COMPRESSIVE STRENGHT OF CONCRETE MATERIAL FROM SAND OF RIVER AND SEA FINE AGREGATS
Keywords:concrete, sand of river, sand of sea, compressive strength.
This study used an experimental method in the laboratory with a total of 9 samples. The test object consisted of cylindrical concrete with different variations of the mixture of Progo River Sand and Parangkusumo Sea Sand. The purpose of this study was to determine the ratio of the average compressive strength of the mixture of Sea Sand (PL) with Progo River Sand (PS) mixture with PS 50 mixture variation % + PL 50%, PS 100% and PL 100% and each variation of the test concrete mixture is made 3 specimens in the form of concrete cylinders with dimensions of 15 cm x 30 cm. The concrete compressive test was carried out at the age of 28 days. The test results for the average compressive strength of the concrete mixture of 50% Parangkusumo Sea sand and 50% Progo River sand are 17.3 N / mm2. The result of the average concrete compressive strength test on the variation of the 100% Parangkusumo sea sand mixture is 14.77 N / mm2 while the 100% mixture of Progo River sand is 21.96 N / mm2. So from the results of this test it can be concluded that the compressive strength of mixed variations of concrete in the Progo river sand 100% has an average compressive strength value greater than the 100% Parangkusumo sea sand mixture.