Evaluación de la adición de arcilla calcinada + caliza (LC2) en la producción de hormigón de 35 MPa para zonas costeras agresivas.
Fecha
2018-06
Autores
Rodríguez González, Yariel
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
En el presente trabajo de diploma se evalúa la adición de LC2 de arcilla calcinada-calizayeso, en hormigones de 35 MPa destinados a ambientes agresivos según la NC 120:2014. La adición se elaboró con arcilla procedente del yacimiento El Yigre, la cual pasó por un proceso de calcinación y luego fue molida junto a la caliza y el yeso en un molino de bolas. Se elaboraron 4 mezclas de hormigón, la primera con 450 kg/m3 de P35 como referencia, luego tres mezclas que contenían el LC2 con la arcilla de El Yigre pero una con 15 %, otra con 30 %, y la otra con 45 % de esta adición. A las 4 mezclas se le realizaron ensayos de reología (asentamiento), de resistencia a compresión a las 24 horas y 3, 7 y 28 días, donde se emplearon moldes cilíndricos de 15x30 cm, estos ensayos se realizaron en el laboratorio la Planta de Hormigón del Cayo Santa María según las normas cubanas.
Los resultados mostraron que el uso de puzolanas, específicamente las arcillas pobres calcinadas como parte de una adición en hormigones influyen positivamente en las propiedades de este. La mezcla de sustitución al 30% de LC2, aunque es solo ligeramente superior en resistencia, fue la mezcla ideal; caracterizada por su homogeneidad y adecuado volumen en finos
In the present work of diploma, the addition of LC2 of calcined clay-limestone-gypsum is evaluated in concrete of 35 MPa destined to aggressive environments according to NC 120: 2014. The addition was made with clay from the El Yigre deposit, which went through a calcination process and was then ground together with the limestone and gypsum in a ball mill. Four concrete mixtures were prepared, the first with 450 kg / m3 of P-35 as reference, then three mixtures containing the LC2 with the El Yigre clay but one with 15%, another with 30%, and the other with 45 % of this addition. The 4 mixtures were tested rheology (settlement), compression resistance at 24 hours and 3, 7 and 28 days, where cylindrical molds of 15x30 cm were used, these tests were made in the laboratory the Concrete Plant of Cayo Santa María according to Cuban standards. The results showed that the use of pozzolans, specifically poor calcined clays as part of an addition in concretes positively influence the properties of this. The 30% substitution mixture of LC2, although it is only slightly higher in strength, was the ideal mix; characterized by its homogeneity and adequate volume in fines
In the present work of diploma, the addition of LC2 of calcined clay-limestone-gypsum is evaluated in concrete of 35 MPa destined to aggressive environments according to NC 120: 2014. The addition was made with clay from the El Yigre deposit, which went through a calcination process and was then ground together with the limestone and gypsum in a ball mill. Four concrete mixtures were prepared, the first with 450 kg / m3 of P-35 as reference, then three mixtures containing the LC2 with the El Yigre clay but one with 15%, another with 30%, and the other with 45 % of this addition. The 4 mixtures were tested rheology (settlement), compression resistance at 24 hours and 3, 7 and 28 days, where cylindrical molds of 15x30 cm were used, these tests were made in the laboratory the Concrete Plant of Cayo Santa María according to Cuban standards. The results showed that the use of pozzolans, specifically poor calcined clays as part of an addition in concretes positively influence the properties of this. The 30% substitution mixture of LC2, although it is only slightly higher in strength, was the ideal mix; characterized by its homogeneity and adequate volume in fines
Descripción
Palabras clave
Adición, Arcilla calcinada, Caliza, Hormigón, Puzolanas, Addition, Calcined clay, Limestone, Concrete, Pozzolans