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High-strength modified asphalt and preparation method thereof

A technology for modifying asphalt and polymer modifiers, which is applied in building components, building insulation materials, buildings, etc., and can solve the problem of strict mixing temperature requirements for asphalt mixtures, unfavorable long-term production and product storage, and easy pollution of pipelines and siltation. tank bottom and other problems, to achieve the effect of improving high temperature performance and low temperature performance, stable storage and easy production

Active Publication Date: 2021-04-06
JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And as the temperature rises and the axle load of the road surface increases, the ordinary modified asphalt concrete pavement can meet the requirements for the general load traffic section, but for some special road sections such as heavy lanes, intersections, service areas, and uphill slow travel, etc. The same modified asphalt will soon have defects such as rutting, which will reduce the driving comfort of the road surface and even reduce the driving safety of the road surface.
[0003] The main improvement measure of the existing technology is to blend and modify the matrix asphalt with high-volume rock asphalt powder or anti-rutting masterbatch to prepare high-strength modified asphalt. Although the strength has been improved, the rock asphalt powder has too much ash, which is easy to Precipitation, long-term production is easy to pollute the pipeline and silt the bottom of the tank, which is not conducive to long-term production and product storage. At the same time, due to the high viscosity, the mixing temperature of asphalt mixture is strict, which is not conducive to production and use.

Method used

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  • High-strength modified asphalt and preparation method thereof
  • High-strength modified asphalt and preparation method thereof
  • High-strength modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Prepare the high-strength modified asphalt of the present invention, specifically:

[0056] S1. Weigh 50g of polymer modifier (SBS:SEBS=3:2) of linear SBS modifier and SEBS modifier, 1000g of Shuanglong 70# base asphalt, and 150g of composite anti-rutting additive (asphalt particles: Qingchuan Rock asphalt=2:1), butyl hydroxyanisole 5g, furfural extract oil 30g, sulfur stabilizer 2g;

[0057] S2. Heat 70# matrix asphalt at 180°C to 190°C to a fluid state, stir and preheat for 0.5h, then add compound anti-rutting additives, and stir at 180±5°C for 2h;

[0058] S3. Then add a polymer modifier, use a shearing machine to shear at 170±5°C for 0.5h, and then stir and develop at 175±5°C for 2h;

[0059] S4. Then add furfural to extract the oil, stir and develop at 175±5°C for 0.5h, then add butyl hydroxyanisole and stir for 1h;

[0060] S5. Finally add sulfur stabilizer, stir and develop at 185°C±5°C for 4-5h to obtain high-strength modified asphalt.

[0061] Its performanc...

Embodiment 2

[0063] S1. Weigh 70g of linear SBS and SEBS polymer modifier (SBS:SEBS=3:4), 1000g of Shuanglong 70# base asphalt, and 150g of compound anti-rutting additive (asphalt particles: Qingchuanyan asphalt=2:1) , Butylated hydroxyanisole 5g, furfural extract oil 30g, sulfur stabilizer 2g;

[0064] S2. Heat the 70# matrix asphalt at a temperature of 180°C to 190°C to a fluid state, stir and preheat for 0.5h, then add a compound anti-rutting additive, and stir and develop at a temperature of 180±5°C for 2h;

[0065] S3. Then add a polymer modifier, use a shearing machine to shear at 170±5°C for 0.5h, and then stir and develop at 175±5°C for 2h;

[0066] S4. Then add furfural to extract the oil, stir and develop at 175±5°C for 0.5h, then add butyl hydroxyanisole and stir for 1h;

[0067] S5. Finally add sulfur stabilizer, stir and develop at 185°C±5°C for 4-5h to obtain high-strength modified asphalt.

[0068] Its performance is tested, and the test results are shown in Table 1.

Embodiment 3

[0070] S1. Weigh 90g of SBS modifier and SEBS polymer modifier (SBS:SEBS=1:2), 1000g of 70# base asphalt, and 150g of composite anti-rutting additive (asphalt particles: Qingchuan rock asphalt=3:1) , Butylated hydroxyanisole 5g, furfural extract oil 30g, sulfur stabilizer 2g;

[0071] S2. Heat 70# matrix asphalt at 180°C to 190°C to a fluid state, stir and preheat for 0.5h, then add compound anti-rutting additives, and stir at 180±5°C for 2h;

[0072] S3. Then add a polymer modifier, use a shearing machine to shear at 170±5°C for 0.5h, and then stir and develop at 175±5°C for 2h;

[0073] S4. Then add furfural to extract the oil, stir and develop at 175±5°C for 0.5h, then add butyl hydroxyanisole and stir for 1h;

[0074] S5. Finally add sulfur stabilizer, stir and develop at 185°C±5°C for 4-5h to obtain high-strength modified asphalt.

[0075] Its performance is tested, and the test results are shown in Table 1.

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Abstract

The invention relates to high-strength modified asphalt and a preparation method thereof. The high-strength modified asphalt comprises the following components in parts by weight: 40-90 parts of 70# matrix asphalt, 5-9 parts of a polymer modifier, 15-35 parts of a composite anti-rut aid, 0.5-1.5 parts of an antioxidant, 3-7 parts of an organic viscosity reducer and 0.2-0.4 part of a stabilizer. Different from existing single rock asphalt modification with a large mixing amount, composite modification has the characteristics that on the premise of reducing the mixing amount of rock asphalt, other materials such as petroleum resin are used for compounding or replacing rock asphalt to improve the high-temperature performance of asphalt, and on the premise of guaranteeing the high-temperature performance of asphalt, the modified asphalt is stable in storage and not prone to depositing at the bottom of a tank or polluting a production pipeline, and the asphalt production quality is guaranteed.

Description

technical field [0001] The invention relates to modified asphalt for road and bridge pavement, in particular to high-strength modified asphalt and a specific preparation method thereof. Background technique [0002] One of the main damage forms of expressways is road surface damage. Among the main diseases of asphalt pavement, rutting is especially common, and the damage to the road surface is also the most serious, which greatly increases the repair cost of the road surface. The rutting problem usually occurs in the high temperature period of the first summer. Some road ruts have a depth of 10-50mm, or even more than 100mm, which makes the road evenness worse, and symptoms such as network cracks, potholes, and pits will soon appear. . And as the temperature rises and the axle load of the road surface increases, the ordinary modified asphalt concrete pavement can meet the requirements for the general load traffic section, but for some special road sections such as heavy lan...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08L91/00C08L57/02C08L23/06C08L9/06C08L23/12C08K5/13C08K3/06
CPCC08L95/00C08L2201/08C08L2205/035C08L2205/025C08L2205/02C08L53/02C08L53/025C08L91/00C08K5/13C08K3/06C08L57/02C08L23/06C08L9/06C08L23/12
Inventor 潘友强庞一朋陈李峰张志祥
Owner JIANGSU SINOROAD TRANSPORTATION SCI & TECH CO LTD
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