EVALUATION OF EFFECT OF BLEND OF LIMESTONE AND GYPSUM ON THE COMPRESSIVE STRENGTH OF PORTLAND BLENDED CEMENT
Keywords:Gypsum, limestone, additive, strength, PCB50 Fico cement
AbstractThe substitution of 5% cement clinker by 5% gypsum or 5% limestone additive as well as the fineness of limestone was studied about its effects on the strength of cement. The study show that the gypsum additive of 5% increase the strength of cement at the time of 1, 3, 7, 28 days (R= 55.1 MPa of cement with 5% substituted additive comparable to R= 45.3 MPa of cement with 100% clinker at the time of 28 days). The limestone additive of 5% increase the strength of cement at the early time of 1, 3, 7 days (R= 46.0 MPa of cement with 5% limestone additive comparable to R= 31.6 MPa of cement with 100% clinker at the time of 7 days). As well as, the strength of cement increase when the fineness of limestone increase.
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