Affiliation:
1. Imperial College of Science and Technology: Department of Materials
Abstract
Synopsis The microstructure of the transition zone in high strength concretes, with and without silica fume, was characterized. Backscattered electron (bse) imaging combined with quantitative image analysis was used to measure the quantity and distribution of unreacted cement, pores larger than 0·5 μm and calcium hydroxide. For concretes of the same water/binder ratio, the silica fume was found to exert only a small influence on the porosity measured in the bulk paste. In the concretes without silica fume the transition zone was more porous than the bulk cement matrix. However, in the concretes with silica fume, the transition zone was much denser, having a level of porosity similar to that of the matrix. These results confirm and support the hypothesis that a major effect of silica fume in concrete is the improvement of the aggregate/matrix bond.
Subject
General Materials Science,Building and Construction
Cited by
135 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献