STUDY OF THE USE OF ASPHALT CONCRETE RECYCLING AS PAVEMENT LAYER

Abstract

The present study aims to analyze the performance of milling material mixed with binders and mineral additions for tensile strength by diametrical compression, with the purpose of evaluating its application in the base layers and sub-base of pavements and in the search for satisfactory solutions in terms of pavement. The materials used were the milled material of asphalt pavement and stone powder, with the CP-IV pozzolanic Portland cement and the dolomite hydrated lime CH-II, with mineral additions of rice husk and fly ash. Cylindrical specimens measuring 10cm in diameter and 5cm in height were molded with modified energy from the Proctor test and tensile strength tests were carried out by diametrical compression, and the additions were performed at different levels. The results indicated that the quantitative of the mixture that obtained the highest tensile strength by diametrical compression was composed of 80% of milled material and 20% of stone powder, containing 5% cement and 5% silica content of the rice husk. This mixture obtained tensile strength by diametrical compression of more than 1.15 MPa. Therefore, this mixture comes to be the one of better technical and environmental performance, reusing residues of the pavement itself and also of rice production.