Effect of steel slag on pores and strength of fly-ash-based adsorbent geopolymers

IF 1.5 4区工程技术 Q3 ENGINEERING, CIVIL Proceedings of the Institution of Civil Engineers-Engineering Sustainability Pub Date : 2023-06-27 DOI:10.1680/jensu.22.10006

Lian Zhou, Yang Jiang, Jiaqing Wang, Zhiyuan Shao, Yang Luo, Binbin Qian, Yanbo Li, Jun Zang, Hong Wang, B. Ma, Yueyang Hu

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引用次数: 1

Abstract

A study was undertaken into the preparation and properties of fly-ash-based geopolymers that can be used to make multistage-pore materials able to adsorb gases such as carbon dioxide. The influence of steel slag on the mechanical properties and microstructure of the final precursor products was investigated and characterised by mechanical strength tests, X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry–differential thermal analysis, scanning electron microscopy–energy-dispersive X-ray spectroscopy and mercury intrusion porosimetry. The results showed that a low dose of steel slag significantly promoted the early compressive strength of a multistage-pore geopolymer. However, when the slag dose reached 30%, the strength decreased dramatically. The pore classification effect was more obvious when the capillary pores in the geopolymer disappeared and the pores mainly existed in the form of gel pores and voids.

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钢渣对粉煤灰基吸附剂地聚合物孔隙和强度的影响

对粉煤灰基地聚合物的制备和性能进行了研究，该聚合物可用于制造能够吸附二氧化碳等气体的多级孔隙材料。采用机械强度测试、x射线衍射、傅里叶变换红外光谱、热重-差热分析、扫描电镜-能量色散x射线能谱和压汞孔隙度法研究了钢渣对最终前驱体产品力学性能和微观结构的影响。结果表明:低剂量钢渣显著提高了多级孔隙地聚合物的早期抗压强度;当掺量达到30%时，强度急剧下降。当地聚合物中的毛细孔隙消失，孔隙主要以凝胶孔和空隙的形式存在时，孔隙分类效果更为明显。

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来源期刊

Proceedings of the Institution of Civil Engineers-Engineering Sustainability ENGINEERING, CIVIL-ENGINEERING, CIVIL

CiteScore

3.70

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Engineering Sustainability provides a forum for sharing the latest thinking from research and practice, and increasingly is presenting the ''how to'' of engineering a resilient future. The journal features refereed papers and shorter articles relating to the pursuit and implementation of sustainability principles through engineering planning, design and application. The tensions between and integration of social, economic and environmental considerations within such schemes are of particular relevance. Methodologies for assessing sustainability, policy issues, education and corporate responsibility will also be included. The aims will be met primarily by providing papers and briefing notes (including case histories and best practice guidance) of use to decision-makers, practitioners, researchers and students.