annual calibration?

Perma is fully calibrated before shipping and, moreover, comes with a verification kit for the customer to verify the test results from time to time or before every test if deemed necessary. Therefore, it is not necessary to send the unit back to Giatec for yearly maintenance. Giatec does have the calibration service available if required.  

How can I clean the cells if there is a large amount of rust?   

The test cells require some maintenance after each use. We recommend using CLR solution or any equivalent product available at local hardware stores to clean the steel mesh plate and connector.

In order to clean the cell, one must: 

  1. Disassemble the test cells, removing all parts.   
  2. Clean the steel mesh plate and connector to remove all the rust. We recommend using CLR solution or any equivalent product.  
  3. Reassemble the cell making sure the connectors are tightened, and the metal head of the connector inside the cell is completely in contact with the wire mesh. If the connectors are loose, signs of corrosion will appear on the edge of the wire mesh, which may cause errors in the measurement.  
  4. You can check the connection between the mesh and the connector using a Voltmeter. 

If the contact is impossible between the connector and the mesh plate because of the large amount of section loss due to corrosion, the mesh plate and the connectors can be purchased separately.

Is it possible to record test data into memory and monitor the recorded data after the test? 

No, this feature is not available in stand-alone operation (device only). However, if controlled through the software on a computer all this information is available to the user.  

Can we utilize 4 channels on a 24-bit analog-digital converter?

No, each channel has one, but it is 16 bit. Based on ASTM C1202, the accuracy requirement 16 bit is more than enough and our unit has the resolution 10 times better than the standard requirement.

Does the RS232 serial port output have the option of transferring the recorded data to the computer?

No, the device utilizes a USB B (printer cable). When controlled via a computer, all the information is saved on the computer and is accessible to the user.

What if my concrete sample is smaller and doesn’t have a 100 mm diameter, how should I proceed to take the test and interpret the results?

ASTM C1202 applies for cylinder specimens that have a nominal diameter ranging from 95 to 100 mm. If the end-user has a sample smaller than 100 mm, he can use epoxy around the rubber gasket. The epoxy should be placed where the gap/space is located. The intention to use epoxy is to seal the test cell from leakage. In addition, as long as all gaps are closed, the test can be performed without any further issues.

If the specimen is not 95 mm in diameter,  the customer must adjust the results based on the diameter of the sample tested according to ASTM C1202 section 11.2.

How do I perform a leakage test?

After filling the cells with the solution (NaOH and NaCl), the user must perform a leakage test.

Control the level of liquids inside each container. If the level of the liquids is not constant within ten minutes, or if any dripping is observed below the cell, there may be a leak between the gasket and the specimen surface or between the test cell and connectors. Any leakage problem should be fixed before starting the test.

If the leakage is between the gasket and the specimen surface, try tightening the bolts and refilling the cell containers. If the source of the leakage is between the cell and connectors, try tightening the connector, if it is possible. Otherwise, use silicon glue to seal the space between the connector and the cell. You may also need to adjust the position of the rubber gaskets and ensure they are properly located within the Plexiglas cell part to fix the leakage problem.

 

Can RCON be used for field tests on hardened concrete, or is it just for laboratory use?

RCON is designed to test hardened concrete samples of different sizes and shapes for both laboratory and field applications. 

Your website mentions the correlation between ASTM C1202 and the RCON. Do you have any data comparing the results of the 2 methods? 

Yes. There is a correlation between the results of the rapid chloride permeability test and those obtained from the electrical resistivity method. 

Does this device measure compressive strength? 

No, it does not. RCON can easily and quickly measure the electrical resistivity of concrete. This parameter is closely correlated with the setting time of fresh concrete and the durability characteristics of hardened concrete. 

Does this device measure the sustainability of concrete and the ingress of salts and chlorides? 

RCON measures the electrical resistivity of concrete. This parameter can be used to estimate the durability and sustainability of concrete in a specific exposure environment. Giatec offers another device called Perma™ which measures the rapid chloride permeability of concrete based on the ASTM C1202. For more information on this device, please click here

How do you measure the change in water content and time of setting in concrete specimen? 

