Flexural Behavior of Reinforced Concrete Beam where Concrete is Partially Replaced by Foam

Abstract

Reinforced concrete beams have a lower weight but still have significant flexural capacity. Partial foam concrete replacement to reduce the weight of beam and study the flexural behavior and failure characteristics of reinforced concrete beam. The sample beam, cross sectional size 10 x 15 centimeters with span length 120 centimeters with two 9 millimeters diameter bars in both tension and compression sides. The beams are replaced by foam with a cross section of 2.50 x 5.00centimeters, divided into 2groups: 2 foam insert group, 20 30 and 40 centimeters long, and 1 foam insert group, 90 centimeters long. The designed
compressive strength of a standard cubical concrete 240 kilograms per square centimeter were used for this research with a curing age of 28 days. The sample was tested by 3 points and 4 points bending force for flexural strength and deflection until the beam failed. The results are compared with reinforced concrete beams of the same cross section and length, but without foam replacement. It was found that the position of placing the foam in type 2x40 centimeters can bear the maximum bending moments of 6.46, which were lower than 5.42 percent compared to the normal sample beam. Demonstrates a significant flexural
strength compared to the reduced beam weight