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High-modulus asphalt and preparation method thereof

A high-modulus, asphalt technology, applied in building components, building insulation materials, buildings, etc., can solve the problems of unfavorable low-temperature performance of asphalt, limited reserves of natural asphalt, unfavorable environmental protection, etc. , the effect of convenient industrial application

Active Publication Date: 2021-05-28
SHANDONG CHAMBROAD PETROCHEMICALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-modulus asphalt is generally achieved through three channels. One is to use hard asphalt. Although the high-temperature resistance of hard asphalt mixture has been effectively verified, its low-temperature performance is poor; the other is to add natural asphalt, which can improve the asphalt. High-temperature rutting resistance, load-bearing capacity and durability of the mixture, but natural asphalt reserves are limited, and its low-temperature performance is also poor; the third is to prepare high-modulus asphalt by adding modifiers to asphalt. agent and modification process, while improving the overall modulus and high-temperature performance of the material, it will not lose too much low-temperature performance
[0007] The raw materials of polyolefin and waste rubber powder are often used in the preparation of existing high modulus asphalt. The waste rubber powder is easy to volatilize and unpleasant smell during the production and use of high modulus asphalt, which is not conducive to environmental protection, while polyolefin Materials such as PP, PE, and resins can significantly increase the modulus of asphalt, but at the same time have a very adverse effect on the low temperature performance of asphalt

Method used

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  • High-modulus asphalt and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] No. 40 low-grade asphalt (penetration 37dmm, softening point 53.5 ℃), from two kinds of crude oil in the Middle East cut by real boiling point, the raw material is 500 parts; polymer modifier 791SBS is 22.5 parts; Boyue stabilizer is 1 part; Guangzhou Hongmian Deodorant is 0.015 parts.

[0043] Preparation method: Add SBS modifier to base asphalt, raise the temperature to 180°C, use a shearing machine to shear at a shear rate of 4500r / min for 0.5h, transfer to a constant temperature heating mantle, and add stabilizer , constant temperature at 177°C, stirring at a speed of 800r / min for 1.0h, then transferred to an oven at the same temperature for static development / defoaming for 20min, and then sample preparation.

Embodiment 2

[0045] No. 40 low-grade asphalt (penetration 40dmm, softening point 52.5°C), which is obtained from two crude oils from the Middle East and Canada by cutting the real boiling point. The raw material is 500 parts; polymer modified asphalt 791SBS is 23 parts; Zhongquan protection is stable The agent is 1.1 parts; the Tianjin Haitai deodorant is 0.005 parts.

[0046]Preparation method: Add SBS modifier to base asphalt, raise the temperature to 180°C, use a shearing machine to shear at a shear rate of 4500r / min for 0.5h, transfer to a constant temperature heating mantle, and add stabilizer , constant temperature at 177°C, stirring at a speed of 800r / min for 1.0h, then transferred to an oven at the same temperature for static development / defoaming for 20min, and then sample preparation.

Embodiment 3

[0048] No. 40 low-grade asphalt (penetration 43dmm, softening point 51.5°C) is obtained from a certain crude oil in the Middle East by cutting it at the real boiling point. The raw material is 500 parts; polymer modified bitumen 791SBS is 24.5 parts; Boyue stabilizer is 1.2 parts ; Zhonghai Shunda deodorant is 0.01 part. Preparation method: Add SBS modifier to base asphalt, raise the temperature to 180°C, use a shearing machine to shear at a shear rate of 4500r / min for 0.5h, transfer to a constant temperature heating mantle, and add stabilizer , constant temperature at 177°C, stirring at a speed of 800r / min for 1.0h, then transferred to an oven at the same temperature for static development / defoaming for 20min, and then sample preparation.

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Abstract

The invention provides high-modulus asphalt. The high-modulus asphalt comprises the following components in parts by weight: 100 parts of low-grade matrix asphalt; 4.0 to 5.5 parts by weight of a polymer modifier; 0.01 to 0.1 part by weight of an odor removing agent; and 0.2 to 0.3 part by weight of a stabilizing agent; wherein the needle penetration of the low-grade matrix asphalt is 37-43 dmm, and the softening point of the low-grade matrix asphalt is 51 DEG C or above. On the one hand, the low-grade asphalt is directly adopted as a raw material, so that the process that hard asphalt needs to be used for blending when high-grade asphalt is adopted is omitted; on the other hand, the low-grade asphalt is used as the raw material, and the specific modifier is added, so that the modulus of the material is improved, and the low-temperature performance of the material is also improved; besides, the raw materials used in the invention are simple, raw materials such as waste rubber powder with unpleasant odor at high temperature do not need to be used, and the asphalt odor removing agent is added in the preparation process, so that the high-modulus asphalt is more environment-friendly and easier to popularize in the use process.

Description

technical field [0001] The invention relates to the technical field of high modulus asphalt, in particular to a high modulus asphalt and a preparation method thereof. Background technique [0002] The combination of semi-rigid base and surface course is most commonly used in the design of expressways in my country. This combination has certain tensile strength, fatigue resistance and good water stability characteristics, so it is widely used, but the actual use process Among them, the defects of the semi-rigid asphalt pavement are gradually appearing, for example, it is prone to temperature shrinkage and drying shrinkage cracks, and the adhesion with the asphalt surface layer is weak, so that the service life of the semi-rigid asphalt pavement in China usually cannot meet the design requirements and standards. . Expressways that have been opened to traffic rarely reach the 15-year service life stipulated in the design specifications. Most expressways need to be repaired on a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02
CPCC08L95/00C08L53/02Y02A30/60
Inventor 金萍张永翰石丽娜王贝祁聪刘建伟王耀伟栾波
Owner SHANDONG CHAMBROAD PETROCHEMICALS CO LTD