The results of a series of studies conducted to evaluate the drying effect of elevated temperature exposure on the properties of concrete are reported. Specimens made from four concrete mixes of ordinary portland cement and river-run aggregate were tested to learn of the compressive, tensile and bond strengths, moduli of elasticity and weight losses after 90 day exposure to temperatures of 200, 350, 500, 650, 800, 1100, 2000 and 3000 C. Moisture in specimens was allowed to evaporate freely. Strength tests of unheated and heated conretes were conducted at room temperature on both dried and wet specimens presoaked in water for two days. Exposure to sustained elevated temperature higher than 350C showed remarkable deteriorating effects on the physical properties of concrete when moisture in concrete was allowed to evaporate. Greater reductions of strengths and weights after exposure were associated with higher slumps, that is, with larger amount of water, and higher
Kasami, H., Okuno, T., & Yamane, S. (1975). Properties of concrete exposed to sustained elevated temperature. In Structural mechanics in reactor technology (Vol. 8).