ASPHALT MODIFIED WITH AN SBS/MMWCNT NANOCOMPOSITE AND PRODUCTION METHOD THEREOF

摘要

The invention relates to a method for modifying an asphalt binder using, as an additive, a nanocomposite of: functionalized multi-walled carbon nanotubes dispersed in a styrene-butadiene-styrene polymer matrix (SBS/MMWCNT). The asphalt modified with the SBS/MMWCNT nanocomposite has substantially improved mechanical resistance to deformations and to loads at high temperatures, such that the life of the flexible paving is improved. The asphalt mixtures produced with this novel modified asphalt binder have considerably less rutting, are classified as high-modulus asphalt mixtures when produced from asphalt of medium (60/70) or greater hardness, and are not sensitive to moisture effects.

主权项

1. A polymer nanocomposite comprising styrene-butadiene-styrene and multi-walled carbon nanotubes obtained by the process comprising:
a) dispersing a multi-walled carbon nanotubes in a solvent by ultrasound and/or mechanical stirring in order to obtain a multi-walled carbon nanotubes dispersion; b) dissolving a styrene-butadiene-styrene polymer in a solvent by mechanical stirring in order to obtain a styrene-butadiene-styrene solution; c) mixing the multi-walled carbon nanotubes dispersion with the styrene-butadiene-styrene solution by ultrasound and/or mechanical stirring and obtaining a homogeneous viscous solution of styrene-butadiene-styrene polymer and multi-walled carbon nanotubes; d) evaporating the solvent from the homogeneous viscous solution of styrene-butadiene-styrene polymer and multi-walled carbon nanotubes.