摘要
基于GB/T 51366—2019《建筑碳排放计算标准》,采用清单统计法计算再生碎砖混凝土物化阶段碳排放量,分析其对环境的影响。结果表明:1 m3再生碎砖混凝土物化阶段碳排放量与再生粗骨料替代率成反比,即替代率越高碳排放量越低;原材料生产阶段碳排放量最高,占物化阶段的64%~84%;再生粗骨料运输距离缩短,原材料运输阶段碳减排效果显著,确定了再生粗骨料替代率为0、50%、100%的临界运输距离范围为95~114 km;施工阶段以“减排”和“低排”为目标,从机械设备和施工方案上进行管理优化。采用再生碎砖骨料在缩短运输距离的同时,减少了天然粗骨料开采占用的土地,具有显著的环境效益。
Based on the GB/T 51366—2019"Standard for building carbon emission calculation",the inventory statistics method was used to calculate the carbon emissions in the embodied stages of recycled crushed brick concrete and analyze its impact on the environment.The results show that the carbon emission in the embodied stages of 1 m3 recycled crushed brick concrete is inversely proportional to the substitution rate of recycled aggregate,i.e.the higher the substitution rate,the lower the carbon emission.Carbon emissions from raw material production are the highest,accounting for 64%~84%of the materialization phase.The carbon emission reduction effect of the raw material transportation stage is significant with the shortened transportation distance of recycled aggregates,and the critical transportation distance range of recycled aggregates substitution rate of 0,50%and 100%is determined from 95 km to 114 km.During the construction stage,we aim at"emission reduction"and"low emission",and optimize the management from mechanical equipment and construction plan.While shortening the transportation distance,the use of recycled crushed brick aggregate reduced the occccpied land by mining of natural coarse aggregate,has a significant environmental benefits.
作者
黄华恢
鉴倩倩
HUANG Huahui;JIAN Qianqian(School of Building Environment and Engineering,Guilin University of Aerospace Technology,Guilin 541004,China)
出处
《新型建筑材料》
2023年第8期104-108,共5页
New Building Materials
基金
广西重点研发计划项目(桂科AB21001)
广西高校中青年科研基础能力提升项目(2021KY0791)。
关键词
再生碎砖混凝土
物化阶段
碳排放
清单统计法
环境效益
recycled crushed brick concrete
embodied stages
carbon emissions
inventory statistics
environmental effects
