Abstract
The influence of the quality of silica fume on the workability and strength of high strength concrete was investigated, and the following results were obtained. (1) High strength concretes using 4 types of silica fume were all found to have good workability. (2) There was no difference in the strength of high strength concrete structures using the 4 different types of silica. (3) High strength concretes using silica fume as a mixed binder and as an admixture were both found to satisfy quality requirements.