Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials
While the development of sustainable construction materials, such as green concrete made from glass waste or recycled concrete aggregate, has been extensively researched, much of the existing work has focused narrowly on these two components. This limited scope highlights the need for further invest...
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MDPI AG
2025-04-01
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| Online Access: | https://www.mdpi.com/2075-5309/15/9/1420 |
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| author | Sabry Fayed Ayman El-Zohairy Hani Salim Ehab A. Mlybari Rabeea W. Bazuhair Mohamed Ghalla |
| author_facet | Sabry Fayed Ayman El-Zohairy Hani Salim Ehab A. Mlybari Rabeea W. Bazuhair Mohamed Ghalla |
| author_sort | Sabry Fayed |
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| description | While the development of sustainable construction materials, such as green concrete made from glass waste or recycled concrete aggregate, has been extensively researched, much of the existing work has focused narrowly on these two components. This limited scope highlights the need for further investigation to comprehensively address their drawbacks and expand the available knowledge base. Moreover, the current study uniquely emphasizes the shear response of green concrete, a critical aspect that has not been previously explored. Push-off shear samples made of green concrete, a mixture of recycled concrete, and glass waste, were built and subjected to direct shear loading testing to investigate shear response. In different proportions (0, 10, 25, 50, and 100%), fine glass aggregate is used in place of river sand. At different ratios (0, 10, 20, and 40%), coarse glass aggregate was substituted for coarse natural aggregate to form four mixtures. Additionally, recycled concrete and coarse glass aggregates were utilized instead of coarse natural aggregates. In the last group, coarse natural aggregate was substituted with recycled concrete aggregates in different proportions (0, 16, 40, and 80%). Measurements were made of the applied shear force and the sliding of the shear transfer plane during the test. The tested mixtures’ failure, shear strength, shear slip, shear stiffness, and shear stress slip correlations were examined. According to the results, all of the samples failed in the shear transfer plane. The shear strength of mixes containing 10, 25, 50, and 100% fine glass was, respectively, 12.8%, 14.7%, 29.5%, and 39% lower than the control combination without fine glass. As the amount of recycled glass and concrete materials grew, so did the shear slip at the shear transfer plane. In recent years, numerous studies have proposed formulas to predict the push-off shear strength of plain concrete, primarily using compressive strength as the key parameter—often without accounting for the influence of infill materials. The present study introduces an improved predictive model that incorporates the contents of recycled concrete aggregate, coarse glass aggregate, or fine glass aggregate as correction factors to enhance accuracy. |
| format | Article |
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| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-704a6c86f2ce4a758e9614483ede4d5e2025-08-20T01:50:45ZengMDPI AGBuildings2075-53092025-04-01159142010.3390/buildings15091420Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction MaterialsSabry Fayed0Ayman El-Zohairy1Hani Salim2Ehab A. Mlybari3Rabeea W. Bazuhair4Mohamed Ghalla5Civil Engineering Department, Kafrelsheikh University, Kafr El-Sheikh 6860404, EgyptDepartment of Engineering and Technology, East Texas A&M University, Commerce, TX 75429, USACivil and Environmental Engineering, University of Missouri, Columbia, MO 65211, USADepartment of Civil Engineering, College of Engineering and Architecture, Umm Al-Qura University, Makkah 24382, Saudi ArabiaDepartment of Civil Engineering, College of Engineering and Architecture, Umm Al-Qura University, Makkah 24382, Saudi ArabiaCivil Engineering Department, Kafrelsheikh University, Kafr El-Sheikh 6860404, EgyptWhile the development of sustainable construction materials, such as green concrete made from glass waste or recycled concrete aggregate, has been extensively researched, much of the existing work has focused narrowly on these two components. This limited scope highlights the need for further investigation to comprehensively address their drawbacks and expand the available knowledge base. Moreover, the current study uniquely emphasizes the shear response of green concrete, a critical aspect that has not been previously explored. Push-off shear samples made of green concrete, a mixture of recycled concrete, and glass waste, were built and subjected to direct shear loading testing to investigate shear response. In different proportions (0, 10, 25, 50, and 100%), fine glass aggregate is used in place of river sand. At different ratios (0, 10, 20, and 40%), coarse glass aggregate was substituted for coarse natural aggregate to form four mixtures. Additionally, recycled concrete and coarse glass aggregates were utilized instead of coarse natural aggregates. In the last group, coarse natural aggregate was substituted with recycled concrete aggregates in different proportions (0, 16, 40, and 80%). Measurements were made of the applied shear force and the sliding of the shear transfer plane during the test. The tested mixtures’ failure, shear strength, shear slip, shear stiffness, and shear stress slip correlations were examined. According to the results, all of the samples failed in the shear transfer plane. The shear strength of mixes containing 10, 25, 50, and 100% fine glass was, respectively, 12.8%, 14.7%, 29.5%, and 39% lower than the control combination without fine glass. As the amount of recycled glass and concrete materials grew, so did the shear slip at the shear transfer plane. In recent years, numerous studies have proposed formulas to predict the push-off shear strength of plain concrete, primarily using compressive strength as the key parameter—often without accounting for the influence of infill materials. The present study introduces an improved predictive model that incorporates the contents of recycled concrete aggregate, coarse glass aggregate, or fine glass aggregate as correction factors to enhance accuracy.https://www.mdpi.com/2075-5309/15/9/1420recycled glass aggregaterecycled concrete aggregatepush-off shear testgreen concreteshear slipoptimization |
| spellingShingle | Sabry Fayed Ayman El-Zohairy Hani Salim Ehab A. Mlybari Rabeea W. Bazuhair Mohamed Ghalla Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials Buildings recycled glass aggregate recycled concrete aggregate push-off shear test green concrete shear slip optimization |
| title | Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials |
| title_full | Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials |
| title_fullStr | Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials |
| title_full_unstemmed | Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials |
| title_short | Shear Strength of Concrete Incorporating Recycled Optimized Concrete and Glass Waste Aggregates as Sustainable Construction Materials |
| title_sort | shear strength of concrete incorporating recycled optimized concrete and glass waste aggregates as sustainable construction materials |
| topic | recycled glass aggregate recycled concrete aggregate push-off shear test green concrete shear slip optimization |
| url | https://www.mdpi.com/2075-5309/15/9/1420 |
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