Assessment and development of high-performance fibre-reinforced lightweight self-compacting concrete including recycled crumb rubber aggregates exposed to elevated temperatures

被引:144
作者
Aslani, Farhad [1 ,2 ]
Kelin, Jack [1 ]
机构
[1] Univ Western Australia, Sch Civil Environm & Min Engn, Crawley, WA 6009, Australia
[2] Edith Cowan Univ, Sch Engn, Joondalup, WA 6027, Australia
关键词
Self-compacting concrete (SCC); Self-compacting rubberized concrete (SCRC); Fibre reinforced self-compacting concrete (FRSCC); Fire; Elevated temperatures; Spalling; Mass loss; MECHANICAL-PROPERTIES; COMPRESSIVE BEHAVIOR; FRESH PROPERTIES; STEEL FIBER; STRENGTH;
D O I
10.1016/j.jclepro.2018.07.323
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Recycled crumb rubber is a material created by grinding and commutating used tyres. There is no doubt that the increasing piles of tyres create environmental concerns. The long term goal of this paper is to find a means to dispose of the crumb rubber in lightweight self-compacting concrete (SCC) and still provide a final product with good engineering properties. This paper has considered replacement of natural normal-weight aggregates with crumb rubber aggregates and lightweight scoria aggregate together with the addition of macro fibres which provides a sustainable alternative which assists in minimizing the environmental damages associated with the disposal of waste tyres. Also, the purpose of this study is to determine the effect of fibres on fresh and mechanical properties in additional to the performance of the concrete after exposure to elevated temperatures. Investigation has been performed after concrete exposure to both room and elevated temperatures. Fibre reinforcement were added to a control mix containing 80% replacement of traditional coarse aggregate with lightweight scoria aggregate and 20% replacement of traditional fine aggregate with crumb rubber aggregate. Steel and polypropylene (PP) fibres were explored so as to ascertain the benefits each fibre can provide through a range of temperatures. Nine mixes were prepared; a control mix and four mixes per each fibre with increasing fibre addition. Chemical admixture dosages were adjusted so as to achieve the desired slump flow. Experimental program investigated the fresh properties of the SCC through slump flow, slump flow T500 and J-ring tests. Mechanical properties were investigated after 28 days curing, standard 100 x 200 mm cylinder specimens were subjected to compressive and indirect tensile tests after exposure to 25, 100, 300, 600 and 900 degrees C. Compiled results will be compared to those of the control mix. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1009 / 1025
页数:17
相关论文
共 50 条
[1]  
Al Qadi A.N., 2014, J. King Saud Univ.-Eng. Sci, V26, P33, DOI [10.1016/j.jksues.2012.12.002, DOI 10.1016/J.JKSUES.2012.12.002]
[2]  
[Anonymous], 1998, 1012121 AS
[3]  
[Anonymous], 1997, 101217 AS
[4]  
[Anonymous], C1240 ASTM
[5]  
[Anonymous], 1998, 2758 AS
[6]  
[Anonymous], 101210 AS
[7]  
[Anonymous], 1994, AS35823
[8]  
[Anonymous], 834 ISO BRIT STAND 1
[9]  
[Anonymous], 2001, 3582 AS
[10]  
[Anonymous], AS101214 AS