The invention relates to the field of
asphalt materials, and particularly discloses high-elasticity and high-
viscosity composite modified emulsified
asphalt for cold paving
overlay construction and a preparation method thereof, and the high-elasticity and high-
viscosity composite modified emulsified
asphalt comprises the following raw materials: matrix asphalt, 2-5 parts of an emulsifier, a stabilizer, a
ductility enhancer, a pH
regulator and a modifier; the modifier comprises a mixture of
waste rubber powder, SBR (
Styrene Butadiene Rubber) and
petroleum resin; the preparation method comprises the following steps: heating the matrix asphalt, adding the modifier, heating, and shearing in a
colloid mill to obtain an asphalt mixture; mixing an emulsifier, a stabilizer, a
ductility enhancer, a pH
regulator and water, heating, stirring and mixing to obtain
liquid soap; mixing the asphalt mixture and the
soap liquid, feeding the mixture into a
colloid mill for shearing and emulsifying, and then cooling to obtain the high-
viscosity high-elasticity composite modified emulsified asphalt. The preparation method has the characteristics that the quality of the emulsified asphalt
evaporation residues, especially the dynamic viscosity and the elastic
recovery quality, is improved, and the high-elasticity and high-viscosity modified emulsified asphalt is prepared.