Using the special fresh concrete probe designed to be embedded in concrete, you can measure the water content and the setting time by monitoring the electrical resistivity versus time. The device comes with software that can log the data. However, calibration is required to correlate the change of the electrical resistivity to the actual water content and the setting time of concrete. 

Is the concrete specimen used in this test cylinder or can we use a cube sample size (150 mm x 150 mm x 150 mm)? 

You can fit the cylindrical samples with the maximum size of 150 mm x 300 mm and the cubic sample with the maximum size of 100 mm x 100 mm in the regular sample holder that comes with the RCON. However, if you need to measure a 150 mm x 150 mm cubic sample, we can customize the sample holder fixture in order to accommodate this size. 

How many samples can be tested simultaneously? 

Only one sample can be tested at a time with the current test set-up that we have. However, the test is very fast, taking only 3-5 seconds to accurately process, allowing for many samples to be tested in a short period of time. 

Does the RCON unit required yearly calibration with the manufacturer?

RCON is fully calibrated before shipping and, moreover, comes with a verification kit for the customer to verify the test results from time to time if deemed necessary. Therefore, it is not necessary to send the unit back to Giatec for yearly maintenance. The device has been designed to provide high sensitivity and accuracy required for concrete research. 

How to use RCON for conductivity measurement for fresh concrete? 

The conductivity of fresh concrete (which is the inverse of its electrical resistivity) can be measured using the fresh concrete probe provided by Giatec or using a similar setup. This fixture incorporates two stainless steel rods (with insulating parts at the ends) embedded in fresh concrete. The rods are connected to the RCON device for monitoring the increase in the electrical resistance between them as the concrete sets and hardens. The measured electrical resistance can be converted to electrical resistivity knowing the conversion factor which depends on the geometry of the test container. This conversion factor can be easily obtained by measuring the electrical resistance of a salt solution (with known conductivity) in the test container. 

Is it required to use wet sponges for resistivity measurement using Surf?

If you are testing saturated surface dry specimens (SSD condition), there is no need to use wet sponges. But, for dry specimens, you must use either wet sponges on the connection tips or the conductive gel provided with the device.

How does Surf take measurements faster?

Giatec Surf utilizes a patented technology to automatically measure the surface resistivity 8 times around the cylindrical concrete specimen using its four channels of 4-probe arrays. The PC software then generates the required reports according to the standard specifications.

Can Surf be used for field tests on hardened concrete or is it just for laboratory use?

The current version of Surf has been designed for laboratory applications in the durability-based quality control of concrete. An accessory is under development for Surf that enables this device for field applications as well.

How can I use Surf for other applications?

The four input channels of Surf device can be connected to accessory cables for customization of test-setup for surface resistivity measurement from the surface of concrete elements (e.g. crack detection under load) or be embedded in fresh and hardened concrete for the monitoring of setting and moisture transport, respectively. Giatec’s scientific team will be happy to assist you with your particular research project application.

SmartRock® 3

The SmartRock 3 has three main physical components, the white cable, the sensor body, and a rubber installation strap. The activation and installation procedure was enhanced from 2 metal wires that were twisted around the rebar in the SmartRock 2 generation, to a rubber strap meant to tightly install and secure the sensor. The installation strap was specially designed to install the sensors on different sizes and types of rebar. It can also withstand 40 lbs of force.

  • The SmartRock 2 sensor was activated by twisting the two metal wires together. However, in the SmartRock 3, the sensor is activated by pulling the white cable out of the sensor transmitter (sensor body).  
  • The SmartRock 3 sensor can now be tagged much more rapidly and easily using the QR code located on the top of the sensor and the SmartRock app.
  • With the SmartRock 3, temperature can be measured at two locations: at the tip of the white cable and in the transmitter, with a measuring range of -22˚F (-32˚C) to 181˚F (85˚C).
  • The green LED light on the SmartRock 3 body blinks 3 times whenever the sensor is activated, providing the end user a visual an indication that the sensor is fully functional and ready to be used.
  • The SmartRock 3 has an increased wireless signal range of up to 40 ft (12 m) when installed in concrete.

