Experimental research on durability of recycled aggregate concrete under freeze- thaw cycles

[摘要] The freeze-thaw durability of recycled aggregate concrete has significance for the concrete buildings in the cold region. In this paper, the rapid freezing and thawing cycles experience on recycle aggregate concrete was conducted to study on the effects of recycle aggregate amount, water-binder ratio and fly ash on freeze-thaw durability of recycle aggregate concrete. The results indicates that recycle aggregate amount makes the significant influence on the freeze-thaw durability. With the increase of recycled aggregates amount, the freeze-thaw resistance for recycled aggregate concrete decreases. Recycled aggregate concrete with lower water cement ratio demonstrates better performance of freeze-thaw durability. It is advised that the amount of fly ash is less than 30% for admixture of recycled aggregates in the cold region.

[发布机构] Engineering Section, Northeast Dianli University, Jilin; 132012, China^1;School of Civil Engineering and Architecture, Northeast Dianli University, Jilin; 132012, China^2

[效力级别] 无线电电子学

[关键词] Experimental research;Freeze-thaw cycles;Freeze-thaw durability;Freeze-thaw resistance;Recycled aggregate concrete;Recycled aggregates;Water binder ratio;Water-cement ratio