High-performance structural mortars with the admixture of silica fume from steel waste

Resumo

The objective of this work is to evaluate the use of silica fume captured in bag filters on the mechanical and physical properties, durability and microstructure of a high-performance structural mortar. The mix ratio was defined through particle packing and the following properties were evaluated: compressive and flexural strength, water absorption, porosity, dynamic modulus of elasticity, electrical resistivity and microstructure. Mixture proportion through particle packaging promoted densification of the mortar, improving the mechanical properties and durability. As a result, the filler effect was maximized by particle packing, and the pozzolanic effect promoted the improvement of properties in the long term.It is concluded that it is possible to use waste from producing metallic silicon and iron silicon captured in bag filters as silica fume.

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