High-modulus modifier composite of bituminous mixture and preparation method thereof

Abstract

The invention discloses a high-modulus modifier composite of a bituminous mixture and a preparation method thereof. The high-modulus modifier composite of the bituminous mixture comprises the following components in parts by weight: silica powder, thermoplastic butadiene styrene rubber, modified polyethylene, polyethylene, modified polypropylene, polypropylene, ethylene-vinyl acetate polymers, antiagers and bitumen. The preparation method of the high-modulus modifier composite of the bituminous mixture comprises the following steps of: weighing the components in the parts by weight according to a proportion; stirring the components, and raising temperature at the same time; then adding the silica powder, the antiagers and the bitumen to a molten mass, and stirring for uniformly mixing at 160-200 DEG C and under certain rotating speed; extruding through a screw extruder, cooling with normal temperature water, and cutting so as to obtain granular finished products. The invention enhances the elastic modulus, improves the adhesive property, enhances the high-temperature anti-rutting property, the water stable property and the ageing-resistant performance, obviously reduces the damages, i.e. rutting, process, bumps, cracks, pits, looseness, and the like, of bituminous pavements, has the advantages of simple processing process, prolonged service life and convenient use, omits a process link of modifying the bitumen and can be widely used for paving the bituminous pavements of roads.

Description

technical field [0001] The invention relates to a high modulus modifier composition for road engineering asphalt mixture and a preparation method thereof. Background technique [0002] As we all know, the cementing material of asphalt road surface is asphalt, which is a kind of thermoplastic material, which has the property of becoming soft at high temperature and brittle at low temperature, so asphalt pavement has oil flooding, rutting, yoke and other diseases in summer, and hardening, rutting and so on in winter. Cracking, loosening and other diseases, freeze-thaw cycles, rainwater infiltration, and aging of asphalt will cause damage to the pavement and loss of use function. [0003] In order to solve various diseases of asphalt pavement, road researchers are constantly studying prevention and solutions. From the perspective of improving material performance, such as modifying asphalt to reduce its temperature sensitivity and improve road performance; from the perspective...

AI Technical Summary

Problems solved by technology

my country's asphalt pavement has used modified asphalt materials for more than ten years. With the increase in the load capacity of road transportation vehicles in my country, the traffic volume of roads has also increased. If modified asphalt continues to be used, there are defects of high cost and relatively complicated process.