Mechanical properties of high performance concrete reinforced with basalt fiber and polypropylene fiber
Mechanical properties of high performance concrete reinforced with basalt fiber and polypropylene fiber
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玄武岩纤维和聚丙烯纤维增强高性能混凝土的力学性能
DOI：
10.1016/j.conbuildmat.2018.11.181
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发表时间：
2019-02-10
影响因子：
7.4
通讯作者：
Xu, Libin
中科院分区：
文献类型：
--
作者：
Wang, Dehong;Ju, Yanzhong;Xu, Libin
研究了玄武岩纤维和聚丙烯纤维增强高性能混凝土的力学性能。研究了玄武岩纤维、聚丙烯纤维以及不同掺量的混杂纤维对高性能混凝土抗压强度、抗折强度、劈裂抗拉强度和应力-应变曲线的影响。建立了混杂纤维高性能混凝土抗折强度的计算公式，提出了混杂纤维高性能混凝土抗折强度与立方体抗压强度的换算关系。在试验数据分析的基础上，推导了混杂纤维高性能混凝土受压应力-应变的数学表达式。试验结果表明，单掺玄武岩纤维和聚丙烯纤维的高性能混凝土强度均随纤维体积分数的增加而提高。但抗压强度略有提高，而抗折强度和劈裂抗拉强度有明显提高。当两种纤维同时掺入高性能混凝土中时，存在两种协同效应（正协同效应和负协同效应）。当玄武岩纤维含量为0.15%，聚丙烯纤维含量为0.033%时，纤维混合的协同效应最好。此时，与不掺纤维的高性能混凝土相比，抗压强度、抗折强度和劈裂抗拉强度分别提高了14.1%、22.8%和48.6%。(C)2018爱思唯尔有限公司版权所有
The mechanical properties of high performance concrete (HPC) reinforced with basalt fiber and polypropylene fibers were investigated in this study. The influence of single basalt fibers (BFs), single polypropylene fibers (PF) and hybrid fibers with different contents on the compressive strength, flexural strength, splitting tensile strength and stress-strain curve of HPC were investigated. A formula for calculating the flexural strength of hybrid fiber HPC was developed, and a conversion relationship between flexural strength and cube compressive strength was proposed. On the basis of experimental data analysis, the mathematical expression of the compressive stress-strain of hybrid fiber reinforced HPC was derived. Test results indicate that, the strength of HPC reinforced with single doped basalt fibers or polypropylene fibers increases with the increase of the fiber volume fraction. However, the compressive strength increases slightly, while the flexural strength and splitting tensile strength are improved significantly. When the two types of fibers are mixed into HPC simultaneously, there are two kinds of synergy effects (positive and negative synergy effects). When the basalt fiber content is 0.15% and polypropylene fiber content is 0.033%, the synergy effect of fiber mixing is the best. At this time, the compressive strength, flexural strength and splitting tensile strength increased by 14.1%, 22.8% and 48.6%, respectively, when compared with those of HPC without fibers. (C) 2018 Elsevier Ltd. All rights reserved.