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Taking into account the increasing use of high-strength concrete as a structural material in Colombia, this paper shows the results of research carried out to investigate the effect of different types of coarse aggregate on the static elastic modulus, the compressive strength, the concrete density, and the pulse velocity. To do this, concrete mixes were cast using three different water binder ratios w-c 0.36, 0.32, and 0.28. Ordinary Portland cement and pulverized silica fume SF were used as cementitiuos materials, while four types of coarse aggregates obtained from different sources near Bogota, Colombia were utilized to prepare the concrete samples. Results were analyzed statistically and these showed that the behavior of all the tests followed a normal frequency distribution. Correlations were found among the mixes. From the experimental data obtained in this study, it was concluded that the equations proposed in standard codes overestimated the modulus of elasticity of high-strength concrete, so empirical equations were obtained in order to predict the elastic modulus of elasticity in high-strength concrete.

Tipo de documento: Artículo - Article

Información adicional: Derechos de autor reservados

Palabras clave: modulus of elasticity, high-strength concrete, aggregate





Fuente: http://www.bdigital.unal.edu.co


Introducción



EFFECT OF SEDIMENTARY AND METAMORPHIC AGGREGATE ON STATIC MODULUS OF ELASTICITY OF HIGH-STRENGTH CONCRETE EFECTO DE LOS AGREGADOS SEDIMENTARIOS Y METAMORFICOS EN EL MÓDULO DE ELASTICIDAD ESTATICO DEL CONCRETO DE ALTA RESISTENCIA JUAN LIZARAZO-MARRIAGA Ph.D.
Grupo de Investigación en Estructuras y Materiales GIES (A) Universidad Nacional de Colombia, Bogotá, Colombia, jmlizarazom@unal.edu.co LUCIO GUILLERMO LÓPEZ YÉPEZ, Ms.C.
Grupo de Investigación en Estructuras y Materiales GIES (A), Universidad Nacional de Colombia, Bogotá, Colombia, lglopezy@unal.edu.co Received for review February 17 th, 2011, accepted August 10th, 2011, final version August , 29 th, 2011 ABSTRACT: Taking into account the increasing use of high-strength concrete as a structural material in Colombia, this paper shows the results of research carried out to investigate the effect of different types of coarse aggregate on the static elastic modulus, the compressive strength, the concrete density, and the pulse velocity.
To do this, concrete mixes were cast using three different water binder ratios (w-c) (0.36, 0.32, and 0.28).
Ordinary Portland cement and pulverized silica fume (SF) were used as cementitiuos materials, while four types of coarse aggregates obtained from different sources near Bogota, Colombia were utilized to prepare the concrete samples.
Results were analyzed statistically and these showed that the behavior of all the tests followed a normal frequency distribution.
Correlations were found among the mixes.
From the experimental data obtained in this study, it was concluded that the equations proposed in standard codes overestimated the modulus of elasticity of high-strength concrete, so empirical equations were obtained in order to predict the elastic modulus of elasticity in high-strength concrete. KEYWORD: modulus of elasticity, high-strength concrete, aggregate RESUMEN: Considerando la creciente utilización de hormigón de alta resistencia como material estructural, est...






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