Thermal deformability of recycled self-compacting concrete under cyclical temperature variations
Recycled Concrete Aggregate (RCA) has greater elasticity than natural aggregate, due to the presence of adhered hydrated mortar in the coarse fraction, and mortar particles in the fine fraction. To evaluate this aspect under temperature variations, four Self-Compacting Concretes (SCC) made with 100%...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universidad de Burgos (UBU) |
| Repositorio: | Repositorio Institucional de la Universidad de Burgos (RIUBU) |
| OAI Identifier: | oai:riubu.ubu.es:10259/8059 |
| Acceso en línea: | http://hdl.handle.net/10259/8059 |
| Access Level: | acceso abierto |
| Palabra clave: | Recycled concrete aggregate (RCA) Self-compacting concrete (SCC) Cyclical temperature variations Thermal deformability Thermal remaining strain Linear thermal expansion coefficient Ingeniería civil Materiales de construcción Civil engineering Building materials |
| Sumario: | Recycled Concrete Aggregate (RCA) has greater elasticity than natural aggregate, due to the presence of adhered hydrated mortar in the coarse fraction, and mortar particles in the fine fraction. To evaluate this aspect under temperature variations, four Self-Compacting Concretes (SCC) made with 100% coarse and/ or fine RCA were subjected to cyclical temperature variations between 70 C and 20 C and between 15 C and 20 C. The addition of RCA, especially in the coarse fraction, increased the thermal deformability, although the difference tended to decrease with the number of cycles, especially in positive temperature variations. This study concludes that the traditional upper limit of the linear thermal expansion coefficient for concrete (1.210 5 C 1) is also suitable when RCA is incorporated. |
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