Slow Trend for Asphalt with H2O

by John J. Carroll, (M.ASCE), Materials Specialist; Federal Highway Administration, Washington, D.C.,
Donald M. Harriott, Dir. of Communications; The Asphalt Institute, College Park, Md.,

Serial Information: Civil Engineering—ASCE, 1979, Vol. 49, Issue 10, Pg. 76-78

Document Type: Feature article


Cutback asphalt, made fluid by heating and by adding petroleum solvents, is becoming less popular because of the energy crisis and air pollution control standards. Replacing cutbacks are emulsified asphalts which use water instead of energy products as an additive. Emulsified asphalts have little or no hydrocarbon emissions. EPA, FHWA are encouraging a transition from cutbacks to emulsions. FHWA, The Asphalt Institute, and the Asphalt Emulsion Manufacturers Association have cooperatively developed training workshops to overcome the lack of understanding of emulsions.

Subject Headings: Mixtures | HVAC | Petroleum | Solvents | Water use | Hydro power | Chemical additives | Hydrocarbons

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