The sensor transmitter must be installed no more than 2 inches (5 cm) from the concrete surface. This is to enable strong wireless signal strength for continued connectivity to the sensor, even long after it has been installed in concrete.

When the sensor is installed inside concrete as recommended, it can transmit up to 40 ft (12 m). When the black transmitter is exposed, the range of the wireless signal can be up to 100 ft (30 m).

Yes. Please ask for customized length options when you are ordering your SmartRock package. 

The QR code on the SmartRock 3 sensor is a feature for tagging sensors on the mobile application. The application will guide you through adding new sensors to your projects. To do so, the application will prompt you to scan the QR code on the sensor.

The design of the SmartRock 3 sensor enables measuring temperature values at two locations simultaneously, one at the temperature probe (tip of the white cable) and one in the body of the sensor (black transmitter). The result can be visualized on the mobile application or the Giatec 360 web platform, where the measurements are differentiated through the “Cable” and “Body” designation.

The design of the SmartRock 3 sensor enables measuring temperature at the tip of the white cable (temperature probe) and on the body of the sensor (the black transmitter). On the sensor page of the SmartRock application or the Giatec 360 platform, users can toggle between the two temperature values identified as “cable” and “body” at the top of the page. The temperature graph will display both temperature profiles and will highlight the difference between the measurement points.

Anytime the temperature probe (the white cable) is removed from the sensor, this activates the sensor. The LED light located on top of the sensor body will blink 3 times to indicate that the sensor was properly activated and is ready to be used.

Yes. The sensors can be turned off to preserve battery and memory until the start of the pour, this is done by inserting the temperature probe back into the sensor body.

The sensor takes a measurement every 15 minutes, allowing it to collect data for 2 months. However, the battery life extends for up to 4 months. This enables the user to retrieve the data for an extra 2 months once the memory is full.

The SmartRock 3 is available in two different lengths; the shorter cable has a length of 12 in (30 cm), while the longer cable can measure concrete temperature up to 10 ft (3 m) inside your concrete structure. Contact our team if you are not sure what sensor would be the best suited for your application.

SmartRock® 2

The battery life is about 4 months under room temperature. 

The strength estimation according to the concrete maturity method as described in the ASTM C1074 has been specified by many DOTs in the US as well as the CSA. Here is the clause from CSA: 

“4.4.6.4.5 In-place strength 
4.4.6.4.5.1 Test procedures 
Unless otherwise specified by the owner, the in-place strength shall be determined in accordance with CSA A23.2-14C, CSA A23.2-15C or ASTM C1074 for the purposes of determining: 
(a) when forms shall be removed or when prestressing or post-tensioning shall be applied; (b) when curing shall be terminated; and (c) when re-shores shall be removed.” 

We recommend a maximum depth of 2 in (5 cm) to ensure that the signals from the sensor are strong enough. The signal strength weakens as you place the sensor deeper. 

Yes. Please ask for customized length when you are ordering your SmartRock package. You can get this cable as long as 10 ft. 

Giatec 360

Every time you collect your sensor data or edit and create new information on your projects from your phone all the information gets pushed to an online platform. Giatec 360 is the web-based platform used to access your project. Giatec 360 also provides users control capabilities and additional online features.

To gain access to Giatec 360 an account needs to be created for your company.  You can request a company account via your phone application or by contacting Giatec’s technical support. Once the account for the company has been created you will receive an invitation from the administrator to join the company’s account or specific projects.

There are two subscription plans available for Giatec 360. Once your company account is created, you will automatically have access to the Basic (free) Plan. Depending on your project specifications you might have some additional requirements or further analysis to do using the sensors. The Premium Plan will allow you to gain access to multiple additional features including, but not limited to, differential analysis, artificial intelligence, additional maturity calibration features, additional reporting and more.

