Method for preparing a bitumen emulsion, corresponding bitumen emulsion and use thereof

A process for manufacture of an emulsion of bituminous binder having a viscosity greater than that of a corresponding emulsion, of the same formulation, obtained by mixing an aqueous phase and a bituminous phase under the effect of the same shear energy, said process comprising:

• a) preparing a concentrated primary emulsion containing a surfactant and at least 65% by weight in the case of an anionic emulsion, or at least 70% by weight in the case of the other emulsions, of bituminous binder, by mixing an initial aqueous phase and a liquid bituminous phase under the effect of a mechanical shear energy and in the presence of said surfactant, wherein the mixing is carried out continuously;
• and
• b) adding an aqueous dilution phase to said primary emulsion.