Fabricación y evaluación del comportamiento de cementos de bajo carbono con clínquer de Siguaney y arcilla calcinada de Pontezuela a nivel semi-industrial
Fecha
2015-07-02
Autores
Martínez Gómez, Yaimii
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Editor
Universidad Central "Marta Abreu" de las Villas
Resumen
La producción de Cemento Pórtland (CP) ha resultado ser uno de los responsables de la degradación del medio ambiente. Muchas han sido las estrategias que se ha trazado la industria cementera para resolver este problema, de ahí que expertos afirmen que la mejor alternativa es sustituir parte del clínquer por materiales cementicios suplementarios. En el presente trabajo se evalúa la finura, la demanda de agua y el contenido de piedra caliza en cementos producidos con una sustitución de 35 y 50% del clínquer, por proporciones de 2:1 y 1:1 de arcilla calcinada-carbonato de calcio. Estos cementos, con diferente composición, fueron comparados con un P-35 producido en las mismas condiciones. La fabricación de los cementos fue mediante el régimen de intermolienda para simular las condiciones de producción industrial. En una primera etapa, de cada cemento se produjeron tres mezclas a escala de laboratorio, variando su finura para analizar su influencia en las propiedades físico-mecánicas. En la segunda fase se seleccionó, de cada cemento, la mezcla que mejor compromiso mostró entre la resistencia a compresión y la demanda de agua, para ser elaborada a escala semi-industrial junto al cemento patrón P-35. Todos fueron caracterizados y aquellos que presentaron 35 y 50% de sustitución con proporción 1:1 y 2:1 brindaron mejores prestaciones, respectivamente. El cemento 50%-2:1 obtuvo mejores resultados, en cuanto a resistencia, al compararlo con el cemento SIG B-45 (Fábrica de cemento Siguaney, 2013).
Portland Cement manufacturing, has emerged as one of those responsible for the degradation of the environment. There have been many strategies that have drawn up the cement industry to solve this problem; some experts say that the best alternative is to replace part of the clinker by supplementary cementitious materials. In this paper it evaluates the fineness, water demand and content limestone cements produced with a substitution of 35 and 50% of clinker, by ratios of 2: 1 and 1: 1 of calcined clay - calcium carbonate. These cements, with different composition were compared with a P-35 produced under the same conditions. The manufacture of cement was by inter grinding regime to simulate the conditions of industrial production. In the first stage, each cement were produced three mixtures on a laboratory scale, varying in fineness to analyze their influence on the physical and mechanical properties. In the second phase, is selected, for each cement, the mixture was best compromise between the compressive strength and demand for water to be drawn to semi-industrial scale with cement pattern P-35. All were characterized and those who had 35 and 50% substitution with 1: 1 and 2: 1 gave better performance, respectively. Cement 50% -2:1 performed better in terms of strength, when compared with cement SIG B-45 (Cement Siguaney, 2013).
Portland Cement manufacturing, has emerged as one of those responsible for the degradation of the environment. There have been many strategies that have drawn up the cement industry to solve this problem; some experts say that the best alternative is to replace part of the clinker by supplementary cementitious materials. In this paper it evaluates the fineness, water demand and content limestone cements produced with a substitution of 35 and 50% of clinker, by ratios of 2: 1 and 1: 1 of calcined clay - calcium carbonate. These cements, with different composition were compared with a P-35 produced under the same conditions. The manufacture of cement was by inter grinding regime to simulate the conditions of industrial production. In the first stage, each cement were produced three mixtures on a laboratory scale, varying in fineness to analyze their influence on the physical and mechanical properties. In the second phase, is selected, for each cement, the mixture was best compromise between the compressive strength and demand for water to be drawn to semi-industrial scale with cement pattern P-35. All were characterized and those who had 35 and 50% substitution with 1: 1 and 2: 1 gave better performance, respectively. Cement 50% -2:1 performed better in terms of strength, when compared with cement SIG B-45 (Cement Siguaney, 2013).
Descripción
Palabras clave
Cemento de Bajo Carbono, Clínquer de Siguaney, Arcilla Calcinada de Pontezuela, Fábrica de Cemento Siguaney, Clay