The purpose of this study is to investigate the behavior and ductility of reinforced high-strength concrete beams using fly ash artificial lightweight aggregate. All of 10 specimens have the same cross sectional dimensions (180mm×220mm×2790mm) and a...
The purpose of this study is to investigate the behavior and ductility of reinforced high-strength concrete beams using fly ash artificial lightweight aggregate. All of 10 specimens have the same cross sectional dimensions (180mm×220mm×2790mm) and are tested in condition of simply supported beam under an two-point loading. Five reinforced high-strength lightweight concrete beams and five reinforced high-strength normal concrete beams with different tensile reinforcement ratio () were tested to investigate their behavior. Test results indicate that the ratio of flexural strength between experimental results and those by ACI 318 is 1.00 in case of normal concrete beams and 1.01 in case of lightweight concrete beams. The reinforced high-strength concrete beams using fly ash artificial lightweight aggregate behave more brittly than high-strength normal concrete beams with equal reinforced ratio after maximum strength. When concrete compressive strength is 40MPa in reinforced high-strength lightweight concrete beams, the ratio of longitudinal reinforcement to balanced reinforcement needs to be limited to 0.5 in order to obtain 3 in ductility factor.