Air Quality and Energy Conservation Benefits from Using Emulsions to Replace Asphalt Cutbacks in Certain Paving Operations

摘要

This paper reviews practices found in the use of liquified asphalts for paving purposes. It examines (1) the solvent content difference in asphalts liquified with petroleum distillates (cutback asphalts) and asphalts liquified using water and an emulsifying agent, and (2) the amounts of hydrocarbons emitted when using cutback asphalts in relation to national and state hydrocarbon emissions. The substitutability of cutbacks and emulsions are discussed. Energy conservation considerations are treated. The results of an eight-state telephone survey of highway paving practices are presented.