四类常用矿物掺合料的碳排放因子计算与对比  

Calculation and Comparison of Carbon Emission Factors for Four Commonly Used Mineral Admixtures

作　　者：林佐江 吕光耀 房奎圳 

机构地区：[1]中建一局集团建设发展有限公司,北京100102 [2]清华大学土木工程系,北京100084

出　　处：《混凝土世界》2025年第2期71-76,共6页China Concrete

摘　　要：建筑材料低碳生产是实现“双碳”目标的关键路径之一,矿物掺合料可在水泥、混凝土中分别替代熟料、水泥,以削减二者的总碳排放量。本文研究了粒化高炉矿渣粉、钢渣粉、粉煤灰、石灰石粉的生产工艺流程,使用全生命周期框架归纳了适用于4类矿物掺合料的碳排放核算边界,并结合排放因子法提出了矿物掺合料排放因子的计算公式。结果表明:通过获取4类矿物掺合料按粉磨系统分类的实际生产能耗数据,在50km的原料运输距离假设下,计算得到S95级矿渣粉、钢渣粉、F类I级粉煤灰、A级石灰石粉的碳排放因子分别为74.71、88.47、27.64、14.96kgCO_(2)/t,最后通过DB64/T1954—2023《混凝土碳排放计算方法及评价标准》及相关文献对比,验证了该计算结果的合理性和先进性。Low carbon production of building materials is one of the key paths to achieve the"dual carbon"goal.Mineral admixtures can replace clinker and cement in cement and concrete,respectively,to reduce their total carbon emissions.This article studies the production process of granulated blast furnace slag powder,steel slag powder,f ly ash,and limestone powder.Using a full life cycle framework,the carbon emission accounting boundaries applicable to four types of mineral admixtures are summarized,and a calculation formula for mineral admixture emission factors is proposed based on the emission factor method.The results show that the carbon emission factors of S95 slag powder,steel slag powder,F class I f ly ash,and A class limestone powder are respectively 74.71,88.47,27.64 and 14.96 kgCO2/t based on the actual production energy consumption data of four types of mineral admixtures classified according to the grinding system,and under the assumption of 50 km raw material transportation distance.Finally,the rationality and progressiveness of the calculation results are verified through the comparison of DB 64/T 1954—2023 Calculation Method and Evaluation Standard of Carbon Emission from Concrete and relevant literature.

关 键 词：矿物掺合料 碳排放因子 生产能耗 

分 类 号：TU5[建筑科学—建筑技术科学]