Use of carbonated recycled cement paste powder as a new supplementary cementitious material: A critical review

IF 10.8 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Cement & concrete composites Pub Date : 2024-10-01 DOI:10.1016/j.cemconcomp.2024.105783
Yuguang Mao , Xiang Hu , Ubagaram Johnson Alengaram , Wei Chen , Caijun Shi
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Abstract

This paper focused on reviewing and decoupling analysis the effects of carbonated recycled cement paste powder (RCPP) as a new supplementary cementitious material (SCM) on the mechanical properties, rheology, durability, and carbon sequestration capacity of cement-based materials according to the results in previous studies. The results suggest that that carbonated RCPP serves as an excellent SCM in enhancing the compressive strength of cement paste, mainly through increasing the filler effect and the chemical reaction of CaCO3 with C3A. Extensive cement replacement with carbonated RCPP does not significantly reduce strength. However, when considering rheology and durability, particularly concerning steel corrosion, a 20–30 % cement replacement results in significant performance degradation due to the water absorption and the pozzolanic effect of silica gel, respectively. Furthermore, an increase in the carbonation products content (carbonation degree) can enhance the strength, but adversely affect rheological properties and corrosion resistance of reinforcement of cement-based material. Addressing this contradiction to synergistically enhance the various properties of cement-based material containing carbonated RCPP is the focus of future efforts.
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使用碳化再生水泥浆粉作为新型胶凝补充材料:重要综述
本文根据以往的研究结果,重点回顾和解耦分析了碳化再生水泥浆粉(RCPP)作为一种新型胶凝补充材料(SCM)对水泥基材料的力学性能、流变性、耐久性和固碳能力的影响。研究结果表明,碳化 RCPP 可作为一种出色的 SCM,主要通过增加填充效应以及 CaCO3 与 C3A 的化学反应来提高水泥浆的抗压强度。大量使用碳酸化 RCPP 替代水泥不会明显降低强度。但是,如果考虑到流变性和耐久性,特别是在钢材腐蚀方面,20%-30% 的水泥替代会导致性能显著下降,这分别是由于硅胶的吸水性和胶凝效应造成的。此外,增加碳化产物含量(碳化程度)可提高强度,但会对水泥基材料加固的流变性能和耐腐蚀性能产生不利影响。如何解决这一矛盾,以协同提高含有碳化 RCPP 的水泥基材料的各种性能,是今后工作的重点。
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来源期刊
Cement & concrete composites
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.
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