Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO
The replacement of virgin aggregate with recycled concrete aggregate (RCA) in concrete mixtures offers an eco-strategy to mitigate the environmental limitations linked with traditional recycling techniques of RCA. However, the inferior properties of RCA, in contrast to virgin aggregate, present an o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/14/2/353 |
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| author | Mazen J. Al-Kheetan Yazeed S. Jweihan Musab Rabi Seyed Hamidreza Ghaffar |
| author_facet | Mazen J. Al-Kheetan Yazeed S. Jweihan Musab Rabi Seyed Hamidreza Ghaffar |
| author_sort | Mazen J. Al-Kheetan |
| collection | DOAJ |
| description | The replacement of virgin aggregate with recycled concrete aggregate (RCA) in concrete mixtures offers an eco-strategy to mitigate the environmental limitations linked with traditional recycling techniques of RCA. However, the inferior properties of RCA, in contrast to virgin aggregate, present an obstacle to efficiently proceeding with this approach. Therefore, the aim of this study is to enhance the characteristics of concrete that contains RCA using nano-ZnO particles. Virgin aggregate was replaced with RCA in 30 wt.% and 50 wt.% ratios, followed by the addition of 0.5 wt.% nano-ZnO. The performance of concrete mixtures was evaluated in terms of their physical, mechanical, and durability properties. The addition of nano-ZnO particles to concrete with RCA resulted in refining its pore structure and reducing its water absorption, where the impermeability of concrete with 30 wt.% and 50 wt.% treated RCA decreased by 14.5% and 18%, respectively. Moreover, nano-ZnO treatment increased the compressive strength of mixtures with 30 wt.% and 50 wt.% RCA by 2.8% and 4%, respectively. All mixtures underwent a reduction in their 28-day compressive strength after exposure to a 5% sulphuric acid solution, where concrete with 30 wt.% and 50 wt.% RCA showed 20.2% and 22.8% strength loss, respectively. However, there was a 17.6% and 19.6% drop in the compressive strength of concrete with 30 wt.% and 50 wt.% RCA and treated with nano-ZnO. |
| first_indexed | 2024-03-07T22:39:42Z |
| format | Article |
| id | doaj.art-67730d9f31564ab9a954b794c1feca85 |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-07T22:39:42Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-67730d9f31564ab9a954b794c1feca852024-02-23T15:09:59ZengMDPI AGBuildings2075-53092024-01-0114235310.3390/buildings14020353Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnOMazen J. Al-Kheetan0Yazeed S. Jweihan1Musab Rabi2Seyed Hamidreza Ghaffar3Civil and Environmental Engineering Department, College of Engineering, Mutah University, P.O. Box 7, Mutah 61710, JordanCivil and Environmental Engineering Department, College of Engineering, Mutah University, P.O. Box 7, Mutah 61710, JordanDepartment of Civil Engineering, Jerash University, P.O. Box 311, Jerash 26150, JordanDepartment of Engineering, University of Birmingham, Dubai International Academic City, Dubai 341799, United Arab EmiratesThe replacement of virgin aggregate with recycled concrete aggregate (RCA) in concrete mixtures offers an eco-strategy to mitigate the environmental limitations linked with traditional recycling techniques of RCA. However, the inferior properties of RCA, in contrast to virgin aggregate, present an obstacle to efficiently proceeding with this approach. Therefore, the aim of this study is to enhance the characteristics of concrete that contains RCA using nano-ZnO particles. Virgin aggregate was replaced with RCA in 30 wt.% and 50 wt.% ratios, followed by the addition of 0.5 wt.% nano-ZnO. The performance of concrete mixtures was evaluated in terms of their physical, mechanical, and durability properties. The addition of nano-ZnO particles to concrete with RCA resulted in refining its pore structure and reducing its water absorption, where the impermeability of concrete with 30 wt.% and 50 wt.% treated RCA decreased by 14.5% and 18%, respectively. Moreover, nano-ZnO treatment increased the compressive strength of mixtures with 30 wt.% and 50 wt.% RCA by 2.8% and 4%, respectively. All mixtures underwent a reduction in their 28-day compressive strength after exposure to a 5% sulphuric acid solution, where concrete with 30 wt.% and 50 wt.% RCA showed 20.2% and 22.8% strength loss, respectively. However, there was a 17.6% and 19.6% drop in the compressive strength of concrete with 30 wt.% and 50 wt.% RCA and treated with nano-ZnO.https://www.mdpi.com/2075-5309/14/2/353recycled concrete aggregatenano-materialsdurabilitysustainability |
| spellingShingle | Mazen J. Al-Kheetan Yazeed S. Jweihan Musab Rabi Seyed Hamidreza Ghaffar Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO Buildings recycled concrete aggregate nano-materials durability sustainability |
| title | Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO |
| title_full | Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO |
| title_fullStr | Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO |
| title_full_unstemmed | Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO |
| title_short | Durability Enhancement of Concrete with Recycled Concrete Aggregate: The Role of Nano-ZnO |
| title_sort | durability enhancement of concrete with recycled concrete aggregate the role of nano zno |
| topic | recycled concrete aggregate nano-materials durability sustainability |
| url | https://www.mdpi.com/2075-5309/14/2/353 |
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