STRENGTH PROPERTIES OF CONCRETE BY PARTIAL REPLACEMENT OF CEMENT WITH SILICA FUME AND FINE AGGREGATE WITH QUARRY DUST

Abstract

The main aim of the experimental investigation is to find the combined influence on strength properties of
concrete prepared using Silica Fume (SF) and Quarry Dust (QD). Quarry Dust is used as partial replacement of natural
sand and Silica Fume as partial replacement of cement. In the present experimental investigation the fine aggregate
(Sand) is partially replaced 30%, 60% and 100% by Quarry Dust and the cement is partially replaced by 5%, 10% and
15% of Silica Fume by weight. The combined influence of Quarry Dust and Silica Fume on compressive strength, split
tensile strength, flexural strength and modulus of elasticity of M30 grade of concrete is investigated. The test results of
concrete prepared using the different combinations of Quarry Dust and Silica Fume are compared with that of controlled
concrete. The variation of different strength properties indicates the same trend as that of controlled concrete. Based on
the test results, it can be observed that the concrete prepared with a combination of 60% Quarry Dust and 10% Silica
Fume possesses improved strength properties compared to the controlled concrete. The increase in the various strength
characteristics of concrete containing Quarry Dust and Silica Fume can be attributed to the effective particle packing
and also the availability of additional binder in the presence of Silica Fume.