Biocement treatment for upcycling construction and demolition wastes as concrete aggregates
Reutilisation of the construction and demolition (C&D) wastes as aggregate in concrete is a vital step towards sustainability as it prevents depletion of natural resources as well as alleviates wastes. However, the attached mortar on the aggregate surface renders certain shortcomings like excess...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Language: | English |
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SPRINGER
2022
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| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/LP180100132 http://hdl.handle.net/20.500.11937/90916 |
| _version_ | 1848765459794493440 |
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| author | Mistri, Abhijit Dhami, Navdeep Bhattacharyya, S.K. Barai, S.V. Mukherjee, Abhijit |
| author_facet | Mistri, Abhijit Dhami, Navdeep Bhattacharyya, S.K. Barai, S.V. Mukherjee, Abhijit |
| author_sort | Mistri, Abhijit |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Reutilisation of the construction and demolition (C&D) wastes as aggregate in concrete is a vital step towards sustainability as it prevents depletion of natural resources as well as alleviates wastes. However, the attached mortar on the aggregate surface renders certain shortcomings like excessive water absorption, high porosity, and weak interfaces. Recycled aggregates can be treated to improve these shortcomings. However, the minimisation of the drawbacks involves huge energy, materials, and cost. Moreover, the efficacy of such adopted method is sometime questionable, and which needs further research. This study demonstrates bio-treatment of recycled coarse aggregate (RCA) as a means of upcycling and compares it with conventional cement slurry treatment. A novel spraying technique has been applied that significantly economises biocement treatment. The experimental results show that biocement treatment reduced the water absorption by 70%. The treatment has filled the pores of RCA and has prevented water absorption. In contrast, cement slurry coating treatment shows increase in water absorption of RCA by 19%. The compressive strength of concrete with 100% biocement treated RCA surpasses that of concrete with natural coarse aggregates. The genesis of this dramatic improvement in case of biocement has been established through micro-scale studies including scanning electron microscopy and energy-dispersive X-ray spectroscopy. The cost analysis demonstrates that RCA upcycled with biocement treatment is more economical than natural aggregates or cement treated ones. Findings of the present study led to the conclusion that 100% replacement of natural coarse aggregates can be achieved by upcycling C&D wastes as coarse aggregate through bio-treatment. |
| first_indexed | 2025-11-14T11:35:36Z |
| format | Journal Article |
| id | curtin-20.500.11937-90916 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:35:36Z |
| publishDate | 2022 |
| publisher | SPRINGER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-909162023-05-11T07:06:55Z Biocement treatment for upcycling construction and demolition wastes as concrete aggregates Mistri, Abhijit Dhami, Navdeep Bhattacharyya, S.K. Barai, S.V. Mukherjee, Abhijit Science & Technology Technology Construction & Building Technology Engineering, Civil Materials Science, Multidisciplinary Engineering Materials Science Microbial carbonate precipitation Concrete recycling Recycled aggregate Microstructural analysis Construction and demolition waste Compressive strength MICROBIAL CARBONATE PRECIPITATION RECYCLED AGGREGATE PERFORMANCE DURABILITY QUALITY SURFACE SILICA Reutilisation of the construction and demolition (C&D) wastes as aggregate in concrete is a vital step towards sustainability as it prevents depletion of natural resources as well as alleviates wastes. However, the attached mortar on the aggregate surface renders certain shortcomings like excessive water absorption, high porosity, and weak interfaces. Recycled aggregates can be treated to improve these shortcomings. However, the minimisation of the drawbacks involves huge energy, materials, and cost. Moreover, the efficacy of such adopted method is sometime questionable, and which needs further research. This study demonstrates bio-treatment of recycled coarse aggregate (RCA) as a means of upcycling and compares it with conventional cement slurry treatment. A novel spraying technique has been applied that significantly economises biocement treatment. The experimental results show that biocement treatment reduced the water absorption by 70%. The treatment has filled the pores of RCA and has prevented water absorption. In contrast, cement slurry coating treatment shows increase in water absorption of RCA by 19%. The compressive strength of concrete with 100% biocement treated RCA surpasses that of concrete with natural coarse aggregates. The genesis of this dramatic improvement in case of biocement has been established through micro-scale studies including scanning electron microscopy and energy-dispersive X-ray spectroscopy. The cost analysis demonstrates that RCA upcycled with biocement treatment is more economical than natural aggregates or cement treated ones. Findings of the present study led to the conclusion that 100% replacement of natural coarse aggregates can be achieved by upcycling C&D wastes as coarse aggregate through bio-treatment. 2022 Journal Article http://hdl.handle.net/20.500.11937/90916 10.1617/s11527-022-01955-3 English http://purl.org/au-research/grants/arc/LP180100132 http://creativecommons.org/licenses/by/4.0/ SPRINGER fulltext |
| spellingShingle | Science & Technology Technology Construction & Building Technology Engineering, Civil Materials Science, Multidisciplinary Engineering Materials Science Microbial carbonate precipitation Concrete recycling Recycled aggregate Microstructural analysis Construction and demolition waste Compressive strength MICROBIAL CARBONATE PRECIPITATION RECYCLED AGGREGATE PERFORMANCE DURABILITY QUALITY SURFACE SILICA Mistri, Abhijit Dhami, Navdeep Bhattacharyya, S.K. Barai, S.V. Mukherjee, Abhijit Biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| title | Biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| title_full | Biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| title_fullStr | Biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| title_full_unstemmed | Biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| title_short | Biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| title_sort | biocement treatment for upcycling construction and demolition wastes as concrete aggregates |
| topic | Science & Technology Technology Construction & Building Technology Engineering, Civil Materials Science, Multidisciplinary Engineering Materials Science Microbial carbonate precipitation Concrete recycling Recycled aggregate Microstructural analysis Construction and demolition waste Compressive strength MICROBIAL CARBONATE PRECIPITATION RECYCLED AGGREGATE PERFORMANCE DURABILITY QUALITY SURFACE SILICA |
| url | http://purl.org/au-research/grants/arc/LP180100132 http://hdl.handle.net/20.500.11937/90916 |