Estudo sobre a ação da modificação dos ligantes asfálticos por montmorilonita organofilizada com genamin nas propriedades reológicas.

Abstract

In most countries, the main technique for coating flexible floorings is the asphalt coating. The introduction of modifiers for asphalt binders and for asphalt mixtures, in order to avoid the appearance of the defects themselves, allow to improve the quality of the asphalt binder and, therefore, to provide the pavement with a longer service life. Thus, this study aims to study the action of modifiers such as organophilic montmorillonite, at 2 and 3%, aging of asphalt binders, CAP 50/70, and rheological properties. After the modification the binder was subjected to shortterm agingRTFO and the following rheological tests were performed: MSCR Multiple Stress Creep Recovery, PG Performance Grade and LAS – Linear Amplitude Sweep. The results indicated that the binders modified by Genamin Organophilized Montmorillonite are less rigid for the respective contents, as well as are less resistant to permanent deformation. The CAP + SBS is the most sensitive and has the highest total resistance to deformation. Both the polymer and the clay are modifiers that allow the binder to be used at high temperatures without loss of performance of the asphalt binder.