Caracterización Básica Y Evaluación De Adherencia De Diferentes Fuentes De Agregados Aluviales

Abstract

The present study aims to evaluate, in a comparative way, the behavior in the laboratory of three asphalt mixtures made of raw materials obtained from crushing processes extracted from different alluvial sources; Guayuriba river located in Villavicencio, Coello river located in Tolima and Gachetà river located in Gachetà. The IDU MD-12 gradation, established as a benchmark granulometric stripe; Was defined based on the importance of the bearing surface within the structure of a pavement and considering that this layer is the most critical, since it is the one that directly receives the humidity, the traffic loads and in general the environmental factors that Directly. We consider that evaluating any other constituent layer of a pavement that is located below the filing folder would not have the same relevance. The study covers the evaluation of compliance with the quality characteristics of the coarse and fine aggregate constituent of each mixture, as well as compliance in terms of adhesion, as stipulated by the IDU-ET-510-11 specification. In the first instance, the combined aggregates without asphalt, the characteristics of cleaning, hardness, durability and geometry were evaluated by applying the tests described in the schedule (table 3 Bitácora). Subsequently the tests were performed on the mixture with asphalt, for which 60-70 asphalt from Barranca was used. The study culminates with the performance of adhesion tests on the MD-12 asphalt mixtures elaborated in the different aggregate combinations.