Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar
The long-term bond degradation and strength retention of flexural bond prisms strengthened with carbon fiber-reinforced polymer (CFRP) composite and galvanized steel mesh (GSM) systems, bonded to concrete using epoxy adhesives and cement-based mortar under aggressive conditioning regimes are compare...
محفوظ في:
| المؤلف الرئيسي: | |
|---|---|
| مؤلفون آخرون: | , , , , |
| التنسيق: | article |
| منشور في: |
2024
|
| الموضوعات: | |
| الوصول للمادة أونلاين: | http://dx.doi.org/10.1016/j.jcomc.2024.100493 https://www.sciencedirect.com/science/article/pii/S2666682024000628 http://hdl.handle.net/10576/64332 |
| الوسوم: |
إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
|
| _version_ | 1857415085253722112 |
|---|---|
| author | Hawileh, Rami |
| author2 | Douier, Kais Gowrishankar, Prathibha Abdalla, Jamal A. Nuaimi, Nasser Al Sohail, Muazzam Ghous |
| author2_role | author author author author author |
| author_facet | Hawileh, Rami Douier, Kais Gowrishankar, Prathibha Abdalla, Jamal A. Nuaimi, Nasser Al Sohail, Muazzam Ghous |
| author_role | author |
| dc.creator.none.fl_str_mv | Hawileh, Rami Douier, Kais Gowrishankar, Prathibha Abdalla, Jamal A. Nuaimi, Nasser Al Sohail, Muazzam Ghous |
| dc.date.none.fl_str_mv | 2024-07-31 2025-04-20T10:24:55Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://dx.doi.org/10.1016/j.jcomc.2024.100493 26666820 https://www.sciencedirect.com/science/article/pii/S2666682024000628 http://hdl.handle.net/10576/64332 14 |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Durability Bond strength Bond degradation CFRP Galvanized steel mesh Strengthening Aggressive conditioning |
| dc.title.none.fl_str_mv | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| dc.type.none.fl_str_mv | Article info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | The long-term bond degradation and strength retention of flexural bond prisms strengthened with carbon fiber-reinforced polymer (CFRP) composite and galvanized steel mesh (GSM) systems, bonded to concrete using epoxy adhesives and cement-based mortar under aggressive conditioning regimes are compared in this paper. Notched prisms strengthened using low-cord density steel mesh (LSM) with epoxy (SME-strengthened) and cement mortar (SMM-strengthened), and CFRP-epoxy systems were weathered under saline water and direct sunlight for a period of 28 and 540 days. The results of the study were analyzed based on experimentally obtained ultimate load (Pu) values and empirically calculated average bond shear stress (τavg) and prism strength retention (Rp) values. The bond strength degraded by 39 and 34 % in CFRP strengthened, 2.9 and 33 % in SME strengthened, and 2.8 and 10.8 % in SMM-strengthened specimens following the 540-day exposure to saline water and direct sunlight, respectively. The average prism retention ratio was calculated to be 0.61 and 0.66 for CFRP-strengthened, 0.97 and 0.67 for SME-strengthened, and 0.97 and 0.89 for SMM-strengthened specimens after 540 days of saline water and direct sunlight exposure. Flexural prism environment strength reduction factors (CE) were proposed as 0.60, 0.95, and 0.95 for CFRP, SME, and SMM-strengthened specimens under saline water exposures and 0.65, 0.65, and 0.85 for CFRP, SME, and SMM strengthened specimens under direct sunlight exposures. Saline water exposure was observed to be most critical to all strengthening systems. Although CFRP-strengthened specimens showed minimum degradation in load-carrying capacity under both conditioning regimes, they showed maximum bond strength reduction in contrast to SMM-strengthened specimens. It was observed that the choice of bonding agent significantly influenced the extent of bond strength degradation under extreme exposure regimes, like those that prevail in the UAE and the Persian Gulf. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | qu_7feedf910218bb1f6b837ef3f8116fe6 |
| identifier_str_mv | 26666820 14 |
| language_invalid_str_mv | en |
| network_acronym_str | qu |
| network_name_str | Qatar University repository |
| oai_identifier_str | oai:qspace.qu.edu.qa:10576/64332 |
| publishDate | 2024 |
