Influence of the segregation phenomenon on structural efficiency of lightweight aggregate concretes
Lightweight aggregate concretes (LWAC) are versatile and interesting materials for projects that require greater structural efficiency. Due to the difference that exists between the densities of the materials used in these types of concrete, during transport and mainly compaction, their aggregates t...
| Autores: | , , |
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| 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:20.500.12251/1927 |
| Acceso en línea: | http://hdl.handle.net/20.500.12251/1927 https://doi.org/10.3390/ma13245754 |
| Access Level: | acceso abierto |
| Palabra clave: | Resistencia a compresión Hormigón ligero estructural (HAL) Áridos ligeros Compactación Segregación -material- Durabilidad Material de construcción Ensayos (propiedades o materiales) Resistencia mecánica 3313.04 Material de Construcción 3305.05 Tecnología del Hormigón 3305.33 Resistencia de Estructuras 3312.08 Propiedades de Los Materiales 3312.12 Ensayo de Materiales 3312.09 Resistencia de Materiales |
| Sumario: | Lightweight aggregate concretes (LWAC) are versatile and interesting materials for projects that require greater structural efficiency. Due to the difference that exists between the densities of the materials used in these types of concrete, during transport and mainly compaction, their aggregates tend to separate from the mortar matrix, floating towards the surface, a phenomenon called segregation. Segregation in LWAC can affect its durability properties, its density, and directly affect its structural efficiency. In this work, different concrete densities (1700 kg/m3 and 1900 kg/m3) manufactured with different dosages (two different lightweight aggregates) and compaction methods (one or two layers) were analyzed to verify the impact of segregation on its structural efficiency. For this purpose, the segregation index of the LWAC was obtained by means of the image analysis technique. In addition, to obtain their structural efficiency, the density and compressive strength were obtained at different heights of the tested specimens. The results show the vibration of the samples in two layers leads to a more efficient elimination of trapped air, a reduction in the risk of segregation, and better structural efficiency. © 2020 by the authors. Licensee MDPI, Basel, Switzerland. |
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