Efectos de la temperatura en la expansión del hormigón por la reacción álcali-sílice: una aproximación numérica simplificad
DOI:
https://doi.org/10.3989/mc.2022.17121Palabras clave:
Temperatura, Reacción álcali-sílice, Expansión, Simulación numérica, Ensayo de prismas de hormigónResumen
Se evaluaron los efectos de la temperatura en el comportamiento expansivo del hormigón debido a la reacción álcali-sílice (ASR) mediante un análisis numérico simplificado. Los modelos numéricos se construyeron en base a la revisión de la literatura. Se implementó un modelo simplificado de daños para capturar las interacciones entre la viscoelsasticidad del gel (ASR) y el daño microestructural del árido y la pasta. Los parámetros del modelo de daños se identificaron mediante el ajuste de los resultados simulados a los datos experimentales. Los resultados indican que, para una determinada relación de reacción, la capacidad de expansión se reduce a temperaturas más altas durante las primeras y últimas etapas de la misma. Los resultados demuestran que la modelización explícita de las interacciones mecano-químicas es importante para conseguir predicciones numéricas precisas del comportamiento expansivo.
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