Effect of the expanded perlite dose on the fire performance of gypsum plasters
| Autor: | Marcos Lanzón, Francisco José Castellón, Manuel Ayala |
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| Přispěvatelé: | Universidad Politécnica de Cartagena |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
History
Polymers and Plastics Lightweight plasters Characterisation Expresión Gráfica Arquitectónica Fire protection 6201 Arquitectura Building and Construction Expanded perlite Industrial and Manufacturing Engineering Construcciones Arquitectónicas 3305 Tecnología de la Construcción General Materials Science Business and International Management Civil and Structural Engineering |
| Popis: | Gypsum plasters are often used in buildings to provide passive protection against fire. This paper studies the fire behaviour of lightweight plasters containing moderate and high doses of expanded perlite. A propane flame was used to study the heat transmission through the plaster from the exposed side to the back side (2 cm thickness) using an IR camera. The microstructural and mineralogical variations induced by fire were analysed by scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) using micro-perforated lids to improve the resolution (separation) of endothermic peaks of gypsum and bassanite. The exposed side of the plasters was drastically affected by fire regardless the concentration of perlite. However, important differences were found in the non-exposed side depending on the used amount of perlite. The greatest alteration was observed for high doses of perlite (6.5 % w/w) followed by control samples (0 % w/w). By contrast, using moderate doses of perlite (2.0 % w/w) the plasters showed excellent fire performance and CaSO4 2H2O was well preserved. The results suggest that the incorporation of lightweight materials to plasters should be carefully adjusted to ensure appropriate fire protection. The support given by the Technical University of Cartagena, UPCT is greatly appreciated (Ref: 3005216651; D023-09: Advanced mortars for building and architectural restoration). The authors want also to express their gratitude to Vicente Muñoz and Alberto Alcolea from SAIT laboratory at UPCT, who help us to overcome practical limitations of thermal analysis. |
| Databáze: | OpenAIRE |
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