THE INFLUENCE OF THE SHAPE OF GALVANIC FIBER WIRE IN CONCRETE USING SAMBOJA SAND AS A LOCAL MATERIAL OF EAST KALIMANTAN

Abstract

Fibers in concrete prevent crack creating the concrete become stronger compared to the
concrete without fibers. Galvanized wire is widely used because it is cheap, easy to form
and maintain. The galvanized wire can be implemented for concrete fiber to delay the
concrete failure due to the load. This research aims to obtain the shape of the synthetic
fiber of galvanized wire that is cheap and can increase the concrete strength optimally
with regards to compressive, tension and bending strength. In this experiment, the shapes
of the fiber that were used are rolled and spiral. The result shows that the sample with
rolled fiber shape produced higher strength than the spiral fiber shape. The smaller the
diameter of the rolled fiber shape, the stronger the concrete. Sample L2 (rolled 2)
produced 19,83 MPa, 18,30 MPa, 8,58 MPa and 3,96 MPa for 14-day compressive
strength, 28-day compressive strength, tensile strength and bending strength respectively.