Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs
This study investigates an innovative approach to strengthening two-way reinforced concrete (RC) slabs using ferrocement strips strategically placed instead of full layers across the slab area. The research explores the effectiveness of various strip configurations, including orthogonal and diagonal...
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| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525001123 |
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| author | Galal Elsamak Mohamed Ghalla Moataz Badawi Abdullah Albogami Taher A. Tawfik Ramy I. Shahin |
| author_facet | Galal Elsamak Mohamed Ghalla Moataz Badawi Abdullah Albogami Taher A. Tawfik Ramy I. Shahin |
| author_sort | Galal Elsamak |
| collection | DOAJ |
| description | This study investigates an innovative approach to strengthening two-way reinforced concrete (RC) slabs using ferrocement strips strategically placed instead of full layers across the slab area. The research explores the effectiveness of various strip configurations, including orthogonal and diagonal arrangements, bonded with either epoxy alone or epoxy combined with steel anchors. By replacing a portion of the slab's concrete cover with ferrocement strips, this method aims to enhance the load-carrying capacity, ductility, and crack resistance of the slabs while optimizing material usage and minimizing additional weight. Experimental results revealed that all strengthened specimens demonstrated improved ultimate load capacities compared to the control slab, with enhancements ranging from 12 % to 33 %. Orthogonal configurations consistently outperformed diagonal arrangements, while anchoring the strip ends further increased load-carrying capacity by 4.1–5.7 %. Adding a second layer of welded steel mesh (WSM) provided modest improvements (5.4–5.9 %) in load capacity. Numerical analysis revealed that increasing the WSM reinforcement ratio, combined with full-length anchoring, shifted the primary failure mode from intermediate debonding (ID) to a more favorable ductile flexural failure. Finite element (FE) modeling complemented the experimental findings by providing valuable insights into stress distribution and failure mechanisms. The model highlighted the progression of stresses leading to ID failure and demonstrated how varying reinforcement ratios and anchoring methods influence the structural performance of the strengthened slabs. |
| format | Article |
| id | doaj-art-34ecb5aab5e84eb8985f9e070d0da0b1 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-34ecb5aab5e84eb8985f9e070d0da0b12025-02-06T05:11:48ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04314Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabsGalal Elsamak0Mohamed Ghalla1Moataz Badawi2Abdullah Albogami3Taher A. Tawfik4Ramy I. Shahin5Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, EgyptCivil Engineering Department, Faculty of Engineering, Kafrelsheikh University, Kafrelsheikh, Egypt; Corresponding author.Civil Engineering Department, College of Engineering and Architecture, Umm Al-Qura University, Makkah, Saudi ArabiaDepartment of Civil Engineering, Faculty of Engineering, Al-Baha University, Al-Baha 65779, Saudi ArabiaInstitute of Construction and Architecture, Slovak Academy of Sciences, Dúbravsk´a cesta 9, Bratislava SK-845 03, Slovakia; Department of Construction and Building Engineering, High Institute of Engineering, October 6 City, Egypt; Corresponding author at: Institute of Construction and Architecture, Slovak Academy of Sciences, Dúbravsk´a cesta 9, Bratislava SK-845 03, Slovakia.Civil Engineering Department, Higher Institute of Engineering and Technology, Kafrelsheikh, EgyptThis study investigates an innovative approach to strengthening two-way reinforced concrete (RC) slabs using ferrocement strips strategically placed instead of full layers across the slab area. The research explores the effectiveness of various strip configurations, including orthogonal and diagonal arrangements, bonded with either epoxy alone or epoxy combined with steel anchors. By replacing a portion of the slab's concrete cover with ferrocement strips, this method aims to enhance the load-carrying capacity, ductility, and crack resistance of the slabs while optimizing material usage and minimizing additional weight. Experimental results revealed that all strengthened specimens demonstrated improved ultimate load capacities compared to the control slab, with enhancements ranging from 12 % to 33 %. Orthogonal configurations consistently outperformed diagonal arrangements, while anchoring the strip ends further increased load-carrying capacity by 4.1–5.7 %. Adding a second layer of welded steel mesh (WSM) provided modest improvements (5.4–5.9 %) in load capacity. Numerical analysis revealed that increasing the WSM reinforcement ratio, combined with full-length anchoring, shifted the primary failure mode from intermediate debonding (ID) to a more favorable ductile flexural failure. Finite element (FE) modeling complemented the experimental findings by providing valuable insights into stress distribution and failure mechanisms. The model highlighted the progression of stresses leading to ID failure and demonstrated how varying reinforcement ratios and anchoring methods influence the structural performance of the strengthened slabs.http://www.sciencedirect.com/science/article/pii/S2214509525001123Two-way slabsFerrocement stripsFlexural strengtheningStrain hardening cementitious compositeFinite element modelingAbsorbed energy |
| spellingShingle | Galal Elsamak Mohamed Ghalla Moataz Badawi Abdullah Albogami Taher A. Tawfik Ramy I. Shahin Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs Case Studies in Construction Materials Two-way slabs Ferrocement strips Flexural strengthening Strain hardening cementitious composite Finite element modeling Absorbed energy |
| title | Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs |
| title_full | Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs |
| title_fullStr | Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs |
| title_full_unstemmed | Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs |
| title_short | Anchored and epoxied ferrocement strips for improving flexural performance of two-way reinforced concrete slabs |
| title_sort | anchored and epoxied ferrocement strips for improving flexural performance of two way reinforced concrete slabs |
| topic | Two-way slabs Ferrocement strips Flexural strengthening Strain hardening cementitious composite Finite element modeling Absorbed energy |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525001123 |
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