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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

39卷

期数:

2022年01期

页码:

97-105

栏目:

出版日期:

2022-02-15

文章信息/Info

Title:

Research on Carbon Emission of Recycled Aggregate Concrete Structures in Taiyuan

文章编号:

1673-2049(2022)01-0097-09

作者:

雷 颖^1,2,肖建庄²,王春晖^2,3

(1. 山西大学 电力与建筑学院,山西 太原 030006; 2. 同济大学 土木工程学院,上海 200092; 3. 哈尔滨工业大学(深圳)土木与环境工程学院,广东 深圳 518055)

Author(s):

LEI Ying^1,2, XIAO Jian-zhuang², WANG Chun-hui^2,3

(1. School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan 030006, Shanxi, China; 2. College of Civil Engineering, Tongji University, Shanghai 200092, China; 3. School of Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, Guangdong, China)

关键词:

建筑固废;  资源化;  再生混凝土结构;  碳排放;  基于过程的全生命周期分析

Keywords:

construction waste;  recycling;  recycled aggregate concrete structure;  carbon emissions;  process-based life cycle analysis

分类号:

TU528.52

DOI:

10.19815/j.jace.2021.08018

文献标志码:

A

摘要:

为了研究中国内陆城市使用再生混凝土替代普通混凝土的环境潜力以便为工程决策提供参考,以山西太原为例研究再生混凝土结构的碳排放。在确定系统边界和分析目标的基础上,根据实地调研与文献数据,确定了太原当地碳排放清单,建立了生命周期评价的基础。根据实际调研得到的混凝土配合比、原材料运输距离等参数,分析太原2个典型混凝土结构分别采用普通混凝土和再生混凝土在骨料生产、水泥生产、运输和填埋过程中所产生的等效碳排放。基于太原当地碳排放清单和选定的边界条件,以典型案例的实际数据为基础,进行运输距离的敏感性分析。结果表明:在采用太原当地碳排放清单、混凝土配合比和运输距离等数据的情况下,相比采用天然骨料混凝土,2个典型结构采用再生粗骨料取代率为100%的再生混凝土等效碳排放可分别降低3.25%和8.39%,且显著降低天然骨料开采及填埋场占用土地,具有较为显著的环境效益; 确定了采用再生混凝土取代天然骨料混凝土具有相对碳排放优势的范围; 天然骨料从矿山运输至搅拌站距离、废弃混凝土从拆除现场运输至填埋场距离以及废弃混凝土从拆除现场运输至再生建材工厂距离的临界值分别为18.3、8.5、18.8 km。

Abstract:

In order to study the environmental potential of using recycled concrete to replace ordinary concrete in inland cities of China and provide reference for engineering decision-making, the carbon emission of recycled concrete structures in Shanxi Taiyuan was studied. On the basis of the system boundary and analysis objectives, the local carbon emission inventory of Taiyuan was determined, and the basis of life cycle assessment was established according to the field investigation and literature review. According to the parameters of concrete mix proportion and raw material transportation distance and other parameters from field investigation, the equivalent carbon emissions of two typical concrete structures in Taiyuan using ordinary concrete and recycled concrete in aggregate production, cement production, transportation and landfill were analyzed. Based on the local carbon emission inventory and the selected boundary conditions, the sensitivity analysis of transportation distance was carried out according to the actual data of typical cases. The results show that compared with natural aggregate concrete, the equivalent carbon emissions of recycled concrete with 100% replacement rate of recycled coarse aggregates in two typical structures can be reduced by 3.25% and 8.39% in the case of using local carbon emission inventory, concrete mix ratio and transportation distance data, and the exploitation of natural resources and land for waste disposal are dramatically reduced, showing a significant environmental benefit. The range of relative carbon emission advantage of recycled concrete replacing natural aggregate concrete is determined. The critical distance of natural aggregate transportation from mine to mixing station, the distance of waste concrete transportation from demolition site to landfill site, and the distance of waste concrete transportation from demolition site to recycled plant are 18.3, 8.5, 18.8 km respectively.

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相似文献/References:

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[2]肖建庄,沈剑羽,高 琦,等.工程弃土现状与资源化创新技术[J].建筑科学与工程学报,2020,37(04):1.[doi:10.19815/j.jace.2019.11038]
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[3]肖建庄,张文泽,刘堡嘉,等.城市中心区高层建筑绿色拆除方法[J].建筑科学与工程学报,2021,38(01):23.[doi:10.19815/j.jace.2020.05043]
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备注/Memo

备注/Memo:

收稿日期:2021-08-01
基金项目:山西省科技厅软科学项目(2019041023-2)
作者简介:雷 颖(1972-),女,山西平遥人,高级工程师,管理学硕士,E-mail:leiying@sxu.edu.cn。
通信作者:肖建庄(1968-),男,山东沂南人,教授,博士研究生导师,工学博士,E-mail:jzx@tongji.edu.cn。

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更新日期/Last Update: 2021-02-10