Development of a renewable carbon-based bio-modifier for asphalt cement

摘要

A bio-modifier for asphalt is provided that comprises non-wood bio-char. In some embodiments, the bio-char comprises pyrolyzed biomass from a bio-fuel crop and/or comprises pyrolyzed grass. The asphalt modifier can improve the performance of asphalt compositions such as asphalt binder compositions and compositions comprising asphalt binder and aggregate. For example, the bio-modifier can improve the temperature susceptibility of asphalt binder compositions and increase the rutting resistance, moisture and cracking resistance of hot mix asphalt compositions. In addition, methods of preparing the bio-modifier composition, methods of preparing modified asphalts comprising the bio-modifier, and modified asphalt compositions are provided.

主权项

1. A method for preparing a solid bio-modifier composition for asphalt, the method comprising: providing a non-wood bio-mass material; and treating the non-wood bio-mass material under conditions suitable to produce a solid bio-modifier composition comprising bio-char, wherein the bio-char has an average particle size of about 150 microns or less.