Mechanical properties of alkali-activated slag lightweight aggregate concrete

被引：34

作者：

Chen, Pang ^{[1
]}

Shi, Zhaoyue ^{[1
]}

Cao, Shaojun ^{[1
]}

Liu, Ping ^{[1
]}

Rong, Xian ^{[1
]}

Wang, Lida ^{[1
]}

机构：

[1] Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin 300401, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2022年 / 359卷

基金：

中国国家自然科学基金;

关键词：

Alkali-activated slag concrete; Lightweight aggregate; Compressive strength; Splitting strength; Flexural strength; Microstructure; DRYING SHRINKAGE; STRENGTH; PERFORMANCE; MICROSTRUCTURE; FIBERS; CEMENT; BEHAVIOR; RATIO; ASH;

D O I：

10.1016/j.jclepro.2022.132136

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The mechanical properties of alkali-activated slag lightweight aggregate concrete (AAS-LWAC) were deep investigated. A total of 108 AAS-LWAC samples were prepared for compressive strength test, splitting tensile strength test, and flexural strength test. The microstructures of AAS-LWAC were characterised in depth using scanning electron microscopy (SEM). Compared with clay ceramsite and shale ceramsite as the lightweight aggregate (LWA), AAS-LWAC with fly ash ceramsite as the LWA exhibited the highest compressive strength. Besides, the compressive, splitting, and flexural strengths of AAS-LWAC decreased with increasing LWA content. Moreover, compared with polypropylene fibres and basalt fibres, steel fibres can significantly increase the compressive, splitting, and flexural strengths of AAS-LWAC, with an optimal volume content of 0.6% steel fibre. Furthermore, a modified formula for the variation in compressive strength of AAS-LWAC over time was proposed, considering the influence of LWA.

引用

页数：11

共 63 条

[1] Concrete blocks for thermal insulation in hot climate [J].

Al-Jabri, KS ;

Hago, AW ;

Al-Nuaimi, AS ;

Al-Saidy, AH .

CEMENT AND CONCRETE RESEARCH, 2005, 35 (08) :1472-1479

[2] Effect of initial curing on early strength and physical properties of a lightweight concrete [J].

Al-Khaiat, H ;

Haque, MN .

CEMENT AND CONCRETE RESEARCH, 1998, 28 (06) :859-866

[3]

[Anonymous], 2002, JGJ 51, Technical specification for lightweight aggregate concrete

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

Aslani, Farhad ;

Kelin, Jack .

JOURNAL OF CLEANER PRODUCTION, 2018, 200 :1009-1025

[5] Performance of an alkali-activated slag concrete reinforced with steel fibers [J].

Bernal, Susan ;

De Gutierrez, Ruby ;

Delvasto, Silvio ;

Rodriguez, Erich .

CONSTRUCTION AND BUILDING MATERIALS, 2010, 24 (02) :208-214

[6] Optimization of the type and amount of polypropylene fibres for preventing the spalling of lightweight concrete subjected to hydrocarbon fire [J].

Bilodeau, A ;

Kodur, VKR ;

Hoff, GC .

CEMENT & CONCRETE COMPOSITES, 2004, 26 (02) :163-174

[7] Mechanical properties of steel fibre reinforced lightweight concrete with pumice stone or expanded clay aggregates [J].

Campione, G ;

Miraglia, N ;

Papia, M .

MATERIALS AND STRUCTURES, 2001, 34 (238) :201-210

[8] Contribution of hybrid fibers on the properties of the high-strength lightweight concrete having good workability [J].

Chen, B ;

Liu, JY .

CEMENT AND CONCRETE RESEARCH, 2005, 35 (05) :913-917

[9] Effect of pore size distribution on drying shrinkage of alkali-activated slag concrete [J].

Collins, F ;

Sanjayan, JG .

CEMENT AND CONCRETE RESEARCH, 2000, 30 (09) :1401-1406

[10] A study of tensile and compressive properties of hybrid basalt-polypropylene fiber-reinforced concrete under uniaxial loads [J].

Deng, Zhiyun ;

Liu, Xinrong ;

Yang, Xin ;

Liang, Ninghui ;

Yan, Ru ;

Chen, Peng ;

Miao, Qingxu ;

Xu, Yihua .

STRUCTURAL CONCRETE, 2021, 22 (01) :396-409

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