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High-modulus asphalt and preparation method thereof

A high-modulus, asphalt technology, used in building components, building insulation materials, buildings, etc., can solve the problem of no production method for high-modulus asphalt, high dynamic shear modulus at 64°C, and high storage modulus of asphalt mixtures. It can solve the problem of high temperature rutting and insufficient bearing capacity, high dynamic modulus and low modification cost.

Active Publication Date: 2014-06-04
SHANXI PROVINCIAL RES INST OF COMM
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] At present, there are many ways to realize high-modulus asphalt. The materials used include No. 30 road petroleum asphalt, No. 50 road petroleum asphalt, No. 70 road petroleum asphalt, No. 90 road petroleum asphalt, PE, thermoplastic elastomers, additives, etc., but currently There is no mature production method for high-modulus asphalt, which can make the modified asphalt produced have high rutting factor, high dynamic shear modulus at 64°C, small dynamic shear phase angle at 64°C, good low-temperature performance, and the mixed asphalt after mixing The characteristics of high storage modulus and high loss modulus

Method used

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  • High-modulus asphalt and preparation method thereof
  • High-modulus asphalt and preparation method thereof
  • High-modulus asphalt and preparation method thereof

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Embodiment 1-5

[0019] Asphalt composition: high-grade asphalt is selected from Shell No. 70 A-grade asphalt, and low-grade asphalt is selected from Karamay No. 30 A-grade asphalt; polystyrene-polybutadiene block copolymer thermoplastic elastomer is selected from Yanshan Petrochemical 4303 Star Modified agent, the molecular weight is 80,000-100,000, the molar ratio of styrene and butadiene is 1:2.33; the first auxiliary agent is selected from dibutyl phthalate, C9 resin, nitrile rubber and furfural extraction oil, the second The second auxiliary agent is polypyridine 3-methacrylate (PPy3MMA) with a molecular weight of about 17000. The mass content of each component is shown in Table 1. The polystyrene-polybutadiene block copolymer thermoplastic elastomer is the internal blending amount in the asphalt, and the additive is the external blending amount in the asphalt.

[0020] Each component content table 1 in embodiment 1-5

[0021]

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Abstract

The invention belongs to the technical field of preparation of modified asphalt and in particular relates to high-modulus asphalt and a preparation method thereof. The high-modulus asphalt is composed of asphalt, a polystyrene-polybutadiene segmented copolymer thermoplastic elastomer and an auxiliary agent, wherein the asphalt comprises high label asphalt and low label asphalt, the internal mixing amount of the low label asphalt in the high label asphalt is 10-80wt%, the internal mixing amount of the polystyrene-polybutadiene segmented copolymer thermoplastic elastomer in the asphalt is 2-7wt%, and the external mixing amount of the auxiliary agent is 0.51-15wt%. Compared with the prior art, the high-modulus asphalt has high dynamic modulus and good track resistance and is easy to prepare, processing flow is short, processing equipment is simple, technological conditions are mild, production is quick, and the modification cost is low.

Description

technical field [0001] The invention belongs to the technical field of modified asphalt preparation, and in particular relates to a high modulus asphalt and a preparation method thereof. Background technique [0002] Due to the incompatibility between the performance of traditional ordinary asphalt and mixtures and the current environment, some asphalt pavements were damaged on a large scale shortly after they were opened to traffic. Among the asphalt pavement diseases of expressways, rutting is the most serious. In the intersection sections of urban arterial roads and non-intersection sections with severe traffic channelization, as well as some road surfaces on expressways, excessive rutting will appear soon after opening to traffic. Moreover, the traffic accident rate in these road sections has increased significantly, seriously reducing the performance of the road. On highways and urban arterial roads, excessive rutting has resulted in reduced pavement performance, advan...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L9/02C08L57/00C08K5/12
Inventor 张宏武王瑞林李文良陈明星孔繁盛李智慧兰建丽刘伟周维锋祝海折
Owner SHANXI PROVINCIAL RES INST OF COMM
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