徐州市重点研发计划(产业前瞻与共性关键技术领域)(KC18106)
通过拉伸和四点弯曲试验,研究了纤维编织网的层数及种类、纤维编织网表面浸胶粘砂处理以及聚乙烯醇（PVA）纤维体积分数对纤维编织网增强工程水泥基复合材料（TRE）拉伸和弯曲性能的影响.结果表明：和单层网TRE试件相比,双层网TRE试件的极限拉应力提高了将近1倍,极限弯曲荷载从单层碳纤维玻璃纤维编织网TRE试件的073kN增大到162kN,极限拉应力和极限弯曲荷载明显提高,刚度增大;与碳纤维玻璃纤维混编网TRE试件相比,玄武岩纤维玻璃纤维混编网TRE试件的拉伸和弯曲性能均较低;将碳纤维玻璃纤维混编网表面进行浸胶粘砂处理后,TRE试件的极限拉应力和极限弯曲荷载均降低,但极限拉应变和极限挠度增大;当PVA纤维体积分数从10%增加到20%时,单层碳纤维玻璃纤维混编网TRE试件的极限拉应力从415MPa增至705MPa,弯曲开裂荷载从008kN增至021kN,试件的拉伸和弯曲性能提高.
Through tensile and four point bending tests, the effects of the layers and types of textile, the coating treatments of textile, and the volume content of polyvinyl alclohol(PVA) fibers on the tensile and bending properties of textile reinforced engineered cementitious composites(TRE) were studied. The test results show that, compared with the single layer carbon fiber glass fiber TRE specimens, the ultimate tensile stress of the double layer TRE specimens becomes nearly double, the ultimate bending load increases from 073kN to 162kN, the ultimate tensile stress and ultimate bending load are significantly improved, and the rigidity is increased. Compared with carbon fiber glass fiber TRE specimens, the tensile and bending properties of basalt fiber glass fiber TRE specimens are lower. The ultimate tensile stress and ultimate bending load of the TRE specimens show a decreasing trend after the carbon fiber glass fiber textile surface is impregnated by epoxy resin and covered with sand, but the ultimate tensile deformation and ultimate mid span deflection increase. When the PVA fiber volume content is increased from 10% to 20%, the ultimate tensile stress of the single layer carbon fiber glass fiber TRE specimen increases from 415MPa to 705MPa, the bending cracking load increases from 008kN to 021kN, the tensile and bending properties of TRE specimens are improved.
李传秀,尹世平,赵俊伶.纤维编织网增强ECC的拉伸和弯曲性能[J].建筑材料学报,2021,24(4):736-741
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