Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion
Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfac...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhang, Fuwen [verfasserIn] |
|---|
| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021 |
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| Schlagwörter: |
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| Anmerkung: |
© RILEM 2021 |
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| Übergeordnetes Werk: |
Enthalten in: Materials and structures - Springer Netherlands, 1985, 54(2021), 2 vom: 23. Feb. |
|---|---|
| Übergeordnetes Werk: |
volume:54 ; year:2021 ; number:2 ; day:23 ; month:02 |
| Links: |
|---|
| DOI / URN: |
10.1617/s11527-021-01641-w |
|---|
| Katalog-ID: |
OLC2123937797 |
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| 520 | |a Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. | ||
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| 700 | 1 | |a Wang, Mingqian |4 aut | |
| 700 | 1 | |a Leng, Yubing |4 aut | |
| 700 | 1 | |a Xu, Qingfeng |4 aut | |
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10.1617/s11527-021-01641-w doi (DE-627)OLC2123937797 (DE-He213)s11527-021-01641-w-p DE-627 ger DE-627 rakwb eng 690 VZ Zhang, Fuwen verfasserin aut Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © RILEM 2021 Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. CFRP reinforcement Concrete Water immersion Bond durability Interfacial fracture energy Dai, Jian-Guo aut Wang, Zhuolin aut Wang, Mingqian aut Leng, Yubing aut Xu, Qingfeng aut Enthalten in Materials and structures Springer Netherlands, 1985 54(2021), 2 vom: 23. Feb. (DE-627)12938240X (DE-600)165630-2 (DE-576)014768240 1359-5997 nnns volume:54 year:2021 number:2 day:23 month:02 https://doi.org/10.1617/s11527-021-01641-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC GBV_ILN_20 GBV_ILN_2016 AR 54 2021 2 23 02 |
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10.1617/s11527-021-01641-w doi (DE-627)OLC2123937797 (DE-He213)s11527-021-01641-w-p DE-627 ger DE-627 rakwb eng 690 VZ Zhang, Fuwen verfasserin aut Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © RILEM 2021 Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. CFRP reinforcement Concrete Water immersion Bond durability Interfacial fracture energy Dai, Jian-Guo aut Wang, Zhuolin aut Wang, Mingqian aut Leng, Yubing aut Xu, Qingfeng aut Enthalten in Materials and structures Springer Netherlands, 1985 54(2021), 2 vom: 23. Feb. (DE-627)12938240X (DE-600)165630-2 (DE-576)014768240 1359-5997 nnns volume:54 year:2021 number:2 day:23 month:02 https://doi.org/10.1617/s11527-021-01641-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC GBV_ILN_20 GBV_ILN_2016 AR 54 2021 2 23 02 |
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10.1617/s11527-021-01641-w doi (DE-627)OLC2123937797 (DE-He213)s11527-021-01641-w-p DE-627 ger DE-627 rakwb eng 690 VZ Zhang, Fuwen verfasserin aut Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © RILEM 2021 Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. CFRP reinforcement Concrete Water immersion Bond durability Interfacial fracture energy Dai, Jian-Guo aut Wang, Zhuolin aut Wang, Mingqian aut Leng, Yubing aut Xu, Qingfeng aut Enthalten in Materials and structures Springer Netherlands, 1985 54(2021), 2 vom: 23. Feb. (DE-627)12938240X (DE-600)165630-2 (DE-576)014768240 1359-5997 nnns volume:54 year:2021 number:2 day:23 month:02 https://doi.org/10.1617/s11527-021-01641-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC GBV_ILN_20 GBV_ILN_2016 AR 54 2021 2 23 02 |
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10.1617/s11527-021-01641-w doi (DE-627)OLC2123937797 (DE-He213)s11527-021-01641-w-p DE-627 ger DE-627 rakwb eng 690 VZ Zhang, Fuwen verfasserin aut Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © RILEM 2021 Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. CFRP reinforcement Concrete Water immersion Bond durability Interfacial fracture energy Dai, Jian-Guo aut Wang, Zhuolin aut Wang, Mingqian aut Leng, Yubing aut Xu, Qingfeng aut Enthalten in Materials and structures Springer Netherlands, 1985 54(2021), 2 vom: 23. Feb. (DE-627)12938240X (DE-600)165630-2 (DE-576)014768240 1359-5997 nnns volume:54 year:2021 number:2 day:23 month:02 https://doi.org/10.1617/s11527-021-01641-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC GBV_ILN_20 GBV_ILN_2016 AR 54 2021 2 23 02 |
