Diseño y producción de hormigón con cemento de bajo carbono producido en prueba semi-industrial
Fecha
2015-07-02
Autores
Rodríguez Paradelo, Yasel
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Editor
Universidad Central "Marta Abreu" de las Villas
Resumen
En los últimos años se han venido desarrollando nuevos tipos de cementos como es el caso del cemento de bajo carbono (CBC), el cual es más económico que un cemento Portland y permite reducir las emisiones de CO2 a la atmósfera al sustituir parte del clínquer, uno de los componentes más costosos y principal emisor del gas contaminante durante su proceso de obtención.
Con el objetivo de conocer el comportamiento físico-mecánico de las nuevas formulaciones de cementos en el hormigón hidráulico, en el presente trabajo se llevó a cabo el diseño de mezclas de hormigón aplicando el método Toufar, con el empleo de cuatro variantes de CBC con sustituciones de 35 y 50 % del clínquer y relación arcilla calcinada-caliza 1:1 y 2:1 y un cemento Portland P 35 como patrón, todos los cemento fueron obtenidos a escala semi-industrial. Se usaron áridos procedentes de las canteras El Purio en Villa Clara y La Victoria en La Habana.
Los hormigones elaborados fueron sometidos en estado fresco al chequeo del asentamiento utilizando el cono de Abrams obteniéndose como resultado un asentamiento bajo, entre 2 y 4 cm. En estado endurecido se sometieron los especímenes elaborados al ensayo de resistencia a la compresión, obteniéndose resultados iguales o superiores a las mezclas elaboradas con cemento Portland P 35, lo cual demuestra el buen comportamiento de los CBC en las mezclas de hormigón hidráulico. Se demostró que el uso incorrecto de granulometría de áridos en el método Toufar influye en la resistencia a la compresión.
In the last years, new types of cements have been developed, such as low carbon cement (LCC) , which is more economic than Portland cement and allows reduce the CO2 emissions to the atmosphere when substituting part of the clinker, one of the most expensive and main transmitter of the pollutant gas during the extraction process. Aimed at knowing the physical-mechanical behavior of the new formulations of cements in hydraulic concrete, the design of mortar concrete using the Toufar method was carried out in this work, using four types of LCC with substitutions of 35 and 50 % of clinker and the relation calcined clay-limestone 1:1 and 2:1 and a Portland cement P 35 as standard, all cements were obtained in semi-industrial scale. The aggregate used came from squares in El Purio in Villa Clara and La Victoria in La Habana. The created concrete was submitted in fresh state to the checking of slump using a cone of Abrams obtaining as result a low slump, between 2 and 4 cm. In hard state, the created sample was submitted to the test of compressive strength, obtaining the same or better results of the created mortars with Portland cement P 35, which shows the well behavior of the LCC in the mortars of hydraulic concrete. It was showed that the wrong use of aggregate grading in the Toufar method has influence in the compressive strength.
In the last years, new types of cements have been developed, such as low carbon cement (LCC) , which is more economic than Portland cement and allows reduce the CO2 emissions to the atmosphere when substituting part of the clinker, one of the most expensive and main transmitter of the pollutant gas during the extraction process. Aimed at knowing the physical-mechanical behavior of the new formulations of cements in hydraulic concrete, the design of mortar concrete using the Toufar method was carried out in this work, using four types of LCC with substitutions of 35 and 50 % of clinker and the relation calcined clay-limestone 1:1 and 2:1 and a Portland cement P 35 as standard, all cements were obtained in semi-industrial scale. The aggregate used came from squares in El Purio in Villa Clara and La Victoria in La Habana. The created concrete was submitted in fresh state to the checking of slump using a cone of Abrams obtaining as result a low slump, between 2 and 4 cm. In hard state, the created sample was submitted to the test of compressive strength, obtaining the same or better results of the created mortars with Portland cement P 35, which shows the well behavior of the LCC in the mortars of hydraulic concrete. It was showed that the wrong use of aggregate grading in the Toufar method has influence in the compressive strength.
Descripción
Palabras clave
Cemento de Bajo Carbono, Diseño de Mezclas de Hormigón, Método Toufar, Cantera La Victoria en La Habana, Cantera El Purio en Villa Clara, Desig