Experimental research and theoretical analysis on carbonation resistancebehavior of recycled aggregate concrete
Xiao Wenguang , Guo Zhanggen , Wu Zhengpeng , Tu Xiny , Peng Yang
DOI:
Received July 11, 2015,Revised , Accepted , Available online January 05, 2016
Volume ,2015,Pages 47-53
- Abstract
An accelerated carbonation experimental analysis on carbonation resistance behavior of recycled concrete was carried out. The influence of recycled coarse aggregate replacement ratios, water cement ratios, cement content, the strength of natural concrete and the kinds of mineral admixture on the carbonation resistance of recycled concrete was studied. The results show that the carbonation depth decreases with the increase of water cement ratios and recycled coarse aggregate replacement ratios, while it increases with the growth of strength of natural concrete and cement content.Moreover, the addition of mineral admixture replacing cement partially can also decrease the carbonation depth of recycled concrete. Based on the current prediction models of natural concrete carbonation depth, the prediction model of recycled concrete carbonation depth wasestablished through regression analysis of experimental data from this paper and the results of the model agreed well with the experimental results from other researchers in China.