摘要
通过抗折试验和抗折试验后小立方体抗压强度试验,探讨了纳米粒子掺量、聚乙烯醇(PVA)纤维掺量和石英砂粒径对水泥基复合材料抗折性能的影响。结果表明,纳米粒子掺量、PVA纤维体积掺量和石英砂粒径对水泥基复合材料抗折强度和抗折试验后小立方体抗压强度有较大影响。PVA纤维水泥基复合材料的抗折强度和小立方体抗压强度随着纳米Si O_2掺量增加呈先增大后减小的趋势,当纳米Si O_2掺量达到1.5%和1.0%时,抗折强度和抗压强度分别达到最大值;随着纤维体积掺量的增大,掺纳米Si O_2水泥基复合材料抗折强度和小立方体抗压强度逐渐增大,但当PVA纤维体积掺量超过0.6%时,小立方体抗压强度有逐渐降低的趋势;随着石英砂粒径的减小,抗折强度和小立方体抗压强度逐渐降低,采用粒径a石英砂配制的水泥基复合材料具有更高的抗折强度和小立方体抗压强度。
The effects of nano-particle content,volume dosage of polyviny alcohol(PVA)fiber and grain size of silica sand on flexural properties of cement based composites were discussed based on flexure test.The results show that the content of nano-particles,volume dosage of PVA fiber,and particle size of silica sand have great influence on the flexural strength and compressive strength of the small cube after flexure test of cement based composites.With the increase of the content of nano-particles,the flexural strength and compressive strength of the small cube increase firstly and then decrease gradually.When the content of nano-SiO 2 reaches 1.5%and 1.0%,the flexural strength and compressive strength of the small cube reaches the maximum,respectively.With the increase of volume dosage of PVA fiber,the flexural strength and compressive strength of the small cube has a tendency of increasing.While the compressive strength of the small cube begins decrease after the volume dosage of PVA fiber is in excess of 0.6%.With the decrease of particle size of silica sand,there is a tendency of decrease on the flexural strength and compressive strength of the small cube of cement based composites.The cement based composite produced by the silica sands with particle size a can exhibit higher flexural strength and compressive strength.
作者
张鹏
万进一
李晓英
梁全策
郭晓峰
ZHANG Peng;WAN Jin-yi;LI Xiao-ying;LIANG Quan-ce;GUO Xiao-feng(School of Water Conservancy and Environment,Zhengzhou University,Zhengzhou 450001,China;Changtong Road&Bridge Construction Co.,LTD.,Sanmenxia 472000,China)
出处
《科学技术与工程》
北大核心
2018年第7期234-238,共5页
Science Technology and Engineering
基金
国家自然科学基金(51678534)
河南省高校科技创新人才计划项目(16HASTIT012)
河南省教育厅科学技术研究重点项目(14A560005)
郑州大学优秀青年教师发展基金(1421323079)资助
