Estudo de mistura asfáltica tipo SMA (STRONE MATRIX ASPHALT) com uso de fibras de babaçu

Abstract

This study is meant to examine how the addition of from the epicarp fibers ( "outside of the shell") babassu fruit, change in the binder runoff and mechanical properties of the asphalt mixture Stone Matrix Asphalt (SMA) studied (range 25mm AASTHO the MP8-01). In order to develop a mixture that presents greater durability and greater resistance to stresses produced by traffic and weather, on the various problems faced in our country’s pavement structures. SMA mixture shown ideal for roads with high traffic volumes, by presenting in its features a good stability, flexibility, wear resistance, among others. The main purpose of the addition of babassu fibers was to prevent runoff of asphalt binder which has markedly high content values for this type of coating. The analysis of the bleeding was taken by Schellenberg method using uncompressed mixtures thereof with 6% of 50/70 CAP for 5 different fiber contents. These were packed in the manufacture of test specimens for evaluation of Marshall stability and tensile strength by diametrical compression depending on the percentage of fibers, so as for other parameters, such as void volume, volume of mineral aggregate, etc. Increasing the percentage of fiber, gradually decreased run-off of the binder, however to meet the requirements of the standard drip AASHTO MP8-01 a high content of fiber had to be compared to the recommended percentage