Accelerating Test of Reinforced Concrete Member for Evaluating Durability*

概要

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The purpose of this study is to examine the following points for evaluating the durability and estimating the deterioration of reinforced structures in cold regions. (1) Developing modeling specimens of RC structure members, whose size is 10×10×40 cm in order to be able to conduct sthe rapid freezethaw tests by ASTM C 666 and loading. (2) The relation between the decrease of strength in the area of concrete subjected to freeze-thaw and the degree of reinforcing steel corrosion, and the decrease of bearing strength of RC concrete members. (3) The quantitative relation between the degree of cover deterioration and reinforcing steel corrosion. (4) A rapid freeze-thaw test was air is done and this method that was compared with freezethaw tests in water by ASTM. The summary of results is as follows. The modeling specimens of RC members were able to be given the accelerating test. The change of weight and ultrasonic velocity of rapid freezethaw tests in air were smaller than that in water. The ultimate strength decreased with the cycle of freeze-thaw.
北見工業大学の論文