Composite high-viscosity modified asphalt and preparation method thereof

A technology of modified asphalt with high viscosity, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of unreported segregation test of modified asphalt, high viscosity of modified asphalt at 135°C, and limited amount of SBS added. , to achieve the effects of excellent thermal storage stability, excellent high and low temperature performance, and reduced segregation tendency
CN103819918AInactive Publication Date: 2014-05-28SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2014-05-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to composite high-viscosity modified asphalt and a preparation method thereof. The raw material comprises the following components by weight percent: 84-88% of heavy duty bitumen and 12-16% of modified compounds. The method comprises the following steps: mixing SBS, desulfurized colloidal particles and a compatilizer containing an epoxy group to prepare a modified compound; preparing modified particles after mechanically pelletizing; adding the modified particles to asphalt at 170-190 DEG C; melting and refining compound particles after shearing at a high speed for 30-60 minutes on a high-speed mixing emulsifier; transferring the sheared asphalt to a high-speed disperser, and agitating to obtain the composite high-viscosity modified asphalt. The composite high-viscosity modified asphalt prepared by using the method has the characteristics of stable heat storage, and excellent high and low temperature properties, has good economic benefits and environmental effects because of use of waste rubber, and is free of sulphur as a stabilizer, the construction viscosity can be reduced, the construction environment can be improved, and the problem that incompatible asphalt is difficult to stabilize is solved.
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Description

technical field

[0001] The invention relates to the field of asphalt improvement, in particular to a composite high-viscosity modified asphalt and a preparation method thereof. Background technique

[0002] As a cementing material, asphalt has the advantages of waterproof, insulation, corrosion resistance, etc., and has a good bonding effect with stone ore materials. It has been widely used as road construction materials for a long time. In recent years, with the increase of traffic volume and traffic load, people have put forward more stringent requirements for road paving asphalt materials, but ordinary asphalt is prone to rutting at high temperature and cracking at low temperature, which can no longer fully meet the actual needs. Adding a high content of polymer to asphalt to prepare high-viscosity modified asphalt can effectively improve the high and low temperature performance of asphalt. Therefore, people have been devoting themselves to the research and development o...

Claims

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