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When performing temperature tests, it is important to. use a good, accurate thermometer that is surrounded. by at least three inches of concrete. Take readings. quickly, noting that small samples lose heat fast. Concrete temperatures are affected by the mix-water. temperature, aggregate temperatures, cement type. and admixture type. Optimum concrete temperatures. will aid with setting, early strength development, proper curing and ultimately aid in achieving a higher. quality concrete. Hot concrete sets up rapidly, gaining.
The concrete setting time at various temperatures is given at table below: Table 1 Setting Time of Concrete at Various Temperature. The retardation of initial setting time by the use of admixture is affected by three factors, that is, the ambient temperature, the dosage used, and the time of adding to the batch.