Effect of Hybridization of Calcium Carbide Waste and Rice Husk Ash on the Properties of Self-Compacting Concrete

Abstract

Deformability and segregation resistance are the basic properties of SCC responsible for the tremendous rate of utilization in concrete production. SCC flows freely under own-weight while maintaining a homogeneous composition. This study is aims at investigating the effect of using rice husk ash (RHA) and calcium carbide waste (CCW) as supplementary cementation material. In this research, the variable parameters are the proportion of rice husk ash at 0% and 10%, as an additive to cement content, and calcium carbide as a replacement with different percentage of 0%, 5%, 10%, 15%, and 20%. Fresh concrete properties of SCC containing RHA and CCW, as well as mechanical properties of SCC containing rice husk ash and CCW were evaluated. The result indicates that addition CCW in the SCC mixtures reduce its workability although it is within the limit of 650 – 750 mm specified by EFNARC-2002. The maximum compressive strength of 35.4 MPa was observed for 10% RHA and 0% CCW concrete specimen, which exceeds the strength of the control sample. Generally, the mechanical properties of other concrete mixes decrease with an increase in RHA content and percentage replacement of cement with CCW, Thus the addition of RHA improved in mechanical properties of SCC.