Preliminary Feasibility of Utilizing Clay Brick Debris as Partial Replacement for Fine Aggregate and Portland Cement in Concrete Works

Abstract

The purpose of paper is to consider the preliminary feasibility of utilizing clay brick debris as partial substitution of fine aggregate and portland cement. The ground clay brick debris which almost same size distribution as that of sand used as partial fine aggregate. Meanwhile, fine ground clay brick which pass through sieve no.325 is subject to be a partial substituted cementitious material. It was found the 25 percent of sand substitution yielded the higher compressive strength of concrete than that of the control samples since 7 days curing period. The investigation in partial replacement for cement show that 20 percent of ground clay brick substitution speeded up compressive strength equivalent to that of 28 days of the control mortar within 24 hrs. of autoclave conditions. This is probably due to the chemical reaction between crystalline silica of ground clay brick and calcium hydroxide generated from cement hydration under high pressure steam curing leading to increasing in cementitious products.