Efecto de la adición puzolánica LC2 en la retracción producida en hormigones fluidos de 35MPa
Fecha
2018-06
Autores
Groero Peña, Reidel Alexandre
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Central “Marta Abreu” de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
Los Materiales Cementicios Suplementarios (MCS) son en la actualidad, junto con los aditivos, las soluciones más sostenibles que se trabajan para lograr hormigones de altas prestaciones y más resistentes a ambientes agresivos. Esta investigación se centra en la introducción de las adiciones puzolánicas en las construcciones hoteleras de Cayo Santa María, en la provincia de Villa Clara, Cuba. Después de algunos estudios se demuestra que la fabricación de hormigón con cementos puzolánicos puede disminuir la aparición de fisuras debido a la retracción, fenómeno muy común en las zonas costeras del país. Por todo esto se decide evaluar la introducción de LC2 (arcilla calcinada, caliza y yeso) como adición puzolánica en hormigones fluidos de 35 MPa. El trabajo se divide en tres etapas fundamentalmente para lograr evaluar la introducción del LC2 como adición al 15% y 30%. En la primera etapa se elabora el diseño teórico-metodológico, en la segunda etapa se lleva a cabo los ensayos para determinar las propiedades del hormigón en estado fresco como consistencia por el Cono de Abrams, en estado endurecido resistencia a los 7 y los 28 días y la retracción mediante el canal y por la ASTM C-157; los resultados de todos estos ensayos se analizan en la tercera etapa. De esta forma, se pone a disposición un estudio sobre el efecto de la adición puzolánica LC2 en las propiedades de hormigones fluidos de 35 MPa y se logra disminuir el consumo de cemento tan perjudicial para el medio ambiente.
Supplementary Cementitious Materials (MCS) is, at the present time, together with the additives, the most sustainable solutions that are worked to achieve concretes of high benefits and more resistant to aggressive atmospheres. This investigation is centered in the introduction of the pozzolanic additions in the constructions of Cayo Santa MarÍa, in Villa Clara, Cuba. After, some studies it is demonstrated that the concrete production with pozzolanic cements can reduce the appearance of fissures due to the retraction, very common phenomenon in the coastal areas of the country. For all this we decide to evaluate the introduction of LC2 (calcine clays, limestone and plaster) like pozzolanic addition in flowing concretes of 35 MPa. The work is divided fundamentally in three stages to be able to evaluate the introduction of LC2 like addition to 15% and 30%. In the first stage the theoreticalmethodological design is elaborated, in the second stage it is carried out the tests to determine the properties of the concrete in fresh state as consistency for the Cone of Abrams, in state compressive strength to the 7 and the 28 days and the retraction with the channel and for ASTM C-157; the results of all these tests are analyzed in the third stage. This way, we start to disposition a study on the effect of the pozzolanic addition LC2 in the properties of flowing concretes of 35 MPa and it is possible to diminish the consumption of so harmful cement for the environment.
Supplementary Cementitious Materials (MCS) is, at the present time, together with the additives, the most sustainable solutions that are worked to achieve concretes of high benefits and more resistant to aggressive atmospheres. This investigation is centered in the introduction of the pozzolanic additions in the constructions of Cayo Santa MarÍa, in Villa Clara, Cuba. After, some studies it is demonstrated that the concrete production with pozzolanic cements can reduce the appearance of fissures due to the retraction, very common phenomenon in the coastal areas of the country. For all this we decide to evaluate the introduction of LC2 (calcine clays, limestone and plaster) like pozzolanic addition in flowing concretes of 35 MPa. The work is divided fundamentally in three stages to be able to evaluate the introduction of LC2 like addition to 15% and 30%. In the first stage the theoreticalmethodological design is elaborated, in the second stage it is carried out the tests to determine the properties of the concrete in fresh state as consistency for the Cone of Abrams, in state compressive strength to the 7 and the 28 days and the retraction with the channel and for ASTM C-157; the results of all these tests are analyzed in the third stage. This way, we start to disposition a study on the effect of the pozzolanic addition LC2 in the properties of flowing concretes of 35 MPa and it is possible to diminish the consumption of so harmful cement for the environment.
Descripción
Palabras clave
Cemento Puzolánico, Aditivos, Hormigones Fluidos, Materiales cementicios suplementarios, Hoteles, Cayo Santa María