A recycled asphalt pavement

A technology of reclaimed asphalt and recycled asphalt, which is applied to building components, building insulation materials, buildings, etc., can solve the problems of long construction period, easy expansion and reflection of base cracks, and waste of resources, so as to improve the comprehensive road performance and solve the two problems. Sub-aging, reduce the effect of construction difficulty

Inactive Publication Date: 2018-09-07
陕西长大博源公路养护科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adhesive layers need to be set between each surface layer to increase the bonding between layers. The thickness of the surface layer ranges from 15cm to 20cm. The process is complicated and the construction period is long
[0009] (2) Due to the large variability in the performance of recycled asphalt pavement materials, the blending ratio of recycled asphalt pavement materials is low. The standard requires that the blending ratio of recycled asphalt pavement materials is not higher than 30%, so the utilization rate of recycled asphalt pavement materials is low.
A large amount of recycled asphalt pavement materials is accumulated, which not only takes up a lot of land, but also pollutes the environment and wastes resources
[0010] (3) Due to the aging and agglomeration of the recycled asphalt mixture, the mixing temperature of the recycled asphalt mixture is high, the mixing time is long, the heating energy consumption is large, and the smoke and dust emissions of the mixing building increase, causing environmental pollution, and too high mixing temperature is easy to cause asphalt Secondary aging reduces road performance of recycled asphalt mixture
[0011] (4) Due to the aging and agglomeration of recycled asphalt mixture, recycled asphalt pavement materials are unevenly mixed with new aggregates and asphalt, and early asphalt pavement diseases such as local segregation, looseness, and rutting are prone to occur, so the regulation limits the blending of recycled materials quantity
[0012] (5) Due to dry shrinkage and temperature shrinkage, the regenerated base layer is prone to cracks, and under the action of traffic load, the cracks in the base layer are easy to expand and reflect to the surface layer, forming early cracks in the asphalt pavement.

Method used

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  • A recycled asphalt pavement
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Examples

Experimental program
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Embodiment 1

[0031] refer to figure 1, The regenerated asphalt pavement structure of this embodiment is the surface layer 1, the sealing layer 2, the base layer 3 and the cushion layer 4 from top to bottom.

[0032] The surface layer of this embodiment is a factory-mixed heat-recycled asphalt concrete with a single-layer layered structure, and the thickness is 4cm; the surface layer material consists of:

[0033] 70% of recycled asphalt pavement materials, 1% of modified asphalt materials, 1% of admixtures, and 28% of modified stone materials, among which recycled asphalt pavement materials are divided into 2 grades: 0mm~9.5mm and >9.5mm;

[0034] Composition and ratio of modified asphalt materials: modifier 3%, warm mix agent 2%, regenerant 5%, petroleum asphalt 90%, modifier is styrene-butadiene latex (SBR); warm mix agent is polyethylene wax; The regeneration agent is furfural extract oil; the petroleum asphalt is No. 70 road petroleum asphalt.

[0035] Admixture composition and ratio...

Embodiment 2

[0040] This embodiment differs from Embodiment 1 in that:

[0041] The sealing layer of this embodiment is a single-layer spraying modified emulsified asphalt; the modified emulsified asphalt material of the sealing layer consists of 40% petroleum asphalt, 1% asphalt emulsifier, 2% modifier, 57% water, the mark of petroleum asphalt No. 70; the asphalt emulsifier is alkylphenol polyoxyethylene ether OP series alkylphenol polyoxyethylene ether OP-9, the modifier is styrene-butadiene latex (SBR), and the spraying amount of modified emulsified asphalt for the sealing layer is 1.2 kg / m 2 .

[0042] The base of this embodiment is the in-situ cement-stabilized cold recycled mixture of single-layer layered structure, and the thickness is 20cm; Portland cement, the label is 32.5; the admixture is styrene-butadiene latex (SBR). The recycled material is a mixture of recycled asphalt pavement surface material and recycled asphalt pavement base material in any mass ratio.

[0043] The ...

Embodiment 3

[0045] The difference with embodiment 1 is:

[0046] The thickness of the surface layer in this embodiment is 8cm, and the material composition of the surface layer is: 90% of recycled asphalt pavement materials, 3% of modified asphalt materials, 3% of admixtures, and 4% of modified stone materials, wherein the recycled asphalt pavement materials are divided into 3 grades: 0mm~4.75mm, 4.75mm~9.5mm, ≥9.5mm.

[0047] The composition and ratio of modified asphalt materials: modifier 7%, warm mix agent 16%, regenerant 15%, petroleum asphalt 62%, modifier is natural rubber latex (NR), warm mix agent is microcrystalline wax, The regeneration agent is aromatic hydrocarbon oil, and the petroleum asphalt is No. 90 road petroleum asphalt.

[0048] Admixture composition and ratio: recycled asphalt mixture modifier 40%, recycled asphalt mixture warm mix agent 60%, recycled asphalt mixture modifier is rubber-plastic compound produced by Shaanxi Changboyuan Highway Maintenance Technology C...

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Abstract

The invention relates to a recycling asphalt pavement which comprises a cushion layer, a base layer, a sealing layer and a surface layer. The base layer is arranged on the cushion layer. The sealing layer is arranged on the base layer. The surface layer is arranged on the sealing layer. The surface layer is prepared from, by mass, 70-90% of recycling asphalt pavement material, 1-3% of modified asphalt material, 1-3% of first additive and the balance modified aggregated rock, wherein the sum of the mass percentages of all the components is 100%. By means of the recycling asphalt pavement structure and the surface layer material composition technology, the technical problems of recycling and pavement performance of the recycling pavement material are effectively solved, the blending ratio of the recycling pavement material is 60% or above, and the cyclic utilization rate within a certain area reaches 100%.

Description

technical field [0001] The invention relates to a pavement, in particular to a recycled asphalt pavement. Background technique [0002] The existing recycled asphalt pavement structures mainly include the following types: [0003] (1) An energy-saving and environment-friendly road, including a surface layer, and a base layer is arranged at the bottom of the surface layer. An energy-saving and environment-friendly road surface structure: asphalt gravel with a thickness of 7 cm is covered with modified asphalt concrete with a thickness of 5 cm. An energy-saving and environment-friendly road base layer has a thickness of 20 cm, and the base layer is made of fly ash gravel. The base layer of an energy-saving and environment-friendly road adopts screened waste asphalt pavement milling materials and crushed stones. The waste asphalt pavement milling material accounts for 20-50% in the base layer of an energy-saving and environment-friendly road. [0004] (2) A full-thickness r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/18C08L95/00C08L9/08C08L7/02C08L11/02C08L53/02C08L23/08C08L23/06C08K9/04C08K3/34
CPCC08L95/00C08L2205/035E01C7/187C08L9/08C08L23/06C08K9/04C08K3/34C08L53/02C08L23/0853
Inventor 徐培华蔡乾东商博明刘羽贾晓放童卫红
Owner 陕西长大博源公路养护科技有限公司
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