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: | , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Consejo General de la Arquitectura Técnica de España (CGATE) |
| Repositorio: | RIARTE |
| OAI Identifier: | oai:www.riarte.es:20.500.12251/2008 |
| Acceso en línea: | http://hdl.handle.net/20.500.12251/2008 https://doi.org/10.1016/j.matlet.2020.128417 |
| Access Level: | acceso abierto |
| Palabra clave: | Gradiente de temperatura Temperatura de referencia Comportamiento térmico Material de construcción Deformabilidad Hormigón reciclado Hormigón Autocompactante (HAC) Morteros - Construcción Reciclaje - Construcción Ensayos (propiedades o materiales) 3313.04 Material de Construcción 3305.05 Tecnología del Hormigón 3312.08 Propiedades de Los Materiales 3312.12 Ensayo de Materiales 3308.02 Residuos Industriales 3311.16 Instrumentos de Medida de la Temperatura 3312.09 Resistencia de Materiales |
| 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 (1.2·10−5 °C−1) is also suitable when RCA is incorporated. © 2020 Elsevier B.V. |
|---|