Physical mechanical performance of asphaltic emulsions in road oil for flexible pavements

Abstract

The present study evaluated experimentally, the impact of the application rate, in terms physical and adherence, of four types of emulsions used as road oiling in two asphaltic layers for flexible pavements. Asphaltic layers are composed by an asphaltic base and a hot mix asphalt surface layer. To evaluate the adherence and physical properties, a shearing test was carried out. Four rapid set cationic emulsions were used, by means of three application rates of 0.33 l/m2, 0.50 l/m2, and 0.65 l/m2 (recommended values in Colombian road construction practices). The results demonstrate that an emulsion application rate of 0.50 l/m2 guarantees better adherence in the structural package. Also, that greater resistance against the sliding of the surfaces of the specimens in the shearing test, depends on the residual content of the asphaltic emulsion.