KUAT TEKAN DAN LENTUR BETON MENGGUNAKAN PASIR SUNGAI MAULU DAN AGREGAT BATU GUNUNG PUTIH

Abstrak

Concrete materials are increasingly used in civil engineering construction especially in building constructiontoday. The concrete materials usually taken from various sources in terms of the type and quarry of materials mustentirely meet their specified standards. For the purpose of the feasibility study, the fine aggregate such as sand wasobtained from Maulu River and the coarse aggregate such as gravel was obtained from crushed white mountain rocks.The method used in the study is to test the properties of the materials including fine and coarse aggregates. Researchmethodology in this study was Mix Design using the DOE method with K-300 concrete compressive strength resultingfrom cylindrical Ø15-30cm concrete sample and beam 100 mm x100 mm x400 mm concrete sample to obtain averageflexural strength. Meanwhile, the concrete construction work generally requires K-250 concrete quality for buildingconstructions and K-300 concrete quality for road constructions. The results showed good quality of aggregate asconcrete materials for their compressive and flexural strengths based on their target quality. The physical characteristicsof the fine aggregates include water content of 4.88%, sludge content passed # 200 of 4.20%, weight volume of 1.31 kg/lt, specific specific gravity of 2.38, absorption of 3.34%, modulus of fineness of 7.69 and organic content No. 3.Furthermore, the characteristics of the coarse aggregate are water content of 0.37%, sludge content passed # 200 of3.36%, volume weight of 1.41 kl / lt, specific density of 2.54, absorption of 3, 34%, smoothness modulus of 7.69 andabration modulus of 25.33%.