Efecto de la adición mineral LC2 en las fisuras producidas por cambios de volumen en elementos estructurales
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Pérez Díaz, Ernesto
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Universidad Central “Marta Abreu” de las Villas
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En la actualidad los Materiales Cementicios Suplementarios (MCS) son la vía más efectiva para lograr mayor durabilidad en las estructuras. En Cuba se implementa el uso de dos adiciones como solución alternativa ante esta característica, una es el cemento mezclado PP35 (adición del 15% de tobas zeolíticas) y la otra es Cemento de Bajo Carbono LC3 (adición arcilla calcinada, caliza y yeso LC2). Esta última se comienza a implementar en el 2015 con estudios anteriores en cuanto a las propiedades en pastas, morteros y hormigones. Esta investigación se centra en la introducción de la adición mineral LC2en las construcciones hoteleras de Cayo Santa María, en la provincia de Villa Clara, Cuba, como medida de mitigación en las fisuras que aparecen en los elementos debido a retracción por secado. Por todo esto se decide evaluar la introducción de la adición arcilla calcinada, caliza y yeso en los cambios de volumen en elementos estructurales. El trabajo se divide en tres etapas donde se incluye la adición al 15 y 30%. En la primera se elabora el diseño teóricometodológico, en la segunda se realiza la modelación estructural del elemento, donde se tiene en cuenta las características del material y una tercera etapa en la que se determinan las propiedades del hormigón y el efecto de la adición en los cambios de volumen en los elementos. De esta forma, se pone a disposición un estudio sobre el efecto de la adición mineral LC2 en elementos producidos en la ECOT Cayo Santa María.
At present, the Supplementary Cementitious Materials (SCM) are the most effective way to achieve greater durability in the structures. In Cuba the use of two additions is implemented as an alternative solution to this characteristic, one is the mixed cement PP35 (addition of 15% of zeolitic tuffs) and the other is Low Carbon Cement LC3 (addition of calcined clay, limestone and gypsum LC2). The latter begins to be implemented in 2015 with previous studies regarding properties in pastes, mortars and concretes. This research focuses on the introduction of the LC2 mineral addition in the hotel buildings of Cayo Santa María, in the province of Villa Clara, Cuba, as a mitigation measure in the fissures that appear in the elements due to drying shrinkage. For all this it is decided to evaluate the introduction of the addition calcined clay, limestone and gypsum in the volume changes in structural elements. The work is divided into three stages where the addition to 15 and 30% is included. In the first, the theoretical-methodological design is elaborated, in the second the structural modeling of the element is carried out, where the characteristics of the material are taken into account and a third stage in which the properties of the concrete and the effect of the addition are determined in the volume changes in the elements. In this way, a study is made available on the effect of the LC2 mineral addition on elements produced in the ECOT Cayo Santa María.
At present, the Supplementary Cementitious Materials (SCM) are the most effective way to achieve greater durability in the structures. In Cuba the use of two additions is implemented as an alternative solution to this characteristic, one is the mixed cement PP35 (addition of 15% of zeolitic tuffs) and the other is Low Carbon Cement LC3 (addition of calcined clay, limestone and gypsum LC2). The latter begins to be implemented in 2015 with previous studies regarding properties in pastes, mortars and concretes. This research focuses on the introduction of the LC2 mineral addition in the hotel buildings of Cayo Santa María, in the province of Villa Clara, Cuba, as a mitigation measure in the fissures that appear in the elements due to drying shrinkage. For all this it is decided to evaluate the introduction of the addition calcined clay, limestone and gypsum in the volume changes in structural elements. The work is divided into three stages where the addition to 15 and 30% is included. In the first, the theoretical-methodological design is elaborated, in the second the structural modeling of the element is carried out, where the characteristics of the material are taken into account and a third stage in which the properties of the concrete and the effect of the addition are determined in the volume changes in the elements. In this way, a study is made available on the effect of the LC2 mineral addition on elements produced in the ECOT Cayo Santa María.