Preparation and Properties of Polymer High Viscosity Modified Emulsified Asphalt
Polymer modified emulsified asphalt A(Dynamic viscosity＜20 000 Pa·s)and high viscosity polymer modified emulsified asphalt(Dynamic viscosity＞20 000 Pa·s)were prepared by different mass proportions of poly-mer resins.The needle penetration,ductility,softening point and dynamic viscosity of the evaporated residue were analyzed by experiments.The interlayer shear and direct pullout tests were conducted by the homemade modified emulsified asphalt B and matrix emulsified asphalt to evaluate the adhesion properties and shear strength of the highly viscous modified emulsified asphalt.The results show that the physical qualities of the polymer high viscosity emulsifiied asphalt modified were superior to the ones of the polymer emulsified asphalt modified;The 3 indexes of softening point,penetration and ductility of the above 3 types of emulsified asphalt were lower than the ones of prior emulsification,which all decreased in various degrees.From the aspects of shear and adhesion,polymer high vis-cosity modified emulsified asphalt is significantly higher than other types of emulsified asphalt,but suffers lower storage stability than polymer modified emulsified asphalt.
polymer high viscosity modified emulsified asphaltevaporation residuesinterlayer shearstorage stability
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