The invention relates to a high-
viscosity vibration attenuation polyurethane repairing material for sinking repairing of a
polyurethane cured
track bed of a high speed railway or a heavy haul railway. The high-
viscosity vibration attenuation polyurethane repairing material consists of a component A and a component B which are mixed and stirred together mechanically, wherein the
mass ratio of the component A to the component B is (1:0.9)-(1:1.5); the component A is a mixture of an HDI tripolymer and polymethylene
polyphenyl isocyanate ester; the
mass ratio of the HDI tripolymer to polymethylene
polyphenyl isocyanate ester is (3:7)-(6:4); the content of -NCO is 27-29%; and the component B consists of polyhydric
alcohol, a catalyst, a defoaming agent, a
moisture scavenger, an anti-aging agent, a
flame retardant and rubber granules. The high-
viscosity vibration attenuation polyurethane repairing material is characterized in that the polyhydric
alcohol is a mixture which consists of 6-functionality-degree
mannitol poly(
propylene oxide polyol) and 3-functionality-degree high molecular weight polyether
polyol with the molecular weight of 12000. According to the polyurethane repairing material provided by the invention, the
volume expansion ratio is 1-3%, the
compressive strength of 1 hour is greater than or equal to 12MPa, the
adhesion strength is greater than or equal to 6MPa, the
damping factor is 0.25-0.40, the accumulated
residual deformation is less than or equal to 0.5% after 5 million times of
fatigue loading, and the polyurethane repairing material can be applied to polyurethane cured
track bed sinking repairing and railway
ballast cured
track bed sinking repairing as well.