Effects of steel fiber length and coarse aggregate maximum size on mechanical properties of steel fiber reinforced concrete

被引：119

作者：

Han, Juhong ^{[1
]}

Zhao, Mengmeng ^{[2
]}

Chen, Jingyu ^{[3
]}

Lan, Xiaofang ^{[1
]}

机构：

[1] Zhengzhou Univ, Sch Water Conservancy & Environm Engn, Zhengzhou 450001, Henan, Peoples R China

[2] Luoyang Vocat Coll Sci & Technol, Coll Int Finance, Luoyang 471822, Peoples R China

[3] Dalian Univ Technol, Fac Infrastruct Engn, State Key Lab Coastal & Offshore Engn, Dalian 116023, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 209卷

基金：

中国国家自然科学基金;

关键词：

Steel fiber reinforced concrete; Steel fiber length; Coarse aggregate maximum size; Flexural performances; Fracture characteristics; FLEXURAL BEHAVIOR; FRACTURE ENERGY; PERFORMANCE; RATIO;

D O I：

10.1016/j.conbuildmat.2019.03.086

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study investigated the effects of steel fiber length and coarse aggregate maximum size on mechanical properties of steel fiber reinforced concrete (SFRC). The experimental results show that the mixture slump, splitting tensile strength, flexural strength, initial flexural toughness ratio, flexural toughness ratio, fracture energy and unstable fracture toughness of SFRC increase as steel fiber length increases. The compressive strength and initial fracture toughness are barely influenced by steel fiber length. With the increase of coarse aggregate maximum size, (a) the mixture slump increases, (b) compressive strength shows slight variations, (c) splitting tensile strength, flexural strength, fracture energy and unstable fracture toughness increase first and then decrease, (d) there are none indicative variations for initial flexural toughness ratio, flexural toughness ratio and initial fracture toughness. The rational range of the ratio of steel fiber length to coarse aggregate maximum size is 1.25-3 for the considerable strengthening effect of steel fiber on splitting tensile strength and flexural performances of concrete and 1-4 for that on fracture characteristics respectively. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：577 / 591

页数：15

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