Resumen

This project seeks different designs of mixtures that were added with the traditional gradations given by NTC C174, where the requirements for granulometry, gradation and the quality of concrete aggregates are defined. So that, in this way they can be compared with the results obtained in the resistance reached from the cylinders of concrete made with conventional and non-conventional gradations. In this way through the years in civil engineering refers to concrete mixtures specific values have been normalized, for the required characteristics of the structural elements of the buildings, as for example in the case of the gradations of the aggregates for the realization of the concrete the characteristics in the particle size of the fine and coarse aggregates have been normalized, mainly the sands and the economies of the elaboration of the concrete, because the very fine sands are normally uneconomical, whereas sands and gravels are thick It can produce mixtures without workability. With the obtained results were identified that with mixture for gradations 2 y 3, from 19 mm and 50 mm, these results improved in an average of 42% and 49% for 28 days concrete Cylinders. For gradations 1 y 4 the resistances decreased in a 34% and 24.3% In this way, the objective of this paper is determine through the final resistances for the conventional gradations with the objective of reduce costs or to improve the resistances for structural elements.