A comprehensive review on carbon utilization pathways in concrete from conventional to improved strategies

Carbon Capture Science & Technology Pub Date : 2025-07-16 DOI:10.1016/j.ccst.2025.100467

Diego Aceituno , Xihong Zhang , Hong Hao

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Abstract

The concrete industry is a major contributor to global CO₂ emissions, primarily due to Ordinary Portland Cement (OPC) production. This review explores Carbon Capture and Utilization (CCU) technologies aimed at reducing the sector’s environmental impact, focusing on the carbonation of recycled concrete aggregates (RCA), waste cement powders (WCP), and alternative non-hydraulic cements. It discusses recent advances in carbonation techniques, the integration of CCU with sustainable binders, and the challenges of industrial scalability. The distinct chemical and mineralogical characteristics of OPC-based materials and industrial byproducts significantly influence both their structural applicability and carbonation potential. While carbonated RCA and WCP offer limited CO₂ mitigation, greater reductions may be achieved by combining CCU with supplementary cementitious materials and low-carbon clinkers. Further research is needed to optimize carbonation processes, validate structural performance, and evaluate life cycle impacts in synergy with other decarbonisation strategies.

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混凝土碳利用途径从常规到改进策略的综合综述

混凝土行业是全球二氧化碳排放的主要贡献者，主要是由于普通波特兰水泥（OPC）的生产。本文探讨了旨在减少该行业环境影响的碳捕集与利用（CCU）技术，重点是再生混凝土骨料（RCA）、废水泥粉（WCP）和替代非水力水泥的碳化。它讨论了碳化技术的最新进展，CCU与可持续粘合剂的集成，以及工业可扩展性的挑战。opc基材料和工业副产品的独特化学和矿物学特征显著影响了它们的结构适用性和碳化潜力。虽然碳化RCA和WCP的二氧化碳减排效果有限，但通过将CCU与补充胶凝材料和低碳熟料相结合，可以实现更大的减排。需要进一步的研究来优化碳化工艺，验证结构性能，并评估与其他脱碳策略协同作用的生命周期影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Carbon Capture Science & Technology

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