フライアッシュをベースとしたジオポリマーコンクリート梁の曲げ終局耐力と復元力特性

抄録

Four-point bending tests were conducted to investigate the flexural properties of fly-ash-based geopolymer concrete beams. Although the geopolymer concrete has a stress-strain relationship with brittle compressive softening behavior, it can be used as a flexural member because it showed ductile bending moment-deflection relationships by installing compression reinforcing bars and transverse reinforcement. The test results revealed that the conventional design method could be used to estimate the bending moment-deflection relationship of geopolymer concrete beams. However, the stiffness reduction ratio for yielding needs to be modified to consider the difference in modulus of elasticity between geopolymer concrete and ordinary portland cement concrete.