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Modified asphalt and preparation method and application thereof

A technology of modified asphalt and asphalt, which is applied in the field of modified asphalt and its preparation, which can solve the problems of road surface damage, weakened road performance of modified asphalt, and low bond energy, and achieve improved production efficiency, excellent stability, and stable quality Effect

Active Publication Date: 2017-04-26
上海缤德新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bond length of the polysulfide bond is very long, the bond energy is low, and it is easier to break than the ordinary carbon-carbon double bond under the action of thermo-oxidative aging, thereby causing the degradation of the generated polymer network structure; the aging of the polymer Decomposition can also greatly weaken the pavement performance of modified asphalt, resulting in uncontrollable pavement damage results

Method used

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  • Modified asphalt and preparation method and application thereof
  • Modified asphalt and preparation method and application thereof
  • Modified asphalt and preparation method and application thereof

Examples

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preparation example Construction

[0065]

[0066] A kind of preparation method of modified asphalt, it comprises the following steps:

[0067] (1), mix asphalt and linear SBS modifier, shear, obtain the first mixture;

[0068] (2), adding stabilizer and auxiliary stabilizer to the first mixture and stirring to obtain the second mixture;

[0069] (3) After the linear SBS modifier swells and develops, add di-isooctyl phthalate into the second mixture, and stir to obtain modified asphalt.

[0070] Wherein, in step (1), the shearing temperature can be 200-220°C, preferably 210°C, the shearing speed can be 1500-1800 rpm, preferably 1800 rpm, and the shearing time can be 3-5h, preferably 4h.

[0071] In step (2), the stirring temperature can be 180-220°C, preferably 180°C, and the stirring time can be 1-2h, preferably 2h.

[0072] In step (3), the stirring time can be 1-2h, preferably 2h.

[0073]

[0074] A modified asphalt prepared by the above preparation method can be applied in road surface.

Embodiment

[0077] The preparation method of the modified asphalt of the present embodiment, it may further comprise the steps:

[0078] (1) Mix 100 parts of No. 70 petroleum asphalt with 4 parts of linear SBS modifier, shear, the temperature is 210 ° C, the speed is 1800 rpm, and the time is 4 hours to obtain the first mixture;

[0079] (2) Add 0.15 parts of sulfur and 0.15 parts of inorganic phosphoric acid into the first mixture and stir at a temperature of 180° C. for 2 hours to obtain a second mixture;

[0080] (3) After the linear SBS modifier swells and develops, add 1 part of di-isooctyl phthalate to the second mixture, and stir for 2 hours to obtain modified asphalt.

[0081] Among them, the asphalt is No. 70 petroleum asphalt, with a saturated content of 8%, an aromatic content of 42%, a softening point of 46.3°C, and a penetration of 68 at 25°C.

[0082] The molecular weight of the linear SBS modifier is 60,000, the block ratio of polystyrene and polybutadiene is 3:7, and the ...

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Abstract

The invention provides a modified asphalt and a preparation method and an application thereof. The modified asphalt is prepared from, in weight, 100 parts of asphalt, 3.5-6.5 parts of Linear SBS modifier agent, 0.15-0.3 parts of stabilizer, 0.1-0.15 parts of auxiliary stabilizer and 1-2 parts of di-2-ethylhexyl phalate. The modified asphalt is characterized by stability, aging resistance, excellent resistance to oxidation and aging, rutting resistance and fatigue resistance compared with ordinary modified asphalt. In practice, the preparation process of the modified asphalt is beneficial to continuous production in industry, thereby improving production efficiency.

Description

technical field [0001] The invention belongs to the technical field of asphalt production, and in particular relates to a modified asphalt and its preparation method and application. Background technique [0002] Because traditional asphalt is difficult to meet the requirements of modern traffic on road surface quality, modified asphalt with better performance than traditional asphalt has appeared in recent years. According to the "Technical Specifications for Highway Modified Asphalt Pavement Construction" (JTJO36‐98), modified asphalt refers to adding "rubber, resin, high molecular polymer, finely ground rubber powder or other fillers to the asphalt. Asphalt binder (modifier)" or "mildly oxidized asphalt" and other measures to "improve the performance of asphalt or asphalt mixture". Among them, thermoplastic rubber modified asphalt, especially styrene-butadiene-styrene block copolymer (SBS) modified asphalt, is the most widely used, accounting for 40% of the total modifie...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08K3/06C08K5/12C08K3/32E01C7/26
CPCC08L95/00C08L2201/08E01C7/265C08L53/02C08K3/06C08K5/12C08K2003/329
Inventor 颜川奇黄卫东周璐张家伟
Owner 上海缤德新材料科技有限公司
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