SBS modified asphalt

Abstract

The invention belongs to the technical field of road building materials, and particularly relates to SBS modified asphalt which comprises 30 parts of matrix asphalt, 10 parts of a modifier, 1 part ofpolyphosphoric acid, 4 parts of a compatilizer, 3 parts of a stabilizer, 20 parts of an auxiliary material, 17 parts of a high aromatic hydrocarbon organic solvent, 10 parts of rubber oil and 5 partsof an ultraviolet light absorber. The auxiliary material is a mixture of sodium polyvinyl amide, a carboxymethyl cellulose sodium compound, polyoxyethylene ether, sodium tripolyphosphate and sodium tetraborate; wherein the matrix asphalt is mixed asphalt formed by straight-run asphalt and oxidized asphalt; wherein the modifier is a mixed product obtained by mixing an SBS asphalt modifier, an RET asphalt modifier and an SBR asphalt modifier according to a ratio of 3: 1: 1. The invention is mainly used for providing the SBS modified asphalt, and the SBS modified asphalt is a chemically stable SBS modified asphalt, has good high-temperature performance and anti-rutting performance, and has thermal stability better than that of traditional SBS modified asphalt.

Description

technical field [0001] The invention belongs to the technical field of road building materials, in particular to a kind of SBS modified asphalt. Background technique [0002] SBS modified asphalt is based on base asphalt, and a certain proportion of SBS modifier is added to make SBS evenly dispersed in the asphalt by shearing, stirring and other methods. At the same time, a certain proportion of exclusive stabilizer is added to form an SBS blend. Material, using the good physical properties of SBS to modify asphalt, the most commonly used traditional SBS modified asphalt can significantly improve the high temperature, low temperature, fatigue and aging resistance of asphalt, and can comprehensively improve the performance of asphalt, so It is the most widely used in the world, and its modification process, construction process and quality control are also very mature. For the detailed introduction of SBS modified asphalt, please refer to the material science and The "SBS Mo...

AI Technical Summary

Problems solved by technology

[0003] (1) The price of SBS asphalt modifier is relatively high, and its dosage must reach a certain level to have a good modification effect; secondly, the requirements for modification equipment and modification process are relatively high, mainly for the core equipment— Colloid mill, in the past few years, my country was unable to produce the colloid mill that meets the requirements. This equipment can only be imported from abroad. Because the patented technology is monopolized by large foreign manufacturers, not only the equipment price is high, but the equipment maintenance in the later period is also a big problem. problem;

[0004] (2) At present, although the colloid mill with better performance has been produced in China, there are many varieties in the market, good and bad, and there are not small differences between the equipment of different manufacturers, resulting in different modification processes, which greatly affects the improvement. As for the industrial batch production of polymer modified asphalt, this method can better guarantee the quality of asphalt, but in actual engineering, the distance between the construction site and the factory is relatively far, and the modified asphalt needs special equipment to reach the use site. Long-distance transportation of vehicles will undoubtedly increase the cost of road construction

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