Actividad puzolánica de arcilla del yacimiento "Neptuno" en Artemisa, para prueba industrial de producción de cemento de bajo carbono
Fecha
2017-06
Autores
Vilches Díaz, Claudia
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Editor
Universidad Central "Marta Abreu" de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
El presente trabajo evalúa la utilización de la arcilla calcinada como material cementicio suplementario, para la producción de cemento de bajo carbono LC3. Esta arcilla fue elegida según las características de su composición química y mineralógica. Para la formulación de dicho cemento, las materias primas fueron sometidas a un proceso de reducción de tamaño de partículas, con una trituradora de mandíbulas y preparadas en un molino de bolas, según la finura normada. La calcinación de la arcilla se realizó a 800°C para analizar la influencia de la temperatura de calcinación. Para la evaluación de la reactividad puzolánica del cemento se utilizó el método de Calorimetría Isotérmica en pastas de cal- puzolanas (Protocolo R3) y de resistencia a la comprensión en morteros normalizados con 30% de sustitución del CPO por arcilla calcinada. El mejor resultado de resistencia mecánica a los 28 días fue del cemento P-35, alcanzando una resistencia de 38MPa aproximadamente, mientras que el cemento objeto de estudio LC3 obtenido, tuvo una resistencia de solo 9MPa. Los resultados obtenidos en la reactividad puzolánica de la arcilla objeto de estudio, calcinada a 800 ºC fueron menores en comparación a los obtenidos a una temperatura de 750 ºC.
The present work evaluates the use of the calcined clay as supplementary cementitious material, for the production of low carbon cement LC3. This clay was chosen according to the characteristics of its chemical and mineralogical composition. For the formulation of this cement, the raw materials were subjected to a process of particle size reduction with a jaw crusher, and prepared in a ball mill, according to the normalized fineness. The calcination of the clay was performed at 800 ° C to analyze the influence of the calcination temperature. For the evaluation of the pozzolanic reactivity of the cement, the Isothermal Calorimetry method was used (Protocol R3) and of resistance to the understanding in standard mortars with 30% substitution of the CPO by calcined clay. The best result of mechanical resistance at 28 days was of the P-35 cement, reaching a resistance of approximately 38 MPa, while the cement object of study LC3 obtained, had a resistance of only 9 MPa. The results obtained in the pozzolanic reactivity of the clay under study, calcined at 800 ºC were lower in comparison to those obtained at a temperature of 750 ºC.
The present work evaluates the use of the calcined clay as supplementary cementitious material, for the production of low carbon cement LC3. This clay was chosen according to the characteristics of its chemical and mineralogical composition. For the formulation of this cement, the raw materials were subjected to a process of particle size reduction with a jaw crusher, and prepared in a ball mill, according to the normalized fineness. The calcination of the clay was performed at 800 ° C to analyze the influence of the calcination temperature. For the evaluation of the pozzolanic reactivity of the cement, the Isothermal Calorimetry method was used (Protocol R3) and of resistance to the understanding in standard mortars with 30% substitution of the CPO by calcined clay. The best result of mechanical resistance at 28 days was of the P-35 cement, reaching a resistance of approximately 38 MPa, while the cement object of study LC3 obtained, had a resistance of only 9 MPa. The results obtained in the pozzolanic reactivity of the clay under study, calcined at 800 ºC were lower in comparison to those obtained at a temperature of 750 ºC.
Descripción
Palabras clave
Arcilla Calcinada, Cemento LC3, Reactividad Puzolánica, Resistencia, Calcined Clay, LC3 Cement, Puzzolanic Reactivity, Resistence