NORMAL CONCRETE COMPRESSIVE STRENGTH USES COARSE AGGREGATE (COAL STONE) KEEROM DISTRICT

Abstract

Concrete is one of the building construction materials that has been commonly used. The concrete constituent consists of cement, fine aggregate, coarse aggregate and water. The development in Keerom District, especially in Arso District, still uses sand from the times of Keerom Regency to be used as fine aggregate material in the manufacture of concrete. But the quality is not scientifically known, so it is necessary to do research on the feasibility of the quality of concrete from these materials. The purpose of this study was to determine the concrete compressive strength using the local agronomy of the Arso District of Keerom Regency. The method used for data analysis is a trial method. The results of testing the compressive strength of concrete showed that the local aggregate of Keerom Regency had compressive strength with an average value of three specimens of 19.76 MPa for 7 days, and 23.83 MPa for 14 days and 26.01 MPa for 28 days