SmartHub™​

The SmartHub is a battery powered device. Under normal temperature conditions, the battery will last up to roughly 10 days.  The user can remotely monitor the level of the battery, the status (charging, discharging) and the location of the device through the Giatec 360 dashboard.

The SmartHub makes a full scan of all sensors within wireless range every 15 minutes and uploads the new sensor information to the Giatec 360 cloud.

The hub communicates with the cloud through LTE or Wi-Fi connection. Please contact the Giatec Support Team, if you need help setting up your SmartHub for continuous measurements.

By logging on to the SmartHub with your Giatec 360 credentials, the SmartHub will know exactly which sensors to collect data from. It is not necessary to pair the sensors with the hub prior to the pour.

SmartRock® Plus​

All you have to do is fill out our “get in touch” form on the SmartRock Plus product page and our team will contact you as soon as possible to discuss this value-added program with you.

With SmartRock Plus you will be able to pre-calibrate a variety of mixes for contractors. This will help you identify a mix that fits a project’s specific performance requirements–whether it is paving, post-tensioned decks, structural columns, or industrial elements. Not only that, but you will be able to continually improve your Smart™ mixes and optimize them to speed up the curing process

BlueRock

The battery life is up to 2 months under room temperature. 

No, the BlueRock is not a standardized method. If you want to learn more about the difference between the standardized method and the embedded BlueRock sensor to measure relative humidity of your concrete please contact Giatec technical support team they will gladly walk you throw the difference between the two measurement methods.

iCOR®

The iCOR battery will last a full day of use, simply make sure it is fully charged the night before. The unit roughly takes 4 hours to charge. The tablet will indicate the level of battery life on the unit at all times.  We also recommend having the tablet charged the night before, the tablet will have the limiting battery life in the package (similar to a phone). In addition, it is possible to utilize an external battery pack that can be used to mitigate the battery consumption of the tablet.

In general, any feature in the reinforced concrete structure that breaks electrical continuity at the point of measurement will not permit testing, i.e. epoxy coated/galvanized rebar, tensioning ducts sheathing (plastic), asphalt wearing surfaces/waterproofing, fiber reinforced concrete. This is not a limitation of the iCOR but applies to all corrosion detection devices.

Some other aspects of the analyzed structure might affect the readings, such as the presence of voids/ large cracks. As a rule, any nonconductive layer or air layer will block the current from reaching the reinforcement. Another limitation that you may encounter in your region is the temperature measurement range. There is no corrosion activity in the sub 0°C (32°F) temperature as the water inside the concrete becomes ice, it drastically changes the concrete resistivity behavior which would impact the results. Those are not limitations of our equipment but limitations of corrosion rate measurement in general.

A minimum of 10 mm is recommended as the minimum cover depth for inspection. 90 mm is the maximum rebar cover allowable for the iCOR to perform an accurate measurement. Moreover, the equipment will always read the first rebar layer, so if the intent is to read the rebars that are on other layers, the current will be drawn toward the first rebar layer only. When using the corrosion potential, the greater the cover depth, the lower that reading signal gets. Using the half-cell potential on cover depths >90 mm, the interpretation of the results must be carefully made as small differences can represent local corrosion.

In that situation, the concrete itself would demonstrate significant signs of corrosion. If the corrosion process is severe enough to reduce drastically the rebar diameter, its expansion will deteriorate the concrete, and mapped cracks and delamination will appear on the concrete surface. The primary goal of the equipment is to identify corroding rebars that did not yet severely damage the concrete and take actions to prevent further deterioration.

If it is decided to make a 3 in 1 measurement with the iCOR, when pressing the measurement button, first a half-cell measurement will be taken, followed by both the electrical resistivity and corrosion rate simultaneously. The corrosion rate and electrical resistivity measurement will polarize the reinforcement therefore the half-cell measurement needs to be performed first at a specific location. The iCOR only polarizes the rebar for a short period of time, when the measurements are set to 3, 6 or 10 seconds, however it is always recommended to wait at least 30 minutes before repeating a measurement at the exact same location.

