Softening agents for recycling asphalt pavement

Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue

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10628406, C08L 9500

Patent

active

052344940

ABSTRACT:
A novel asphaltic composition is provided herein. The composition consists of comminuted aged asphaltic pavement material and an effective amount, from about 2% to about 15% by weight of a blend of a soft asphalt cement, a conventional asphalt cement, or a cutback asphalt, with a nitrogen-containing, adhesion-improving, anti-stripping agent comprising a sewage sludge-derived oil, or a fraction thereof, the sewage sludge-derived oil comprising a mixture of saturated aliphatic hydrocarbons, monoaromatic hydrocarbons, diaromatic hydrocarbons, polyaromatic hydrocarbons, polar compounds and basic, pyridene-soluble compounds, having the following elemental chemical composition: nitrogen, about 3.4% to about 5% by weight; oxygen, about 5.8% to about 6.9% by weight; sulfur, about 0.3% to about 0.8% by weight; hydrogen, about 9.7% to about 10.4%, and carbon, about 76.9% to about 79.8%.

REFERENCES:
patent: 3028249 (1962-04-01), Hoiberg
patent: 4000000 (1976-12-01), Mendenhall
patent: 4177079 (1979-12-01), Espenschield
patent: 4298379 (1981-11-01), Burris
patent: 4298397 (1981-11-01), Burris
patent: 4325738 (1982-04-01), Plancher et al.
patent: 4904305 (1990-02-01), Zanzotto et al.

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