Enhancement of Mechanical Properties and Porosity of Concrete Using Steel Slag Coarse Aggregate

被引:40
|
作者
Miah, Md Jihad [1 ]
Patoary, Md Munir Hossain [1 ]
Paul, Suvash Chandra [2 ]
Babafemi, Adewumi John [3 ]
Panda, Biranchi [4 ]
机构
[1] Univ Asia Pacific, Dept Civil Engn, Dhaka 1205, Bangladesh
[2] Int Univ Business Agr & Technol, Dept Civil Engn, Dhaka 1230, Bangladesh
[3] Stellenbosch Univ, Dept Civil Engn, Private Bag X1, ZA-7602 Stellenbosch, South Africa
[4] Indian Inst Technol Guwahati, Dept Mech Engn, Gauhati 781039, Assam, India
关键词
steel slag aggregate; concrete; compressive and tensile strength; length change; porosity; HARDENED PROPERTIES; PERFORMANCE; STRENGTH; CEMENT; FRESH; WATER;
D O I
10.3390/ma13122865
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This paper investigates the possibility of utilizing steel slags produced in the steelmaking industry as an alternative to burnt clay brick aggregate (BA) in concrete. Within this context, physical, mechanical (i.e., compressive and splitting tensile strength), length change, and durability (porosity) tests were conducted on concrete made with nine different percentage replacements (0%, 10%, 20%, 30%, 40%, 50%, 60%, 80%, and 100% by volume of BA) of BA by induction of furnace steel slag aggregate (SSA). In addition, the chemical composition of aggregate through X-ray fluorescence (XRF) analysis and microstructural analysis through scanning electron microscopy (SEM) of aggregates and concrete were performed. The experimental results show that the physical and mechanical properties of concrete made with SSA were significantly higher than that of concrete made with BA. The compressive and tensile strength increased by 73% when SSA fully replaced BA. The expansion of concrete made with SSA was a bit higher than the concrete made with BA. Furthermore, a significant lower porosity was observed for concrete made with SSA than BA, which decreased by 40% for 100% SSA concrete than 100% BA concrete. The relation between compressive and tensile strength with the porosity of concrete mixes are in agreement with the relationships presented in the literature. This study demonstrates that SSA can be used as a full replacement of BA, which is economical, conserves the natural aggregate, and is sustainable building material since burning brick produces a lot of CO2.
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页数:19
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