Unmet Need: Improved quality of asphalt binders
Nano-modification of asphalt binder has exhibited outstanding potential in meeting the needs of pavement industry, but emerging carbon-based nanomaterials have yet to be studied in depth for their possible impacts on asphalt binder, mortar, or concrete. Asphalt compositions are complicated by the presence of diverse organic molecules which can react with various types of modifiers. In the past decade, using nanomaterials, such as nanoclays, Nano-zinc oxide, Nano-titanium dioxide and nanosilica, to modify asphalt binder has been of extensive interest.
The Technology: Blending GO in small trace amounts to asphalt binders
Compared with other nanomaterials, graphene oxide (GO) has a unique quasi two-dimensional layered structure with the layer spacing of 0.7-1.2 mm and can be easily dispersed in the aqueous solution or organic solvent to form homogeneous monolayer GO. WSU inventors blended different dosages of GO with an unmodified asphalt binder and a SBS modified asphalt binder. The mechanical performance, modification mechanism and thermal property of GO modified asphalt binders were investigated. It was demonstrated that the addition of trace amounts of GO (no more than 0.2 wt. %) dramatically enhanced the low temperature (120°C) viscosity, high temperature elasticity and permanent deformation resistance of unmodified/ SBS modified binders.
• Pavements/road to handle increased traffic volume, loads and tire pressures.
• Producing roofing felts suitable for low temperatures too.
• To line body parts of cars and trucks to muffle road noise.
• Waterproofing agent for flat roofs and underground tank storage.
• Improvements in creep behavior, rutting resistance.
• Increased workability providing longer service life.
• Improved resistance to low-temperature cracking.
• Cost-reduction for production
US patent application filed.