硅酸盐通报2018，Vol.37Issue(6)：1983-1988,6.
预湿水泥浆颗粒内养护材料对混凝土早期自收缩及抗压强度的影响
Influence of Internal Curing by Pre-wetted Cement Particles on the Early-aged Autogenous Shrinkage and Compressive Strength of Concrete
摘要
Abstract
Cement paste particles with different particle size and water-cement ratio were prepared as internal curing ( IC) material of concrete with low water-cement ratio.Three kinds of concrete was designed based on the optimum IC water to cement ratio, which sand is replaced by equal volume with the same size of cement paste particles with different water-cement ratio of 0.6, 0.7 and 0.8.Influence of cement paste particles with different water-cement ratio on the early-age autogenous shrinkage, compressive strength and microstructure of concrete was investigated.The results show that the water absorption rate of particles is positively correlated with the water-cement ratio and negatively correlated with particle size.Pre-wetted cement particles can significantly reduce the early-age autogenous shrinkage of concrete, and the autogenous shrinkage decreases with the increase of the water-cement ratio of particles.However, the mixing of pre-wetted particles will reduce the compressive strength of concrete, the compressive strength of concrete decreases with the increase of water-cement ratio of particles, the water-cement ratio of the IC particles should be optimized in the application.As the IC material of concrete, Cement paste particles can improve the pore structure of micro-interface, increase the compactness of the interface and reduce the autogenous shrinkage of concrete in the early-age.关键词
内养护/水泥浆颗粒/自收缩/抗压强度Key words
internal curing/cement paste particle/autogenous shrinkage/compressive strength分类
建筑与水利引用本文复制引用
王宇轩,陈佩圆,徐颖,沈朋辉,张东磊,施宇航..预湿水泥浆颗粒内养护材料对混凝土早期自收缩及抗压强度的影响[J].硅酸盐通报,2018,37(6):1983-1988,6.基金项目
国家自然科学基金海外及港澳学者合作研究基金(51728201) （51728201）
安徽省博士后基金(2017B150) （2017B150）
安徽理工大学博士、硕士基金 （）
