Assessment on Tension Bar Lap Splices of Concrete Reinforcement Steel

Abstract

Splicing rebar with lap splices must be done in its implementation due to the influence on the methods of implementation and the availability of existing reinforcing steel length. Lap splices length (ld) serves to channel the force borne by the steel reinforcement. Lap splices length testing conducted to determine the distribution of force occurs. The test specimen lap splice using a class B which is 1.3 ld with concrete covers at least 3 cm. By using an experimental study in which the use of reinforcing steel D-10 with a lap splices length of 1.3 ld by 43 cm, 1.2 ld by 40 cm using K-400 concrete and calculation analysis produces the lap splices length 27 cm and 30 cm use quality of concrete K-400 and K-450. Tests using the tensile test equipment (Universal Testing Machine) in laboratory B2TKS BPPT. Results from this study is the length of the lap splices of 1.3 ld and 1.2 ld use quality of concrete K-400 is able to meet the mechanical properties of reinforcing steel for the collapse occurred in the reinforcing steel. With lap splices length 27 cm and 30 cm using quality of concrete K-400 occur in lap splice collapse after passing the yield stress of reinforcing steel 40 kg/mm2. While the lap splices length 27 cm and 30 cm using the quality of concrete K-450 collapse there are a difference between the test specimens due to the tension that occur closer to the ultimate stress of rebar's at 57 kg / mm2