纳米SiO2和PVA纤维增强水泥基复合材料抗压强度研

关键字：纳米,SiO2,PVA纤维,增强水泥基,复合材料,强度

（1.郑州大学 水利与环境学院，河南 郑州  450001；2.三门峡市昌通路桥建设有限责任公司，河南 三门峡  472000；
3.三门峡市建设工程质量监督站，河南 三门峡  472000）

    摘要：探讨了纳米SiO2和PVA纤维掺量及石英砂粒径对水泥基复合材料工作性和抗压强度的影响。结果表明，随着纳米SiO2和PVA纤维体积掺量的增大，水泥基复合材料的工作性逐渐降低，立方体抗压强度和轴心抗压强度均先提高后降低；随着石英砂粒径的减小，水泥基复合材料的工作性、立方体抗压强度和轴心抗压强度均逐渐降低。纳米SiO2和PVA纤维最佳掺量分别为1.0%和0.9%。
    关键词：纳米SiO2；PVA纤维；水泥基复合材料；工作性；抗压强度
    中图分类号：TU528.58        文献标识码：A        文章编号：1001-702X（2017）12-0094-04

Study on compressive strength of nano-SiO2 and PVA fiber reinforced cement based composites
ZHANG Peng1，ZHAO Shikun1,YU Hongliang2，YANG Kai2，SU Hongmei3
（1.School of Water Conservancy and Environment，Zhengzhou University，Zhengzhou 450001，China；
2.Changtong Road & Bridge Construction Co. Ltd. of Sanmenxia，Sanmenxia 472000，China；
3.Construction Engineering Quality Supervision Station of Sanmenxia，Sanmenxia 472000，China）

   Abstract：The effect of nano-SiO2 content，PVA fibers content and silica sand particle size on the workability and compressive strength of cement based composites was discussed. The results show that with the increase of the content of nano-SiO2 and volume dosage of PVA fibers，the workability decreases gradually，while the cube compressive strength and axial compressive strength increase gradually first，and then decrease. With the decrease of particle size of silica sand，there is a tendency of decrease on workability，cube compressive strength and axial compressive strength of cement based composites. The optimum dosages of nano-SiO2 and PVA fiber to the reinforcement on cement based composites were 1% and 0.9%，respectively.
   Key words：nano-SiO2，PVA fiber，cement based composite，workability，compressive strength