PEMANFAATAN PASIR DAN KERIKIL GUNUNG AGUNG KABUPATEN KARANGASEM SEBAGAI BETON NORMAL

The Karangasem District as one of eight districts in the eastern part of Bali has the abundant category C excavation materials from the eruption of Mount Agung. Hitherto, a quite greater number of its exploitation for the construction projects in Karangasem has been found, particularly its utilization as the materials in building construction. The aims of this research was to identify the properties of materials and normal concretes, including compressive strength, flexural strength, modulus of elasticity and water absorption of concrete using materials from Mount Agung Bali. In this research, the coarse aggregate and fine aggregate utilized The Mount Agung originated in aggregates and gravels in the traditional excavation at Candi Gaha Village, Kubu, Karangasem District, while the cement used is Type 1 Gresik cement brand and the water used derived from Construction Material Laboratory, Civil and Environmental Engineering Department, Faculty of Engineering, Gadjah Mada University. The value of water/cemen ratio was determined at 0.4, 0.5, 0.6 with slump value at 6 ± 2 and 10 ± 2, respectively. Total specimen involved 9 cylinders, 3 cubes and 3 blocks for each mixture. The concrete compressive strength test was conducted at the ages 3, 7 and 28 day