Strength and Strength of Lightweight Steel Reinforced Concrete Beam

Abstract

In the world of construction, reinforced concrete beams use longitudinal reinforcement in order to withstand the tensile stress that occurs in the cross section of the concrete beam and the longitudinal reinforcement used is steel reinforcement (rebar reinforcemen). Tensile stresses reaching 420 MPa are the main reason for reinforcing steel used in reinforced concrete beams, however, due to technological developments, there are materials that have tensile stresses that exceed reinforcing steel, namely mild steel. mild steel is light cold rolled steel with high quality which is light and thin, but has a tensile stress that exceeds ordinary reinforcing steel, which is 550 MPa, so in this study we will use mild steel reinforcement for C channel and U channel as reinforcement. concrete block structure. The purpose of this study was to determine the difference between the flexural strength of concrete beams using mild steel and concrete beams using steel reinforcement and to calculate the stiffness value. This research was carried out through several stages, namely: procurement of materials and equipment, inspection of materials and equipment, planning of concrete mixes, concrete manufacture, concrete treatment (curing), concrete testing and analysis of research results. from samples with 2 comparisons that have been tested, the average flexural strength value in 3 samples of reinforced concrete beams with mild steel reinforcement is 391.96 kg/cm² U channel and the average flexural strength value from 3 samples of C channel is 385, 44 kg/cm² and for the average value of the shear strength test results from 4 U channel specimens is 66.28 kg/cm².