基于超细矿物掺合料的低碳混凝土研究  

Study on low⁃carbon concrete based on ultrafine mineral admixtures

作　　者：倪坤 陈喜旺 李悦[2] 冯鹏[3] 杨博文 代佳龙 NI Kun;CHEN Xiwang;LI Yue;FENG Peng;YANG Bowen;DAI Jialong(BCEG Advanced Construction Materials Co.,Ltd.,Beijing 100015,China;College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China;School of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京建工新型建材有限责任公司,北京100015 [2]北京工业大学建筑工程学院,北京100124 [3]清华大学土木工程系,北京100084

出　　处：《建筑结构》2025年第4期87-92,共6页Building Structure

摘　　要：《2030年前碳达峰行动方案》提出发展低碳混凝土。基于降低混凝土碳排放的目的,分析了目前我国混凝土碳排放的水平和构成,以及大掺量矿物掺合料对于低碳混凝土技术的作用,讨论了大掺量矿物掺合料低碳混凝土配合比设计的理论基础,以及混凝土的力学性能、耐久性和碳排放。结果表明:使用硅灰和超细复合粉可以使混凝土的矿物掺合料用量提高到45%,并减少水泥用量,可以实现C30~C60混凝土的抗压强度配制目标。并且基于超细矿物掺合料的混凝土的耐久性指标与常规混凝土相当或优于常规混凝土。相较于普通混凝土硅灰组C30和C50低碳混凝土碳排放分别降低10.2%和11.5%;超细复合粉组C30和C50低碳混凝土分别降低8.5%和6.9%。The action plan for carbon dioxide peaking before 2030 puts forward the development of low⁃carbon concrete.The current level and composition of carbon emissions from concrete was analyzed in China,as well as the role of large volume of mineral admixtures on low⁃carbon concrete.It was discussed the basic mix design theory of low⁃carbon concrete with large volume of ultrafine mineral admixtures,as well as the mechanical properties,durability,and carbon emissions of concrete.The results show the use of silica fume and ultrafine composite powder can increase the dosage of mineral admixtures up to 45%and decrease the dosage of Portland cement,which can achieve the compressive strength goal of C30~C60 concrete.Moreover,concrete with ultrafine composite powder is equivalent to or better than that of ordinary concrete.Compared with ordinary concrete,the carbon emissions of C30 and C50 low⁃carbon concrete in the silica fume group are reduced by 10.2%and 11.5%,and carbon emissions of C30 and C50 concrete in the ultrafine composite powder group are reduced by 8.5%and 6.9%,respectively.

关 键 词：碳排放 超细复合粉 硅灰 耐久性 低碳混凝土 

分 类 号：TU528[建筑科学—建筑技术科学]