It is highly recommended to pre-wet the surface of the concrete before the measurement is taken as described in ASTM C876. The ideal condition to perform a test is in a saturated surface dry (SSD) condition. This is, however, sometimes hard to achieve on site. Ponding the surface before the test is a very good preparation step. If ponding is used, make sure the excess water on the surface dries or gets removed before the test as excess running water between the surface of the concrete and the iCOR electrodes will cause errors in the measurements.

There is a limitation to the spacing of the rebar, which is related to the two voltage response electrodes located at the center of the device. If there are two sections of rebar passing through these electrodes, the results will not output correctly. So, the limitation spacing is around 10 cm or 4 in.

As long as the 4 electrodes in the measurement direction make contact with the concrete surface on top of the reinforcement, it will be possible to perform a measurement. For example, in the y-direction (handle direction) the current is passed through the outer two electrodes, and the voltage response is measured by the inner electrodes. This statement also applies to the curve surfaces (e.g : columns).

With the iCOR, it is possible to perform different types of measurements together or independently (refer to user manual for more information). The five types of measurements are:

1 – Corrosion rate (includes concrete resistivity)

2 – Corrosion rate (includes concrete resistivity) and half-cell potential

3 – Half-cell potential

4 – Concrete resistivity

5 – Half Cell potential and concrete resistivity

Half-cell is included in the unit because it is the only standardized corrosion method. It provides a qualitative measurement while the corrosion rate provides a quantitative assessment. The user tends to use both measurements in the earlier test and move away from half-cell because the results obtained from corrosion rate can be correlated. The iCOR is capable of measuring corrosion rate and concrete resistivity without a connection to the reinforcement, but requires one for the half-cell test.

Yes, it is necessary to use a rebar detector/ cover meter to localize the rebars before the test. The iCOR must be aligned with the reinforcement. Location of the rebar, cover depth, and size of the reinforcement are all mandatory information that need to be inputted in the iCOR software.

Only when the device is used to measure corrosion potential (HCP). If the device is used for corrosion rate and/or electrical resistivity assessment only, the connection to the reinforcement is not necessary. 

A verification probe is available upon purchasing any iCOR package. It is recommended to verify the device using the reference electrode before conducting corrosion potential mapping. The half-cell doesn’t require calibration, but must be maintained in good condition in order to pass the verification. 

Yes, corrosion maps can be developed for a non-flat surface, the tablet application creates a grid which represents plan surface. In the case of non-flat testing surfaces, for example a column, the measurements taken on the circumference are represented as a surface. The user creates a grid with desired dimension and spacing and measurements can be taken at any location within that grid.

However, in the presence of a non-plan surface, it is important to ensure that all the four electrodes in the measurement direction selected for electrical resistivity and corrosion rate be in contact with the concrete surface.

The best condition is saturated surface dry (SSD). This condition can be achieved by wetting the surface with a water spray,  water hose, sprinkler, pounding the surface, etc.  Wet the surface as much as possible and let it dry for 15-20 minutes before the measurement is taken, making sure there is no running water on the surface of the concrete.

XCell

Yes. However, the user requires a product key to activate the Android application. The product key is a unique number that is provided with the XCell sensor for the enhanced and comprehensive packages and can only be installed on one device. The activation key is located in the first page of the user manual.  If you want to use a different Android tablet than the one provided by Giatec, the device should have wireless 4.0 BLE connectivity capability.

Yes. The XCell device follows the ASTM C876 standard, in which a hard-wire connection to the steel rebar is required.

Usual precautions are necessary for the XCell device, such as cleaning after use and preserving the unit’s integrity throughout the tests. Moreover, it is fundamental to always store the unit with the sponges saturated with storage solution provided within the XCell package. By keeping both sponges saturated within the XCell and verification probe, the user ensures that the electrode does not dry out. The XCell is a battery-operated device, it must be fully charged every 6 months if not used on a regular basis.

