Effect of using different mineral additives on properties of self-compacting concrete

Abstract EN

In recent years, self-compacting concrete (SCC) has gained wide application in the construction industry.

SCC is one of the concrete technologies contributing the sustainable development by using filler materials.

The fresh characteristics, strength and durability of SCC can be improved with the addition of filler powders.

Industrial by-products such as fly ash (FA), silica fume (SF) and blast furnace slag (BFS) are generally used as filler materials in SCC.

Thereby, the workability of SCC is improved.

Through this work, different mineral additives, which are silica fume (SF), fly ash (FA), blast furnace slag (BFS), limestone powder (LP), cement dust (CD) and rice husk ash (RHA) were employed as a partial replacement of cement with 10 % in selfcompacting concrete mixes to investigate their effect on the fresh and hardened properties.

The fresh concrete properties were determined from slump flow and V-funnel flow tests.

The mechanical properties of SCC such as compressive strength and tensile strength were determined to evaluate the performance of SCC.

In addition, the hardened properties of the different SCC mixes were compared with a traditional mix.

The results show that using the different mineral additives (SF, FA, BFS, LP, CD and RHA) in this study as a partial replacement of cement with 10 % in self-compacting concrete ensures good workability as determined by slump flow and V-funnel flow tests and sufficient mechanical properties determined by compressive strength and tensile strength.

In addition, such usages of by-products or waste provide economical benefits and prevent environmental pollution.