Influência da granulometria nas características mecânicas de misturas asfálticas para aeródromos.

Abstract

Whit the need to achieve longer distances in shorter periods, the modal of air transport has shown a significant growth in recent decades, besides increasing the weight of the aircraft .Due to low investment in country's airway infrastructure, the rules for design of pavements of airports have received few changes, especially with regard to asphalt mixtures for covering. Up against this scenario, end knowing is the role of particle size distribution in bituminous mixtures, as the size of a mixture can cause increased risk of premature onset of pathologies in the covering, it was proposed in this study to analyze the influence of the size of households in the physical and mechanical behavior of asphalt mixtures, ranging in range 2 of Aerononautics. Besides the physical characteristics of the mixtures studied and the other parameters of Marshall test, the research was focused on the variation of tensile strength, RT, and the type of resilience, MR, within the range considered. To achieve the objectives, size three mixtures were used, two that fit near the upper and lower limits of that range, and a forthcoming line of maximum density range of 2. The strengths of the mixture were performed according to the Marshall methodology. It has been made the tests of tensile diametral compression, resistance to damage induced by moisture and test module Resilience in levels of project binder for each mixture. A determined from the results obtained, it was found that the three mixtures are showed satisfactory on the characteristics and volume of Marshall Stability, given the parameters set by the standard of the Aeronautics. However, based on a joint analysis of mechanical properties (MR and RT) of mixtures whose sizes are approaching the upper limit of the band 2 of the Aeronautic, it was concluded that tend to become unsuitable for use as a covering of airfields.