Compressive and Tensile Strength with the Addition of Rebar Wire Fiber to Pre-placed Aggregate Concrete (PAC)

Pre-placed aggregate concrete (PAC) is widely used in civil engineering construction. PAC concrete contains a higher percentage of coarse aggregate because the coarse aggregate is deposited directly into the mold. PAC concrete has a higher compressive strength, elastic modulus, and lower shrinkage than conventional concrete. However, PAC has low tensile strength, so it is necessary to look for materials that can increase the tensile strength of the PAC, one of which is rebar wire fiber. The type of fiber used in this research work is straight rebar wire fiber with a diameter (d) of 1 mm and a length (l) of 60 mm. The mortar with a cement-to-sand ratio of 1.0 and a water-to-cement ratio of 0.45 is used as grouting material for filling the voids between coarse aggregate. The compressive and tensile strength tests showed that the addition of 1% rebar wire fiber contributed to the compressive strength and tensile strength of the pre-placed aggregate concrete (PAC). The compressive strength and tensile strength increased by 11.23% and 38.84%, respectively