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10.1617/s11527-021-01641-w doi (DE-627)OLC2123937797 (DE-He213)s11527-021-01641-w-p DE-627 ger DE-627 rakwb eng 690 VZ Zhang, Fuwen verfasserin aut Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion 2021 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © RILEM 2021 Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. CFRP reinforcement Concrete Water immersion Bond durability Interfacial fracture energy Dai, Jian-Guo aut Wang, Zhuolin aut Wang, Mingqian aut Leng, Yubing aut Xu, Qingfeng aut Enthalten in Materials and structures Springer Netherlands, 1985 54(2021), 2 vom: 23. Feb. (DE-627)12938240X (DE-600)165630-2 (DE-576)014768240 1359-5997 nnns volume:54 year:2021 number:2 day:23 month:02 https://doi.org/10.1617/s11527-021-01641-w lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-ARC SSG-OLC-TEC GBV_ILN_20 GBV_ILN_2016 AR 54 2021 2 23 02 |
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Materials and structures |
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Materials and structures |
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eng |
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600 - Technology |
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2021 |
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Zhang, Fuwen Dai, Jian-Guo Wang, Zhuolin Wang, Mingqian Leng, Yubing Xu, Qingfeng |
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54 |
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Zhang, Fuwen |
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10.1617/s11527-021-01641-w |
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690 |
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bond durability of epoxy and cement- bonded cfrp reinforcement to concrete interfaces subject to water immersion |
| title_auth |
Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion |
| abstract |
Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. © RILEM 2021 |
| abstractGer |
Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. © RILEM 2021 |
| abstract_unstemmed |
Abstract Durability is a critical concern for concrete structures externally bonded with fiber-reinforced polymer reinforcement. This paper presents the results from an experimental study which compared the bond durability of epoxy-bonded CFRP sheets and cement-bonded CFRP grids to concrete interfaces subjected to water immersion. Totally twelve groups of CFRP sheet or grid-strengthened concrete beams with a notch at their midspan were carefully fabricated through epoxy- and cement-based bonding systems and tested under monotonic loading before and after water immersion exposure, respectively. The cement binder included polymer cement mortar (PCM) and ductile engineered cementitious composite (ECC). The CFRP grids and sheets were designed with the similar tensile stiffness. The duration of water immersion ranged from 0 to 6 months. The test results indicated that debonding in concrete adjacent to the concrete-adhesive interface in accompany with a diagonal concrete crack near the notch was the main failure mode of the beams strengthened with epoxy-bonded CFRP sheet and ECC-bonded CFRP grid, while the tearing off of CFRP grids from the PCM matrix was the main failure mode of the beams strengthened with PCM-bonded CFRP grids. After water immersion exposure, the ultimate loads of the beams with cement-based CFRP grids were at least 50% higher than their epoxy-bonded counterparts, confirming the superior moisture durability of cement based bond to epoxy-bonded ones. The interfacial fracture energy was found to exhibit an exponential decline trend with water immersion duration. © RILEM 2021 |
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Bond durability of epoxy and cement- bonded CFRP reinforcement to concrete interfaces subject to water immersion |
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Dai, Jian-Guo Wang, Zhuolin Wang, Mingqian Leng, Yubing Xu, Qingfeng |
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