SmartRock2™ | Temperature/Maturity Sensor

Giatec SmartRock2™ is a rugged waterproof wireless sensor/logger for monitoring the temperature of concrete from fresh stage to hardened stage. The SmartRock2™ can be placed in the concrete formwork (installed on the rebar) before pouring to monitor the temperature of concrete in situ. The continuous measurements are recorded on the SmartRock2™ memory and can be downloaded any time during the concrete setting and hardening onsite using the mobile application on smartphone/tablet.

The continuous monitoring of concrete temperature can be used as a QC/QA method as well as maturity-based strength estimation of concrete. The field monitoring of concrete temperature and strength using this wireless maturity meter can also help with optimizing the formwork removal time, application of load on the structure, adjusting the curing temperature of concrete onsite, as well as opening traffic on concrete pavement.

The new SmartRock2™ app has many enhanced features such as project management, and full PDF report generation.

  • Sample PDF report from the SmartRock2™ app
  • SmartRock2™ iOS mobile app
  • SmartRock2™ Android mobile app
  • Break Test vs. Maturity Method | Pros and Cons

  • Case Studies (A list of projects where SmartRock was used to monitor the temperature and strength of concrete)
    Customer Testimonials (See what industry leaders say about SmartRock)
    SmartRock2™ wireless concrete temperature sensor Real-Time Temperature/Strength Monitoring Mobile app for project management and data analysis SmartRock wireless concrete temperature sensor, tutorial video Manage projects and assign concrete sensors to sections Easily collaborate and share project data Set target values for concrete temperature and strength
    SmartRock™ can be used to monitor the temperature of fresh and hardened concrete. This can provide information on:
    • Hardening of concrete
    • Optimization of curing conditions
    • Heating and cooling processes
    • Quality control in the field
    • Concrete maturity
    • Estimation of strength (ASTM C1074)
    • Concrete mix design optimization
    • Wireless Bluetooth technology
    • Ruggedized and waterproof design
    • Real-time data (e.g. temperature, strength, maturity, max-min temperature) display
    • Full PDF report generation
    • Continuous measurement and recording of temperature
    • Easy activation through tying the wires together (this can be used onsite to hold the sensor around rebar)
    • Extended temperature sensor for deep elements and mass concrete
    • Maturity calibration curve database
    • Long battery life (about 4 months in room temperature)
    • Operation software (Android and iOS apps) for smartphone and tablet
    • Easy data sharing
    • Extended cable for temperature measurement, within 45 cm (18") from the concrete surface
    • Measurement and calculation in both metric and imperial units
    • Patents pending
    The temperature measurement and the estimation of concrete strength based on the maturity method are described in the following ASTM standard specifications:
    • ASTM C1064, "Standard Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete"
    • ASTM C1074, "Standard Practice for Estimating Concrete Strength by the Maturity Method"
    • ASTM C918, "Standard Test Method for Measuring Early-Age Compressive Strength and Projecting Later-Age Strength"
    Reading Range Resolution Wireless Range Measurement Interval
    -30 to +80 °C (-22 to +176 °F) ±0.5 °C 6-8 meters in concrete* (20-26 feet) According to ASTM C1074: First 48 hours: every 30 minutes. After that: every 1 hour
    *The recommended depth for embedding the transmitter part of the sensor in concrete is 5 cm (2 inches). Within this depth, the user can communicate easily with the sensor at a distance of about 8 meters. The temperature sensor extension cable [40 cm (16") long] can then be placed anywhere within the concrete element.
    Type Value
    Operating temperature -30 to +80 °C (-22 to +176 °F)
    Dimensions of SmartRock™ unit 38 x 38 x 12 mm (1.5 x 1.5 x 0.5 inches)
    Length of SmartRock™ temperature cable 40 cm (16")
    Weight 30 gr
    Part No. Item Description
    900112 SmartRock2™ sensor SmartRock2™ sensor with 16-inch (40-cm temperature cable), Free iOS and Android application for Smartphone and Tablet, Quick user guide.
    900114 SmartRock2™-L long-cable sensor SmartRock2™-L sensor with 10-feet (3-meter temperature cable), Free iOS and Android application for Smartphone and Tablet, Quick user guide.
    700039 SmartRock™ APP iOS and Android software license
    Q1: How long is the battery life? A: The battery life is about 4 months for data logging under room temperature.
    Q2: What is the log interval for temperature? A: The standard log follows this schedule: a. First 48 hours: every 30 minutes b. After that: every 1 hour
    Q3: What is the maximum number of data that can be recorded on the SmartRock? A: The device can store 800 data points in the following format: Time | Date | Temp (C) 10:20 | 10/02/2015 | 23
    Q4: Do MTO and DOTs allow this method of concrete strength measurement? A: 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: In-place strength 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.
    Q5: Can the SmartRock app be installed on BlackBerry devices? A: We don't have the official app for BlackBerry systems. But, there are unofficial ways to install the Android apps on BlackBerry. You may read more here
    1. Saul, A. G. A., “Principles Underlying the Steam Curing of Concrete at Atmospheric Pressure,” Magazine of Concrete Research, Vol 2, No. 6, March 1951, pp. 127–140.
    2. Malhotra, V. M., “Maturity Concept and the Estimation of Concrete Strength,” Information Circular IC 277, Dept. of Energy Mines Resources (Canada), Mines Branch, Nov. 1971, 43 pp.
    3. Carino, N. J., “The Maturity Method,” Chapter 5 in Handbook on Nondestructive Testing of Concrete, Malhotra, V. M. and Carino, N. J., Eds., CRC Press Inc., Boca Raton, FL, 1991, pp. 101–146.
    4. Freiesleben Hansen, P., and Pederson, J., “Maturity Computer for Controlled Curing and Hardening of Concrete,” Nordisk Betong, 1, 1977, pp. 19–34.
    5. Carino, N. J., “The Maturity Method: Theory and Application,” ASTM Journal of Cement, Concrete, and Aggregates, Vol 6, No. 2, Winter 1984, pp. 61–73.
    6. Tank, R. C., and Carino, N. J., “Rate Constant Functions for Strength Development of Concrete,” ACI Materials Journal, Vol 88, No. 1, Jan.–Feb. 1991, pp. 74–83.
    7. Carino, N. J., and Tank, R. C., “Maturity Functions for Concrete Made with Various Cements and Admixtures,” ACI Materials Journal, Vol 89, No. 2, March–April 1992, pp. 188–196.
    8. Knudsen, T., “On Particle Size Distribution in Cement Hydration,” Proceedings, 7th International Congress on the Chemistry of Cement (Paris, 1980), Editions Septima, Vol II, I-170–175.
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     2 reviews
    by Walter H. Flood on SmartRock2
    Company: Flood Testing Labs

    Monitoring of the real time strength using SmartRocks has allowed us to advise airport personnel when to open a runway for use on critical 56 hour closure. Their ability to remain below the top slab elevation allows workmen to place and finish the concrete without disturbing the sensors. The software has been excellent in strength estimation.

    by Eric Gauthier on SmartRock2
    Easy-to-use sensor
    Company: Bellai Construction

    It is very easy to work with the SmartRock sensor. It is simple to install. The mobile app makes it convenient to see the live strength value