Impact resistance and mechanical properties of High Strength Concrete containing local material

Abstract

Abstract High Strength Concrete (HSC) is an expression which is used to define a concrete with high performance and strength exceeds 40 MPa. The high elasticity or strength and low shrinkage and permeability are considered the main properties of the HSC. The aim of this study is to investigate the effect of High Reactivity Metakaolin (HRM) and/or Silica Fume (SF) on the properties of HSC. Local material “Kaolin Clay” was prepared as a pozzolana and the final product confirms the physical and chemical requirements of natural pozzolana. Eight mixes of the HSC with partial cement were replaced by HRM and SF (either individually or in combination). The effect of HRM and SF on the compressive, flexural strength, splitting tensile, impact resistance and modulus of elasticity of the HSC were studied. The results showed that the mix with 10% of HRM provided higher effect on the mechanical properties and impact resistance of the HSC. In addition, the HSC with the combined of 5% SF and 5% HRM exhibited greater performance and more economic than other mixes.