摘要
以绿色环保、经济实惠为出发点,为了研究废旧钢纤维、聚丙烯纤维和剑麻纤维对混凝土力学及耐久性能的影响以及其破坏形态,进行不同材料纤维混凝土的立方体抗压强度、劈裂抗拉强度与四点抗弯强度等基本力学性能试验,干湿循环、冻融循环等耐久性试验。结果表明:与普通混凝土相比,一定量的纤维可以有效提高混凝土的力学性能和耐久性并改善受压破坏形态。掺量0.5%的聚丙烯纤维对改善其力学性能效果最佳,其抗压强度、劈裂抗拉强度、抗折强度分别提高5.69%、10.34%、6.88%;掺量0.25%的剑麻纤维对改善耐久性效果最佳,既能降低干湿循坏导致的强度损失,也能降低冻融循环后的质量损失。
Starting from green environmental protection and economic affordability,in order to study the effects of waste steel fiber,polypropylene fiber and sisal fiber on the mechanical properties and durability of concrete as well as their failure forms,the cubic compressive strength,splitting tensile strength and four-point flexural strength of fiber concrete of different materials were tested,and the durability tests of dry-wet cycle and freeze-thaw cycle were carried out.The results show that,compared with ordinary concrete,a certain amount of fiber can effectively improve the mechanical properties and durability of concrete and improve the compression failure mode.The compressive strength,splitting tensile strength and bending strength of polypropylene fiber increased by 5.69%,10.34%and 6.88%,respectively.0.25%sisal fiber has the best effect on improving durability,which can not only reduce the strength loss caused by dry-wet cycling,but also reduce the quality loss after freeze-thaw cycle.
作者
姚远
赵华
袁维光
魏丞瑾
陈勇
YAO Yuan;ZHAO Hua;YUAN Weiguang;WEI Chengjin;CHEN Yong(China Railway Construction Group Co.,Ltd.;School of Environmental and Civil Engineering,Chengdu University of Technology;State Key Laboratory of Geological Hazard Control and Geological Environment Protection(Chengdu University of Technology))
出处
《广东建材》
2025年第6期5-8,共4页
Guangdong Building Materials
关键词
纤维混凝土
力学性能
耐久性能
Fiber reinforced concrete
Mechanical properties
Durability
