超细钢-聚丙烯混杂纤维混凝土力学性能研究

发布时间：2018-01-12 21:37

本文关键词：超细钢-聚丙烯混杂纤维混凝土力学性能研究　出处：《玻璃钢/复合材料》2016年12期 　论文类型：期刊论文

【摘要】：为研究超细钢-聚丙烯纤维对混凝土力学性能的影响,进行了9组超细钢-聚丙烯混杂纤维混凝土试件的立方体抗压强度和劈裂强度试验,分析了超细钢纤维、聚丙烯纤维体积掺量对混凝土力学性能的影响。结果表明:混杂纤维的掺入使混凝土的立方体抗压强度、劈裂强度及拉压比均有提高,混杂纤维混凝土破坏产生明显延性特征;超细钢纤维体积掺量对混凝土力学性能的影响最大,混凝土强度及拉压比随超细钢纤维掺量增加而增大;聚丙烯纤维体积掺量增加对混凝土力学性能的影响并非线性提高,混掺0.1%聚丙烯纤维和1.5%超细钢纤维的混凝土获得最佳力学性能,抗压强度提高19.42%,劈裂抗拉强度提高56.78%,拉压比提高30.16%。
[Abstract]:For the effect of polypropylene fiber on superfine steel on mechanical properties of concrete, the 9 groups of ultrafine steel polypropylene fiber concrete cube compressive strength and splitting strength test and analysis of the ultra-fine steel fiber, polypropylene fiber volume fraction on the mechanical properties of concrete. The results show that the hybrid fiber. The compressive strength, splitting strength and compressive strength were improved significantly the ductility of hybrid fiber concrete damage characteristics; influence of ultra-fine steel fiber volume fraction on the mechanical properties of concrete, concrete strength and tension compression ratio with ultra-fine steel fiber content increases; polypropylene fiber volume fraction increase on the mechanical properties of concrete and improve the nonlinear, mixed 0.1% 1.5% superfine polypropylene fiber and steel fiber concrete to obtain the best mechanical properties, compressive strength increased by 19.42%, The splitting tensile strength is increased by 56.78%, and the ratio of tension and pressure is increased by 30.16%.

【作者单位】：厦门理工学院土木工程与建筑学院;
【基金】：国家自然科学基金项目(51478404) 福建省科技厅青年创新项目(2016J05141) 福建省教育厅A类项目(JA14241) 厦门理工学院高层次人才项目(YKJ13029R)
【分类号】：TU528
【正文快照】： 混凝土是当今应用最广泛的建筑材料,但其抗弯、抗拉、抗冲击及韧性差等弱点限制了材料优势发挥[1]。长期以来,学者们不断尝试探索改善混凝土性能的方式,混杂纤维增强混凝土逐步成为近年的研究热点[2-4]。赵华等[5]采用单轴拉伸试验对聚乙烯和聚丙烯混杂纤维混凝土进行研究,并

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