Role of Environmental Conditions on the Frost Damage of Concrete

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Influence level of environmental factors gained from laboratory tests were investigated various factors had been taken into consideration, such as the factor concerning to the temperature, the factor concerning to the surrounding water during the freezing, and particulary, the factor concerning to the water content during the early period of freezing. These results were adopted for the estimation of temperature conditions of specimens which had been exposed to outdoors in Sapporo, and relation ship between the exposure term effect and the frost damage in freezing-and-thawing test was calculated. The effect of annually 100 freezing-and-thawing of specimens have been left and exposed to outdoors in Sapporo corresponds to the influence of 19 experimental cycles, supposing we applied to standard test (ASTM c666 A Method).