Influence of silica fume and polypropylene fiber on fracture properties of concrete composite containing fly ash

Author:

Zhang Peng1,Li Qingfu1,Sun Zhenhua1

Affiliation:

1. School of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou, PR China.

Abstract

A parametric experimental study has been conducted to investigate the effect of silica fume and polypropylene fiber on the fracture properties of concrete composite. By means of three-point bending method, the fracture toughness, fracture energy, effective crack length, maximum mid-span deflection, critical crack-opening displacement, and maximum crack-opening displacement of the specimen were measured, respectively, and the relational curves between the vertical load and the mid-span deflection ( Pv– δ), crack mouth-opening displacement ( Pv–CMOD), and crack tip-opening displacement ( Pv–CTOD) were obtained. The results indicate that silica fume and polypropylene fiber both have great effect on the fracture parameters and relational curves of the three-point bending beam specimen. When the content of silica fume increases from 0% to 3%, and the fiber volume fraction increases from 0% to 0.12%, the fracture parameters gradually increase and the fracture relational curves become plumper and plumper with the increase of silica fume content and fiber volume fraction, respectively. However, the fracture parameters begin to decrease and the curves become thinner and thinner after the silica fume content exceeds 3%. It seems that the silica fume contributed well to the improvement of fracture property of concrete composite only when its fume content does not exceed 3%. Furthermore, the capability of polypropylene fiber to resist crack propagation of concrete composite containing fly ash and silica fume appears to become stronger and stronger with the increase of fiber volume fraction with the fiber volume fraction not beyond 0.12%.

Publisher

SAGE Publications

Subject

Materials Chemistry,Polymers and Plastics,Mechanical Engineering,Mechanics of Materials,Ceramics and Composites

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3