Many aspects of concrete construction require we monitor temperatures so we can meet specifications. Some examples of specifications, in the USA, which require temperature measurements are: 1) Subgrade temperatures must be above freezing prior to concrete placement, 2) Steel reinforcement and steel forms must be less than 120F (50 °C) prior to concrete placement, 3) Concrete temperatures should be maintained between 40- 90F (4-32 °C) during placement, and 4) monitoring the curing procedures of cold weather concrete is necessary during the first 3-7 days after placement. The authors have found that the quickest and easiest way to estimate temperatures have been to use Infrared Thermometers (IR thermometers).
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