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Anti-freezing asphalt mixture and preparation method thereof

An asphalt mixture and a mixture technology, applied in the field of asphalt mixture, can solve the problems of cracking of asphalt pavement and the need to improve the frost resistance of asphalt mixture, so as to reduce the generation and development of internal cracks, reduce water permeability, Good dispersion effect

Inactive Publication Date: 2021-07-30
上海繁荣道路建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in a cold environment, or in an environment with a large temperature difference between day and night, asphalt pavement is prone to cracking, and the antifreeze performance of asphalt mixture needs to be improved

Method used

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  • Anti-freezing asphalt mixture and preparation method thereof
  • Anti-freezing asphalt mixture and preparation method thereof
  • Anti-freezing asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A kind of frost-resistant asphalt mixture, each component and its corresponding weight are shown in Table 1, and it is prepared through the following steps:

[0068] S1. Stir and mix the aggregate and filler for 20 minutes under the conditions of 40°C and 300r / min to obtain the mixture A;

[0069] S2, heating the modified asphalt to 150°C, adding antifreeze, stirring and mixing at a speed of 200r / min for 40min to obtain the mixture B;

[0070] S3, add the mixture A into the mixture B, stir and mix for 60min under the conditions of 170°C and 200r / min, to obtain.

[0071] Among them, the modified asphalt is SBS modified asphalt;

[0072] The filler is slag powder;

[0073] Aggregate is 5-20mm continuously graded basalt crushed stone;

[0074] Antifreeze is composed of rubber powder and emulsified asphalt powder mixed in a weight ratio of 1:1;

[0075] The particle size D97 of the rubber powder in the antifreeze agent is 100 μm, and the particle size D97 of the emulsif...

Embodiment 2-6

[0077] A kind of frost-resistant asphalt mixture, the difference from Example 1 is that each component and its corresponding weight are shown in Table 1.

[0078] Each component and its weight (kg) in table 1 embodiment 1-6

[0079]

Embodiment 7

[0081] An antifreeze asphalt mixture, the difference from Example 3 is that the antifreeze agent is composed of rubber powder and emulsified asphalt powder in a weight ratio of 1:0.2.

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Abstract

The invention relates to the technical field of asphalt mixtures, and particularly discloses an anti-freezing asphalt mixture and a preparation method thereof. The anti-freezing asphalt mixture comprises the following components in parts by weight: 20-25 parts of modified asphalt; 50-60 parts of filler; 450-550 parts of aggregate; and 5-10 parts of an anti-freezing agent, wherein the anti-freezing agent is formed by mixing rubber powder and emulsified asphalt powder. The anti-freezing asphalt mixture disclosed by the invention has relatively good anti-freezing performance and is not easy to crack when being used in an environment with relatively large temperature difference.

Description

technical field [0001] The present application relates to the technical field of asphalt mixture, more specifically, it relates to a frost-resistant asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt mixture is a general term for mixtures made by mixing mineral aggregates and asphalt binders. It is mainly composed of asphalt, coarse aggregate, fine aggregate, and mineral powder, and some polymers and wood cellulose are also added. [0003] At present, the asphalt pavement formed by asphalt mixture is the main pavement type of roads in our country, and has been widely used in airport runways, bridge deck pavement, expressways, urban roads and other major roads. [0004] However, in a cold environment, or in an environment with a large temperature difference between day and night, the asphalt pavement is prone to cracking, and the antifreeze performance of asphalt mixture needs to be improved. Contents of the invention [0005] In order ...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2111/76C04B2201/50
Inventor 庞发银杨网富严仲宇凌国华
Owner 上海繁荣道路建设工程有限公司
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