Non-sintered artificial aggregates made of ternary alkali-activated materials with natural carbonated MSWI fly ash incorporations

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2025-01-10 DOI:10.1016/j.dibe.2025.100603

Jing Gong , Mengmeng Wang , Guo Yang , Han Guo , Jie Yao , Yaxin Tao , Jing Zhong , Yubo Sun

{"title":"Non-sintered artificial aggregates made of ternary alkali-activated materials with natural carbonated MSWI fly ash incorporations","authors":"Jing Gong , Mengmeng Wang , Guo Yang , Han Guo , Jie Yao , Yaxin Tao , Jing Zhong , Yubo Sun","doi":"10.1016/j.dibe.2025.100603","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the utilization of municipal solid waste incineration (MSWI) fly ash (MFA) to produce non-sintered artificial aggregates (AAs) through alkali activation. To enhance its suitability, MFA underwent a six-month natural carbonation process to remove leachable salts and stabilize heavy metals, during which significant phase transformations were observed. The AAs were fabricated using ternary alkali-activated materials (AAMs) with varying MFA proportions through spray pelletization. Although higher MFA content reduced the strength of the AAs, this effect was counterbalanced by increasing the silicate modulus in the activators. The resulting AAs demonstrated mechanical strength comparable to or exceeding that of natural granite aggregates and recycled aggregates derived from concrete demolition waste. Furthermore, the study examined the reaction products and microstructural characteristics of the AAs. Leachate analysis confirmed compliance with environmental standards for heavy metal content, highlighting the potential of these AAs as a sustainable alternative aggregate resource for the construction industry.</div></div>","PeriodicalId":34137,"journal":{"name":"Developments in the Built Environment","volume":"21 ","pages":"Article 100603"},"PeriodicalIF":6.2000,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Developments in the Built Environment","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666165925000031","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

This study investigates the utilization of municipal solid waste incineration (MSWI) fly ash (MFA) to produce non-sintered artificial aggregates (AAs) through alkali activation. To enhance its suitability, MFA underwent a six-month natural carbonation process to remove leachable salts and stabilize heavy metals, during which significant phase transformations were observed. The AAs were fabricated using ternary alkali-activated materials (AAMs) with varying MFA proportions through spray pelletization. Although higher MFA content reduced the strength of the AAs, this effect was counterbalanced by increasing the silicate modulus in the activators. The resulting AAs demonstrated mechanical strength comparable to or exceeding that of natural granite aggregates and recycled aggregates derived from concrete demolition waste. Furthermore, the study examined the reaction products and microstructural characteristics of the AAs. Leachate analysis confirmed compliance with environmental standards for heavy metal content, highlighting the potential of these AAs as a sustainable alternative aggregate resource for the construction industry.

查看原文本刊更多论文

由三元碱活性材料与天然碳化MSWI粉煤灰掺入制成的非烧结人工骨料

研究了利用城市生活垃圾焚烧飞灰（MFA）碱活化制备非烧结人工骨料（AAs）的工艺。为了提高其适用性，MFA进行了为期6个月的自然碳化过程，以去除可浸出盐并稳定重金属，在此期间观察到明显的相变。以不同MFA比例的三元碱活性材料（AAMs）为原料，采用喷雾造粒法制备了AAs。虽然较高的MFA含量降低了AAs的强度，但这种影响可以通过增加活化剂中的硅酸盐模量来抵消。由此产生的AAs显示出与天然花岗岩骨料和从混凝土拆除废料中提取的再生骨料相当或超过的机械强度。此外，研究了反应产物和原子吸收剂的微观结构特征。渗滤液分析证实，这些污水处理厂符合重金属含量的环保标准，突显了这些污水处理厂作为建造业可持续替代综合资源的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.