Anti-rutting anti-fatigue high-modulus composite modified asphalt and preparation method thereof

A composite modified asphalt, anti-fatigue technology, applied in building components, building insulation materials, construction and other directions, can solve the problems of insufficient rutting resistance and elastic deformation ability of asphalt, and achieve a good price advantage, simple production process, and production cost. low effect

Pending Publication Date: 2021-09-24
甘肃路桥善建科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies and defects of the prior art mentioned above, the purpose of the present invention is to provide a kind of anti-rutting and anti-fatigue high modulus composite modified asphalt and its preparation method to solve the problem of insufficient asphalt rutting resistance and elastic deformation ability in the prior art. technical problem

Method used

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  • Anti-rutting anti-fatigue high-modulus composite modified asphalt and preparation method thereof
  • Anti-rutting anti-fatigue high-modulus composite modified asphalt and preparation method thereof
  • Anti-rutting anti-fatigue high-modulus composite modified asphalt and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] A kind of anti-rutting and anti-fatigue high modulus composite modified asphalt, its ingredients are calculated by weight: 100 parts of domestic Zhenhai No. 90 base asphalt, 4 parts of SBS, 9 parts of composite natural rock asphalt, 3 parts of additives, and 0.3 parts of stabilizer ;

[0036] Preferably, the preparation steps are as follows:

[0037] (1) Heat the base asphalt to 140 °C, slowly put a certain proportion of additives and SBS into the container, stir and heat up, and keep it at about 180 °C for 20 minutes at high speed (shear speed 45000 rpm, temperature during shearing will rise, must ensure that the temperature is not higher than 180 ℃), to obtain SBS modified asphalt;

[0038] (2) After the shearing is stopped, the sample is put into a constant temperature heating mantle to keep the temperature at 180°C and continue mechanical stirring, slowly add a certain proportion of stabilizer and composite natural rock asphalt powder, and continue stirring for 3 h...

Embodiment 2

[0041] A kind of anti-rutting and anti-fatigue high modulus composite modified asphalt, its ingredients are calculated by weight: 100 parts of domestic Zhenhai No. 90 base asphalt, 4 parts of SBS, 10 parts of composite natural rock asphalt, 3 parts of additives, and 0.3 parts of stabilizer ;

[0042] Preferably, the preparation steps are as follows:

[0043] (1) Heat the base asphalt to 140 °C, slowly put a certain proportion of additives and SBS into the container, stir and heat up, and keep it at about 180 °C for 20 minutes at high speed (shear speed 45000 rpm, temperature during shearing will rise, must ensure that the temperature is not higher than 180 ℃), to obtain SBS modified asphalt;

[0044] (2) After the shearing is stopped, the sample is put into a constant temperature heating mantle to keep the temperature at 180°C and continue mechanical stirring, slowly add a certain proportion of stabilizer and composite natural rock asphalt powder, and continue stirring for 3 ...

Embodiment 3

[0047] A kind of anti-rutting and anti-fatigue high modulus composite modified asphalt, its ingredients are calculated by weight: 100 parts of domestic Zhenhai No. 90 base asphalt, 4 parts of SBS, 11 parts of composite natural rock asphalt, 3 parts of additives, and 0.3 parts of stabilizer ;

[0048] Preferably, the preparation steps are as follows:

[0049] (1) Heat the base asphalt to 140 °C, slowly put a certain proportion of additives and SBS into the container, stir and heat up, and keep it at about 180 °C for 20 minutes at high speed (shear speed 45000 rpm, temperature during shearing will rise, must ensure that the temperature is not higher than 180 ℃), to obtain SBS modified asphalt;

[0050](2) After stopping shearing, put the sample into a constant temperature heating jacket to keep the temperature at 180°C and continue to stir mechanically, slowly add a certain proportion of stabilizer and composite natural rock asphalt powder, and continue stirring for 3 hours to ...

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Abstract

The invention discloses anti-rutting anti-fatigue high-modulus composite modified asphalt which is prepared from the following raw materials: matrix asphalt, a styrene-butadiene-styrene triblock copolymer, an auxiliary agent, composite natural rock asphalt and a stabilizer. The modified asphalt produced by the invention has the advantages of high-temperature rut resistance, durability, aging resistance, water damage resistance and the like, and has relatively strong rut resistance and elastic deformation capacity, and the low-temperature performance of the modified asphalt is not influenced while the high-temperature stability of the asphalt is remarkably improved. Through the optimal proportion and interaction of multiple components, the modulus, high and low temperature performance and fatigue resistance of the modified asphalt are effectively improved, and the modified asphalt is suitable for being used in the fields of heavy traffic roads, airport pavements and the like. The preparation method is simple and easy to implement and low in preparation cost.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to an anti-rutting and anti-fatigue high modulus composite modified asphalt and a preparation method thereof. Background technique [0002] The rutting problem of asphalt pavement has been widely concerned by highway engineering researchers at home and abroad. According to incomplete statistics, the occurrence rate of rutting diseases accounts for more than 80% of the maintenance reasons of high-grade highways. At present, researchers at home and abroad have conducted a large number of experimental studies to improve the anti-rutting ability of asphalt concrete pavement. The research results show that the improvement of the performance of asphalt binder can significantly improve the anti-rutting ability of the mixture, and the asphalt binder with higher modulus can significantly improve the stiffness modulus of the mixture. The stronger the shear deformation a...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02
CPCC08L95/00C08L2205/03C08L2205/025C08L2201/08C08L53/02
Inventor 何正强王兆力
Owner 甘肃路桥善建科技有限公司
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