A preparation method and application of asphalt modified material based on activated waste rubber powder

Abstract

A preparation method of an asphalt modified material based on activated waste rubber powder, comprising the following steps: (1) preparation of epoxy acrylic block polymer: weighing 15-20 parts by weight of epoxy resin, 15-20 parts by weight of benzene The ethylene monomer is gradually heated to 85-95°C under the condition of ball milling and stirring, and then 5-10 parts by weight of acrylic monomer is slowly added dropwise, and the temperature is kept constant until the reaction is complete, and then the temperature is lowered to 20-25°C to separate out the grinding balls to obtain Epoxy acrylic block polymer; (2) Activation of waste rubber powder: 40-100 parts by weight of waste rubber powder and 4-8 parts by weight of desulfurizing agent are ground evenly, then put into 150-200 parts by weight of organic solvent and stirred at low speed To mix uniformly, then add 5-10 parts by weight of the epoxy acrylic acid block polymer obtained by step (1), high-speed shear homogenization to obtain mixed slurry, then dry the mixed slurry and reclaim the organic solvent therein, cool to normal temperature Afterwards, an asphalt modified material based on activated waste rubber powder is obtained. The invention can make the asphalt pavement have low temperature crack resistance and effectively prolong the service life.

Description

technical field [0001] The invention relates to a preparation method of an asphalt modified material, in particular to a preparation method and application of an activated waste rubber powder-based asphalt modified material. Background technique [0002] Tire is a kind of polymer material, which is extremely difficult to degrade. It takes hundreds of years to degrade in the soil. If it is disposed of randomly, it will not only waste land resources, but also cause serious harm to the environment. Therefore, the recycling of waste tires has become an urgent unresolved issues. Rubber asphalt can be obtained by making rubber powder from automobile waste tire rubber and adding it to base asphalt in a certain proportion. The asphalt pavement prepared with rubber asphalt not only has high resistance to deformation and fatigue cracking at low temperature, but also reduces road noise, effectively improving the road performance and driving comfort of asphalt pavement; at the same tim...

AI Technical Summary

Problems solved by technology

However, when the heating temperature exceeds 200°C, the asphalt is prone to short-term aging and reduces the service life of the asphalt

Patent CN107541081A discloses a preparation process of activated waste rubber powder modified asphalt. The invention patent activates waste rubber powder by microwave radiation, and uses 80 mesh waste rubber powder and asphalt to prepare modified asphalt by high-speed shearing. However, the microwave activation power will affect the degree of activation, and the scope of application of this method is limited.