基于全生命周期评价法的预拌混凝土碳足迹计算分析及碳减排研究

Calculation and analysis of carbon footprint of ready-mixed concrete based on LCA and research on carbon emission reduction technology

预拌混凝土作为最主要的建材消耗品之一,碳减排潜力巨大。以不同强度等级的预拌混凝土作为研究对象,基于全生命周期评价法,针对各环节进行碳足迹计算,研究相应碳减排技术。强度为C30、C35、C40的泵送预拌混凝土生命周期的碳排放量分别为273.19、291.06、320.10 kgCO_(2e)/m~3,碳排放量与强度等级呈正相关,因此选用低碳水泥或者减少水泥用量是降低预拌混凝土碳排放量最直接有效的手段。此外,通过采用智能化运输、生产技术,固封CO_(2)混凝土技术等手段也能实现混凝土的辅助降碳。

As one of the most important building materials consumables,ready-mixed concrete has enormous potential for carbon reduction.This article takes ready-mixed concrete of different strength levels as the research object,and based on the Full Life Cycle Assessment method,carbon footprint analysis is conducted for each link,and corresponding carbon emission reduction technologies are studied.The carbon emissions during the life cycle of pumped ready-mixed concrete with strengths of C30,C35,and C40 are 273.19,291.06,320.10 kgCO_(2e)/m^(3),respectively.The carbon emissions are positively correlated with the strength grade.Therefore,choosing low-carbon cement or reducing cement usage is the most direct and effective means to reduce the carbon emissions of ready-mixed concrete.In addition,auxiliary carbon reduction of concrete can also be achieved through the use of intelligent transportation,production technology,and CO_(2)concrete sealing technology.