Abstract
Loss of adhesion of the asphalt binder to the mineral aggregate causes a weakening or destruction of asphalt pavement. One way to cope with this situation is to treat asphalt mixes with either conventional or new and innovative antistripping materials such as Tall Oil Pitch (TOP). At the present time, TOP, a co-product of the pulp and paper industry, is being used in British Columbia and Finland, mainly as an asphalt extender and recycling agent. In addition to cementitious and rheological characteristics, TOP contains polar carboxylic and hydroxylic groups exhibiting surface active properties. This physiochemical phenomenon was investigated and the test results are presented in this paper. (A)