Resilient Module Soil-Cement Prediction based on Setting Temperature

• Autores: Liliana Carolina Hernández García, Nelson Fernando Lizarazo Salamanca
• Localización: Ingeniería e Investigación, ISSN-e 2248-8723, ISSN 0120-5609, Vol. 40, Nº. 2, 2020
• Idioma: inglés
• Títulos paralelos:
  • Predicción del Módulo Resiliente del Suelo Cemento en función de la Temperatura de Fraguado
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• Resumen
  • español

    Esta investigación correlaciona la temperatura de fraguado del Suelo Cemento (SC) con su módulo resiliente, a partír del índice de madurez de tres mezclas fabricadas con diferentes tipos de cementos: uso general, Altas Resistencias Tempranas y Moderado calor de Hidratación. Cada diseño de mezcla cuenta con una resistencia a la compresión de 4,5 MPa a los 7 días de edad y una durabilidad medida con la prueba de humedecimiento y secado del 10 %. El método consistió en curar las muestras de los tres diseños de mezcla en tres temperaturas diferentes -11, 30 y 40 ◦C- para luego monitorear el desarrollo de la temperatura al interior de las muestras durante las primeras treinta horas. A los 28 días de edad, se midió el módulo resiliente de las muestras con equipo triaxial cíclico. Tras analizar los resultados, se dedujo una ecuación lineal que facilitaría un control de calidad durante el proceso constructivo. Esto evita la micro fisuración de las capas compactadas, ya que no es necesario fracturarlas durante la extracción de núcleos y las pruebas de densidad en campo.

  • English

    This research correlates the setting temperature of the Soil Cement (SC) with its resilient modulus, based on the maturity index of three mixtures made with different types of cements: general use, High Early Resistance, and Moderate Heat of Hydration. Each mix design has a compressive strength of 4,5 MPa at 7 days of age and durability measured with the 10% wetting and drying test. The method consisted of curing the samples of the three mix designs at three different temperatures -11, 30, and 40 ◦C- and then monitoring the development of the temperature within the samples during the first thirty hours. At 28 days of age, the resistance modulus of the samples was measured with cyclic triaxial equipment. After analyzing the results, a linear equation was deduced which would facilitate quality control during the construction process. This prevents microcracking of the compacted layers, since their fracturing is not neccessary during the extraction of nuclei and field density tests.

    This research correlates the setting temperature of the Soil Cement (SC) with its resilient modulus, based on the maturity index ofthree mixtures made with different types of cements: general use, High Early Resistance, and Moderate Heat of Hydration. Eachmix design has a compressive strength of 4,5 MPa at 7 days of age and durability measured with the 10% wetting and drying test.The method consisted of curing the samples of the three mix designs at three different temperatures 11,30, and 40 Candthenmonitoring the development of the temperature within the samples during the first thirty hours. At 28 days of age, the resistancemodulus of the samples was measured with cyclic triaxial equipment. After analyzing the results, a linear equation was deducedwhich would facilitate quality control during the construction process. This prevents microcracking of the compacted layers, sincetheir fracturing is not neccessary during the extraction of nuclei and field density tests.