建筑和爆破垃圾再生陶瓷骨料的碱活化研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-09-15 DOI:10.3989/mc.2020.13619

N. Gaibor, J. Coelho, D. Leitão, T. Miranda, P. Tavares, N. Cristelo

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引用次数: 7

摘要

环境问题在世界范围内变得越来越重要，因此迫切需要在工业部门寻找新的可持续替代品。本研究评估了拆除作业产生的陶瓷残渣(CR)的基本特性，特别是地板和墙砖以及卫生洁具家具，以便进一步纳入建筑部门，即碱活化粘合剂，与其他更知名的前体-粉煤灰(FA)和钢包炉渣(LFS)混合。采用单轴抗压强度(UCS)、扫描电镜(SEM)、x射线能量色散分析仪(EDX)、x射线衍射仪(XRD)和傅里叶变换红外光谱(FTIR)等力学性能和微观结构分析方法，对不同CR/FA和CR/LFS重量比进行了力学性能分析。结果表明，经水玻璃活化后，CR与FA或LFS复合，固化90 d后的UCS值分别大于20 MPa和59 MPa。

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Alkali activation of recycled ceramic aggregates from construction and demolition wastes

Environmental concerns are becoming increasingly more significant worldwide, thus creating the urgent need for new sustainable alternatives in the industrial sector. The present study assesses the fundamental properties of ceramic residue (CR) originated by demolition operations, specifically, the floor and wall tiles and sanitaryware furniture, for further incorporation in the construction sector, namely in alkali-activated binders, mixed with other better-known precursors - fly ash (FA) and ladle furnace slag (LFS). Different CR/FA and CR/LFS weight ratios were considered and analyzed by mechanical behavior and microstructural analysis, which included uniaxial compression strength (UCS) tests, Scanning Electron Microscopy (SEM), X-ray Energy Dispersive Analyser (EDX), X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). Results obtained showed that the combination of CR and FA or LFS, activated with sodium silicate, produced UCS values higher than 20 MPa and 59 MPa, respectively, after 90 days curing.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.