| publisher.none.fl_str_mv | Elsevier |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| spelling | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortarHawileh, RamiDouier, KaisGowrishankar, PrathibhaAbdalla, Jamal A.Nuaimi, Nasser AlSohail, Muazzam GhousDurabilityBond strengthBond degradationCFRPGalvanized steel meshStrengtheningAggressive conditioningThe long-term bond degradation and strength retention of flexural bond prisms strengthened with carbon fiber-reinforced polymer (CFRP) composite and galvanized steel mesh (GSM) systems, bonded to concrete using epoxy adhesives and cement-based mortar under aggressive conditioning regimes are compared in this paper. Notched prisms strengthened using low-cord density steel mesh (LSM) with epoxy (SME-strengthened) and cement mortar (SMM-strengthened), and CFRP-epoxy systems were weathered under saline water and direct sunlight for a period of 28 and 540 days. The results of the study were analyzed based on experimentally obtained ultimate load (Pu) values and empirically calculated average bond shear stress (τavg) and prism strength retention (Rp) values. The bond strength degraded by 39 and 34 % in CFRP strengthened, 2.9 and 33 % in SME strengthened, and 2.8 and 10.8 % in SMM-strengthened specimens following the 540-day exposure to saline water and direct sunlight, respectively. The average prism retention ratio was calculated to be 0.61 and 0.66 for CFRP-strengthened, 0.97 and 0.67 for SME-strengthened, and 0.97 and 0.89 for SMM-strengthened specimens after 540 days of saline water and direct sunlight exposure. Flexural prism environment strength reduction factors (CE) were proposed as 0.60, 0.95, and 0.95 for CFRP, SME, and SMM-strengthened specimens under saline water exposures and 0.65, 0.65, and 0.85 for CFRP, SME, and SMM strengthened specimens under direct sunlight exposures. Saline water exposure was observed to be most critical to all strengthening systems. Although CFRP-strengthened specimens showed minimum degradation in load-carrying capacity under both conditioning regimes, they showed maximum bond strength reduction in contrast to SMM-strengthened specimens. It was observed that the choice of bonding agent significantly influenced the extent of bond strength degradation under extreme exposure regimes, like those that prevail in the UAE and the Persian Gulf.The support for the research conducted was provided partially by the Faculty Research Grant program of the American University of Sharjah, Riadh Al-Sadek Endowed Chair in Civil Engineering, and by the National Priorities Research Program of the Qatar National Research Fund (a member of the Qatar Foundation) under the award no. 8-418-2-175. All support received is gratefully appreciated. The support for publication of this paper was provided by the Open Access Program (OAP) of the American University of Sharjah. This paper represents the opinion of the authors and does not mean to represent the opinions of the American University of Sharjah.Elsevier2025-04-20T10:24:55Z2024-07-31Articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://dx.doi.org/10.1016/j.jcomc.2024.10049326666820https://www.sciencedirect.com/science/article/pii/S2666682024000628http://hdl.handle.net/10576/6433214enhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:qspace.qu.edu.qa:10576/643322025-04-20T19:07:53Z |
| spellingShingle | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar Hawileh, Rami Durability Bond strength Bond degradation CFRP Galvanized steel mesh Strengthening Aggressive conditioning |
| status_str | publishedVersion |
| title | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| title_full | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| title_fullStr | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| title_full_unstemmed | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| title_short | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| title_sort | Durability of externally strengthened concrete prisms with CFRP laminates and galvanized steel mesh attached with epoxy adhesives and mortar |
| topic | Durability Bond strength Bond degradation CFRP Galvanized steel mesh Strengthening Aggressive conditioning |
| url | http://dx.doi.org/10.1016/j.jcomc.2024.100493 https://www.sciencedirect.com/science/article/pii/S2666682024000628 http://hdl.handle.net/10576/64332 |