期刊论文

Effect of fiber type on compressive strength and flexural toughness of concrete and analysis of variability

中文

土木与环境工程学报(中英文)

2096-6717

2019

41

2

147-158

10.11835/j.issn.2096-6717.2019.041

51778069:国家自然科学基金 2015CB057700:国家重点基础研究发展计划（973计划） CX2016B386:湖南省研究生科研创新项目 16BCX01:实验室开放基金

本校为第一机构

为研究单掺钢纤维、聚丙烯纤维和纤维素纤维对混凝土抗压强度及弯曲韧性的影响,在不同体积掺量下进行了混凝土试块的抗压强度及弯曲韧性试验,并对试验结果进行了变异性分析.试验结果表明:3种纤维混凝土抗压强度较素混凝土平均提高26.7％、6.1％和11.1％;二次抗压强度保持率分别达77.0％、45.7％和58.0％;抗弯承载力最大分别提高31.6％、3.5％和14.0％;基于荷载-挠度曲线、Newkumar法及弯拉应力-应变曲线分别计算的弯曲韧性指数I20、Newkumar指标PCSm和韧度比Rx分别为素混凝土的4.2、3.1、2.6倍,19.9、9.8、6.9倍和4.0、3.4、2.7倍.变异性分析结果表明,掺入纤维后混凝土的抗压强度变异性小于弯曲...

This paper aims to study the effect of single-doped steel fiber,monofilament polypropylene fiber and cellulose fiber on compressive strength and flexural toughness of concrete.The compressive strength and flexural toughness of concrete specimens were firstly tested under different volume fraction of fibers, and the variability of test results was then analyzed.The test results show that the compressive strength of the three kinds fiber reinforced concrete are 26.7%,6.1%and 11.1%higher than that of normal concrete respectively.The average retention tate of secondary compressive strength are 77....