Influence of citric acid on the fire behavior of gypsum coatings of construction and structural elements
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Castellón Guillén, Francisco José; Ayala Tomás, Manuel; Flores Yepes, José Antonio; Lanzón Torres, Juan MarcosÁrea de conocimiento
Mecánica de Medios Continuos y Teoría de EstructurasFecha de publicación
2021Editorial
Consejo Superior de Investigaciones CientíficasCita bibliográfica
Castellón, F., Ayala, M., Flores, J., & Lanzón, M. (2021). Influence of citric acid on the fire behavior of gypsum coatings of construction and structural elements. Materiales De Construcción, 71(342), e248. https://doi.org/10.3989/mc.2021.13120Palabras clave
GypsumCitric acid
Fire
Temperature
Passive protection
Yeso
Ácido cítrico
Fuego
Temperatura
Protección pasiva
Resumen
[ENG] To improve the workability in gypsum plasters, additives are sometimes used, including citric acid, which provides acceptable setting times for low w/g ratios, maximizing the mechanical properties of the material. The influence of citric acid on the fire response of gypsum coatings is not well known, and so our aim was to analyze the effects that citric acid produces on the behavior of gypsum plasters exposed to fire. Temperature measurements were made with sensors and thermal imaging cameras while other instrumental techniques, including SEM, XRD and TG, were used to characterize the microstructure and composition of gypsum materials subjected to the action of fire. The fire had a greater effect on gypsum plasters containing citric acid as revealed by the cracking patterns and heat propagation profiles observed. Likewise, micro-cracks were observed in gypsum specimens, containing and non-containing citric acid, exposed to fire. In all cases, the alterations were consistent with ...
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