Ready-to-use high-dispersion high-viscosity modifier and preparation method thereof

Abstract

The invention provides a ready-to-use high-dispersion high-viscosity modifier and a preparation method thereof. The modifier comprises, by weight, 20-60 parts of polymer modifier, 5-10 parts of swelling agent, 20-45 parts of dispersing agent, 4-10 parts of plasticizer and 0.2-0.5 part of crosslinking agent. The method includes the following steps that first, the polymer modifier and the swelling agent are heated for 30-60 minutes at the temperature of 100 DEG C to be swelled to be in a flowing state, then the mixture is poured into the dispersing agent which is already heated to be in a flowing state, the plasticizer and the crosslinking agent are added, and then the mixture is sheared for 5-15 minutes through a high-speed shearing machine, wherein the rotating speed of the high-speed shearing machine is 1000-3000 r / min, and the temperature ranges from 140 DEG C to 180 DEG C; after completion, the mixture is poured into an evaporating vessel, then the evaporating vessel is put into a vacuum drying box of 120 DEG C to be kept warm for 1 h, and then the mixture is pulled into strips, extruded out and granulated through a single-screw extruder. The production cost is low, dispersion and evenness are excellent, the high-temperature stability of high-viscosity modified asphalt can be further improved, and social and economic benefits are remarkable.

Description

[0001] 【Technical field】 [0002] The invention relates to a direct-throwing high-dispersion high-viscosity modifier and a preparation method thereof. [0003] 【Background technique】 [0004] High-viscosity modified asphalt refers to a viscosity greater than 50,000 Pa·s at 60°C, which is suitable for drainage pavement and heavy traffic pavement. High-viscosity modified asphalt is currently mainly prepared by adding high-molecular polymer modifiers to petroleum asphalt. After petroleum asphalt is modified by polymer, it can significantly improve the high-temperature and low-temperature performance of petroleum asphalt, and improve the high-temperature anti-rutting and low-temperature anti-cracking performance of asphalt mixture. However, due to the differences in molecular weight, viscosity, and density between most polymers and asphalt, the solubility and dispersion properties of polymers and petroleum asphalt are poor, so large asphalt shears and colloid mill equipment must b...

AI Technical Summary

Problems solved by technology

[0007] At present, although several direct-input high-viscosity modifiers that are widely used in China partially solve the problems of poor dispersion and high-temperature stability, their unit prices are relatively high (such as the unit price of TPS direct-input materials in Dayou Construction in Japan is about 46,000 / t, the unit price of the HVA direct feeding material developed by the Highway Research Institute of the Ministry of Communications is about 42,000 / t, and the unit price of Lufeite high-viscosity asphalt modifier is about 35,000 / t)

Due to the high price of high-viscosity modifiers, it is bound to seriously affect the promotion and use of high-viscosity modifiers

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