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High-modulus asphalt mixture and preparation method thereof

An asphalt mixture, high modulus technology, applied in the field of asphalt pavement materials, high modulus asphalt mixture and its preparation, can solve the problems of insufficient high temperature deformation resistance, etc., to solve rutting disease, improve flexibility and low temperature resistance performance , Improve the effect of project quality

Pending Publication Date: 2021-01-12
CHANGAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a high modulus asphalt mixture and its preparation method to solve the technical problem of insufficient high temperature deformation resistance of the high modulus asphalt mixture in the prior art

Method used

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  • High-modulus asphalt mixture and preparation method thereof
  • High-modulus asphalt mixture and preparation method thereof
  • High-modulus asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0047] This embodiment provides a high modulus asphalt mixture, which is made of the following raw materials in terms of mass fraction: 5.6% of the base asphalt, 6.0% of the high modulus additive as the base asphalt, and 50% of the mineral powder as the base asphalt , the balance is aggregate, and the sum of the mass fractions of raw materials is 100%.

[0048] The high modulus additive is ultra high molecular weight polyethylene.

[0049] Aggregate with a particle size in the range of 0-3mm, aggregates with a particle size in the range of 3-5mm, aggregates with a particle size in the range of 5-10mm and aggregates with a particle size in the range of 10-15mm The mass ratio of materials is 30:20:20:14.

[0050] The preparation method of the high modulus asphalt mixture of the present embodiment comprises the following steps:

[0051] Step 1, high modulus asphalt mixture raw material preparation:

[0052] Mix the graded aggregates evenly, store the mineral powder separately,...

Embodiment 2

[0059] The present embodiment provides a kind of high-modulus asphalt mixture, in terms of mass fraction, made of the following raw materials: base asphalt is 5.6%, high modulus additive is 6.0% of base asphalt, biomass heavy oil is as base asphalt 20%, the mineral powder is 50% of the matrix asphalt, the balance is aggregate, and the sum of the mass fractions of raw materials is 100%.

[0060] The high modulus additive is ultra high molecular weight polyethylene.

[0061] Aggregate with a particle size in the range of 0-3mm, aggregates with a particle size in the range of 3-5mm, aggregates with a particle size in the range of 5-10mm and aggregates with a particle size in the range of 10-15mm The mass ratio of materials is 30:20:20:14.

[0062] The preparation method of the high modulus asphalt mixture of the present embodiment comprises the following steps:

[0063] Step 1, prepare blended asphalt:

[0064] Add biomass heavy oil to base asphalt, and shear at a high speed o...

Embodiment 3

[0073] This embodiment provides a high modulus asphalt mixture, which is made of the following raw materials in terms of mass fraction: base asphalt is 5.6%, high modulus additive is 4.0% of base asphalt, and mineral powder is 50% of base asphalt , the balance is aggregate, and the sum of the mass fractions of raw materials is 100%.

[0074] The raw material specifications of high modulus additive, mineral powder and aggregate are all the same as in Example 1.

[0075] The preparation method of the high modulus asphalt mixture in this embodiment is basically the same as the preparation method of the high modulus asphalt mixture in Example 1.

[0076] The high and low temperature performance of the high modulus asphalt mixture in this example is: G* / sinδ at 70°C is 1004Pa; creep stiffness modulus at -12°C is 232MPa at 60s, and at -12°C at 60s The creep rate is 0.289.

[0077] Table 3 and Table 4 show the conventional road performance of this embodiment and the dynamic modulus...

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Abstract

The invention provides a high-modulus asphalt mixture and a preparation method, the high-modulus asphalt mixture is prepared from the following raw materials by mass fraction: 4.6%-6.6% of matrix asphalt, a high-modulus additive accounting for 4.0%-8.0% of the matrix asphalt, mineral powder accounting for 50% of the matrix asphalt, and the balance of aggregate, and the sum of the mass fractions ofthe raw materials is 100%, or 4.6%-6.6% of matrix asphalt, a high-modulus additive accounting for 4.0%-8.0% of the matrix asphalt, biomass heavy oil accounting for 20% of the matrix asphalt, mineralpowder accounting for 50% of the matrix asphalt and the balance aggregate, and the sum of the mass fractions of the raw materials is 100%. According to the invention, the high-temperature deformationresistance of the asphalt mixture can be improved, the structural track disease of the asphalt pavement is solved, the engineering quality of the asphalt pavement is improved, and the service life ofthe asphalt pavement is prolonged.Biomass heavy oil is added when the high-modulus asphalt mixture is prepared, so that the flexibility and the low-temperature resistance of matrix asphalt are improved, and the high-modulus asphalt mixture has better low-temperature crack resistance.

Description

technical field [0001] The invention belongs to the technical field of road engineering and relates to asphalt pavement materials, in particular to a high-modulus asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt pavement is a flexible pavement. Under the influence of moisture, aging, temperature and other factors, early diseases such as aggregate peeling, loose particles, and surface pits are not uncommon. Asphalt pavement often suffers from different types of functional damage and even structural damage before reaching the designed service life. As one of the most prominent and common diseases, rutting is seriously endangering the durability and service life of asphalt pavement. [0003] High modulus asphalt mixture has a much higher dynamic modulus than ordinary asphalt mixture, can effectively resist shear deformation and vertical deformation of pavement structure, has excellent high temperature performance and fatigue resistance, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B111/34
CPCC04B26/26C04B2111/0075C04B2111/343C04B2201/50C04B24/2611C04B14/14C04B14/28
Inventor 王朝辉左志武樊振通陆由付刘沪傅一王学成姜凤传朱锋
Owner CHANGAN UNIV
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