EVALUACIÓN DEL COMPORTAMIENTO DE ARCILLAS SOMETIDAS A DIFERENTES TIEMPOS DE EXPOSICIÓN A ALTAS TEMPERATURAS (BEHAVIOR EVALUATION OF CLAYS SUBJECTED TO DIFFERENT EXPOSURES TIMES AT HIGH TEMPERATURES)
EVALUACIÓN DEL COMPORTAMIENTO DE ARCILLAS SOMETIDAS A DIFERENTES TIEMPOS DE EXPOSICIÓN A ALTAS TEMPERATURAS (BEHAVIOR EVALUATION OF CLAYS SUBJECTED TO DIFFERENT EXPOSURES TIMES AT HIGH TEMPERATURES)
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El artículo presenta el cambio que experimentan dos arcillas en sus propiedades índice, de expansión y resistencia a la compresión inconfinada cuando se someten a altas temperaturas (150, 225 y 300 °C) durante tres tiempos de exposición (1, 7 y 15 días). Además se estudió si las arcillas recuperan las propiedades mencionadas después de ser sometidas a altas temperaturas y de ser nuevamente expuestas a la temperatura ambiente durante una semana en el laboratorio. El objetivo general de la investigación es evaluar si la aplicación de temperatura puede utilizarse como mecanismo de estabilización de arcillas o fabricación de llenante mineral. Los resultados
muestran que la plasticidad, el potencial de expansión y la resistencia a la compresión simple de las arcillas ensayadas disminuyen cuando se eleva la temperatura de las muestras entre 150 ºC y 300 ºC y se incrementa el tiempo de exposición. También se encontró que la recuperación de las propiedades de las arcillas es nula cuando se someten a 300 °C durante 15 días.
Abstract: Laboratory tests were performed in order to evaluate the effects on the index properties, volumetric behavior and monotonic uniaxial strength of two clays caused by the application of different temperatures (150, 225 and 300 °C) for varying periods of time (1, 7 and 15 days). Additionally, we studied whether the clays recover the mentioned properties after being subjected to high temperatures and being again exposed to room temperature for one week in the laboratory. The mean objective of this research project is to evaluate whether the application of increasing temperatures in clays can be a good stabilization method in the future or if it is possible to produce mineral filler. Results show that the plasticity, expansion potential and monotonic uniaxial strength decrease when the temperature is raised up 150-300 °C on the samples and when the exposure time increased. Additionally, it is reported that the recovery of clay properties is zero when they are subjected to 300 °C for 15 days.
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