ANALISIS KARAKTERISTIK BETON NORMAL DENGAN BATU KARANG GUNUNG MADURA SEBAGAI SUBSTITUSI KERIKIL

Abstract

As a result of the abundance of mountain rock on Madura Island, which is geographically based on Madura Island, it is composed of mountainous rocky mountains, causing many Madurese people to use Madura mountain rock aggregate as coarse aggregate rather than having to supply it from outside Madura Island. For this reason, this study aimed to determine the effect of using Madura mountain coral aggregate as an alternative material to substitute coarse aggregate on the compressive strength and split tensile strength with variations of 0%, 50%, 75% and 100%. The method used is experimental with reference to SNI 03-2834-2000 for the plan of making concrete with a design compressive strength of 25 MPa, cylindrical specimens with a size of 15 x 30 cm and a design age of 7, 21 and 28 days for compressive strength and 28 days. for the split tensile strength of concrete with all activities carried out at the Materials Test Laboratory of Civil Engineering, State Polytechnic of Malang. From the results of this experiment the compressive strength and tensile strength values ​​have no effect on original concrete because the compressive strength value does not reach the planned target of 25 MPa. The optimum average compressive strength value at 28 days is 18,825 MPa at a variation of 75%. Meanwhile, the optimum split tensile strength at 28 days is 2.795 MPa at variation of 0%.