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Lean asphalt macadam transition layer mixed material and semi-rigid base asphalt pavement

A technology of asphalt crushed stone and transition layer, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving, can solve the problems of poor construction performance and loose surface of binder-free granules, etc. Reflective cracks and high compressive strength

Inactive Publication Date: 2017-07-21
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the surface of the graded crushed stone anti-crack transition layer is easy to loose and the elastic modulus is small, the present invention provides a kind of asphalt-poor crushed stone transition layer mixture, which is bonded by adding a small amount of asphalt to the graded crushed stone. agent to improve, so that the new material can not only have the crack resistance superiority of graded crushed stone, but also have the performance of asphalt crushed stone. Binder-free granular materials have construction shortcomings such as loose surface and poor construction performance, so as to ensure that the crushed stone can have large gaps, improve the modulus of the crushed stone, and finally achieve the purpose of improving the crack resistance of the material

Method used

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  • Lean asphalt macadam transition layer mixed material and semi-rigid base asphalt pavement

Examples

Experimental program
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Effect test

Embodiment 1

[0052] A bridge deck waterproof adhesive layer material, comprising the following components by weight percentage:

[0053] Asphalt: 2.5%, slag powder: 2.5%, the rest is aggregate, and the aggregate grading range is:

[0054] Aggregate with particle size less than 31.5mm accounts for 100% of the total mass of graded aggregate;

[0055] Aggregate with particle size less than 26.3mm accounts for 94.3% of the total mass of graded aggregate;

[0056] Aggregate with particle size less than 19mm accounts for 85.7% of the total mass of graded aggregate;

[0057] Aggregate with particle size less than 16mm accounts for 76.2% of the total mass of graded aggregate;

[0058] Aggregate with particle size less than 13.2mm accounts for 52.4% of the total mass of graded aggregate;

[0059] Aggregate with particle size less than 9.5mm accounts for 32.0% of the total mass of graded aggregate;

[0060] Aggregate with particle size less than 4.75mm accounts for 15.0% of the total mass of gra...

Embodiment 2

[0068] A bridge deck waterproof adhesive layer material, comprising the following components by weight percentage:

[0069] Asphalt: 2.55%, slag powder: 2.55%, the rest is aggregate, and the aggregate grading range is:

[0070] Aggregate with particle size less than 31.5mm accounts for 100% of the total mass of graded aggregate;

[0071] Aggregate with particle size less than 26.3mm accounts for 94.6% of the total mass of graded aggregate;

[0072] Aggregate with particle size less than 19mm accounts for 86.6% of the total mass of graded aggregate;

[0073] Aggregate with particle size less than 16mm accounts for 77.6% of the total mass of graded aggregate;

[0074] Aggregate with particle size less than 13.2mm accounts for 55.2% of the total mass of graded aggregate;

[0075] Aggregate with particle size less than 9.5mm accounts for 36.0% of the total mass of graded aggregate;

[0076] Aggregate with particle size less than 4.75mm accounts for 20.0% of the total mass of g...

Embodiment 3

[0084] A bridge deck waterproof adhesive layer material, comprising the following components by weight percentage:

[0085] Asphalt: 2.75%, slag powder: 2.75%, the rest is aggregate, and the aggregate grading range is:

[0086] Aggregate with particle size less than 31.5mm accounts for 100% of the total mass of graded aggregate;

[0087] Aggregate with particle size less than 26.3mm accounts for 95.0% of the total mass of graded aggregate;

[0088] Aggregate with particle size less than 19mm accounts for 87.4% of the total mass of graded aggregate;

[0089] Aggregate with particle size less than 16mm accounts for 79.0% of the total mass of graded aggregate;

[0090] Aggregate with particle size less than 13.2mm accounts for 58.0% of the total mass of graded aggregate;

[0091] Aggregate with particle size less than 9.5mm accounts for 40.0% of the total mass of graded aggregate;

[0092] Aggregate with particle size less than 4.75mm accounts for 25.0% of the total mass of g...

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Abstract

The invention discloses a lean asphalt macadam transition layer mixed material and a semi-rigid base asphalt pavement. The lean asphalt macadam transition layer mixed l material contains aggregates, mineral powder and a binder, wherein the aggregates include a coarse aggregate and a fine aggregate, the binder is asphalt and is prepared from, by mass, 2.5%-2.75% of asphalt, 75.2%-76.4% of coarse aggregate and 18.8%-19.1% of fine aggregate, and the ratio of the mineral powder to the asphalt is 0.8-1.2. The semi-rigid base asphalt pavement comprises an asphalt surface layer, a lean asphalt macadam transition layer and a semi-rigid base layer which are sequentially arranged from top to bottom, and the lean asphalt macadam transition layer is formed by laying the lean asphalt macadam transition layer mixed material. By utilizing the mixed material as the macadam transition layer, the mixed material can effectively absorb strain energy released when the base layer produces cracks and plays a reflection crack inhibiting effect, accordingly, the bearing capability of roads is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to an asphalt-poor macadam transition layer mixture and a semi-rigid base asphalt pavement. Background technique [0002] The semi-rigid base asphalt pavement has always been one of the main forms of the base structure of my country's high-grade highways. It has the characteristics of high rigidity, good water stability, and strong diffusion stress. However, the semi-rigid base asphalt pavement is prone to pavement reflection cracks during use, and a large number of reflection cracks will cause serious harm to the road: (1) Harm the stability of the road structure and make it lose its bearing capacity: the generation of cracks will cause serious damage to the road. The surface water enters the pavement structure to provide a channel, gradually infiltrates from the asphalt surface layer into the semi-rigid base layer, and under the coupling action of temperature,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26E01C7/32
CPCE01C7/32C04B26/26C04B2111/0075
Inventor 彭波曹宁魏翻范学勇巩伟耿九光华学礼李文瑛戴学臻杨帆张晓峰赵鑫
Owner CHANGAN UNIV
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