Low-temperature SBS modified asphalt and preparation method thereof
A modified asphalt, low-temperature technology, applied in building insulation materials, building components, buildings, etc., can solve the problems of easy segregation, water stability and frost resistance of asphalt mixture, poor workability, etc.
Active Publication Date: 2022-06-21
中油路之星新材料有限公司
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Problems solved by technology
However, there are still many problems in the actual engineering application of rubber asphalt, such as high temperature viscosity, easy segregation, poor construction workability, and obvious impact on the water stability and frost resistance of asphalt mixture.
Method used
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Embodiment
[0021] Example: Preparation of Modified Asphalt:
[0022] Take 100 parts by mass of 70# base asphalt, heat it to 180 ° C until the asphalt is completely melted, add 20 parts of vinyl polysiloxane modified SBS, 3 parts of compatibilizer, develop for 1 hour, and then add 15 parts of vinyl polysiloxane Alkane-modified waste rubber powder, 5 parts of sulfur powder, 5 parts of polypropylene fibers, 3 parts of trifurfural extraction oil, and continued development for 1 hour.
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Abstract
The invention belongs to the technical field of traffic, and particularly relates to low-temperature SBS modified asphalt and a preparation method thereof.The low-temperature SBS modified asphalt is prepared from, by weight, 100 parts of matrix asphalt, 20-30 parts of vinyl polysiloxane modified SBS, 5-20 parts of vinyl polysiloxane modified waste rubber powder, 5-10 parts of asphalt stabilizer, 5-10 parts of polymer fiber and 2-6 parts of compatilizer. The rubber powder absorbs the volume expansion of light components in the asphalt through the sufficient swelling of the asphalt, the density difference between the rubber powder and the asphalt is reduced, and the sinking of rubber powder particles in the asphalt is prevented by virtue of a network structure formed by SBS in the asphalt, so that the storage stability problem of the composite modified asphalt can be effectively solved. The rubber powder particles and the SBS modifier are added to promote the elastic recovery of the composite modified asphalt, and a siloxane structure is introduced into the SBS and rubber powder structure, so that the defects of single use of the SBS and the rubber powder to modify the asphalt are overcome, the modified asphalt is more uniformly dispersed in the asphalt, a net structure is formed, and the modified asphalt is stable in quality and has better high and low temperature performance.
Description
technical field [0001] The invention relates to a modified asphalt, in particular to a low-temperature SBS modified asphalt and a preparation method thereof. Background technique [0002] Most of the existing highways in my country are asphalt pavements. However, with the continuous increase of traffic volume, heavy load and overload, frequent extreme weather and other factors, the highway industry has higher and higher requirements for the performance of asphalt pavement. To improve the road performance of asphalt pavement, reduce the occurrence of asphalt pavement diseases, and increase the service life of asphalt pavement, it is necessary to improve road building materials and construction technology, and the improvement of asphalt material performance is one of the most critical factors. Practice has proved that the modification of matrix asphalt can significantly improve the performance of asphalt pavement, and it is one of the most effective means to improve the high ...
Claims
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IPC IPC(8): C08L95/00C08L53/02C08L19/00
CPCC08L95/00C08L53/02C08L19/003Y02W30/62
Inventor 冯海波吕刚
Owner 中油路之星新材料有限公司