纳米粒子和钢纤维增强混凝土抗碳化和抗渗性能

发布时间：2018-05-18 22:17

本文选题：纳米SiO + 钢纤维混凝土　；参考：《土木工程与管理学报》2017年02期

【摘要】：为探明纳米粒子和钢纤维对混凝土抗碳化性能和抗渗性的影响,采用混凝土渗水高度试验法测得了抗渗试件在压力水作用下的渗水高度,并对试件进行了3,7,14 d,28 d碳化试验,测得了试件相应龄期的碳化深度。纳米粒子的掺量分别为1%,3%,5%,7%,9%,钢纤维体积掺量分别为0.5%,1%,1.5%,2%,2.5%。试验结果表明:纳米SiO_2在一定掺量范围内可以提高混凝土的抗碳化性能,但过量就会对混凝土抗碳化性能产生不利影响;随着纳米SiO_2掺量的增加,混凝土的抗渗透性能先增强后降低;掺入适量钢纤维可以提高纳米混凝土的抗碳化性能,但过量的钢纤维会降低纳米混凝土的抗碳化性能;掺入钢纤维会降低纳米混凝土的抗渗性能。
[Abstract]:In order to find out the effect of nano-particles and steel fibers on the carbonation resistance and impermeability of concrete, the percolation height of impermeable specimens under pressure water was measured by using the method of percolation height test of concrete, and the carbonation test was carried out on the specimens for 37,14 days for 28 days. The carbonation depth of the specimen at the corresponding age was measured. The volume of the steel fiber is 0.5 and the volume of the steel fiber is 0.5, and the volume of the steel fiber is 0.5 and 1.5, respectively. The experimental results show that the carbonation resistance of concrete can be improved by nanometer SiO_2 in a certain range, but too much will have an adverse effect on the carbonation resistance of concrete. The anti-permeability of concrete is first enhanced and then reduced, and the carbonation resistance of nano-concrete can be improved by adding appropriate amount of steel fiber, but the carbonation resistance of nano-concrete can be reduced by excessive steel fiber. The anti-seepage property of nano-concrete can be reduced by adding steel fiber.
【作者单位】：郑州大学水利与环境学院;
【基金】：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项目(1421323079)
【分类号】：TU528.572

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