Performance of recycled aggregate concrete using copper slag as fine aggregate

被引:25
作者
Sahu, Anasuya [1 ]
Kumar, Sanjay [1 ]
Srivastava, A. K. L. [1 ]
Pratap, Bheem [1 ]
机构
[1] Natl Inst Technol, Dept Civil Engn, Jamshedpur 831014, Jharkhand, India
关键词
Recycled aggregate concrete; Copper slag; Mechanical properties; Durability properties; Microstructure; SELF-COMPACTING CONCRETE; MECHANICAL-PROPERTIES; COARSE AGGREGATE; DURABILITY; STRENGTH; WASTE;
D O I
10.1016/j.jobe.2023.108364
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The present study experimentally investigates the mechanical and durability performance of re-cycled aggregate concrete (RAC) incorporating copper slag as fine aggregate. The coarse aggre-gate obtained from recycling of construction waste is used as natural coarse aggregate and copper slag, the industrial by-product is used as fine aggregate in the current research work. Recycled ag-gregate concrete formed by substituting 50 % recycled aggregate as natural coarse aggregate is considered as the control mix for this experimental work. A total of seven RAC mixtures are made with copper slag as a substitution of fine aggregate of varying proportions (0%-100 %) giving an increment of 20 %. Compressive strength, split tensile strength, and microstructural behaviour of RAC mixtures were carried out for up to 90 days of curing to assess the mechanical property of RAC mixes. To evaluate the effect of copper slag on long-term properties of RAC mix water ab-sorption, rapid chloride permeability and resistant to sulphate attack test is carried out for up to 90 days. The findings revealed that the mechanical properties of RAC mixes are improved up to 40 % substitution of copper slag. When exposed to sulphate, RAC mixtures gained weight while losing compressive strength. Results of water absorption and RCPT test showed a remarkable im-provement with the incorporation of copper slag up to 40 %; beyond that point, the results were comparable to RAC mix (control). The progression of calcium silicate hydrate gel formation within the RAC blend was verified through scanning electron microscopy, energy dispersive spec-troscopy, and X-ray diffraction analysis across a range of curing periods spanning from 7 to 90 days.
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页数:17
相关论文
共 51 条
[1]   Influence of self-healing, mixing method and adding silica fume on mechanical properties of recycled aggregates concrete [J].
Abd Elhakam, Ali ;
Mohamed, Abd Elmoaty ;
Awad, Eslam .
CONSTRUCTION AND BUILDING MATERIALS, 2012, 35 :421-427
[2]   Effect of copper slag as a fine aggregate on the properties of cement mortars and concrete [J].
Al-Jabri, Khalifa S. ;
Al-Saidy, Abdullah H. ;
Taha, Ramzi .
CONSTRUCTION AND BUILDING MATERIALS, 2011, 25 (02) :933-938
[3]   Copper slag as sand replacement for high performance concrete [J].
Al-Jabri, Khalifa S. ;
Hisada, Makoto ;
Al-Oraimi, Salem K. ;
Al-Saidy, Abdullah H. .
CEMENT & CONCRETE COMPOSITES, 2009, 31 (07) :483-488
[4]   Studies on ultra high performance concrete incorporating copper slag as fine aggregate [J].
Ambily, P. S. ;
Umarani, C. ;
Ravisankar, K. ;
Prem, Prabhat Ranjan ;
Bharatkumar, B. H. ;
Iyer, Nagesh R. .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 77 :233-240
[5]   Physico-mechanical properties and micromorphology of AAS mortars containing copper slag as fine aggregate at elevated temperature [J].
Ameri, Farshad ;
Shoaei, Parham ;
Zahedi, Mehdi ;
Karimzadeh, Misagh ;
Musaeei, Hamid Reza ;
Cheah, Chee Ban .
JOURNAL OF BUILDING ENGINEERING, 2021, 39
[6]   Steel fibre-reinforced high-strength concrete incorporating copper slag: Mechanical, gamma-ray shielding, impact resistance, and microstructural characteristics [J].
Ameri, Farshad ;
de Brito, Jorge ;
Madhkhan, Morteza ;
Taheri, Ramezan Ali .
JOURNAL OF BUILDING ENGINEERING, 2020, 29
[7]  
[Anonymous], 2019, IS 10262, P1
[8]  
[Anonymous], 1999, [No title captured], P1
[9]  
[Anonymous], 1987, IS-12269
[10]  
[Anonymous], 1970, Indian Stand, P1