Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete
This study explores the key technologies for the preparation of fully recycled concrete kerbstone (RCK) and its frost resistance. It explores the physicochemical properties of recycled micropowder (RMP) and recycled aggregate (RA), and reveals the secondary hydration mechanism of RMP, thus providing...
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| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525001020 |
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| author | Chao-qiang Wang Yan Ying Sheng-hui Gao Jian-shan Huang Meng-sheng Shao |
| author_facet | Chao-qiang Wang Yan Ying Sheng-hui Gao Jian-shan Huang Meng-sheng Shao |
| author_sort | Chao-qiang Wang |
| collection | DOAJ |
| description | This study explores the key technologies for the preparation of fully recycled concrete kerbstone (RCK) and its frost resistance. It explores the physicochemical properties of recycled micropowder (RMP) and recycled aggregate (RA), and reveals the secondary hydration mechanism of RMP, thus providing new theoretical support for the global utilization of waste concrete resources. The optimal mix ratio for RCK were determined based on the changes in material properties and freezing resistance with varying dosages of RMP and RA. This study fills the current technological gap in the field of fully RCK internationally, and based on the principle of interfacial effects, the study reveals the interfacial morphological characteristics of RCK. The research results show that the physicochemical properties of RA meet the requirements of the Chinese standards ''Recycled coarse aggregates for concrete'' (GB/T25177–2010) and ''Recycled fine aggregate for concrete and mortar'' (GB/T25176–2010), while the pozzolanic activity of recycled micro-powder reaches 65.2 %, exhibiting significant secondary hydration reactivity. The optimized fully RCK demonstrate excellent compressive strength and frost resistance, meeting the relevant requirements of the ''Concrete kerbs'' (JC/T899–2016) and ''Standard for test methods of long-term performance and durability of ordinary concrete'' (BT 50082–2009). There are three kinds of interfacial transition zones in RCK. These zones reduce interface connectivity and weaken RCK's resistance to external moisture, chemicals, and other erosive factors. Moreover, the research through carbon emission analysis indicates that this technology can reduce carbon emissions by approximately 99 %, offering considerable environmental benefits. By combining Citespace visualization analysis, this study proposes a key technological system for the preparation of fully RCK. This study contributes to the international development of waste concrete resource utilization and offers a new pathway with ecological, environmental, and socio-economic implications. |
| format | Article |
| id | doaj-art-e7efe0c7eaf947afb993e85deed9e11f |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-e7efe0c7eaf947afb993e85deed9e11f2025-02-03T04:16:43ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04303Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concreteChao-qiang Wang0Yan Ying1Sheng-hui Gao2Jian-shan Huang3Meng-sheng Shao4School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; Corresponding author.School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, ChinaXiamen Jiehang Engineering Testing Technology Co.,LTD, Xiamen, Fujian 361006, ChinaXiamen Jiehang Engineering Testing Technology Co.,LTD, Xiamen, Fujian 361006, ChinaCCCC Third Navigation Bureau (Xiamen) Ocean Engineering Co., LTD, Xiamen, Fujian 361006, ChinaThis study explores the key technologies for the preparation of fully recycled concrete kerbstone (RCK) and its frost resistance. It explores the physicochemical properties of recycled micropowder (RMP) and recycled aggregate (RA), and reveals the secondary hydration mechanism of RMP, thus providing new theoretical support for the global utilization of waste concrete resources. The optimal mix ratio for RCK were determined based on the changes in material properties and freezing resistance with varying dosages of RMP and RA. This study fills the current technological gap in the field of fully RCK internationally, and based on the principle of interfacial effects, the study reveals the interfacial morphological characteristics of RCK. The research results show that the physicochemical properties of RA meet the requirements of the Chinese standards ''Recycled coarse aggregates for concrete'' (GB/T25177–2010) and ''Recycled fine aggregate for concrete and mortar'' (GB/T25176–2010), while the pozzolanic activity of recycled micro-powder reaches 65.2 %, exhibiting significant secondary hydration reactivity. The optimized fully RCK demonstrate excellent compressive strength and frost resistance, meeting the relevant requirements of the ''Concrete kerbs'' (JC/T899–2016) and ''Standard for test methods of long-term performance and durability of ordinary concrete'' (BT 50082–2009). There are three kinds of interfacial transition zones in RCK. These zones reduce interface connectivity and weaken RCK's resistance to external moisture, chemicals, and other erosive factors. Moreover, the research through carbon emission analysis indicates that this technology can reduce carbon emissions by approximately 99 %, offering considerable environmental benefits. By combining Citespace visualization analysis, this study proposes a key technological system for the preparation of fully RCK. This study contributes to the international development of waste concrete resource utilization and offers a new pathway with ecological, environmental, and socio-economic implications.http://www.sciencedirect.com/science/article/pii/S2214509525001020Waste concreteRecycled concrete kerbstoneMechanical propertiesFrost resistance |
| spellingShingle | Chao-qiang Wang Yan Ying Sheng-hui Gao Jian-shan Huang Meng-sheng Shao Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete Case Studies in Construction Materials Waste concrete Recycled concrete kerbstone Mechanical properties Frost resistance |
| title | Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete |
| title_full | Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete |
| title_fullStr | Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete |
| title_full_unstemmed | Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete |
| title_short | Pozzolanic reaction, basic properties, carbon reduction and visualisation of kerbstone prepared from recycled concrete |
| title_sort | pozzolanic reaction basic properties carbon reduction and visualisation of kerbstone prepared from recycled concrete |
| topic | Waste concrete Recycled concrete kerbstone Mechanical properties Frost resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525001020 |
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