Workability, strength and microstructural properties of ground ferronickel slag blended fly ash geopolymer mortar

被引：24

作者：

Kuri, Jhutan Chandra ^{[1
,2
]}

Khan, Md. Nabi Newaz ^{[1
]}

Sarker, Prabir Kumar ^{[1
]}

机构：

[1] Curtin Univ, Sch Civil & Mech Engn, Perth, WA, Australia

[2] Chittagong Univ Engn & Technol CUET, Dept Civil Engn, Chittagong, Bangladesh

来源：

JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS | 2022年 / 11卷 / 02期

关键词：

compressive strength; fly ash; geopolymers; ground ferronickel slag; microstructure; workability; FINE AGGREGATE; MECHANICAL-PROPERTIES; COMPRESSIVE STRENGTH; SYNTHESIS PARAMETERS; TECHNOLOGY; POWDER; CONSTRUCTION; PERFORMANCE; REACTIVITY; CEMENT;

D O I：

10.1080/21650373.2020.1823905

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This study evaluated the effect of using ground ferronickel slag (GFNS) with fly ash (FA) to produce geopolymer mortar. Workability of mortar was found to decrease with the increase of GFNS content due to its angular shape. Compressive strength was found to maximize at GFNS content of 75%. The 28-day and 90-day compressive strengths of geopolymer mortar using 40% alkaline liquid were 75 and 96 MPa, respectively. The SEM images showed more compact microstructure of geopolymers using GFNS compared to that using 100% fly ash. The quantitative XRD results confirmed the production of amorphous geopolymer product. The energy dispersive X-ray spectra (EDS) revealed that the main reaction product of FA-GFNS geopolymer is sodium magnesium alumino-silicate hydrate (N-M-Al-Si-H) gel, which is provided the denser microstructure and the resulting strength increase by GFNS. The porosity and sorptivity of the mortar were found to decrease with the increase of GFNS.

引用

页码：107 / 124

页数：18

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