硅酸盐通报2013，Vol.32Issue(4)：687-691,707,6.
碳化对混凝土微观结构的影响
Influence of Carbonation on the Microstructure of Concrete
摘要
Abstract
Carbonation will not only cause the drop of pH value of concrete, also changes in the pore size distribution and porosity of hardened cement paste, thereby affecting the diffusion process of harmful ions in concrete. It is extremely significant to research the influence of carbonation on the microstructure of concrete. The mercury pressure test and SEM test were carried out at pore structure and morphology of concrete. The results show that carbonation caused a decline of the concrete porosity, but both of the critical pore diameter and most probable pore diameter are increasing, connectivity of the pore is increased. After carbonation, Ca(OH)2 reacts with CO2 to generate a large number of CaCO3, diamond crystals were formed from the carbonized layer. There are connected pores between the crystals.关键词
碳化/汞压力试验/扫描电镜试验/孔隙结构/微观形貌Key words
carbonation/ mercury pressure test/ SEM test/ pore structure/ morphology分类
建筑与水利引用本文复制引用
元成方,牛荻涛,陈娜,段付珍..碳化对混凝土微观结构的影响[J].硅酸盐通报,2013,32(4):687-691,707,6.基金项目
国家杰出青年科学基金(50725824) （50725824）
