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Preparation method of modified asphalt

A technology for modifying asphalt and asphalt, used in building components, building insulation materials, buildings, etc., can solve problems such as easy cracks and affect the service life of roads, and achieve extended service life, improved asphalt surface performance, and excellent high and low temperature resistance. performance effect

Inactive Publication Date: 2015-04-29
CHINA NUCLEAR IND HUATAI CONSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cracks are prone to appear in the cold winter, seriously affecting the service life of the road

Method used

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Embodiment Construction

[0016] The present invention is further described in conjunction with the following examples.

[0017] A kind of preparation method of modified asphalt created by the present invention comprises the following steps:

[0018] Add 4% aromatic oil with a weight of 4% of the weight of the asphalt raw material to the asphalt raw material, and mix to form the base asphalt.

[0019] Then prepare the modified polymer, mix the star-shaped SBS rubber and polyethylene at a ratio of 1:1, and stir and mix at 150-180°C at a stirring speed of 600r / min to prepare the modified polymer.

[0020] Then prepare a composite modified polymer, stir the above modified polymer and diatomaceous earth at a ratio of 1:2 at 150-180°C at a stirring speed of 600r / min, and mix to form a composite modified polymer.

[0021] While adding the above-mentioned compound modified polymer that is 10% of the weight of the base asphalt to the base asphalt, it is sheared with a high-speed shearing machine at 1000r / min,...

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Abstract

The invention discloses a preparation method of modified asphalt. The preparation method comprises the following steps: firstly mixing aromatic oil and asphalt raw materials to form matrix asphalt; secondly preparing a modified polymer by using star-type SBS rubber and polyethylene, adding diatomite to the modified polymer to form a compound modified polymer, adding the compound modified polymer to the matrix asphalt, and performing high-speed shear mixing at a high temperature, wherein the high temperature and low temperature resistances and the aging resistance of the asphalt are improved; after the initially modified asphalt is cooled, heating the initially modified asphalt, and simultaneously adding wood fibers or polyester fibers to the initially modified asphalt so as to improve the abrasion resistance of the asphalt; when the asphalt is gradually cooled, adding mica powder and calcium borate to the asphalt, stirring, cooling to 80-100 DEG C, and adding polybrominated cyclodecane, silicone resin and hydrated alumina to improve the flame retardancy and smoke suppression of the asphalt; finally adding a cationic emulsifier and an ammonium chloride stabilizer. Therefore, the surface property of the asphalt is improved, and the asphalt pavement and the later maintenance of the paveement are facilitated.

Description

technical field [0001] The invention relates to the technical field of asphalt modification, in particular to a preparation method of modified asphalt. Background technique [0002] With the rapid development of the national economy, transportation is also developing in the direction of high speed, heavy load, and large flow. This not only requires the road foundation to be solid and firm, but also requires the road surface to be wear-resistant, high-temperature resistant, non-softening, smooth, smooth performance. At present, asphalt pavement is still the most used on high-grade highway pavement. Due to the limitation of asphalt's own performance, that is, the high and low temperature performance of asphalt is unstable, under the strong sunlight, asphalt is easy to age, making the sand and gravel on the road surface lose the role of binder, resulting in rutting, wrapping, Loose and potholes. Cracks are prone to appear in the cold winter, seriously affecting the service l...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L23/06C08L97/02C08L67/00C08L93/04C08K13/02C08K3/34C08K3/38C08K3/22C08K5/20C08J3/09
Inventor 张国刚姜亚伟吕业君
Owner CHINA NUCLEAR IND HUATAI CONSTR
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