Resistencia a la fragmentación de rocas volcánicas como áridos para hormigones y asfaltos

Abstract

In many continental regions and in most of oceanic islands it is necessary the employment of the volcanic rocks in the constructive processes, since they are usually the only ones available in the area, as is the case of the Canary Archipelago. The resistance to the fragmentation of aggregates, obtained from the Los Angeles coefficient (LA coefficient) is one of the most relevant properties that are kept in mind when estimating the quality of them for its employment in the concrete production and asphaltic mixture whose proportions are standardized according to the normative previously established. The quality of the aggregates of volcanic origin, used for concrete production and asphalt mixes, by means of the determination of its resistance to the fragmentation throughout the LA coefficient has been studied. It was possible to check that the obtained value of the LA coefficient for each volcanic lithotype, depends on their texture, phenocrysts content and vesicularity. Likewise, possible correlations between coefficient LA, Uniaxial Compressive Strength (UCS) and the apparent density of the rocks were estimated.