植酸对增强低碳砂浆的双重作用：赤泥脱钾和提高其耐蚀性

IF 13.1 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Cement & concrete composites Pub Date : 2025-08-05 DOI:10.1016/j.cemconcomp.2025.106274

Xiaocheng Zhou, Zhi Geng, Jinjie Shi

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引用次数: 0

摘要

在混凝土生产中，用赤泥（RM）部分替代普通波特兰水泥（OPC）具有环保和低碳效益，同时提高了钢材的耐腐蚀性。然而，为了降低混凝土中碱骨料反应（AAR）的风险，RM需要脱碱预处理，特别是当涉及到大取代比时。植酸（PA）是一种酸性有机缓蚀剂，在有效降低RM的碱度方面表现出良好的前景。本研究探讨了PA在作为OPC替代品掺入增强砂浆之前对RM进行脱碱处理的方法。除PA能有效脱钾外，PA和RM在提高砂浆中预埋钢的耐蚀性方面也有协同作用。此外，对这种协同抑制提出了一个可行的解释，强调了PA和RM在保护钢免受氯化物诱导腐蚀方面的联合作用。

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Dual effects of phytic acid on reinforced low-carbon mortar: Dealkalization of red mud and improvement of corrosion resistance

In concrete production, partially replacing ordinary Portland cement (OPC) with red mud (RM) offers environmental and low-carbon benefits while enhancing steel corrosion resistance. However, to mitigate risks of alkali-aggregate reaction (AAR) in concrete, RM requires a pretreatment of dealkalization, especially when it comes to large substitution ratios. Phytic acid (PA), an acidic organic inhibitor, shows promise in effectively reducing the alkalinity of RM. This study explores the use of PA for RM dealkalization before its incorporation as the OPC substitute in reinforced mortars. In addition to the effective dealkalization by PA, the results also demonstrate a synergistic effect between PA and RM in improving the corrosion resistance of steel embedded in mortar. Furthermore, a feasible explanation for this synergistic inhibition is proposed, highlighting the combined roles of PA and RM in protecting steel from chloride-induced corrosion.

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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.