Flexural Strength Capacity of the Concrete Beams Produced Using Different Concrete Variables

Flexural strength capacity of the concrete beams depends on different variables such as compressive strength of the concrete, type of the reinforcement used, amount of the reinforcement and cross section of the beam. The flexural strength is expressed as Modulus of Rupture, and it is determined according to ASTM C 293 (center-point-loading). This research is dedicated to investigation of the flexural strength capacity of the concrete beams fabricated using different type of concrete mixtures and different type of reinforcement. The tests presented here were conducted on concrete beams having square cross sections (15cm x 15cm x 1.52m) at Kennesaw State University. Two different types of reinforcement were investigated:  type #4 (13mm) rebar and Greenbar Fiberglass #4 (13mm) rebar along with two different concrete mixture types. Type III cement was used in order to achieve high early strength, and beams were tested to failure when concrete reached prescribed value of 27.6 MPa. In this experimental program load-deflection relationship, load capacity and ductility were the main parameters which were investigated.