Mechanical properties of alkali-activated slag lightweight aggregate concrete

被引：21

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

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