Bitumen spreading on calcareous aggregates at high temperature

摘要: In hot asphalt applications, the adhesion between bitumen and mineral aggregate is usually described in terms of surface tension contact angle over aggregate. However, quantification physico-chemical bond under realistic conditions a nontrivial task. this work, we designed high-temperature goniometer to measure liquid on substrates. The drop deposition was conducted once thermal equilibrium attained. We monitored spreading sessile drops viscous naphthenic asphaltic polished sheets calcareous aggregates at high temperature (70–100 °C). A near complete wetting with very low angles (13–\(24^{\circ }\)) reproduced regardless origin temperature. Furthermore, coating degree bitumens apparently similar. found that bitumen-aggregate adequately by dynamic rather than wettability. Spreading kinetics ruled particular properties each such as viscosity acid index. evidences etching during