Influence of steel fiber volume and volcanic pumice powder on self-consolidating concrete properties

الملخص EN

This study investigated the effect hook-end steel fiber (HSF) and volcanic pumice powder (VP) on the behavior of self-consolidating concrete (SCC).

VP is considered a partial replacement material of cement because its mass has a high content of pozzolanic properties (up to 76.4%).

The VP replacement rate of cement mass was 30%.

In addition, SCC was reinforced with HSFs with a length of 60 mm and concrete volume fraction of 0%, 0.25%, 0.50%, 0.75%, and 1%.

The rheology, workability, flowability passability, fillability, and consistency of fresh SCC were assessed using bleeding and segregation resistance, slump, L-box, and V-funnel tests.

The properties of hardened SCC were examined through compressive, indirect tensile, and flexural strength tests.

Results showed that the use of VP improved the fresh properties of SCC.

However, the addition of HSF led to a negative effect on the fresh properties of SCC.

The results of indirect tensile and flexural strength tests demonstrated that the addition of HSF enhanced the properties of hardened SCC.