粉煤灰综合利用 FLY ASH COMPREHENSIVE UTILIZATION 2018no.4 试验与应用 PVA纤维对水泥基复合材料流动性能及力学性能的影响 Effect PVA Fibers on the Flow and Mechanical Properties of Cement-based Composites 殷康蜓,孙海燕,龚爱民,赵定柱 (云南农业大学水利水电学院,昆明650201) 摘要:研究三种长径比及三种不同体积掺量的PVA纤维对水泥基复合材料流动性能和力学性能的影响。结果表 明:随纤维体积掺量的增加,各组胶砂拌合物的调桌流动度数值均呈现出逐渐下降的变化趋势,在相同体积掺量下,直 径31μm、长度6mm的纤维对拌合物流动性影响更显著一些;为使得胶砂拌合物具有较好的工作性,可振捣成型密实, 将PVA纤维体积掺量控制在0.4%以内作为适宜的纤维体积掺量范围;随龄期的增长,三种规格纤维对水泥基复合材料 的抗折强度、抗压强度均随纤维体积掺量的增加而增加,且PVA纤维对水泥基复合材料抗折强度的影响较其抗压强度显 著,直径40μm、长度12mm的纤维较其他两种规格的纤维不仅能显著改善水泥基复合材料的早期强度,且对其后期强 度的发展也很有利。 关键词:PVA纤维;长径比;体积掺量;调桌流动度;抗折强度 中图分类号:TV431+3 文献标识码:A 文章编号:1005-8249(2018)04-0019-04 Yin Kangting ,Sun Haiyan ,Gong Aimin ,Zhao Dingzhu ( Schoolof water conservancy and Hydropower Engineering ,Yunnan Agricultural University ,Kunming ,650201 ) Abstract :The effects of three kinds of PVA fibers with long diameter ratio and three different volume contents on the flow and mechanical properties of cement-based posites were studied .The results show that with the increase of the volume of fiber volume ,the flow degree of the mixing table in each group shows a gradual decreasing trend .Under the same volume ,the fiber with the diameter of 31 m and the len...
PVA纤维对水泥基复合材料流动性能及力学性能的影响.pdf
