纤维对聚苯颗粒混凝土力学性能影响的研究  

Effect of fiber on mechanical properties of polystyrene particle concrete

作　　者：于周平[1,2] 杨伟军[2] 黄登科 黄树鑫 YU Zhouping;YANG Weijun;HUANG Dengke;HUANG Shuxin(Yuanpei College,Shaoxing University,Shaoxing 312000,China;College of Civil Engineering,Changsha University of Science and Technology,Changsha 410076,China)

机构地区：[1]绍兴文理学院元培学院,浙江绍兴312000 [2]长沙理工大学土木工程学院,湖南长沙410076

出　　处：《混凝土》2022年第11期68-72,76,共6页Concrete

基　　金：国家自然科学基金(41572305);2019年度浙江省建设科研项目(2019K148);浙江省教育厅一般科研项目(Y201941058);浙江省大学生科技创新活动计划项目(2020R444033,2019R432008)。

摘　　要：为使废旧的布料纤维在聚苯颗粒(EPS)混凝土的工程结构中得到有效应用,研究了布料纤维对EPS混凝土力学性能的影响。试验测试了不同掺量的布料纤维(聚丙烯网状纤维、聚丙烯腈纤维、聚酯纤维)EPS混凝土抗压强度、劈裂抗拉强度及抗折强度,分析其微观结构。结果显示:混凝土的强度随着EPS替代率的增加而降低。聚酯纤维的掺入能有效提高EPS混凝土的抗压强度、劈裂抗拉强度及抗折强度。聚丙烯网状纤维、聚丙烯腈纤维可以提高EPS混凝土的劈裂抗拉强度及抗折强度,而对抗压强度均有所降低。聚酯纤维的掺量为1.6、1.3 kg/m^(3),其EPS混凝土的抗压强度和劈裂抗拉强度达到最大值,比对照组分别提高了16.67%、12.18%。EPS混凝土的抗折强度在聚丙烯网状纤维的掺量为1 kg/m^(3)取得最大值,高出对照组22.56%。In order to utilize the used fabric fibers effectively in the engineering structure of polybenzene particles(EPS)concrete,the effect of cloth fibers on the mechanical properties of EPS concrete is studied.The EPS concrete pressure strength,cracking resistance and fold strength of different doping amounts of cloth fiber(polypropylene mesh fiber,polypropylene acrylic fiber,polyester fiber)were tested,and its microstructure was analyzed.The results show that the strength of concrete decreases with the increase of EPS substitution rate.The mixing of polyester fiber can effectively improve the pressure strength,cracking and folding strength of EPS concrete.Polypropylene mesh fiber and polypropylene acrylic fiber can improve the cracking and folding strength of EPS concrete,while the anti-pressure strength is reduced.When polyester fiber was mixed with 1.6 kg/m^(3) and 1.3 kg/m^(3),the EPS concrete had the maximum pressure resistance and split resistance,which was 16.67%and 12.18%higher than that of the control group.When the folding strength of EPS concrete was the highest in polypropylene mesh fiber with 1 kg/m^(3),it was 22.56%higher than that of the control group.

关 键 词：聚苯颗粒混凝土 纤维 抗压强度 劈裂抗拉强度 抗折强度 微观结构 

分 类 号：TU528.041[建筑科学—建筑技术科学]