干旱区生态环境知识资源中心(Arid): Performance of Steel Fiber-Reinforced Alkali-Activated Slag-Fly Ash Blended Concrete Incorporating Recycled Concrete Aggregates and Dune Sand

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DOI	10.3390/buildings11080327
	Performance of Steel Fiber-Reinforced Alkali-Activated Slag-Fly Ash Blended Concrete Incorporating Recycled Concrete Aggregates and Dune Sand
	El-Hassan, Hilal; Hussein, Abdalla; Medljy, Jamal; El-Maaddawy, Tamer
通讯作者	El-Hassan, H (corresponding author), UAE Univ, Dept Civil & Environm Engn, Al Ain 15551, U Arab Emirates.
来源期刊	BUILDINGS
EISSN	2075-5309
出版年	2021
卷号	11 期号:8
英文摘要	This study evaluates the performance of alkali-activated slag-fly ash blended concrete made with recycled concrete aggregates (RCA) and reinforced with steel fibers. Two blends of concrete with ground granulated blast furnace slag-to-fly ash ratios of 3:1 and 1:1 were used. Natural aggregates were substituted with RCA, while macro steel fibers with 35 mm of length and aspect ratio of 65 were incorporated in RCA-based mixtures at various volume fractions. Fine aggregates were in the form of desert dune sand. Mechanical and durability characteristics were investigated. Experimental results revealed that RCA replacement decreased the compressive strength of plain concrete mixtures with more pronounced reductions being perceived at higher replacement percentages. Mixtures made with 30%, 70%, and 100% RCA could be produced with limited loss in the design compressive strength upon incorporating 1%, 2%, and 2% steel fibers, by volume, respectively. In turn, splitting tensile strength was comparable to the NA-based control while adding at least 1% steel fiber, by volume. Moreover, higher water absorption and capillary sorptivity and lower ultrasonic pulse velocity, bulk resistivity, and abrasion resistance were reported during RCA replacement. Meanwhile, incorporation of steel fibers densified the concrete and enhanced its resistance to abrasive forces, water permeation, and water transport. Analytical regression models were developed to correlate hardened concrete properties to the 28-day cylinder compressive strength.
英文关键词	alkali-activated concrete slag fly ash steel fibers dune sand recycled concrete aggregate hardened properties analytical regression model
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000688917600001
WOS关键词	BLAST-FURNACE SLAG ; MECHANICAL-PROPERTIES ; GEOPOLYMER CONCRETE ; COARSE AGGREGATE ; DURABILITY PROPERTIES ; DEMOLITION WASTE ; MICROSTRUCTURE ; STRENGTH ; WORKABILITY ; BEHAVIOR
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS研究方向	Construction & Building Technology ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362750
作者单位	[El-Hassan, Hilal; Hussein, Abdalla; Medljy, Jamal; El-Maaddawy, Tamer] UAE Univ, Dept Civil & Environm Engn, Al Ain 15551, U Arab Emirates
推荐引用方式 GB/T 7714	El-Hassan, Hilal,Hussein, Abdalla,Medljy, Jamal,et al. Performance of Steel Fiber-Reinforced Alkali-Activated Slag-Fly Ash Blended Concrete Incorporating Recycled Concrete Aggregates and Dune Sand[J],2021,11(8).
APA	El-Hassan, Hilal,Hussein, Abdalla,Medljy, Jamal,&El-Maaddawy, Tamer.(2021).Performance of Steel Fiber-Reinforced Alkali-Activated Slag-Fly Ash Blended Concrete Incorporating Recycled Concrete Aggregates and Dune Sand.BUILDINGS,11(8).
MLA	El-Hassan, Hilal,et al."Performance of Steel Fiber-Reinforced Alkali-Activated Slag-Fly Ash Blended Concrete Incorporating Recycled Concrete Aggregates and Dune Sand".BUILDINGS 11.8(2021).