Silica Fume Concrete

Abstract

Silica Fume Concrete is a very fine powder — the particles are approximately 1 ⁄100 the diameter of portland cement grains. When used to produce high-performance concrete, silica fume is typically 4-15% of the cement weight. The exact addition rate depends upon on the specific performance characteristic to be improved. Compared to the other ingredients in concrete, the amount of silica fume used is small.. For the silica fume to be effective, there are two issues that must be addressed:First, the agglomerations that make up the densified silica fume must be broken down.Second, the silica fume must be distributed uniformly throughout the concrete.