Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar
The utilization of construction and demolition waste is useful for sustainable infrastructure development and protecting the environment. In this research, the properties of self-compacting concrete produced by replacing the natural coarse aggregates (NCA) with inferior recycled coarse aggregates (R...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/4566531 |
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| author | Syed Ali Rizwan Muhammad Irfan-ul-Hassan Abdur Rahim Salman Ali Asim Sultan Deprizon Syamsunur Nur Izzi Md Yusoff |
| author_facet | Syed Ali Rizwan Muhammad Irfan-ul-Hassan Abdur Rahim Salman Ali Asim Sultan Deprizon Syamsunur Nur Izzi Md Yusoff |
| author_sort | Syed Ali Rizwan |
| collection | DOAJ |
| description | The utilization of construction and demolition waste is useful for sustainable infrastructure development and protecting the environment. In this research, the properties of self-compacting concrete produced by replacing the natural coarse aggregates (NCA) with inferior recycled coarse aggregates (RCA) were investigated. The properties of self-compacting concrete (SCC) and self-compacting mortar (SCM) with varying replacements of RCA (0, 25, 50, and 100%) in NCA were determined. The flow, strength, early shrinkage tests, and microstructure using X-ray diffraction (XRD) and a scanning electron microscope (SEM) were investigated. The fresh property results indicated that the viscosity of freshly mixed SCC increased with higher replacement levels of RCA, thus reducing flow. The compressive strength of RCA SCC was reduced up to 30% for a 100% replacement level, while the flexural strength was reduced by about 15%. The compressive strength and flexural strength of SCMs, however, increased up to 12% and 28% for 100% replacement with RCA. The mechanical strength of SCM increases with RCA because of high fine content which reduces the porosity and makes the system denser. The early age linear shrinkage increases with RCA due to its greater water absorption. The results indicate that recycled coarse aggregate can be effectively used as the replacement of NCA in SCC to produce sustainable and eco-friendly structural concrete. |
| format | Article |
| id | doaj-art-8562be96e85f4a8097c709daf539877c |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-8562be96e85f4a8097c709daf539877c2025-08-20T03:37:47ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/4566531Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and MortarSyed Ali Rizwan0Muhammad Irfan-ul-Hassan1Abdur Rahim2Salman Ali3Asim Sultan4Deprizon Syamsunur5Nur Izzi Md Yusoff6National University of Computer and Emerging Sciences (NUCES)Department of Civil EngineeringDepartment of Transportation Engineering and ManagementThe NUST Institute of Civil EngineeringThe NUST Institute of Civil EngineeringDepartment of Civil EngineeringDepartment of Civil EngineeringThe utilization of construction and demolition waste is useful for sustainable infrastructure development and protecting the environment. In this research, the properties of self-compacting concrete produced by replacing the natural coarse aggregates (NCA) with inferior recycled coarse aggregates (RCA) were investigated. The properties of self-compacting concrete (SCC) and self-compacting mortar (SCM) with varying replacements of RCA (0, 25, 50, and 100%) in NCA were determined. The flow, strength, early shrinkage tests, and microstructure using X-ray diffraction (XRD) and a scanning electron microscope (SEM) were investigated. The fresh property results indicated that the viscosity of freshly mixed SCC increased with higher replacement levels of RCA, thus reducing flow. The compressive strength of RCA SCC was reduced up to 30% for a 100% replacement level, while the flexural strength was reduced by about 15%. The compressive strength and flexural strength of SCMs, however, increased up to 12% and 28% for 100% replacement with RCA. The mechanical strength of SCM increases with RCA because of high fine content which reduces the porosity and makes the system denser. The early age linear shrinkage increases with RCA due to its greater water absorption. The results indicate that recycled coarse aggregate can be effectively used as the replacement of NCA in SCC to produce sustainable and eco-friendly structural concrete.http://dx.doi.org/10.1155/2022/4566531 |
| spellingShingle | Syed Ali Rizwan Muhammad Irfan-ul-Hassan Abdur Rahim Salman Ali Asim Sultan Deprizon Syamsunur Nur Izzi Md Yusoff Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar Advances in Materials Science and Engineering |
| title | Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar |
| title_full | Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar |
| title_fullStr | Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar |
| title_full_unstemmed | Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar |
| title_short | Recycled Coarse Aggregate for Sustainable Self-Compacting Concrete and Mortar |
| title_sort | recycled coarse aggregate for sustainable self compacting concrete and mortar |
| url | http://dx.doi.org/10.1155/2022/4566531 |
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