Abstract: A process is described for preparing a water-soluble sulphonated dispersant from a petroleum hydrocracking residue comprising: contacting a petroleum hydrocracking residue boiling above 524.degree. C. with concentrated sulphuric acid, oleum or sulphur trioxide to form a sulphonated mixture containing water soluble and water insoluble products, and separating the water soluble sulphonated product from the mixture. The mixture of water soluble and water insoluble sulphonated products is neutralized with alkali and evaporated to dryness, after which the dried mixture is extracted with alcohol to leave a water soluble product. The product can be used as a water reducer or superplasticizer in concrete.

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%.