An Experimental Study on Freezing and Thawing Resistance of Rice Straw Ash Concrete

볏짚재 콘크리트의 동결융해 저항성에 관한 실험적 연구

This experiment was on purpose to estimate freezing and thawing resistance concering with developing rice straw ash concrete which were mixed rice straw ash to cement as ratio of cement weight. Freezing and thawing test was done by Method A of KS F 2456. It could estimate change of original mass, pulse velocity and dynamic modulus of elasticity during test. Test results showed that 5% filled rice straw ash concrete had the highest durability factor(DF) as 86 and from 5% to 7.5% filled rice straw ash concrete showed higher DF than normal cement concrete.