CAJ | 학술논문

研究了水灰比、纤维种类、掺量和水泥基材对挤压成型纤维水泥板及其复合梁的力学性能与耐久性能的影响.结果表明掺加纤维后板材韧性有显著改善;PVA纤维增强板材当纤维掺量达1.7%时表现应变硬化,出现多点开裂;PP纤维则呈现应变软化.两种纤维增强水泥基材料性能的差异是由于纤维自身性能的不同.以纤维增强板为底板,制作的纤维板/混凝土复合梁的极限荷栽和相应挠度,与普通混凝土梁相比都得以改善;同时与普通混凝土梁相比,复合梁的抗氯离子渗透性能更好.
연구료수회비、섬유충류、참량화수니기재대제압성형섬유수니판급기복합량적역학성능여내구성능적영향.결과표명참가섬유후판재인성유현저개선;PVA섬유증강판재당섬유참량체1.7%시표현응변경화,출현다점개렬;PP섬유칙정현응변연화.량충섬유증강수니기재료성능적차이시유우섬유자신성능적불동.이섬유증강판위저판,제작적섬유판/혼응토복합량적겁한하재화상응뇨도,여보통혼응토량상비도득이개선;동시여보통혼응토량상비,복합량적항록리자삼투성능경호.
The effect of water to cement ratio, fiber types and content, cement types on the bending performance of the extruded fiber reinforced cementitious board were studied. And it was found that polyvinyl alcohol (PVA) fibers can significantly improve the ductility of the board compared with polypropylene (PP) fibers. As PVA fiber content achieved 1.7%, the strain hardening and multiple cracking were occurred on the extruded board, while strain-softening were shown on PP fiber reinforced cement board. The difference between the two kinds of board was from the differences of the mechanical properties of the two fibers. In addition, taking the fiber reinforced extruded board as base, the ultimate bending strength, as well as and the corresponded deflection and the resistant to chloride iron penetrating, was improved for a composite beam with fiber board and concrete compared with those of traditional concrete beam.