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COMPORTAMIENTO MECÁNICO DE SISTEMAS CEMENTANTES BINARIOS (CEMENTO PORTLAND –CENIZA VOLANTE –ESCORIA DE ALTO HORNO)

Authors: Cárdenas Pulido, Jhon; Lizarazo-Marriaga, Juan; Aperador Chaparro, Willian;

COMPORTAMIENTO MECÁNICO DE SISTEMAS CEMENTANTES BINARIOS (CEMENTO PORTLAND –CENIZA VOLANTE –ESCORIA DE ALTO HORNO)

Abstract

En este artículo se presentan los resultados de una investigación encaminada a evaluar el efecto de sistemas cementantes ternarios conformados por adiciones de ceniza volante y escoria de alto horno, sobre las propiedades mecánicas de compresión, módulo de elasticidad y relación de Poisson, tracción y módulo de rotura del concreto. El programa experimental comprendió el ensayo de 120 especímenes de concreto para 8 mezclas con diferentes dosificaciones de cemento Portland, ceniza volante y escoria de alto horno. La caracterización de las mezclas en estado endurecido se realizó mediante análisis de difracción de rayos X (DRX) y microscopía electrónica de barrido (MEB). Los resultados obtenidos indican que los concretos adicionados presentan las mejores propiedades mecánicas para contenidos simultáneos de cenizas volantes y escorias de alto horno equivalentes al 10%, y que las propiedades mecánicas de las mezclas ternarias dependen fundamentalmente del desempeño mecánico de las mezclas binarias. Además, se observó que para las mezclas ternarias, la ceniza volante y la escoria de alto horno no presentan interacción mútua, sino más bien estos materiales coexisten en la matriz y aportan de forma independiente resistencias al concreto, producto de su reacción con el cemento Portland.

In this paper are summarized the results of a research aimed to study the effect of ternary cementitious systems on the mechanical properties of concrete in compression, modulus of elasticity, Poisson's ratio and modulus of rupture. The experimental program included the test of 120 concrete specimens from 8 mixtures having different dosages of Portland cement, fly ash and blast furnace slag. The characterization of the blends in hardened state was performed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The results indicate that blended concretes have the best mechanical properties for same contents of fly ash and blast furnace slag equivalents to 10%. Also, the mechanical properties of ternary blends mainly depend on the mechanical properties of binary blends. Futhermore it was observed that for ternary blends, fly ash and blast furnace slag did not show any interaction between their mechanical properties. It is believed that these materials coexist together in the matrix and provide to the concrete an increase in the strength due to the independent reaction of each with the Portland cement.

Keywords

propiedades mecánicas, Blended concretes, Concretos de activación alcalina, Propiedades mecánicas, mezclas ternarias, Concretos adicionados, concretos de activación alcalina, mechanical properties, Mezclas ternarias, ternary blend mixtures, alkali activated concretes

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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