Softening agents for recycling asphalt pavement
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United States of America Patent
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Aug 10, 1993
Issued Date -
N/A
app pub date -
Jan 2, 1992
filing date -
Jan 16, 1991
priority date (Note) -
Expired
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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%.
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