Evaluación de la actividad puzolánica y comportamiento térmico de las arcillas del yacimiento Yaguajay como materia prima para la producción de cemento de bajo carbono
Fecha
2018-06
Autores
Vera Lazcano, Mario Alberto
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Editor
Universidad Central “Marta Abreu” de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
En el presente trabajo se establece a partir de su composición mineralógica, los resultados obtenidos para la evaluación de las arcillas caoliníticas procedentes del yacimiento de Yaguajay como fuente de materia prima para la obtención de materiales cementicios suplementarios, capaces de ser empleados en la formulación de cementos con altos volúmenes de sustitución del clínker. Las materias primas fueron caracterizadas mediante ATG y DRX, en este último se demuestra que el cuarzo y la calcita acompañan a los minerales del grupo de la caolinita en la mezcla compósito. La calcinación de las arcillas se realizó a una temperatura de 800˚C. La evaluación de la reactividad puzolánica fue monitoreada a través del protocolo R3 y resistencia a la compresión en morteros normalizados con un 30% de sustitución de CPO por arcillas calcinadas. El contenido de caolinita y calcita de la muestra ensayada es de 75% y 2% respectivamente. De acuerdo a los resultados de las pruebas de resistencia a la compresión a los 3; 7 y 28 días obtenidos, muestran que los productos calcinados cumplen con los requisitos establecidos para cementos Portland P-35, según la NC 95:2011 y exceden los valores de la serie de referencia
In the present work is established from its mineralogical composition, the results obtained for the evaluation of the kaolinitic clays from the Yaguajay deposit as source of raw material for obtaining supplementary cementitious materials, capable of being used in the formulation of cements with high volumes of clinker replacement. The raw materials were characterized by ATG and XRD, in the latter it is shown that quartz and calcite accompany the minerals of the kaolinite group in the composite mixture. The calcination of the clays was carried out at a temperature of 800 ˚C. The evaluation of the pozzolanic reactivity was monitored through the R3 protocol and resistance to compression in standardized mortars with 30% substitution of the CPO by calcined clays. The content of kaolinite and calcite of the sample tested is 75% and 2% respectively. According to the results of the compression resistance tests at 3; 7 and 28 days obtained, show that the calcined products meet the requirements established for Portland P-35 cements, according to NC 95: 2011 and exceed the values of the reference series
In the present work is established from its mineralogical composition, the results obtained for the evaluation of the kaolinitic clays from the Yaguajay deposit as source of raw material for obtaining supplementary cementitious materials, capable of being used in the formulation of cements with high volumes of clinker replacement. The raw materials were characterized by ATG and XRD, in the latter it is shown that quartz and calcite accompany the minerals of the kaolinite group in the composite mixture. The calcination of the clays was carried out at a temperature of 800 ˚C. The evaluation of the pozzolanic reactivity was monitored through the R3 protocol and resistance to compression in standardized mortars with 30% substitution of the CPO by calcined clays. The content of kaolinite and calcite of the sample tested is 75% and 2% respectively. According to the results of the compression resistance tests at 3; 7 and 28 days obtained, show that the calcined products meet the requirements established for Portland P-35 cements, according to NC 95: 2011 and exceed the values of the reference series
Descripción
Palabras clave
Clínker, Calcinación, Mezcla compósito, Reactividad puzolánica, Arcillas caoliníticas, Material cementicio suplementario, Clinker, Calcination, Composite mixture, Pozzolanic reactivity, kaolinitic clays, supplementary cementitiou material