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Modified asphalt binder, mixture and preparation method thereof

A technology of asphalt mixture and modified asphalt, which is applied in the direction of building insulation materials, buildings, building components, etc., can solve the problems of easy aging and high temperature degradation, and achieve the effects of avoiding pollution, improving weather resistance, and avoiding the use of additives

Pending Publication Date: 2021-03-30
XIAN ZHONGLI ASPHALT CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned method of using natural asphalt, in order to stabilize the mineral particles in the natural asphalt, it is still necessary to use polymer modifiers, or use coupling agents and crosslinking agents, so there are still problems such as high temperature degradation and easy aging.

Method used

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  • Modified asphalt binder, mixture and preparation method thereof
  • Modified asphalt binder, mixture and preparation method thereof
  • Modified asphalt binder, mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Break 70 kg of butonite bitumen (ash content about 49%) to about 300 mesh, add 30 kg of SK-70 bitumen heated to 160°C at room temperature and stir, then raise the temperature to 175°C, and Grinding at this temperature and by means of a ball mill.

[0050] The trichlorethylene insolubles in the asphalt binder obtained account for 4.5% by volume of particles above 6 microns, and the average particle diameter is 2.6 μm (see figure 1 shown in the particle size distribution diagram), the penetration range is 10-25dmm.

Embodiment 2

[0052] Crumble 30 kg of Iranian rock bitumen (about 9% ash content) to about 300 mesh, add 70 kg of SK-70 pitch that has been heated to 160°C at room temperature and stir, then heat up to 175°C, and temperature and grind by ball mill.

[0053] The trichlorethylene insolubles in the asphalt binder obtained account for 10% by volume of particles above 6 microns, and the average particle diameter is 3.2 μm (see figure 2 shown in the particle size distribution diagram), the penetration range is 10-25dmm.

Embodiment 3

[0055] Crush 60 kg of Trinidad Lake asphalt (about 35% ash content) to about 300 mesh, add 40 kg of SK-70 asphalt heated to 160°C at room temperature and stir, then heat up to 175°C, And grind at this temperature and through a grinder.

[0056] The trichlorethylene insolubles in the asphalt binder obtained account for 10% by volume of particles above 6 microns, and the average particle diameter is 3.3 μm (see image 3 shown in the particle size distribution diagram), the penetration range is 10-25dmm.

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Abstract

The invention relates to a modified asphalt binder, a mixture and a preparation method thereof. The asphalt binder according to the present invention comprises natural asphalt and petroleum asphalt ina weight ratio of (30-70):(70-30), wherein the ash content in the natural asphalt is 60% or less in terms of the natural asphalt, and the volume ratio of particles having a particle diameter of trichloroethylene insoluble matter of 6 [mu]m or more in the asphalt binder is 10% or less. According to the invention, only petroleum asphalt and natural asphalt are used in the components of the asphaltbinder, so that the application of additives is avoided.

Description

technical field [0001] The invention relates to the field of pavement materials, in particular to a modified asphalt binder, a mixture and a preparation method thereof. Background technique [0002] Castable asphalt mixture and high modulus asphalt mixture are two types of special-purpose asphalt mixture respectively. Among them, high modulus asphalt mixture is characterized by high modulus, strong bearing capacity and long fatigue life, and is suitable for long-life asphalt Paving of pavement and heavy traffic pavement. The pourable asphalt mixture is self-compacting and does not require rolling, and is widely used in bridge deck paving and other projects. The binder of these two types of asphalt mixtures needs to use hard asphalt with small penetration as the binder. [0003] Foreign high-modulus asphalt mixtures use low-grade asphalt directly as a binder. However, due to problems such as oil source properties and processing technology, it is difficult for my country's ...

Claims

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Application Information

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IPC IPC(8): C08L95/00
CPCC08L95/00C08L2205/025
Inventor 曾赟姬小丽张巧宁张玲张紫阳赵全文韩筱东张晓宏
Owner XIAN ZHONGLI ASPHALT CO LTD
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