CHARACTERISTICS OF TWO CRUSHED COARSE AGGREGATES THAT INFLUENCE THE POROSITY OF CONCRETE
Keywords:
Coarse aggregate, characterization, porosityAbstract
Coarse aggregates have their own characteristics and the behavior of the concrete depends on this, both in terms of its physical-mechanical properties and its performance in the fresh or hardened state. In order to determine the characteristics of the coarse aggregate, this research aims to analyze the influence of the amount of water added to the concrete, according to the established standard; and in turn, how this influences the porosity of the concrete of 210 Kg/cm2. Therefore, to achieve this objective, a quantitative methodology based on an experimental design was used. The coarse aggregate samples that came from two quarries located in different provinces, one in Santo Domingo de los Tsáchilas and the other in Manabí. The tests were carried out in accordance with ASTM C39 on a total of 48 specimens. The method developed by Göran Fagerlund was used to determine the capillary porosity of the concrete. The results showed that the coarse aggregates from both quarries reached values below 10%, within the percentage of effective capillary porosity. Since the size of the coarse aggregate is one of the most important characteristics in the composition of the concrete. It is therefore important that the concrete has a good durability based on the effective capillary porosity.
Keywords: Coarse aggregate, characterization, porosity.
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