摘要
聚乙烯醇(PVA)纤维是一种具有高抗拉、高弹模,亲水性好,特别是与波特兰水泥有良好的相容性等特点的新型纤维.为配制出高韧性、大变形纤维增强水泥基复合材料,试验介绍了PVA纤维增强水泥基复合材料的单轴拉伸性能和弯曲韧性,试验结果表明:PVA纤维具有良好的阻裂增韧效用,能够显著提高水泥基复合材料的抗裂性能和变形能力;PVA纤维可明显改善混凝土弯曲韧性,且PVA纤维混凝土的弯曲韧性指数明显高于聚丙烯(PP)纤维混凝土.
Polyvinyl alcohol(PVA) fiber is a new type fiber,which has high strength,elastic modulus and good hydrophilicity,especially compatibility with portland cement.For the preparation of high toughness and large deformation fiber reinforced cementitious composites,uniaxial tensile mechanical properties and flexural toughness behavior of PVA fiber reinforced cementitious composites are introduced in this paper.The results show that PVA fiber has good utility of resistance and toughening,and can improve crack resi...
出处
《郑州大学学报（工学版）》
CAS
北大核心
2009年第1期92-95,共4页
Journal of Zhengzhou University（Engineering Science）
基金
北京市自然科学基金资助项目(8082002)
关键词
单轴拉伸
弯曲韧性
抗裂性能
uniaxial tensile
flexural toughness
crack resistance
