Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate
Abstract This study investigates the thermal and mechanical performance of geopolymer concrete incorporating recycled coarse aggregate (RCA) and copper slag (CS) as sustainable alternatives to natural aggregates. The geopolymer binder comprises fly ash (FA) and ground granulated blast furnace slag (...
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| Language: | English |
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Nature Portfolio
2025-08-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-15153-y |
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| author | Anasuya Sahu Pramod Kumar Bheem Pratap Abhilash Gogineni Regasa Yadeta Sembeta |
| author_facet | Anasuya Sahu Pramod Kumar Bheem Pratap Abhilash Gogineni Regasa Yadeta Sembeta |
| author_sort | Anasuya Sahu |
| collection | DOAJ |
| description | Abstract This study investigates the thermal and mechanical performance of geopolymer concrete incorporating recycled coarse aggregate (RCA) and copper slag (CS) as sustainable alternatives to natural aggregates. The geopolymer binder comprises fly ash (FA) and ground granulated blast furnace slag (GGBS), activated by a 12 M NaOH solution. RCA replaced 30% of natural coarse aggregate to form recycled aggregate concrete (RAC), while CS replaced natural fine aggregate in 20% increments up to 100% in RCA based geopolymer concrete to study its effect on compressive, split-tensile, and flexural strengths at ambient (27 °C) and elevated temperatures (100 °C, 300 °C, 500 °C, 700 °C). The experimental findings revealed that integrating CS improved both mechanical and residual thermal properties of RCA-based geopolymer concrete up to 45% and 41%, respectively, over the control mix. The optimal mix exhibited maximum mechanical performance with 30% RCA and 40% CS. This contributes to enhanced fire resistance, sustainability, and reduced dependency on natural resources. |
| format | Article |
| id | doaj-art-8fc350d45a9d4bd0bf08a8cadbc1fcc2 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-8fc350d45a9d4bd0bf08a8cadbc1fcc22025-08-20T03:42:35ZengNature PortfolioScientific Reports2045-23222025-08-0115112010.1038/s41598-025-15153-yThermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregateAnasuya Sahu0Pramod Kumar1Bheem Pratap2Abhilash Gogineni3Regasa Yadeta Sembeta4Department of Civil Engineering, Institute of Technology, Nirma UniversityDepartment of Civil Engineering, Mohan Babu University (SVEC)Department of Civil Engineering, Graphic Era Deemed to be UniversityDepartment of Climate Change, Indian Institute of ScienceDepartment of Civil Engineering, College of Engineering and Technology, Mattu UniversityAbstract This study investigates the thermal and mechanical performance of geopolymer concrete incorporating recycled coarse aggregate (RCA) and copper slag (CS) as sustainable alternatives to natural aggregates. The geopolymer binder comprises fly ash (FA) and ground granulated blast furnace slag (GGBS), activated by a 12 M NaOH solution. RCA replaced 30% of natural coarse aggregate to form recycled aggregate concrete (RAC), while CS replaced natural fine aggregate in 20% increments up to 100% in RCA based geopolymer concrete to study its effect on compressive, split-tensile, and flexural strengths at ambient (27 °C) and elevated temperatures (100 °C, 300 °C, 500 °C, 700 °C). The experimental findings revealed that integrating CS improved both mechanical and residual thermal properties of RCA-based geopolymer concrete up to 45% and 41%, respectively, over the control mix. The optimal mix exhibited maximum mechanical performance with 30% RCA and 40% CS. This contributes to enhanced fire resistance, sustainability, and reduced dependency on natural resources.https://doi.org/10.1038/s41598-025-15153-yGeopolymer concreteRecycled coarse aggregateCopper slagMechanical strength of concreteElevated temperature |
| spellingShingle | Anasuya Sahu Pramod Kumar Bheem Pratap Abhilash Gogineni Regasa Yadeta Sembeta Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate Scientific Reports Geopolymer concrete Recycled coarse aggregate Copper slag Mechanical strength of concrete Elevated temperature |
| title | Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate |
| title_full | Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate |
| title_fullStr | Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate |
| title_full_unstemmed | Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate |
| title_short | Thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate |
| title_sort | thermal and mechanical performance of geopolymer concrete with recycled aggregate and copper slag as fine aggregate |
| topic | Geopolymer concrete Recycled coarse aggregate Copper slag Mechanical strength of concrete Elevated temperature |
| url | https://doi.org/10.1038/s41598-025-15153-y |
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