A verification kit is available to purchase and automatically comes with the XCell Comprehensive and Enhanced packages. It is recommended to verify the device using this reference electrode before conducting a corrosion mapping project. If the unit doesn’t pass verification, contact the technical support team at Giatec.

Yes, corrosion maps can be developed for a non-flat surface, the tablet application creates a grid which represents plan surface. In the case of non-flat testing surfaces, for example a column, the measurements taken on the circumference are represented as a surface. The user creates a grid with desired dimensions,spacing and measurements can be taken at any location within that grid.

The XCell device utilizes an Ag/AgCl instead of a more common Cu/CuSO4 electrode. However, the XCell data recording app accounts for this difference and presents the results in mV/CSE as per ASTM C876. By using an Ag/AgCl electrode, the XCell can provide more stable results in chloride contaminated environments.

The best condition is saturated surface dry (SSD). This condition can be achieved by wetting the surface with a water spray   water hose, sprinkler, pounding the surface, etc., foras long as possible.  Wet the surface as much as possible and let it dry for 15-20 minutes before taking a measurement, making sure there is no running water on the surface of the concrete.

When performing measurements in cold weather, the results will show much lower corrosion potential than expected. This is because, in low temperatures, the corrosion process is greatly reduced, and the conductivity of the concrete is very low. In this scenario, it is best to perform the readings when the temperatures are back to above freezing temperatures. 

Perma

The NTB-492 is a popular test across Europe and other parts of the world. It is a similar test to a combination of ASTM C1202 and ASTM C1556. ASTM C1202 and NTB-492 will both provide the  indication of the quality of your concrete and it’s ability to prevent  chloride penetration. ASTM C1202 is a quicker test and slightly less complicated.

The Perma is  not compliant with the NTB 492 because with this equipment you cannot change the applied voltage used in the test. The device enables you to perform the regular test within 6 hours, but you may not use the other time values presented in Table 1 (page 8) of the NTB 492.

The Perma device is designed to be compliant for the ASTM C1202 and ASTM C1760 which both have fixed test time duration. ASTM C1202 requires for 6 hours of testing and the testing time is not adjustable unless stopped manually at an earlier time.  ASTM C1760 requires a maximum of 60 seconds test duration. 

Perma is fully calibrated before shipping and, moreover, comes with a verification kit for the customer to verify the test results from time to time or before every test if deemed necessary. Therefore, it is not necessary to send the unit back to Giatec for yearly maintenance. Giatec does have the calibration service available if required.  

The test cells require some maintenance after each use. We recommend using CLR solution or any equivalent product available at local hardware stores to clean the steel mesh plate and connector.

In order to clean the cell, one must: 

  1. Disassemble the test cells, removing all parts.   
  2. Clean the steel mesh plate and connector to remove all the rust. We recommend using CLR solution or any equivalent product.  
  3. Reassemble the cell making sure the connectors are tightened, and the metal head of the connector inside the cell is completely in contact with the wire mesh. If the connectors are loose, signs of corrosion will appear on the edge of the wire mesh, which may cause errors in the measurement.  
  4. You can check the connection between the mesh and the connector using a Voltmeter. 

If the contact is impossible between the connector and the mesh plate because of the large amount of section loss due to corrosion, the mesh plate and the connectors can be purchased separately.

No, this feature is not available in stand-alone operation (device only). However, if controlled through the software on a computer all this information is available to the user.  

No, each channel has one, but it is 16 bit. Based on ASTM C1202, the accuracy requirement 16 bit is more than enough and our unit has the resolution 10 times better than the standard requirement.

No, the device utilizes a USB B (printer cable). When controlled via a computer, all the information is saved on the computer and is accessible to the user.

ASTM C1202 applies for cylinder specimens that have a nominal diameter ranging from 95 to 100 mm. If the end-user has a sample smaller than 100 mm, he can use epoxy around the rubber gasket. The epoxy should be placed where the gap/space is located. The intention to use epoxy is to seal the test cell from leakage. In addition, as long as all gaps are closed, the test can be performed without any further issues.

