Abstract The main conclusions of an analysis of low-CO2, eco-efficient cement-based materials, carried out by a multi-stakeholder working group initiated by the United Nations Environment Program Sustainable Building and Climate Initiative (UNEP-SBCI) are presented, based on the white papers published in this special issue. We believe that Portland-based cement approaches will dominate in the near future due to economies of scale, levels of process optimisation, availability of raw materials and market confidence. Two product-based approaches can deliver substantial additional reductions in their global CO2 emissions, reducing the need for costly investment in carbon capture and storage (CCS) over the next 20–30 years: 1. Increased use of low-CO2 supplements (SCMs) as partial replacements for Portland cement clinker. 2. More efficient use of Portland cement clinker in mortars and concretes. However, other emerging technologies could also play an important role in emissions mitigation in the longer term, and thus merit further investigation.

中文翻译：

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生态高效水泥：低 CO 2 水泥基材料行业的潜在经济可行解决方案

摘要 介绍了由联合国环境规划署可持续建筑和气候倡议 (UNEP-SBCI) 发起的多利益相关方工作组对低 CO2、生态高效的水泥基材料进行的分析的主要结论，基于在本特刊上发表的白皮书中。我们相信，由于规模经济、工艺优化水平、原材料的可用性和市场信心，基于波特兰的水泥方法将在不久的将来占据主导地位。两种基于产品的方法可以进一步大幅减少其全球二氧化碳排放量，从而减少未来 20-30 年对碳捕获和封存 (CCS) 的高成本投资的需求： 1. 增加使用低二氧化碳补充剂 (SCM)作为波特兰水泥熟料的部分替代品。2. 在砂浆和混凝土中更有效地使用波特兰水泥熟料。然而，从长远来看，其他新兴技术也可以在减排方面发挥重要作用，因此值得进一步研究。