Anti-rut high-viscosity asphalt modifier, and preparation method and application thereof

Abstract

The invention discloses an anti-rut high-viscosity asphalt modifier, and a preparation method and application thereof. The anti-rut high-viscosity asphalt modifier is prepared from the following components in parts by mass: 10-30 parts of polyolefin, 10-30 parts of elastomer, 15-40 parts of tackifying resin and 1-20 rubber powder. The preparation method comprises the following steps: evenly mixing polyolefin, elastomer, tackifying resin and rubber powder in a mixer, carrying out melt extrusion, granulating and drying. The doping amount of the anti-rut high-viscosity asphalt modifier is 5-14% of the asphalt by mass. The anti-rut high-viscosity asphalt modifier disclosed by the invention can obviously enhance the 60 DEG C viscosity, softening point, low-temperature ductility and other technical indexes of the asphalt. The production technique of the anti-rut high-viscosity asphalt modifier is simple and convenient, and has the advantage of low cost.

Description

technical field [0001] The invention relates to a rutting-resistant high-viscosity asphalt modifier, and also relates to a preparation method and application of the rutting-resistant high-viscosity asphalt modifier. Background technique [0002] Asphalt pavement has become the most common pavement form in the world due to its advantages of good continuity, comfortable driving, low noise and easy maintenance. According to incomplete statistics, asphalt pavement accounts for 79% of paved roads in Japan. %, in China and some European countries, the proportion of asphalt pavement reaches 90%, while in the United States, about 95% of the pavement is asphalt pavement. However, due to the comprehensive effect of rapid increase in traffic volume, heavy axle load, channelized traffic and other factors, many asphalt pavements often have serious diseases after only a few years of opening to traffic, and rutting has become one of the most important forms of disease on asphalt pavements,...

AI Technical Summary

Problems solved by technology

CN200510112047.8 discloses a high-viscosity modified asphalt containing asphalt, styrene-isoprene-styrene block copolymer, polyethylene wax and sulfur. Its viscosity at 60°C can meet the technical requirements of high-viscosity asphalt. However, the low-temperature performance is still insufficient, and the amount of the modifier is too large (>14%), and the problem of high cost has not been solved; CN201010179374.6 discloses a method composed of SBS, petroleum resin, aromatic oil, antioxidant, lubricant, adhesive The high-viscosity anti-rutting asphalt modifier composed of sticking agent and initiator, the viscosity of the high-viscosity asphalt prepared at 12% (internal mixing) can reach 250KPa.s at 60°C, and the softening point is close to 100°C. The low-temperature performance is also relatively superior, but on the one hand, the amount of modifier is still high, and the production cost is difficult to control; on the other hand, the formula is relatively complicated, and the chemical substances in the raw materials will cause certain pollution to the environment during the production process; CN201110141325.8 A high-viscosity asphalt additive consisting of main agent, plasticizer, filler and stabilizer is disclosed. The modified asphalt has a viscosity of 106KPa.s at 60°C at a dosage of 10%, and its high and low temperature performance is also superior. However, its The viscosity at 135°C is greater than 3Pa.s, causing certain difficulties in construction

Overall, the development of cost-effective high-viscosity anti-rutting asphalt modifiers is not very mature in China.