摘要
公路工程建筑固废资源化利用可有效解决既有道路设施拆除废弃物的处治难题,同时替代价格高昂的级配碎石作为水稳层再生集料以节约工程建设成本,具有良好的环境、经济及社会效益。为合理量化建设期公路工程建筑固废利用的碳减排效益,采用LCA生命周期评价方法对公路工程建筑固废利用开展碳减排核算评价,为技术推广应用及辅助公路工程方案比选决策提供数据支撑,同时为公路行业碳排放核算计量工作提供一定内容补充。研究表明:建筑固废资源化利用技术具有显著减碳效益,建筑固废再生利用方案碳减排贡献率达20.43%,1 t公路工程建筑固废的碳减排量为12.54 kgCO 2e,1 t建筑固废碳减排贡献率为27.35%;生产阶段建筑固废原材料再生集料分选破碎应重点关注破碎设备选型;材料运输阶段碳减排受运距影响较大,应结合实际工程需求及线路规划要求确定建筑固废处理厂选址;现场施工阶段涉及碳排放较高设备工艺可进一步实施方案优化。
The resource utilization of solid waste in highway engineering can effectively solve the problem of demolition waste disposal of existing road facilities,and at the same time replace the expensive graded gravel as the regenerated aggregate of the cement stabilization layer to save the cost of engineering construction,and has good environmental,economic and social benefits.In order to reasonably quantify the carbon emission reduction benefits of highway engineering construction solid waste utilization during the construction period,the LCA life cycle assessment method was used to carry out carbon emission reduction accounting and evaluation of highway engineering construction solid waste utilization,which provided data support for the promotion and application of technology and auxiliary highway engineering scheme comparison and decision-making,and provided a certain content supplement for the carbon emission accounting and measurement work of the highway industry.The results show that the resource utilization technology of construction solid waste has significant carbon reduction benefits,and the carbon emission reduction contribution rate of construction solid waste recycling scheme is up to 20.43%,the carbon emission reduction rate of construction solid waste of 1 t highway engineering is 12.54 kgCO 2e,and the carbon emission reduction contribution rate of 1 t construction solid waste is 27.35%.In the raw material production stage of construction solid waste recycling,the sorting and crushing of construction solid waste recycling aggregates should focus on the selection of crushing equipment;Carbon emission reduction in the material transportation stage is greatly affected by the transportation distance,and the site selection of the construction solid waste treatment plant should be determined in combination with the actual engineering needs and route planning requirements.The equipment process involving high carbon emissions during the on-site construction phase can be further optimized.
作者
余梦
张静波
陈楚龙
李卓智
杨明
Yu Meng;Zhang Jingbo;Chen Chulong;Li Zhuozhi;Yang Ming(CCCC Second Highway Survey,Design and Research Institute Co.,Ltd.,Wuhan 430056,China)
出处
《青海交通科技》
2024年第2期58-65,共8页
Qinghai Transportation Science and Technology
基金
中交集团重大科研项目(KJFZ—2022J—034)
中交第二公路勘察设计研究院有限公司2022年度科技专项(KJFZ—2022—001)
“广深基于路地协同的固体废弃物高值化再生利用技术研究”专题(2021—169—011)
广东省省级科技计划项目(2021B1111610002)。
关键词
公路工程建筑固废
LCA评价方法
评估边界
碳减排
highway engineering construction solid waste
LCA evaluation methodology
assess boundaries
carbon emission reduction
