ASTM C1074 – Standard Practice for Estimating Concrete Strength by the Maturity Method
ACI 318 – Building Code Requirements for Structural Concrete and Commentary
| Type | Value |
| Reading Range | -22 to +181 °F (-30 to 85 °C) |
| Measurement Accuracy | ± 1.8 °F (± 1°C) |
| Measurement Resolution | ± 0.18 °F (± 0.1°C) |
| Measurement Frequency | Once every 15 mins (for 2 months of data) |
| Wireless Signal Range | Up to 40 ft (12 m) |
| Temperature Cable Length | 16 in (40 cm) / 10 ft (3 m) |
| Battery Life | Up to 4 months after installation |
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.
| Part No. | Item | Description |
| 900112 | SmartRock®-S Sensor | Wireless concrete temperature/maturity logger with 40cm (10′) temperature sensor |
| 900114 | SmartRock®-L Sensor | Wireless concrete temperature/maturity logger with 3m (10′) temperature sensor |
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