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%.“,”The effect of nano-SiO2content,PVA fibers content and silica sand particle size on the workability and compres-sive strength of cement based composites was discussed. The results show that with the increase of the content of nano-SiO2and 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-SiO2and PVA fiber to the reinforcement on cement based composites were 1% and 0.9%,respectively.