|Table of Contents|

Research on Carbon Emission of Recycled Aggregate Concrete Structures in Taiyuan(PDF)

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

Issue:
2022年01期
Page:
97-105
Research Field:
Publishing date:

Info

Title:
Research on Carbon Emission of Recycled Aggregate Concrete Structures in Taiyuan
Author(s):
LEI Ying1; 2;  XIAO Jian-zhuang2;  WANG Chun-hui2; 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)
Keywords:
construction waste;  recycling;  recycled aggregate concrete structure;  carbon emissions;  process-based life cycle analysis
PACS:
TU528.52
DOI:
10.19815/j.jace.2021.08018
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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Last Update: 2021-02-10