Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities
Limited research has focused on the effect of high temperatures on the textile-reinforced mortar (TRM)-to-masonry bond. In this study, masonry prisms that were furnished with double-layered TRM strips were tested under shear bond conditions after their exposure to 200 °C and 400 °C for 1 h using the...
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| Online Access: | https://www.mdpi.com/1996-1944/15/1/140 |
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| author | Paraskevi D. Askouni Catherine (Corina) G. Papanicolaou Lazar Azdejkovic |
| author_facet | Paraskevi D. Askouni Catherine (Corina) G. Papanicolaou Lazar Azdejkovic |
| author_sort | Paraskevi D. Askouni |
| collection | DOAJ |
| description | Limited research has focused on the effect of high temperatures on the textile-reinforced mortar (TRM)-to-masonry bond. In this study, masonry prisms that were furnished with double-layered TRM strips were tested under shear bond conditions after their exposure to 200 °C and 400 °C for 1 h using the single-lap/single-prism setup. A total of four TRM systems were applied sharing the same type of textile –a dry AR glass fiber one– and different matrices: two cementitious matrices, namely a normal-weight (TRCNM) and a lightweight (TRCLM) one, and two counterpart alkali-activated matrices (TRAANM and TRAALM) based on metakaolin and fly ash. Specimens’ exposure to elevated temperatures did not alter their failure mode which was due to the sleeve fibers’ rupture along with core fibers’ slippage from the mortar. The residual bond capacity of the TRM systems decreases almost linearly with increasing exposure temperature. The alkali-activated textile reinforced mortars outperformed their cement-based counterparts in terms of bond strength at every temperature. All systems retained close to 50% of their original shear bond strength after heating at 400 °C. Per the type of binder, lightweight matrices resulted in either comparable (cement-based systems) or better (alkali-activated systems) heat protection at the TRM/masonry interface. |
| first_indexed | 2024-03-10T03:34:57Z |
| format | Article |
| id | doaj.art-9eb4955e2be249c4975656c0048fa2cb |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:34:57Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9eb4955e2be249c4975656c0048fa2cb2023-11-23T11:48:42ZengMDPI AGMaterials1996-19442021-12-0115114010.3390/ma15010140Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various DensitiesParaskevi D. Askouni0Catherine (Corina) G. Papanicolaou1Lazar Azdejkovic2Department of Civil Engineering, University of Patras, Rio, 26504 Patras, GreeceDepartment of Civil Engineering, University of Patras, Rio, 26504 Patras, GreeceDepartment of Civil Engineering, University of Patras, Rio, 26504 Patras, GreeceLimited research has focused on the effect of high temperatures on the textile-reinforced mortar (TRM)-to-masonry bond. In this study, masonry prisms that were furnished with double-layered TRM strips were tested under shear bond conditions after their exposure to 200 °C and 400 °C for 1 h using the single-lap/single-prism setup. A total of four TRM systems were applied sharing the same type of textile –a dry AR glass fiber one– and different matrices: two cementitious matrices, namely a normal-weight (TRCNM) and a lightweight (TRCLM) one, and two counterpart alkali-activated matrices (TRAANM and TRAALM) based on metakaolin and fly ash. Specimens’ exposure to elevated temperatures did not alter their failure mode which was due to the sleeve fibers’ rupture along with core fibers’ slippage from the mortar. The residual bond capacity of the TRM systems decreases almost linearly with increasing exposure temperature. The alkali-activated textile reinforced mortars outperformed their cement-based counterparts in terms of bond strength at every temperature. All systems retained close to 50% of their original shear bond strength after heating at 400 °C. Per the type of binder, lightweight matrices resulted in either comparable (cement-based systems) or better (alkali-activated systems) heat protection at the TRM/masonry interface.https://www.mdpi.com/1996-1944/15/1/140textile reinforced mortar (TRM)masonrytemperaturecementitious/alkali-activated matrixnormal-weigh/lightweight aggregates |
| spellingShingle | Paraskevi D. Askouni Catherine (Corina) G. Papanicolaou Lazar Azdejkovic Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities Materials textile reinforced mortar (TRM) masonry temperature cementitious/alkali-activated matrix normal-weigh/lightweight aggregates |
| title | Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities |
| title_full | Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities |
| title_fullStr | Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities |
| title_full_unstemmed | Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities |
| title_short | Experimental Investigation of the TRM-to-Masonry Bond after Exposure to Elevated Temperatures: Cementitious and Alkali-Activated Matrices of Various Densities |
| title_sort | experimental investigation of the trm to masonry bond after exposure to elevated temperatures cementitious and alkali activated matrices of various densities |
| topic | textile reinforced mortar (TRM) masonry temperature cementitious/alkali-activated matrix normal-weigh/lightweight aggregates |
| url | https://www.mdpi.com/1996-1944/15/1/140 |
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