Time dependence of corrosion resistance in belitic calcium sulfoaluminate (BCSA) cement concrete

IF 10.8 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2025-04-20 DOI:10.1016/j.cemconcomp.2025.106099

Tayyab Adnan , Éric P. Bescher , Robert J. Thomas

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Abstract

This paper studies the time dependence of corrosion resistance in belitic calcium sulfoaluminate (BCSA) cement concrete. BCSA is a hydraulic cement that sets rapidly and has a lower carbon footprint than portland cement (PC). Some studies suggest that BCSA concrete is highly susceptible to chloride-induced corrosion, but these claims are based on testing at 28 days. No later-age results have been reported. We confirm that BCSA cement concrete exhibits poor corrosion resistance when tested at 28 days, which can be attributed to an immature microstructure with weak resistance to chloride ingress and a pore solution that does not support passivation. We further show that corrosion resistance improves significantly as the BCSA system matures, achieving good corrosion resistance between 90 and 180 days. This improvement relates to the slow hydration of belite, which results in significant later-age microstructure refinement and probably alters the pore solution in a way that promotes or enhances steel passivation.

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贝氏岩型硫铝酸钙（BCSA）水泥混凝土耐蚀性的时间依赖性

研究了胆石质硫铝酸钙（BCSA）水泥混凝土耐腐蚀性能的时间依赖性。BCSA是一种水力水泥，凝结速度快，碳足迹比波特兰水泥（PC）低。一些研究表明，BCSA混凝土极易受到氯化物引起的腐蚀，但这些说法是基于28天的测试。没有关于后期结果的报道。我们确认BCSA水泥混凝土在28天的测试中表现出较差的耐腐蚀性，这可以归因于不成熟的微观结构，对氯化物进入的抵抗力较弱，孔隙溶液不支持钝化。我们进一步表明，随着BCSA体系的成熟，其耐腐蚀性显著提高，在90至180天内达到良好的耐腐蚀性。这种改善与白橄榄石的缓慢水化有关，这导致了后期组织的显著细化，并可能在某种程度上改变了孔隙溶液，促进或增强了钢的钝化。

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

Cement & concrete composites 工程技术-材料科学：复合

CiteScore

18.70

自引率

11.40%

发文量

459

审稿时长

65 days

期刊介绍： Cement & concrete composites focuses on advancements in cement-concrete composite technology and the production, use, and performance of cement-based construction materials. It covers a wide range of materials, including fiber-reinforced composites, polymer composites, ferrocement, and those incorporating special aggregates or waste materials. Major themes include microstructure, material properties, testing, durability, mechanics, modeling, design, fabrication, and practical applications. The journal welcomes papers on structural behavior, field studies, repair and maintenance, serviceability, and sustainability. It aims to enhance understanding, provide a platform for unconventional materials, promote low-cost energy-saving materials, and bridge the gap between materials science, engineering, and construction. Special issues on emerging topics are also published to encourage collaboration between materials scientists, engineers, designers, and fabricators.