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Modified asphalt binder and preparation method and application thereof

A technology of modified asphalt and binder, applied in building insulation materials, building components, buildings, etc., can solve the problems of segregation, engineering hazards, uneven distribution of waste tire powder and matrix asphalt, etc.

Inactive Publication Date: 2021-07-30
上海繁荣道路建设工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the storage and transportation of waste tire powder modified asphalt binder at high temperature, tire powder may accumulate on the top of the asphalt binder or at the bottom of the asphalt binder due to the different density of waste tire powder and base asphalt , so that in the modified asphalt binder system, the distribution of waste tire powder and matrix asphalt is uneven, resulting in segregation, which affects the performance of waste tire powder modified asphalt, and brings serious harm to the actual project.
[0004] In view of the above-mentioned related technologies, the modified asphalt binder prepared by using waste rubber powder as a modifier has the defect of poor thermal storage stability

Method used

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

Examples

Experimental program
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Effect test

preparation example 1

[0078] A kind of montmorillonite modified sulfur, each component and its corresponding weight are as shown in table 1, and make through the following steps:

[0079] a. Stir and mix montmorillonite and water for 30 minutes at 25°C and 120 r / min to obtain suspension A;

[0080] b. Add coupling agent to suspension A and grind to obtain suspension B;

[0081] c. Add sulfur to suspension B, stir and mix at 25°C and 200r / min for 60min, then dry at 80°C for 4h, pulverize, and pass through a 200-mesh sieve to obtain montmorillonite-modified sulfur.

[0082] Wherein, the montmorillonite is calcium-based montmorillonite, the water is industrial water, and the coupling agent is silane coupling agent KH-560.

preparation example 2-5

[0084] A montmorillonite-modified sulfur, which differs from Preparation Example 1 in that each component and its corresponding weight are shown in Table 1.

[0085] Each component and its weight (kg) in table 1 preparation example 1-5

[0086]

preparation example 6

[0088] A montmorillonite-modified sulfur, which differs from Preparation Example 3 in that the montmorillonite is sodium-based montmorillonite.

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Abstract

The invention relates to the field of asphalt binders, and particularly discloses a modified asphalt binder and a preparation method and application thereof. The modified asphalt binder is composed of the following components in parts by weight: 100-200 parts of matrix asphalt; 15-30 parts of waste rubber powder; 5-10 parts of SBS; 3-5 parts of montmorillonite modified sulfur; 4-6 parts of an antioxidant; 2-4 parts of an activator. The preparation method of the montmorillonite modified sulfur comprises the following steps: stirring and mixing montmorillonite and water to obtain a suspension A; adding a coupling agent into the suspension A, and grinding to obtain a suspension B; and adding sulfur into the suspension B, uniformly stirring, drying, crushing and sieving to obtain the montmorillonite modified sulfur. The modified asphalt binder disclosed by the invention has relatively good heat storage stability.

Description

technical field [0001] The application relates to the technical field of asphalt binder, more specifically, it relates to a modified asphalt binder, its preparation method and application. Background technique [0002] Modified asphalt is a kind of external admixture such as rubber, resin, high molecular polymer, ground rubber powder or other fillers, or taking measures such as mild oxidation of asphalt to improve the performance of asphalt or asphalt mixture. Improved asphalt binders. It mainly uses base asphalt as raw material, adds a certain proportion of modifier, and disperses the modifier evenly in the asphalt by shearing, stirring and other methods, and at the same time, adds a certain proportion of stabilizer to prepare modified asphalt material. It mainly uses the good physical properties of modifiers to modify asphalt. [0003] With the development of the economy, the output of waste tires is increasing year by year. In order to realize "turning waste into treasu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L53/02C08K9/02C08K3/06C08K3/34C04B26/26
CPCC08L95/00C04B26/26C08L2205/03C04B2111/0075
Inventor 胡建明王本虎庞发银李锐康
Owner 上海繁荣道路建设工程有限公司
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