If the specimen is not 95 mm in diameter,  the customer must adjust the results based on the diameter of the sample tested according to ASTM C1202 section 11.2.

How do I perform a leakage test?

After filling the cells with the solution (NaOH and NaCl), the user must perform a leakage test.

Control the level of liquids inside each container. If the level of the liquids is not constant within ten minutes, or if any dripping is observed below the cell, there may be a leak between the gasket and the specimen surface or between the test cell and connectors. Any leakage problem should be fixed before starting the test.

If the leakage is between the gasket and the specimen surface, try tightening the bolts and refilling the cell containers. If the source of the leakage is between the cell and connectors, try tightening the connector, if it is possible. Otherwise, use silicon glue to seal the space between the connector and the cell. You may also need to adjust the position of the rubber gaskets and ensure they are properly located within the Plexiglas cell part to fix the leakage problem.

 

RCON

RCON is designed to test hardened concrete samples of different sizes and shapes for both laboratory and field applications. 

Yes. There is a correlation between the results of the rapid chloride permeability test and those obtained from the electrical resistivity method. 

No, it does not. RCON can easily and quickly measure the electrical resistivity of concrete. This parameter is closely correlated with the setting time of fresh concrete and the durability characteristics of hardened concrete. 

RCON measures the electrical resistivity of concrete. This parameter can be used to estimate the durability and sustainability of concrete in a specific exposure environment. Giatec offers another device called Perma™ which measures the rapid chloride permeability of concrete based on the ASTM C1202. For more information on this device, please click here

Using the special fresh concrete probe designed to be embedded in concrete, you can measure the water content and the setting time by monitoring the electrical resistivity versus time. The device comes with software that can log the data. However, calibration is required to correlate the change of the electrical resistivity to the actual water content and the setting time of concrete. 

You can fit the cylindrical samples with the maximum size of 150 mm x 300 mm and the cubic sample with the maximum size of 100 mm x 100 mm in the regular sample holder that comes with the RCON. However, if you need to measure a 150 mm x 150 mm cubic sample, we can customize the sample holder fixture in order to accommodate this size. 

Only one sample can be tested at a time with the current test set-up that we have. However, the test is very fast, taking only 3-5 seconds to accurately process, allowing for many samples to be tested in a short period of time. 

RCON is fully calibrated before shipping and, moreover, comes with a verification kit for the customer to verify the test results from time to time if deemed necessary. Therefore, it is not necessary to send the unit back to Giatec for yearly maintenance. The device has been designed to provide high sensitivity and accuracy required for concrete research. 

The conductivity of fresh concrete (which is the inverse of its electrical resistivity) can be measured using the fresh concrete probe provided by Giatec or using a similar setup. This fixture incorporates two stainless steel rods (with insulating parts at the ends) embedded in fresh concrete. The rods are connected to the RCON device for monitoring the increase in the electrical resistance between them as the concrete sets and hardens. The measured electrical resistance can be converted to electrical resistivity knowing the conversion factor which depends on the geometry of the test container. This conversion factor can be easily obtained by measuring the electrical resistance of a salt solution (with known conductivity) in the test container. 

Surf

If you are testing saturated surface dry specimens (SSD condition), there is no need to use wet sponges. But, for dry specimens, you must use either wet sponges on the connection tips or the conductive gel provided with the device.

Giatec Surf utilizes a patented technology to automatically measure the surface resistivity 8 times around the cylindrical concrete specimen using its four channels of 4-probe arrays. The PC software then generates the required reports according to the standard specifications.

The current version of Surf has been designed for laboratory applications in the durability-based quality control of concrete. An accessory is under development for Surf that enables this device for field applications as well.

The four input channels of Surf device can be connected to accessory cables for customization of test-setup for surface resistivity measurement from the surface of concrete elements (e.g. crack detection under load) or be embedded in fresh and hardened concrete for the monitoring of setting and moisture transport, respectively. Giatec’s scientific team will be happy to assist you with your particular research project application.

Giatec 360

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