Mechanical behaviour of micro-fine steel fibre reinforced sulphoaluminate cement composite

被引：26

作者：

Feng, Hu ^{[1
]}

Chen, Gang ^{[2
,3
]}

Hadi, Muhammad N. S. ^{[3
]}

Sheikh, M. Neaz ^{[3
]}

Zhou, Bowen ^{[4
]}

机构：

[1] Zhengzhou Univ, Sch Civil Engn, Zhengzhou 450001, Henan, Peoples R China

[2] Henan Univ Engn, Sch Civil Engn, Zhengzhou 451191, Henan, Peoples R China

[3] Univ Wollongong, Sch Civil Min & Environm Engn, Wollongong, NSW 2522, Australia

[4] Tongji Univ, Sch Civil Engn, Shanghai 200092, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 170卷

基金：

中国国家自然科学基金;

关键词：

Sulphoaluminate cement; Micro-fine steel fibres; Strength; Flexural toughness and ductility; PERFORMANCE;

D O I：

10.1016/j.conbuildmat.2018.03.065

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, a new cement-based composite with high early strength and toughness was developed by the addition of micro-fine steel fibre (MSF) in sulphoaluminate cement (SAC). The new composite is termed as MSF reinforced SAC composite (MSFRSC). The mechanical behaviour of MSFRSC was experimentally investigated, the flexural toughness and ductility of MSFRSC was evaluated. It was found that the compressive strength, flexural strength, shear strength, flexural toughness and ductility of MSFRSC were significantly influenced by the curing time and volume fraction of MSF. The compressive strength, flexural strength and shear strength of MSFRSC increased with the increase of curing time, especially during the first three days. The flexural strength and shear strength of MSFRSC improved significantly with the increase of the volume fraction of MSF. The flexural toughness of MSFRSC significantly improved and the ductility slightly improved with the increase of the volume fraction of MSF from 0.0% to 2.0%. The flexural toughness slightly increased and the ductility slightly decreased with the increase of the curing time from 1 day to 28 days. Also, the recommendations of different codes for the evaluation of the flexural toughness and ductility of MSFRSC were compared. The recommendations in ASTM C1609 fully reflected the flexural toughness and ductility of MSFRSC. The recommendations in JG/T 472-2015 distinguished the influence of MSF on the pre-peak and post-peak flexural load-deflection behaviours of MSFRSC. A simplified approach based on JG/T 472-2015 was proposed to evaluate the flexural ductility of MSFRSC. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：91 / 100

页数：10

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