Cupola slag as partial replacement of coarse aggregate in concrete

Abstract

Cupola slag, an industrial waste, is a foundry by product causes air, soil and water pollution and also responsible for global warming. The physical properties of cupola slag suggest that it can be used as replacement of coarse aggregate in concrete mix. The M20 grade concrete has been prepared for experimental study with water: cement ratio = 0.55. The coarse aggregate has been replaced with cupola slag by 0 to 50% in step of 10 weight percentage. It is observed that the workability has reduced with the increases in weight percent of copula slag. Maximum reduction of workability has been noted at the 50% replacement of coarse aggregate by cupola slag as compared to the controlled concrete sample. The compressive strengths of the concrete samples have been tested after 7 days and 28 days of curing. The criteria for M20 grade concrete are successfully attained by the samples up to 40 wt% of cupola slag replacement and with further addition of cupola slag i.e. the sample with 50 wt% of replacement fails to qualify as M20 grade concrete. Therefore. It can be concluded that the cupola slag can be used as coarse aggregate in concrete which can reduce environmental pollution and global warming.