Adhesion of asphalt to aggregates

A bituminous paving composition consisting essentially of:

• aggregate;
• an asphalt selected from the group consisting of bitumen, asphalt and crude residuum containing asphaltenes;
• and an effective amount, from about 0.1% to about 8% by weight, of a nitrogen-containing, adhesion-improving anti-stripping agent comprising sewage sludge-derived oil, or a fraction thereof, said sewage sludge-derived oil comprising a mixture of saturated aliphatic hydrocarbons, monoaromatic hydrocarbons, diaromatic hydrocarbons, polyaromatic hydrocarbons, polar compounds and basic, pyridine-soluble compounds, having the following elemental 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% by weight;
• and carbon, about 76.9% to about 79.8% by weight.

An asphaltic composition consisting essentially of:

• an asphaltic cement;
• and an effective amount, from about 0.1% to about 8% by weight, of a nitrogen-containing, adhesion-improving, anti-stripping agent comprising sewage sludge-derived oil, or a fraction thereof, said sewage sludge-derived oil comprising a mixture of saturated aliphatic hydrocarbons, monoaromatic hydrocarbons, diaromatic hydrocarbons, polyaromatic hydrocarbons, polar compounds and basic, pyridine-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% by weight, and carbon, about 76.9% to about 79.8% by weight.

An asphaltic composition consisting essentially of:

• comminuted aged asphaltic pavement material;
• an effective amount, from about 2% to about 15% by weight of a blend of an agent selected from the group consisting of a soft asphalt cement, a conventional asphalt cement, and a cutback asphalt, with a nitrogen-containing, adhesion-improving agent comprising a sewage sludge-derived oil, or a fraction thereof, 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%.

An asphaltic composition consisting essentially of:

• comminuted aged asphaltic pavement material;
• an effective amount, from about 2% to about 15% by weight of a blend of an agent selected from the group consisting of a soft asphalt cement, a conventional asphalt cement, and a cutback asphalt, with a nitrogen-containing, adhesion-improving agent comprising a sewage sludge-derived oil, or a fraction thereof, 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 3.42% to 4.95% by weight;
• oxygen, 5.84% to 6.89% by weight;
• sulfur, 0.34% to 0.83% by weight;
• hydrogen, 9.70% to 10.44%, and carbon, about 76.92% to 79.76%.