高掺量合成纤维混凝土力学性能研究  

Mechanical Properties of Synthetic Fiber Reinforced Concrete with High Fiber Volume Fraction

作　　者：童伟光[1] 王鹏[1] 村上圣 

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]熊本大学大学院自然科学研究科

出　　处：《武汉理工大学学报》2012年第10期86-90,共5页Journal of Wuhan University of Technology

基　　金：教育部留学回国人员科研启动基金(教外司留(2008)890号);广西大学科研基金(X071002)

摘　　要：为研究高掺量下合成纤维混凝土的力学性能,在0～3%纤维体积率(Vf)范围内,对4种合成纤维混凝土进行了试验研究,并与钢纤维混凝土进行对比。结果表明:随着Vf增大,混凝土抗压强度、弹性模量降低,但降幅不大,使用粗纤维对保证混凝土抗压强度和弹性模量更有利。劈拉强度、抗弯强度和抗弯韧性随Vf增大而增大,细纤维在应用时掺量不宜过高,否则会引起增强效率降低。束状纤维和粗纤维在高掺量下分散性和增强效果良好,Vf在3%以上仍具有进一步提高混凝土力学性能的可能。高强度高弹性模量合成纤维对混凝土劈拉、抗弯强度具有与钢纤维同等的增强效应。This paper presents the results of an experimental investigation on the mechanical properties of synthetic fiber reinforced concrete with fiber volume fraction（Vf）from 0 to 3%.It was found that the compressive strength and elastic modulus decrease with the increase of Vf,the compressive strength is not sensitive to Vf when using macro fiber.The spliting tensile strength,flexural strength and flexural toughness increase with the increase of Vf.The enhancing effect of micro fiber is great in Vf of 1%,but grows slightly in higher Vf.The fascicular fiber shows better enhancing effect in high Vf,it might be applied to improve the mechanical properties of concrete even Vf more than 3%.The enhancing effect of high strength and modulus synthetic fiber on spliting tensile strength and flexural strength of concrete is similiar to steel fibre.

关 键 词：高掺量 纤维混凝土 力学性能 合成纤维 增强效应 

分 类 号：TU528.572[建筑科学—建筑技术科学]