Antistripping asphalt compositions and additives used therein

摘要

An improved anti-stripping additive for asphalt/aggregate composition used in constructing and repairing highways, pavements, driveways and parking lots consists essentially of a citrus terpene (4-isopropyl 1-methylcyclohexene) D-limonene mixed with a vegetable oil such as cottonseed oil, soya oil, rapeseed (canola) oil, peanut oil, corn oil, sunflower oil, palm oil, coconut oil, and palm kernel oil, etc. and a silicone oil dispersant. A preferred composition cosists essentially of 10-15 parts citrus terpene (D-limonene) and 85-90 parts vegetable oil, and an effective amount, up to 2 parts, of silicone oil, for dispersing the vegetable oil and terpene, the parts in the composition totaling 100. When 0.5-1.0 parts of this composition are mixed with 99.0-99.5 parts asphalt and 4-8 parts of the mixture are added to 92-96 parts of aggregate, the resulting asphalt/aggregate may be used as a hot-mix asphalt, hot-mix cold lay asphalt, slurry seal and precoat asphalt for paving. The anti-stripping additive is effective to prevent water damage to asphalt pavements and is biodegradable and ecologically acceptable and substantially reduces odor of asphalt compositions.