Optimizing the mechanical Properties of Pervious Concrete Containing Calcium Carbide and Rice Husk Ash using Response Surface Methodology

Abstract

Pervious Concrete (PC) have continued gaining acceptability significantly over years due to its sustainability and environmentally friendly. There are many benefits of using PC, some of which includes management of storm water runoff, groundwater supplier recharging and reduction of heat island effects etc. Numerous studies have been carried out through employing different approaches in order to improve the overall performance of PC. Due to the advancement in high performance PC using supplementary cementitious materials, extensive application of this material was made possible. In this study, calcium carbide waste (CCW) and rice husk ash (RHA) were used as supplementary cementitious materials and up to 20% replacement was made for both RHA and CCW in the PC mixes. Response surface methodology was used to derive the mathematical relationship between strengths and the variables RHA and CCW. The workability, flexural strength, compressive strength and splitting tensile strength were investigated and at 0%RHA and 10%CCW the strength of concrete increases significantly when compared with the control mix.