Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA
Switching from waste concrete disposal to recycling is urgently needed to enhance resource efficiency and reduce carbon emissions. This paper proposes a sustainable design framework for recycled concrete, incorporating shape optimization and carbon dioxide (CO2) emission analysis using life cycle a...
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| Format: | Article |
| Language: | English |
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Vilnius Gediminas Technical University
2025-08-01
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| Series: | Journal of Civil Engineering and Management |
| Subjects: | |
| Online Access: | https://journals.vilniustech.lt/index.php/JCEM/article/view/24108 |
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| _version_ | 1849226785476050944 |
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| author | Weina Zhu Jianing Li Linghan Wang Xiaodong Li |
| author_facet | Weina Zhu Jianing Li Linghan Wang Xiaodong Li |
| author_sort | Weina Zhu |
| collection | DOAJ |
| description |
Switching from waste concrete disposal to recycling is urgently needed to enhance resource efficiency and reduce carbon emissions. This paper proposes a sustainable design framework for recycled concrete, incorporating shape optimization and carbon dioxide (CO2) emission analysis using life cycle assessment (LCA). Using recycled concrete in infrastructure projects, this paper develops a carbon dioxide emissions accounting model based on LCA. Two water-cement ratios (WCR) and four recycled concrete aggregate replacement rates (RCARR) were tested on two natural aggregate concrete (NAC) and six recycled aggregate concrete (RAC) samples. Furthermore, four shapes options for the RAC structural member were designed, optimized, and compared. The G35 Expressway slope projects were used as a case study. The results showed that the regular hexagonal RAC structural member was selected for the project, achieving a carbon reduction rate of about 9%. The study also found that 1) life cycle carbon emission decreases with the increase of WCR and RCARR, respectively; 2) compared to NAC, the key processes of carbon emission reduction of RAC include the raw material acquisition and transportation stage as well as the carbonization absorption stage; 3) there is a transport distance threshold, beyond which the life cycle CO2 emissions of RAC exceed those of NAC.
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| format | Article |
| id | doaj-art-4da7ac38352f4e08bbf479d838ff18dd |
| institution | Kabale University |
| issn | 1392-3730 1822-3605 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Journal of Civil Engineering and Management |
| spelling | doaj-art-4da7ac38352f4e08bbf479d838ff18dd2025-08-24T07:52:55ZengVilnius Gediminas Technical UniversityJournal of Civil Engineering and Management1392-37301822-36052025-08-0131610.3846/jcem.2025.24108Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCAWeina Zhu0Jianing Li1Linghan Wang2Xiaodong Li3School of Economics and Management Engineering, Beijing University of Civil Engineering and Architecture, 100044 Beijing, ChinaDepartment of Construction Management, School of Civil Engineering, Tsinghua University, 100084 Beijing, ChinaSchool of Economics and Management Engineering, Beijing University of Civil Engineering and Architecture, 100044 Beijing, ChinaDepartment of Construction Management, School of Civil Engineering, Tsinghua University, 100084 Beijing, China Switching from waste concrete disposal to recycling is urgently needed to enhance resource efficiency and reduce carbon emissions. This paper proposes a sustainable design framework for recycled concrete, incorporating shape optimization and carbon dioxide (CO2) emission analysis using life cycle assessment (LCA). Using recycled concrete in infrastructure projects, this paper develops a carbon dioxide emissions accounting model based on LCA. Two water-cement ratios (WCR) and four recycled concrete aggregate replacement rates (RCARR) were tested on two natural aggregate concrete (NAC) and six recycled aggregate concrete (RAC) samples. Furthermore, four shapes options for the RAC structural member were designed, optimized, and compared. The G35 Expressway slope projects were used as a case study. The results showed that the regular hexagonal RAC structural member was selected for the project, achieving a carbon reduction rate of about 9%. The study also found that 1) life cycle carbon emission decreases with the increase of WCR and RCARR, respectively; 2) compared to NAC, the key processes of carbon emission reduction of RAC include the raw material acquisition and transportation stage as well as the carbonization absorption stage; 3) there is a transport distance threshold, beyond which the life cycle CO2 emissions of RAC exceed those of NAC. https://journals.vilniustech.lt/index.php/JCEM/article/view/24108recycled concretecarbon dioxide emissionsshape design optimizationinfrastructure |
| spellingShingle | Weina Zhu Jianing Li Linghan Wang Xiaodong Li Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA Journal of Civil Engineering and Management recycled concrete carbon dioxide emissions shape design optimization infrastructure |
| title | Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA |
| title_full | Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA |
| title_fullStr | Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA |
| title_full_unstemmed | Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA |
| title_short | Sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on LCA |
| title_sort | sustainable design of recycled concrete using shape optimization and carbon dioxide emission based on lca |
| topic | recycled concrete carbon dioxide emissions shape design optimization infrastructure |
| url | https://journals.vilniustech.lt/index.php/JCEM/article/view/24108 |
| work_keys_str_mv | AT weinazhu sustainabledesignofrecycledconcreteusingshapeoptimizationandcarbondioxideemissionbasedonlca AT jianingli sustainabledesignofrecycledconcreteusingshapeoptimizationandcarbondioxideemissionbasedonlca AT linghanwang sustainabledesignofrecycledconcreteusingshapeoptimizationandcarbondioxideemissionbasedonlca AT xiaodongli sustainabledesignofrecycledconcreteusingshapeoptimizationandcarbondioxideemissionbasedonlca |