含湿碳酸再生混凝土细粒水泥浆的氯化物结合

IF 10.9 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Yuguang Mao , Zhenguo Shi , Xiang Hu , Amani Khaskhoussi , Caijun Shi
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引用次数: 0

摘要

湿碳化再生混凝土细粒(RCF)对水泥浆体氯离子结合力的总体影响定量解耦合为膏体pH值降低的影响,以及湿碳化再生混凝土细粒中各组分(未碳化相、CaCO3、硅胶)的贡献。结果表明,湿碳化RCF的掺入降低了水泥浆体的化学和物理氯离子结合能力。前者的下降幅度明显低于后者。决定氯离子结合力降低程度的主要因素是膏体pH值的降低和硅胶的作用。这两种效应随RCF碳化程度的增加而显著,主要随碳化时间的增加而增加。在RCF湿碳化过程中,增加CO₂流量可以有效地减轻由于生产的硅胶中铝含量增加而对氯离子结合能力的负面影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Chloride binding of cement paste containing wet carbonated recycled concrete fines
The overall effect of wet carbonation recycled concrete fines (RCF) on the chloride binding capacity of cement paste was quantitatively decoupled into the effect of paste pH reduction, and the contribution of each component (uncarbonated phase, CaCO3, silica gel) in the wet carbonated RCF. Results indicate that incorporating wet carbonated RCF decreases both the chemical and physical chloride binding capacity of the cement paste. The extent of the decrease in the former is significantly lower than that of the latter. The main factors determining the extent of the decrease in chloride binding capacity are the reduction of paste pH and the effect of silica gel. These two effects become significant with increasing carbonation degree of RCF, mainly with increasing carbonation time. Increasing the CO₂ flow rate during RCF wet carbonation effectively mitigates the negative impact on chloride binding capacity due to the increased aluminum content in the produced silica gel.
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来源期刊
Cement and Concrete Research
Cement and Concrete Research 工程技术-材料科学:综合
CiteScore
20.90
自引率
12.30%
发文量
318
审稿时长
53 days
期刊介绍: Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.
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