Experimental study of the effects of mechanical restraints on ASR expansions in concrete
This paper summarizes an experimental campaign devoted to the study of the effect of (internal and external) mechanical restraints on Alkali-Silica Reaction (ASR) expansions in concrete made with sodalime (SL) glass as reactive aggregate. The campaign included the development of two new experimental...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/366732 |
| Acceso en línea: | https://hdl.handle.net/2117/366732 |
| Access Level: | acceso abierto |
| Palabra clave: | Concrete--Deterioration Alkali silica reactions Concrete ASR Stress state Glass Interface Formigó -- Deterioració Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigó |
| Sumario: | This paper summarizes an experimental campaign devoted to the study of the effect of (internal and external) mechanical restraints on Alkali-Silica Reaction (ASR) expansions in concrete made with sodalime (SL) glass as reactive aggregate. The campaign included the development of two new experimental setups. The first setup made it possible to measure ASR expansion curves at the level of a single interface between a reactive aggregate and a cementitious matrix. For this purpose, small sandwich-like specimens, with cement paste or mortar on top and bottom of a disc of SL glass in the middle, were used. For the second experimental setup, a true-triaxial machine was used to obtain ASR expansion curves of concrete cubical specimens subjected to three different triaxial stress states. Based on the results obtained, a reaction-expansion mechanism is proposed that might explain the effects of the stress state on the ASR expansions of concrete. |
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