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Modified asphalt composition and production process thereof

A technology of modified asphalt and composition, which is applied in the treatment of dyed low-molecular organic compounds, dyed high-molecular organic compounds, building structures, etc., and can solve the problems of limited addition, difficult materials to handle, and high price of SBS.

Inactive Publication Date: 2011-06-01
HUNAN ZHICHENG ASPHALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of SBS is relatively expensive, and its addition amount is strictly limited. At the same time, the high molecular weight (molecular weight greater than 70,000) SBS elastomer with better modification effect is not easy to disperse in asphalt, and poor storage stability and high viscosity will lead to Materials that are difficult to handle (including processing, pumping, etc.)

Method used

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  • Modified asphalt composition and production process thereof
  • Modified asphalt composition and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1: Preparation of modified asphalt masterbatch.

[0047] Proportion of modified asphalt masterbatch (total weight part is 100):

[0048] 50 parts by weight of asphalt

[0049] Core-shell type modified filler 50 parts by weight

[0050] The asphalt is Jiangyin 70# asphalt, the core-shell modifier uses kaolin as inorganic particles, the particle size is 2-20μm, the shell polymer is SBS, and the weight ratio of inorganic filler to polymer is 80:20. Use a high shear emulsifier to disperse and mix, the mixing temperature is 150-180°C, the time is 60min, and the mixing speed is 4500 rpm / hour

[0051] Step 2: Preparation of reactive masterbatch

[0052] The distribution ratio of each group:

[0053] Asphalt 95 (parts by weight)

[0054] Sulfur 5 (parts by weight)

[0055] The asphalt is Jiangyin 70# asphalt, the sulfur is general industrial grade, the mixing temperature is 100°C, a high-shear emulsifier is used, the mixing time is 20 minutes, and the mixing speed is...

Embodiment 2

[0059] Adopt the same method in Example 1 to prepare modified asphalt masterbatch and reactive masterbatch, by weight: 100 parts of asphalt, 20 parts of modified asphalt masterbatch, 5 parts of reactive masterbatch, put in common asphalt stirring device Stir in medium temperature at 190°C and react for 20 minutes to obtain asphalt composition.

Embodiment 3

[0061] Step 1: Preparation of modified asphalt masterbatch

[0062] Modified asphalt masterbatch component distribution ratio (the total weight part is 100):

[0063] Asphalt 50 (parts by weight)

[0064] Core-shell modifier 40 (parts by weight)

[0065] SBS 10 (parts by weight)

[0066] The asphalt and core-shell modifier used are the same as in Example 1, and the SBS is Yuehua product XH-792. Use a high-shear emulsifier for mixing, the mixing temperature is 150-180°C, the mixing time is 60min, and the mixing speed is 4500 rpm.

[0067] Step 2: Preparation of reactive masterbatch

[0068] The preparation of the reactive masterbatch is the same as in Example 1.

[0069] Step 3: Preparation of asphalt composition

[0070] According to the weight ratio: 100 parts of asphalt, 15 parts of modified asphalt masterbatch, 3 parts of reactive masterbatch were placed in a common asphalt mixing device and mixed at a temperature of 195 ° C for 30 minutes to obtain a modified asphalt c...

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Abstract

The invention discloses a modified asphalt composition and a production process thereof. A filler with a core-shell structure is used alone or compounded with the polymer so as to be used as asphalt modifier. The production process comprises the following steps: preparing modified asphalt master batch and reactive master batch containing cross-linking agent respectively by using high shear equipment including a dual-roll rubber mixing machine, an internal mixer, an extruder, a high shear emulsifying machine, a colloid grind, and the like, and mixing the master batch and asphalt in a certain weight ratio in a common asphalt mixing device to generate the composition with the specified structure of the invention.

Description

technical field [0001] The present invention relates to an asphalt composition with high performance characteristics and its production process. Background technique [0002] It is well known that asphalt is used for road covering, but ordinary asphalt has a low softening point and tends to flow under high temperature in summer, resulting in defects such as rutting, extrusion, and foaming on the road surface. On the other hand, the high brittleness makes the road surface easy to crack in winter, and water enters the bottom layer of the road surface, causing the bottom layer of the road surface to corrode, which greatly reduces the service life of the road surface. With the continuous increase of traffic load, the service life of the maintenance cycle of ordinary pavement is also shortened, and the maintenance cost increases rapidly. At the same time, the increase in maintenance time has also seriously affected the traffic situation. The research and application of high-per...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K9/10C09C3/08C09C3/10
Inventor 戴先治李琦
Owner HUNAN ZHICHENG ASPHALT
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