DEVELOPMENT OF A RENEWABLE CARBON-BASED BIO-MODIFIER FOR ASPHALT CEMENT

• Main Authors: HUANG BAOSHAN, SHU XIANG, YE XIAOFEI PHILIP, ZHAO SHENG
• Format: Patent
• Language: English
• Published: 14.05.2015
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS THEREOF; CONCRETE; DYES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; LIME, MAGNESIA; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-METALLIC ELEMENTS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; TREATMENT OF NATURAL STONE

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.