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Reactive organically modified active mineral, discontinuously graded asphalt mixture and preparation method thereof

A technology of asphalt mixture and modified asphalt, applied in the direction of solid waste management, climate sustainability, sustainable waste treatment, etc., can solve the problem of increasing the mixing time and temperature of the mixture, increasing the application cost of the asphalt mixture, asphalt mixing In order to achieve the effect of reducing the dosage, improving the lipophilicity of the surface and improving the comprehensive road performance

Active Publication Date: 2016-01-06
南京宁通智能交通技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in SMA asphalt mixture: 1. Due to the high binder content and mineral material void ratio, SMA is prone to leakage during production, transportation and use; It plays a stabilizing role in the asphalt mixture. The incorporation of wood fibers requires special machinery. At the same time, the incorporation of fibers into SMA asphalt mixtures with lignin fibers takes 10-15s longer than conventional AC mixtures. The higher mixing temperature and time brought some problems, such as: a large amount of energy consumption, asphalt aging and compaction difficulties, etc.; 3. Due to the absorption of wood fibers on asphalt, so, It is necessary to increase the amount of asphalt to make up for the loss caused by absorption, thereby increasing the mixing time and temperature of the mixture, and increasing the application cost of the asphalt mixture; 4. The incorporation of wood fiber will have a certain impact on the workability of the asphalt mixture. Impact
Therefore, it is necessary to find an effective and easy-to-operate mixture stabilization method, or to find a substitute for wood fiber; 5. The higher amount of asphalt in SMA asphalt mixture makes this type of asphalt mixture pavement have higher engineering construction cost

Method used

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  • Reactive organically modified active mineral, discontinuously graded asphalt mixture and preparation method thereof
  • Reactive organically modified active mineral, discontinuously graded asphalt mixture and preparation method thereof
  • Reactive organically modified active mineral, discontinuously graded asphalt mixture and preparation method thereof

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Effect test

Embodiment 1

[0060] The organically modified active mineral graded asphalt mixture of the present invention, wherein the dosage of the stabilizer is 10% of the asphalt mass, and the asphalt ratio is 5.5%.

[0061] Its configuration method includes the following steps:

[0062] 1) Put the SBS modified asphalt weighed at 5.5% according to the asphalt ratio (the mass of the modified asphalt to the aggregate mass) as 5.5%, put it into a small asphalt mixing device and heat it to 165-170°C, then mix it according to 10% mass Slowly pour the weighed stabilizer into the modified asphalt, while stirring continuously for 5-10 minutes, and keep the temperature within the range of 165-170°C;

[0063] 2) Prepare the aggregate according to the gradation, heat it to 165-170°C and transport it to the mixing building;

[0064] 3) Pump the stirred asphalt mixture to the mixing building according to the ratio of the mixture to prepare asphalt mixture. During this process, the temperature must also be kept w...

Embodiment 2

[0089] In the discontinuously graded asphalt mixture of organically modified active minerals of the present invention, the content of reactive organically modified active minerals is 15% of the asphalt mass, and the asphalt ratio is 5.5%.

[0090] Its configuration method includes the following steps:

[0091] 1) Put the SBS modified asphalt weighed at 5.5% according to the asphalt ratio (the mass of the modified asphalt to the aggregate mass) as 5.5%, put it into a small asphalt mixing device and heat it to 165-170°C, then mix it according to 0.4% mass Slowly pour the weighed stabilizer into the modified asphalt, while stirring continuously for 5-10 minutes, and keep the temperature within the range of 165-170°C;

[0092] 2) Prepare the aggregate according to the gradation, heat it to 165-170°C and transport it to the mixing building;

[0093] 3) Pump the stirred asphalt mixture to the mixing building according to the ratio of the mixture to prepare asphalt mixture. During t...

Embodiment 3

[0117] In the discontinuously graded asphalt mixture of organically modified active minerals of the present invention, the content of reactive organically modified active minerals is 15% of the asphalt mass, and the asphalt ratio is 5.0%.

[0118] Its configuration method includes the following steps:

[0119] 1) Put the SBS modified asphalt weighed at 5.0% according to the asphalt ratio (the mass of the modified asphalt to the aggregate mass) as 5.0%, put it into a small asphalt mixing device and heat it to 165-170°C, then mix it according to 0.4% mass Slowly pour the weighed stabilizer into the modified asphalt, while stirring continuously for 5-10 minutes, and keep the temperature within the range of 165-170°C;

[0120] 2) Prepare the aggregate according to the gradation, heat it to 165-170°C and transport it to the mixing building;

[0121] 3) Pump the stirred asphalt mixture to the mixing building according to the ratio of the mixture to prepare asphalt mixture. During t...

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Abstract

The invention discloses a reactive organic modified active mineral and gap-graded asphalt mixture and a preparation method thereof. The asphalt mixture contains modified asphalt, a stabilizer and an aggregate, wherein the stabilizer is the reactive organic active mineral, and the mass of the modified asphalt accounts for 5.0%-6.0% of the mass of the aggregate. Under the circumference that the fatigue life is not reduced, the gap-graded asphalt mixture disclosed by the invention has better wear resistance and lower compaction molding temperature; simultaneously, in various performance verification tests, including a drain-down test, a raveling test, an immersion Marshall test, a rutting test, a low-temperature small beam test and the like, compared with conventional SMA various road performances, the performances of the mixture are equivalent; furthermore, the organic modified active mineral can be used for replacing lignin fiber, the using amount of the asphalt is reduced, the cost is effectively reduced, the engineering construction cost is reduced, the environmental burden is reduced, and the economic and social benefits are obvious.

Description

technical field [0001] The present invention relates to a paving material for road pavement, in particular to a modified and reused product of industrial waste—phosphorus salt waste minerals, and a graded asphalt mixture of reactive organic modified active minerals and a preparation method thereof. Applied to new construction and maintenance projects of graded roads. Background technique [0002] Road engineering construction and maintenance consume a lot of resources, environment, and economy. Therefore, saving road construction investment costs and improving the level of asphalt pavement construction in our country are the keys to be solved urgently. SMA asphalt mixture is a type of asphalt mixture that is popularized and applied all over the world. SMA is a kind of asphalt mixture composed of asphalt, fiber stabilizer, mineral powder and a small amount of fine aggregate to fill the gaps in the framework of the discontinuously graded coarse aggregate. This asphalt mixture...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B18/12C04B26/26
CPCY02W30/91
Inventor 吴春颖李爱芳刘爱华刘开琼于明明
Owner 南京宁通智能交通技术研究院有限公司