A rubber asphalt modifier improving asphalt performance and application thereof

A technology of rubber asphalt and modifier, applied in the field of asphalt modifier preparation, can solve problems such as application introduction in the field of road asphalt, uneven mixing of mixtures, limited applicability range, etc., to improve anti-reflection cracks and Anti-fatigue ability, prevent asphalt segregation, improve the effect of storage stability

Inactive Publication Date: 2019-05-21
XIAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the transportation of modified asphalt or rubber asphalt, due to the transportation distance and road conditions, segregation is easy to occur, resulting in poor stability of the asphalt
Especially when the rubber asphalt is preparing the mixture, due to the high viscosity of the rubber asphalt, the mixture will be mixed unevenly and the workability is poor.
These deficiencies will limit their use in the actual use of pavement
[0005] In the prior art, there are few studies on the activation of rubber powder, and the only few patents are mainly to improve the performance of rubber powder through external admixtures, and

Method used

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  • A rubber asphalt modifier improving asphalt performance and application thereof
  • A rubber asphalt modifier improving asphalt performance and application thereof
  • A rubber asphalt modifier improving asphalt performance and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] The rubber asphalt modifier for enhancing asphalt performance in this embodiment is made of the following parts by mass of raw materials: 20 parts of soft base asphalt, 57 parts of modified rubber powder, and 15 parts of modified conglomerate powder; The soft base asphalt is No. 90 base asphalt;

[0032] The preparation methods of the modified rubber powder and the modified conglomerate powder both include the following steps:

[0033] Step 1: Pre-cleaning the surface of rubber powder and conglomerate powder to remove oil and impurities, and then drying; the particle size of the rubber powder is 400 μm to 600 μm, and the particle size of the conglomerate powder is 300 μm to 600 μm;

[0034] Step 2. Place the dried rubber powder and conglomerate powder in the double-cathode plasma sputtering deposition furnace in the tray of the double-cathode plasma sputtering deposition furnace respectively. Select Ti with a mass purity of 99.9% as the target material, and u...

Example

[0038] Example 2 ~ Example 5

[0039] The difference between Example 2 to Example 5 and Example 1 is that in the preparation method of modified asphalt, the added amount of rubber asphalt modifier to enhance asphalt performance corresponds to 10%, 15%, and 10% of the mass of the base asphalt, respectively. 20%, 25%.

Example Embodiment

[0068] Example 6

[0069] The rubber asphalt modifier for enhancing asphalt performance in this embodiment is made of the following parts by mass of raw materials: 30 parts of soft base asphalt, 68 parts of modified rubber powder, and 25 parts of modified conglomerate powder; The soft base asphalt is No. 90 base asphalt;

[0070] The preparation methods of the modified rubber powder and the modified conglomerate powder both include the following steps:

[0071] Step 1: Pre-cleaning the surface of rubber powder and conglomerate powder to remove oil and impurities, and then drying; the particle size of the rubber powder is 400 μm to 600 μm, and the particle size of the conglomerate powder is 300 μm to 600 μm;

[0072] Step 2. Place the dried rubber powder and conglomerate powder in the double-cathode plasma sputtering deposition furnace in the tray of the double-cathode plasma sputtering deposition furnace respectively. Select Ti with a mass purity of 99.9% as the target material, and u...

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Abstract

A rubber asphalt modifier improving asphalt performance is disclosed, and is prepared from, by mass, 20-30 parts of soft-matrix asphalt, 57-68 parts of modified rubber powder and 15-25 parts of modified conglomerate powder, with the modified rubber powder and the modified conglomerate powder being prepared by double-cathode plasma sputtering processes. A preparing method of modified asphalt is also disclosed. The method includes mixing matrix asphalt and the rubber asphalt modifier and then developing the mixture to obtain the modified asphalt. Through modifying rubber powder and conglomeratepowder, dispersibility and compatibility of the rubber asphalt modifier in asphalt are improved, thus improving viscosity and the softening point of the asphalt, and allowing the asphalt to have better high- and low-temperature performance, elasticity restorability and stability. The preparing method is simple, and the prepared modified asphalt has high strength, good toughness, good water resistance, excellent temperature resistance, good fatigue resistance, and the like and has a wide promotion and application prospect.

Description

technical field [0001] The invention belongs to the technical field of asphalt modifier preparation, and in particular relates to a rubber asphalt modifier for enhancing asphalt performance and its application. Background technique [0002] As of the end of 2017, the total mileage of highways across the country was 4.7735 million kilometers, of which 622,200 kilometers were secondary roads and above, of which asphalt roads accounted for the vast majority. At present, the national road maintenance mileage ratio is as high as 98%, and the road mileage that needs to be repaired and maintained every year is very large. Since most of the asphalt modifiers used in maintenance are imported, this increases the cost of the pavement from the raw material side. If a modifier can be formed, its components mainly use waste materials, and it is easy to obtain and can partially replace imported products. It is an effective promotion to reduce the cost of pavement and realize the recycling...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08K3/34
Inventor 李海滨李文博赵桂娟郭平马庆伟张成雪唐国茜
Owner XIAN UNIV OF SCI & TECH
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