Aplicação do ensaio IDEAL-CT para avaliação da resistência à fadiga de misturas asfálticas densas com CAP convencional e modificado por polímero

Abstract

One of the most common types of defects in asphalt pavements is fatigue cracking. With the increase in vehicle volume, several options to improve the performance of asphalt mixtures have emerged and it has become increasingly difficult to make a simplified analysis of the fatigue strength of these mixtures. Within today there is no simple consolidated test for this analysis. Fatigue tests are performed on sophisticated equipment in cut samples. In this scenario Zhou (2019), proposes the Ideal Cracking Test (IDEAL-CT). The essay seeks to fulfill 7 desired requirements in a test like this simplicity, practicality, efficiency, low test equipment cost, repeatability, sensitivity and correlation with field cracking performance. With the emergence of a new option to evaluate the behavior of asphalt mixtures to fatigue, a validation of this option is necessary, for possible implementation in the Brazilian context. This work presents the results of the dosage and fatigue test of asphalt mixtures with conventional asphalt and modified with polymer. From the results an analysis was made, which showed that despite the relatively low repeatability, the use of the test together of the dosage of the mixture adds rationality to the paving project.