ESTIMANDO LA RESISTENCIA DEL HORMIGÓN USANDO LA CORRELACIÓN CON EL MÉTODO DE LA MADUREZ DEL HORMIGÓN APLICADO A LOS MATERIALES DE COCHABAMBA-BOLIVIA
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Abstract
Para estimar la resistencia del hormigón, el método de rotura de cilindros es el más usado; sin embargo, este método, aunque ampliamente aceptado, no produce resultados inmediatos y debido a la gran cantidad de variables que existen, puede o no ser una representación precisa de la resistencia del hormigón. Este artículo busca aplicar el método de madurez en la determinación de la resistencia a compresión del hormigón y producir un modelo analítico para comprobar la madurez del hormigón en Bolivia. Se encuentra la relación entre la temperatura interna del hormigón y el tiempo de curado para determinar la resistencia del hormigón in situ. Los resultados serán validados y comparados con resultados de ensayos de cilindros de hormigón de la misma mezcla y características. El método fue probado en el séptimo piso del edificio residencial "Terrazas de Aranjuez". Todas las pruebas necesarias antes de la aplicación se realizaron en los laboratorios READY MIX Cochabamba. Se dosificó y ensayó para una resistencia especificada de hormigón de 21 MPa. El método de madurez permite conocer el momento exacto en que el hormigón alcanza su resistencia requerida. La resistencia requerida del hormigón se alcanzó 11 días después del vaciado del hormigón. Esto significa que se podría realizar el desencofrado completo entre 11 y 14 días después del vaciado considerando que han existido pequeñas diferencias en las lecturas de los sensores posicionados en la losa. Este método no solo reduce el tiempo y costos de construcción, sino que también permite un conocimiento preciso e inmediato de la resistencia del hormigón.
In order to estimate concrete strength, concrete cylinders are commonly used; however, this method, although widely accepted, does not produce immediate results and due to the vast amounts of variables that exist, may or may not be an accurate depiction of the real, in place concrete strength. This article seeks to apply the maturity method to the Bolivian environment of construction and aims to produce an analytical model for concrete maturity in Bolivia by finding the relationship between the concrete's internal temperature and the curing time in order to determine the exact resistance and strength of the concrete at hand. The results will then be validated by and compared to concrete cylinders of the same mix and characteristics. The method was tested on the seventh floor of the residential building "Terrazas de Aranjuez". All the tests that were necessary prior to the application were conducted at READY MIX laboratories Cochabamba. A specific mix of 21 MPa strength concrete was prepared and then tested. The maturity method allows the exact moment the concrete reaches its required resistance to be known. The required concrete resistance was reached 11 days after the pouring of the concrete. This implied that a complete removal of framework could be done between 11-14 days after the pour considering that minor differences exist between the readings of each sensor positioned in the slab. This method not only reduces construction time and costs but also allows a precise and immediate knowledge of the concrete resistance.
In order to estimate concrete strength, concrete cylinders are commonly used; however, this method, although widely accepted, does not produce immediate results and due to the vast amounts of variables that exist, may or may not be an accurate depiction of the real, in place concrete strength. This article seeks to apply the maturity method to the Bolivian environment of construction and aims to produce an analytical model for concrete maturity in Bolivia by finding the relationship between the concrete's internal temperature and the curing time in order to determine the exact resistance and strength of the concrete at hand. The results will then be validated by and compared to concrete cylinders of the same mix and characteristics. The method was tested on the seventh floor of the residential building "Terrazas de Aranjuez". All the tests that were necessary prior to the application were conducted at READY MIX laboratories Cochabamba. A specific mix of 21 MPa strength concrete was prepared and then tested. The maturity method allows the exact moment the concrete reaches its required resistance to be known. The required concrete resistance was reached 11 days after the pouring of the concrete. This implied that a complete removal of framework could be done between 11-14 days after the pour considering that minor differences exist between the readings of each sensor positioned in the slab. This method not only reduces construction time and costs but also allows a precise and immediate knowledge of the concrete resistance.
Description
Vol. 18, No. 1