Estudio calorimétrico de la hidratación de un cemento portland P35 en presencia de la adición mineral LC2 y un aditivo superplastificante
Fecha
2019
Autores
Martínez Machado, Alejandro
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Universidad Central ``Marta Abreu`` de Las Villas. Facultad de Ingeniería Química y Farmacia. Departamento de Licenciatura en Química
Resumen
La investigación estuvo dedicada al estudio de la influencia de la relación agua/cemento, la adición mineral LC2 y de un aditivo superplastificante en la hidratación de pastas de cementos portland P35 y forma parte de los trabajos que desarrolla el Centro de Investigación y Desarrollo de Estructuras y Materiales (CIDEM) de la Universidad Central “Marta Abreu” de Las Villas (UCLV). En este estudio se utilizó cemento P35 producido en la fábrica “Karl Marx” de la provincia de Cienfuegos, aditivo superplastificante SikaPlast 200 y la adición mineral activa LC2 la cual está compuesta por caliza, arcilla calcinada y yeso, y fue obtenida en una prueba industrial en la fábrica de cementos Sigüaney. Se realizaron ensayos de calorimetría isotérmica utilizando un calorímetro TAM AIR 3238 de la firma Thermometric, obteniéndose las curvas de calor liberado y calor acumulado. Como resultados significativos se obtuvo que las relaciones agua/cemento 0,40 y 0,45 no influyen apreciablemente en la hidratación del cemento portland, se comprobó el efecto retardante del aditivo superplastificante SikaPlast 200 en ausencia de adición mineral LC2 y la aceleración de la hidratación del cemento portland con un 30 % de la adición mineral LC2.
The research was dedicated to the study of the influence of the water/cement ratio, the mineral addition LC2 and a superplasticizer additive in the hydration of a portland cement P35 and is part of the work carried out by the Structures and Materials Research and Development Center (CIDEM, in Spanish) belonging to the Central University "Marta Abreu" of Las Villas (UCLV, in Spanish). Portland cement P35 produced in the Karl Marx factory of the province Cienfuegos was used as a binder, the additive superplasticizer was SikaPlast 200 and the mineral addition was the admixture LC2, which is composed by limestone, calcined clay and gypsum. Isothermal calorimetry tests were carried out using a TAM AIR 3238 calorimeter from the Thermometric firm, calculating the curves of released heat and accumulated heat. The significant results showed that at the water/cement ratios 0,40 and 0,45, does not influence appreciably in the hydration of the portland cement, the additive SikaPlast 200 had a strong retardant effect when there was not mineral addition LC2 and the mineral addition LC2 had an acceler
The research was dedicated to the study of the influence of the water/cement ratio, the mineral addition LC2 and a superplasticizer additive in the hydration of a portland cement P35 and is part of the work carried out by the Structures and Materials Research and Development Center (CIDEM, in Spanish) belonging to the Central University "Marta Abreu" of Las Villas (UCLV, in Spanish). Portland cement P35 produced in the Karl Marx factory of the province Cienfuegos was used as a binder, the additive superplasticizer was SikaPlast 200 and the mineral addition was the admixture LC2, which is composed by limestone, calcined clay and gypsum. Isothermal calorimetry tests were carried out using a TAM AIR 3238 calorimeter from the Thermometric firm, calculating the curves of released heat and accumulated heat. The significant results showed that at the water/cement ratios 0,40 and 0,45, does not influence appreciably in the hydration of the portland cement, the additive SikaPlast 200 had a strong retardant effect when there was not mineral addition LC2 and the mineral addition LC2 had an acceler
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Centro de Investigación y Desarrollo de Estructuras y Materiales (CIDEM), Universidad Central “Marta Abreu” de Las Villas, Cemento Portland, Cemento Portland P35, Hidratación, Calorimetría Isotérmica