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Construction method for improving interlayer connection between surface layer and semi-rigid base layer of asphalt pavement

A semi-rigid base, asphalt pavement technology, applied in the direction of roads, roads, and on-site coagulation pavement, etc., can solve the problems of different temperature shrinkage or expansion rate, large difference in elastic modulus, and inability to combine well. , to achieve the effect of improving anti-skid performance, improving adhesion and improving shear strength

Inactive Publication Date: 2018-06-01
SHANDONG JIAOTONG UNIV
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Problems solved by technology

[0010] (1) When paving, the temperature difference between layers is large, the temperature of the base layer is low, and the temperature of the newly laid asphalt is high. The two cannot be well combined, and it is easy to cause a weak bonding surface
[0011] (2) Since the asphalt surface layer and the base layer use different mixtures, the elastic modulus is very different, and the temperature shrinkage or expansion rate is also different, which is prone to slippage

Method used

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  • Construction method for improving interlayer connection between surface layer and semi-rigid base layer of asphalt pavement
  • Construction method for improving interlayer connection between surface layer and semi-rigid base layer of asphalt pavement
  • Construction method for improving interlayer connection between surface layer and semi-rigid base layer of asphalt pavement

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Embodiment Construction

[0034] A kind of asphalt pavement construction method in conjunction with the present invention, the steps are as follows:

[0035] Step 1: Prepare the semi-rigid base, usually the semi-rigid base is water-stabilized gravel base 001. Check the thickness, compactness, flatness, and road crown of the water-stabilized gravel base. If there is looseness, potholes, etc., it must be repaired first, and the base layer must be cleaned.

[0036] Step 2: Sprinkle emulsified asphalt penetration oil on the surface of semi-rigid base 001, the amount of penetration asphalt is 1.0kg / m 2 , forming a transparent layer 002.

[0037] Step 3: Sprinkle hot matrix asphalt sealant oil, and immediately spread 0-5mm thick and fine pre-mixed gravel, the amount of hot matrix asphalt is 0.9kg / m 2 , the amount of ready-mixed crushed stone is 6kg / m 2 ; Rolling, so that crushed stones are pressed into the hot hot matrix asphalt to form the seal layer 003.

[0038] Step 4: Before paving the asphalt conc...

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Abstract

The invention discloses a construction method for improving interlayer connection of an asphalt pavement. The method comprises the following construction process steps: (1) checking thickness, compactness, flatness, crown and the like of a base layer, carrying out refinishing, and sweeping the base layer cleanly; (2) carrying out priming treatment, and sprinkling priming oil to the surface of thebase layer; (3) sprinkling sealing oil; (4) carrying out heating treatment on a surface connecting layer of a completed base layer structure by using a pavement heating car, wherein during construction, the heating car drives at a constant speed to ensure that each unit is uniformly heated; (5) after heating, immediately spreading an asphalt surface layer, carrying out rolling as required, and sequentially completing the initial rolling, repressing and final rolling of the asphalt surface layer. According to the asphalt pavement construction method, due to the interlayer treatment measure, theinterlayer binding power of the asphalt pavement can be greatly improved, the generation and development of interlayer slip and reflection crack of the pavement are reduced, and water damaged phenomena such as scouring, pumping and pavement pot holes can be greatly reduced.

Description

technical field [0001] The invention relates to a construction method for asphalt pavement, which belongs to the technical field of road asphalt pavement construction technology. Background technique [0002] 1. my country's asphalt pavement structure includes: surface course, tie course and base course. The existing asphalt pavement construction basically meets the current traffic load and traffic growth requirements, but most of them have been damaged to varying degrees within the design period, that is, the interlayer shear strength cannot meet the design life requirements. Because the elastic modulus of the asphalt surface layer and the base layer is very different, if the interlayers cannot be properly bonded, it will often lead to premature occurrence of slippage, reflection cracks and other pavement interlayer diseases on the asphalt pavement. [0003] 2. The bonding quality of each structural layer of asphalt pavement is one of the main factors affecting the life of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32
CPCE01C7/32E01C7/325
Inventor 赵之仲王璐璐柳泓哲杨振宇刘桂强
Owner SHANDONG JIAOTONG UNIV
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