Diseños de mezcla de hormigón para la construcción de puentes con Cemento de Bajo Carbono. Caso de Estudio: Puente Viaje Infinito
Fecha
2018-06
Autores
Alonso Pérez, Roxana
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
El presente trabajo investigativo tiene como objetivo general diseñar mezclas de hormigón con Cemento de Bajo Carbono (LC3) que cumpla con los parámetros físico - mecánicos y reológicos para la construcción de elementos prefabricados para puentes. Se evaluó el comportamiento de hormigones elaborados con una sustitución del 50% de cemento Portland P-35 por una adición activa a base de arcilla calcinada, caliza y yeso, denominada LC2. Las arcillas empleadas para la fabricación del cemento proceden del yacimiento El Yigre, y el LC3 fue producido a escala semi industrial. El diseño de mezclas se realiza a través del Método de O’ Reilly, con una relación a/c de 0.4 y 1% de aditivo Dynamon SX32 para dosificaciones de LC3 y P-35. Los hormigones producidos son caracterizados tanto en estado fresco como en estado endurecido mediante los ensayos establecidos en la NC 120:2014 Hormigón Hidráulico. Especificaciones. Las mezclas ensayadas son de consistencia fluida según el ensayo de asentamiento por el Cono de Abrams. La temperatura de entrega es superior en la mezcla con P-35, aunque ambas mezclas cumplen con los parámetros establecidos en las normas. En términos de resistencia se observa que para edades tempranas la mezcla con LC3 supera a la mezcla con P-35, no siendo así en edades avanzadas.
The objective of this research work is to design concrete mixtures with Low Carbon Cement (LC3) that meets the physical-mechanical and rheological parameters for the construction of prefabricated elements for bridges. The performance of concretes made with a 50% substitution of Portland cement P-35 was evaluated by an active addition based on calcined clay, limestone and gypsum, called LC2. The clays used to manufacture the cement come from the El Yigre deposit, and the LC3 was produced on a semi-industrial scale. The design of mixtures is carried out through the O 'Reilly Method, with an a / c ratio of 0.4 and 1% of Dynamon SX32 additive for dosages of LC3 and P-35. The concretes produced are characterized both in the fresh state and in the hardened state by means of the tests established in the NC 120: 2014 Hydraulic Concrete. Specifications. The mixtures tested are of fluid consistency according to the settlement test by Abrams Cone. The delivery temperature is higher in the mixture with P-35, although both mixtures comply with the parameters established in the standards. In terms of resistance it is observed that for early ages the mixture with LC3 exceeds the mixture with P-35, not being so in advanced ages
The objective of this research work is to design concrete mixtures with Low Carbon Cement (LC3) that meets the physical-mechanical and rheological parameters for the construction of prefabricated elements for bridges. The performance of concretes made with a 50% substitution of Portland cement P-35 was evaluated by an active addition based on calcined clay, limestone and gypsum, called LC2. The clays used to manufacture the cement come from the El Yigre deposit, and the LC3 was produced on a semi-industrial scale. The design of mixtures is carried out through the O 'Reilly Method, with an a / c ratio of 0.4 and 1% of Dynamon SX32 additive for dosages of LC3 and P-35. The concretes produced are characterized both in the fresh state and in the hardened state by means of the tests established in the NC 120: 2014 Hydraulic Concrete. Specifications. The mixtures tested are of fluid consistency according to the settlement test by Abrams Cone. The delivery temperature is higher in the mixture with P-35, although both mixtures comply with the parameters established in the standards. In terms of resistance it is observed that for early ages the mixture with LC3 exceeds the mixture with P-35, not being so in advanced ages
Descripción
Palabras clave
Hormigón, LC3, Arcillas calcinadas, Asentamiento, Resistencia, Puentes prefabricados, Concrete, LC3, Calcined clays, Settlement, Resistance, Prefabricated bridges.