Evaluación de la incidencia del tamaño máximo nominal del agregado grueso en los resultados de los ensayos de resistencia a compresión del concreto empleando cilindros de diferentes dimensiones
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Peralta García, Martin Agustín | 2019
The compressive strength of concrete is the most common measure currently used to measure the
quality and performance of concrete on construction sites. This property of this material used in
the construction is measured by breaking concrete samples made in the fresh state and tested in
their hardened state by applying an axial load in a compression testing machine. In particular, for
cylindrical samples, the regulations indicate that the diameter of a sample of cylindrical shape or
the minimum dimension of a rectangular cross-section must be at least 3 times greater than the
nominal maximum size (TMN) of the coarse aggregate of the concrete mixture. The purpose of
this research project is to carry out a comparative analysis of the resistance to compression of
concrete samples tested in cylinder sizes of 100x200 mm and 150x300 mm. For which, a sample
is made in two mixtures of different resistances, varying in each case the TMN of coarse
aggregate in ¾ "and 1". These cylinders are molded, cured and tested following the standard
procedures required by the regulations. The results obtained will be analyzed with reference to
the available technical information of investigations carried out on the subject, which indicates
that the compression resistance expected in the samples taken in cylinders of 100 mm is superior
to the resistance of the cylinders of 150 mm; likewise, that the TMN of the aggregate is a
relevant incidence factor in the expected results. The correlations and statistical analysis of the
resistance in cylinders of diameter 100 mm against those of 150 mm (R100 / R150) for different
designs of mixtures will allow confirming the tendencies of incidence of the diameter of the
cylinder, the characteristics of the aggregates and the resistance of the concrete.
LEER
