mix time

Slurry Surfasing was investigated using over-stabilised emulsions and highly reactive stone material with a methylene blue index of 18 at high temperatures. Unmodified emulsions were produced on four different emulsifiers at the same dosage -1.2% by mass of the bitumen emulsion itself. Slurry Surfasing was designed on the basis of the investigated emulsions, screening of the 0-4 mm fraction, water, Portland cement and mix time regulator.

Pavement grade cationic bitumen emulsions formulations were developed for Slurry Surfacing based on orthophosphoric and hydrochloric acids with both all-purpose and specialized emulsifiers used. As a result, there were established relations of mix time upon cement - for Slurry Surfacing based on various acids and emulsifiers. Mix time of Slurry Surfacing mix (having different cement content) with bitumen emulsions on both orthophosphoric and hydrochloric acids is characterized by parabolic relation, branches of the parabola going down.