Experimental study on crumb rubberised concrete (CRC) and reinforced CRC slabs under static and impact loads

IF 0.9 Q4 ENGINEERING, CIVIL Australian Journal of Structural Engineering Pub Date : 2020-08-25 DOI:10.1080/13287982.2020.1809811

Danda Li, Jianzhuang Xiao, Y. Zhuge, J. Mills, H. Senko, Xing Ma

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引用次数: 11

Abstract

ABSTRACT This paper addresses the structural performance of crumb rubberised concrete (CRC) and reinforced CRC slabs under static and low-velocity impact loads. An innovated setup was designed to investigate the impact of behaviour of concrete material based on the drop-weight test. The drop-weight velocities before and after impact were recorded through a laser system. Based on the velocity variation, the energy that was absorbed in concrete material during the test, which also was the impact resistance of the sample’s failure section, had been calculated. CRC samples with rubber percentages varying from 0% to 20% were tested. Experimental results verified the advantages of using rubber on material impact behaviour. Finally, as a structural application, reinforced CRC slabs were tested under static and impact loads. Experimental results showed that CRC slabs exhibited superior post-cracking performance with member moment capacities comparable or even higher than that of reinforced traditional concrete (TC) slabs. It is believed that this unique phenomenon was due to zip-shaped cracking section along CRC slab width. At last, a series of impact tests were conducted and test results showed a significant reduction in the peak stress response in CRC slabs when compared with TC slabs.

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碾碎橡胶混凝土及加筋橡胶混凝土板在静、冲击荷载作用下的试验研究

摘要本文研究了碎橡胶混凝土(CRC)和加筋CRC板在静态和低速冲击荷载作用下的结构性能。设计了一种创新的装置来研究基于落锤试验的混凝土材料的行为的影响。通过激光系统记录了撞击前后的落锤速度。根据速度变化，计算了试验过程中混凝土材料吸收的能量，即试样破坏截面的抗冲击能力。测试了橡胶含量从0%到20%不等的CRC样品。实验结果验证了使用橡胶对材料冲击性能的优越性。最后，作为一种结构应用，对加筋CRC板进行了静载荷和冲击载荷试验。试验结果表明，CRC板具有较好的开裂后性能，其构件弯矩承载力与传统钢筋混凝土板相当甚至更高。认为这种独特的现象是由于沿CRC板宽度出现拉链状开裂。最后进行了一系列冲击试验，试验结果表明，CRC板的峰值应力响应比TC板明显降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Australian Journal of Structural Engineering ENGINEERING, CIVIL-

CiteScore

2.50

自引率

0.00%

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期刊介绍： The Australian Journal of Structural Engineering (AJSE) is published under the auspices of the Structural College Board of Engineers Australia. It fulfils part of the Board''s mission for Continuing Professional Development. The journal also offers a means for exchange and interaction of scientific and professional issues and technical developments. The journal is open to members and non-members of Engineers Australia. Original papers on research and development (Technical Papers) and professional matters and achievements (Professional Papers) in all areas relevant to the science, art and practice of structural engineering are considered for possible publication. All papers and technical notes are peer-reviewed. The fundamental criterion for acceptance for publication is the intellectual and professional value of the contribution. Occasionally, papers previously published in essentially the same form elsewhere may be considered for publication. In this case acknowledgement to prior publication must be included in a footnote on page one of the manuscript. These papers are peer-reviewed as new submissions. The length of acceptable contributions typically should not exceed 4,000 to 5,000 word equivalents. Longer manuscripts may be considered at the discretion of the Editor. Technical Notes typically should not exceed about 1,000 word equivalents. Discussions on a Paper or Note published in the AJSE are welcomed. Discussions must address significant matters related to the content of a Paper or Technical Note and may include supplementary and critical comments and questions regarding content.