The influence of steel fibre properties on the shrinkage of ultra-high performance fibre reinforced concrete

被引：55
|
作者：
Fang, Chengfeng [1 ]
Ali, Mohamed [1 ]
Xie, Tianyu [1 ]
Visintin, Phillip [1 ]
Sheikh, Abdul H. [1 ]
机构：
[1] Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, SA 5005, Australia
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 242卷
关键词：
Ultra-high performance fibre reinforced concrete (UHPFRC); Steel fibres; Autogenous shrinkage; Free total shrinkage; Fibre pull-out load-slip relationship; AUTOGENOUS SHRINKAGE; COMPRESSIVE BEHAVIOR; REDUCING ADMIXTURE; DRYING SHRINKAGE; STRESS; UHPFRC; CRACKING; PULLOUT; TENSILE; UHPC;
D O I：
10.1016/j.conbuildmat.2019.117993
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study, the effects of fibre volume fraction, fibre type, and aspect ratio on various shrinkages of the ultra-high performance fibre reinforced concretes (UHPFRCs) were experimentally investigated. Single fibre pull-out tests were conducted and the corresponding results were incorporated to explore the underlying mechanism governing the magnitudes of both autogenous and drying shrinkages. In general, the presence of randomly distributed steel fibres was found to reduce both the total and autogenous shrinkage, and more specifically, an increase in fibre volume fraction or fibre aspect ratio results in significant mitigation in both total and autogenous shrinkages. Hook-end fibres were found to be more effective in restraining autogenous shrinkage compared to straight fibres and consequently blended fibre mixes that include straight fibres were less effective at restraining shrinkage than only hooked-end fibres. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：10
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