Microstructural changes in carbonation-cured slag-blended calcium sulfoaluminate cements under electrically accelerated leaching

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

Developments in the Built Environment Pub Date : 2025-04-01 DOI:10.1016/j.dibe.2025.100664

Jin-Ho Bae , Daeik Jang , Naru Kim , Jihoon Park , Sungsik Choi , Seonhyeok Kim , Joonho Seo

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Abstract

Microstructural changes in carbonation-cured slag-blended calcium sulfoaluminate (CSA) cements under electrically accelerated leaching were investigated in this study. The CSA cement was replaced with slag at mass levels of 0, 30, and 50 %. The paste samples underwent normal or carbonation curing for 28 d and were subsequently exposed to electrically accelerated leaching. The test results of the samples before and after the accelerated leaching test indicated significant decomposition of ettringite in the normally cured samples upon leaching, whereas the formation of ettringite was suppressed in the carbonation-cured samples. However, leaching caused a slight growth of ettringite in the carbonation-cured samples. The reactivities of belite and slag in the carbonation-cured samples increased significantly upon leaching, leading to an increase in C-(A)-S-H and strätlingite contents. Carbonation curing reduced the number of leached ions, and this reduction was more notable with the incorporation of slag.

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电加速浸出条件下碳化固化矿渣混合硫铝酸钙水泥的微观结构变化

研究了电加速浸出作用下碳化固化渣混合硫铝酸钙水泥的微观结构变化。在质量水平为0、30和50%时，用矿渣代替CSA水泥。膏体样品进行了28天的正常或碳化固化，随后暴露于电加速浸出。加速浸出前后样品的测试结果表明，正常固化样品浸出后钙矾石的分解明显，而碳化固化样品浸出后钙矾石的形成受到抑制。然而，浸出引起碳固化样品中钙矾石的轻微生长。浸出后碳化固化试样中白石和矿渣的反应活性显著提高，导致C-(A)- s - h和strätlingite含量增加。碳化固化降低了浸出离子的数量，并且随着炉渣的掺入，这种减少更为明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.