Influence of type and composition of aggregate on mechanical parameters of concrete

Influence of type and composition of aggregate on mechanical parameters of concrete

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The paper deals with a thorough analysis of the influence of the type of aggregate and its resulting grain size curve on the basic strength parameters of concrete. From the point of view of the type, natural crushed aggregate of amphibolitic type, natural crushed aggregate of granodioritic type and natural mined sedimentary aggregate of the psammitic type were monitored. The same concrete strength class was proposed for the analysis of the impact of individual types of aggregates. In one case it was a concrete mixture with a maximum aggregate grain size Dmax 16 mm with a continuous grain size curve and in the second case a concrete mixture with a maximum grain size Dmax of 22 mm with a discontinuous grain size curve, in the absence of a 4-8 mm fiction. In both cases, the mixture of individual aggregate fractions was determined so that the resulting grain size curve of the mixture was the same for all aggregate types. Thanks to this approach it was possible to directly monitor the influence of the type of aggregate and the grain size curves on the resulting concrete parameters.

The paper deals with a thorough analysis of the influence of the type of aggregate and its resulting grain size curve on the basic strength parameters of concrete. From the point of view of the type, natural crushed aggregate of amphibolitic type, natural crushed aggregate of granodioritic type and natural mined sedimentary aggregate of the psammitic type were monitored. The same concrete strength class was proposed for the analysis of the impact of individual types of aggregates. In one case it was a concrete mixture with a maximum aggregate grain size Dmax 16 mm with a continuous grain size curve and in the second case a concrete mixture with a maximum grain size Dmax of 22 mm with a discontinuous grain size curve, in the absence of a 4-8 mm fiction. In both cases, the mixture of individual aggregate fractions was determined so that the resulting grain size curve of the mixture was the same for all aggregate types. Thanks to this approach it was possible to directly monitor the influence of the type of aggregate and the grain size curves on the resulting concrete parameters.

Aggregates, Concrete aggregates, Concrete mixers, Grain size and shape, Mixtures, Ready mixed concrete

Aggregates, Concrete aggregates, Concrete mixers, Grain size and shape, Mixtures, Ready mixed concrete

ŤAŽKÝ, M.; ŤAŽKÁ, L.; BODNÁROVÁ, L.

2020

31.05.2019

Institute of Physics Publishing

25th International Conference and Meeting of Departments, CONSTRUMAT 2019

1757-8981

IOP Conference Series: Materials Science and Engineering

549

1

Spojené království Velké Británie a Severního Irska

1

6

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