ANALISIS PENGARUH PENAMBAHAN SERAT KAWAT BERKAIT PADA BETON MUTU TINGGI BERDASARKAN OPTIMASI DIAMETER SERAT ( THE ANALYZE OF THE INFLUENCE OF ADDING HOOKED FIBRE TO THE HIGH STRENGHT CONCRETE BASED ON FIBRE DIAMETER OPTIMATION)

Abstract

Concrete has weakness in the lower tensile strenght and it is brittle so that concrete is given steel enforcement to overcome it. In the research, the concrete mix is given additional material of galvanic fiber wire. The addition is meant to increase the strength of the concrete. Wire fiber used is 1,00 mm in diameter and 60 mm, 75 mm and 90 mm in length so that it is gained the ratio aspect is 60, 75 and 90.The test on the concrete includes compressive strength test, tensile strength test, and flexural strength test. The compressive and tensile strength test were conducted on cylindrical testing materials with 300 mm in height and 150 mm in diameter. The test of flexural strength was conducted on a beam shaped material with size of 150 mm x 150 mm x 600 mm. Fiber used is hooked. The testing material consist of 24 cylinders and 12 cubes. The fiber concentration for each fiber concrete is 2 %. The compressive strength test, tensile strength test and flexural strength test by using concrete fiber indicates the values higher than conventional concrete. The adding of the fiber into concrete will reduce workability. The optimum compressive strength of concrete by galvanic fiber 1,00 mm in diameter is 61,49 Mpa and 75 in l/d. The values almost identically with the later research which the compressive strength optimum is 58,63 Mpa 0,96 mm in diameter and 75 in l/d (Ariatama. A, 2005).