Comparación entre Parámetros Marshall de mezclas asfálticas en caliente, obtenidos sobre muestras taladradas y briquetas compactadas en sitio

Abstract

In Ecuador, most of the hot asphalt mixes used in high traffic roads are still designed using the Marshallmethod. The main objective in using this methodology is to determine the optimum percentage of asphalt based on mix parameters such as density, void volumes, stability and flow. [1]. It is for this reason that a correct quality control and assurance process is essential during the mixing, placement and compaction stages of the asphalt mix. Within this context, the present investigation makes an experimental comparison between briquette-typespecimens manufactured on site and core-typespecimens extracted from a wearing course in use inorder to study and determine the degree of correlationof the essential parameters to determine the optimumpercentage of asphalt used both in the laboratory andon site. For this purpose, Spearman's correlation testwas used by statistical methods. Based on the results obtained, it has been concluded that there is a low correlation between these two typesof processes, which is possibly due to the influence ofcoring on the properties of the aggregates and on the asphalt mix due to a loss of asphalt.