Avaliação mecânica de misturas asfálticas utilizando corpos de prova extraídos e moldados.

Abstract

Mechanical characterization of asphalt mixtures intends to obtain properties to comprehend the material behavior and help simulating the layered system. However, there is not yet a consensus of the effects on properties when samples are molded on the test dimension or cored and subsequently sawed. This paper’s objective is to evaluate the effects on some mechanical properties of asphalt mixtures using laboratory test specimens of specific dimensions or cored from larger specimens. The methodology consists on performing Tension Strength (TS), Resilient Modulus (RM), Uniaxial Repetitive Loading Test, Dynamic Modulus (|E*|) and Stress Sweep Rutting (SSR) for molded samples and also cored and sawed ones. The air voids content (AV) were also verified during the extraction steps. For permanent deformation, one of the mixtures’ results indicates resistance reduction after coring. On the other tests performed, converging results were verified for both methodologies.