The effect of blending granular aggregates of different origin on the strength of concrete
This work correlates the resistance of concrete cores with the physical properties of the granular material forming it. A basic physical characterization is conducted, taking into account the origin of the grains involved in the concrete mixture; that is, if they come from natural degradation (natur...
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Published in | Physica A Vol. 391; no. 5; pp. 1934 - 1941 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.03.2012
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Subjects | |
Online Access | Get full text |
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Summary: | This work correlates the resistance of concrete cores with the physical properties of the granular material forming it. A basic physical characterization is conducted, taking into account the origin of the grains involved in the concrete mixture; that is, if they come from natural degradation (natural granular aggregates) or from a grinding process (crushed granular aggregates). Apparent and real densities, shape factors, packing densities, and specific surface areas of the grains are measured. The results are discussed as a function of size and origin of the grains. Several mixtures are prepared following a standard protocol and using different ratios of natural and crushed aggregates. For each ratio, six cores are prepared and uniaxial compression tests are performed. A non-monotonic relation between the resistance of concrete and the percentage of crushed aggregate present in it is obtained, with an optimum ratio depending on the physical properties of the grains.
► We present experimental results on granular systems. ► We give a physical characterization of grains used in concrete production. ► We determine the packing density and specific surface area for different mixtures of grains. ► We study the behavior of the strength of concrete cores as a function of the grain mixtures. ► We present a description of the two competing effects intervening in the strength response. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0378-4371 1873-2119 |
DOI: | 10.1016/j.physa.2011.10.034 |