Evaluación de la Adición (LC2) de arcilla calcinada-caliza-yeso, en hormigones de 35 MPa destinados a ambientes agresivos
Fecha
2017-06
Autores
Jiménez García, Alejandro
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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-caliza y
yeso, en hormigones de 35 MPa destinados a ambientes agresivos según la NC 120:2014. La
adición se elaboró con arcillas procedentes de los yacimientos el Yigre y Neptuno, las cuales
pasaron por un proceso de calcinación y luego fueron molidas junto al yeso y la caliza en un
molino de bolas. Se elaboraron 5 mezclas de hormigón, la primera con 420 kg/m3 de P-35
como referencia, luego dos mezclas que contenían el LC2 con la arcilla del Yigre pero una
con 17% y otra con 35 % de esta adición y dos mezclas más con el LC2 que contenía la
arcilla de Neptuno pero una con 17% y otra con 35 % de esta adición. A las 5 mezclas se le
realizaron ensayos de asentamiento por el cono de Abrams y resistencia a compresión a las
24 horas y 3, 7 y 28 días, donde se emplearon moldes cilíndricos de 10x20 cm, estos ensayos
se realizaron en el Centro de Investigación y Desarrollo de Estructuras y Materiales (CIDEM)
de la Universidad Central “Marta Abreu” de Las Villas 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, obteniéndose los mejores resultados a los 28 días para la mezcla que
contenía la adición al 35% con la arcilla procedente de Neptuno.
The present diploma thesis evaluates the addition of LC2 from calcined clay, limestone and gypsum on 35 MPa concretes, which will be used in aggressive environments according to NC 120:2014.The addition was made with clay from el Yigre and Neptuno deposits which were calcined and ground with limestone and gypsum in a ball grinder. Five different concretes mixes were made, the first with 420 kg/m3 of P-35 as a reference, then two other concretes, which contained LC2 with clay from El Yigre, one of them contained 17% and the other contained 35% of this addition. Equal concretes were made with the LC2 that contained the clay from Neptuno. The five concretes mixes were submitted to settling tests according to Abrams cone and to compression strength tests after 24 hours and 3, 7 and 28 days, where were used 10 x 20 cm cylindrical molds in the Center of Research and Development of Structures and Materials (CRDSM) at the Central University “Marta Abreu” of Las Villas in Santa Clara following the Cuban norms. The results evidenced that the use of pozzolans, especially calcined poor clay, as part of an addition to concrete, had a positive influence on its properties. The best results were obtained after twenty-eight days in the concrete that contained 35% of the clay from Neptuno.
The present diploma thesis evaluates the addition of LC2 from calcined clay, limestone and gypsum on 35 MPa concretes, which will be used in aggressive environments according to NC 120:2014.The addition was made with clay from el Yigre and Neptuno deposits which were calcined and ground with limestone and gypsum in a ball grinder. Five different concretes mixes were made, the first with 420 kg/m3 of P-35 as a reference, then two other concretes, which contained LC2 with clay from El Yigre, one of them contained 17% and the other contained 35% of this addition. Equal concretes were made with the LC2 that contained the clay from Neptuno. The five concretes mixes were submitted to settling tests according to Abrams cone and to compression strength tests after 24 hours and 3, 7 and 28 days, where were used 10 x 20 cm cylindrical molds in the Center of Research and Development of Structures and Materials (CRDSM) at the Central University “Marta Abreu” of Las Villas in Santa Clara following the Cuban norms. The results evidenced that the use of pozzolans, especially calcined poor clay, as part of an addition to concrete, had a positive influence on its properties. The best results were obtained after twenty-eight days in the concrete that contained 35% of the clay from Neptuno.
Descripción
Palabras clave
Adición, Arcilla Calcinada, Hormigón, Puzolanas