不同矿物掺合料对蒸养和压蒸养混凝土力学性能的影响  

Influences of Different Mineral Admixtures on the Mechanical Behavior of Steam-curing and Autoclave-curing Concrete

作　　者：张贤哲[1] 何廷树[1] 胡延燕[1] 

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055

出　　处：《硅酸盐通报》2014年第3期686-690,696,共6页Bulletin of the Chinese Ceramic Society

摘　　要：研究了单掺和双掺石英粉、矿粉对混凝土蒸养、压蒸养强度的影响，并进行了微观分析，结果表明，掺量范围在10％～40％，掺入矿粉后混凝土的蒸养强度和压蒸强度都比较高，而石英粉的掺量过大时会降低蒸养强度，在复掺30％掺量下，石英粉与矿粉复掺比例为1：2时的强度最高，同时当复掺比例为1：1的时候混凝土的强度大于30％单掺石英粉的强度，却小于30％矿粉单掺的强度，说明矿粉对混凝土的强度贡献比石英粉大，且二者之间存在优势互补的现象。两种矿物掺合料均减少了有害Ca（OH）2晶体含量，生成更多的托勃莫来石（C5S6H5）晶体。In this paper, the effects of slag, quartz powder and composite admixture of them on the strength of steam-curing and autoclave-cuing concrete were investigated, and the microstructure of samples with different admixtures was also analyzed. The results showed that mixing slag （ 10% -40% ） with cement could increase strength of concrete. The steam-curing strength of cement was reduced with the increase of the quartz powder mixed. Under the compound admixture 30% content, the sample with the ratio of 1：2 with quartz powder and slag appeared to be the highest strength of concrete. Meanwhile with the ratio of 1： 1, the strength of concrete was greater than 30% single-doped of quartz powder but less than 30% single-doped of slag. It showed the contribution of slag to the strength of concrete was higher than that of quartz powder, and it existing the phenomenon of complementary advantages between the two. The mineral admixtures could reduce the content of Ca （OH）2 crystal and produced more C5S6H5 crystal.

关 键 词：矿物掺合料 蒸养和压蒸养混凝土 力学性能 

分 类 号：TU528[建筑科学—建筑技术科学]