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A non-destructive separation method of interlayer interface of asphalt pavement structure based on indoor forming

A technology of asphalt pavement and separation method, which is applied in the direction of analyzing materials, preparation of test samples, sampling, etc., can solve the problems of difficult to accurately define the interface boundary between asphalt pavement structure layers, expensive CT scanning equipment, complicated technical operation, etc., to achieve Rich in mesoscopic information, easy to promote and use, and obvious separation effect

Active Publication Date: 2021-10-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost of CT scanning equipment, high economic cost, complicated technical operation, and the difficulty of accurately defining the interface boundary between asphalt pavement structure layers, it is not conducive to the promotion of related technologies.

Method used

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  • A non-destructive separation method of interlayer interface of asphalt pavement structure based on indoor forming
  • A non-destructive separation method of interlayer interface of asphalt pavement structure based on indoor forming
  • A non-destructive separation method of interlayer interface of asphalt pavement structure based on indoor forming

Examples

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Effect test

Embodiment 1

[0045] Such as figure 1 As shown, the embodiment of the present invention provides a method for non-destructive separation of interlayer interfaces of asphalt pavement structures based on indoor forming, including the following steps S1 to S4:

[0046] S1. The lower structure of the asphalt pavement structure composite test piece is formed by indoor forming method;

[0047] In this example, if figure 2 For the structural layer shown in middle 5, the lower layer structure in the asphalt pavement structure composite specimen includes the middle surface layer structure in the upper-middle surface layer composite specimen, the lower layer structure in the middle-lower layer composite specimen, and the lower layer-base layer Base structure in composite specimens;

[0048] Wherein, the lower structure of the composite test piece is formed by a rotary compactor, a Marshall compactor, a static pressure forming machine or a wheel rolling forming machine.

[0049] Taking the forming m...

Embodiment 2

[0072] This embodiment is similar to Embodiment 1, except that a Marshall compaction instrument is selected when the composite test piece is formed.

[0073] During the molding process of the upper and lower structural layers of the composite test piece in this embodiment, according to the operation process of the Marshall compaction instrument, weigh the corresponding asphalt mixture with a mass of 1200g (standard Marshall test piece) or 4050g (large-scale Marshall test piece), and punch each side on both sides. 50 times (standard Marshall specimen) or 75 times (large Marshall specimen). The rest of the implementation process and operation steps are consistent with Embodiment 1.

Embodiment 3

[0075] This embodiment is similar to Embodiment 1, except that the static pressure method is used when the composite test piece is formed.

[0076] In the forming process of the upper and lower structural layers of the composite test piece in this embodiment, the test piece is a cylinder with a diameter of 100 mm, and the mass of the corresponding asphalt mixture is calculated according to formula 2 according to the operation flow of the static pressure method. After the asphalt mixture is filled into the test mold, start the static pressure equipment to gradually increase the pressure from 1MPa to 20-30MPa until the test piece reaches the predetermined height.

[0077] π×r 2 ×h×ρ=m (2)

[0078] In the formula, r is the radius of the specimen, 50mm; h is the set height of the specimen, mm; ρ is the Marshall standard compaction density, g / cm 3 ; m is the mass of asphalt mixture, g.

[0079] The rest of the implementation process and operation steps are the same as in Example...

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Abstract

The invention discloses a method for non-destructive separation of the interlayer interface of asphalt pavement structure based on indoor forming. In the method, the lower layer structure in the asphalt pavement composite structure test piece is first formed, and then a superstructure coated with oil-water mixture on both sides is placed above it. Thin isolation film, then forming the superstructure of the asphalt pavement composite structure specimen, and finally separating the upper and lower structural layers of the composite specimen along the interlayer interface along the central axis of the composite specimen. The invention realizes the non-destructive separation of the interlayer interface of the indoor formed asphalt pavement structure, and the separation effect is obvious. After separation, the interlayer interface between the upper and lower structural layers of the composite test piece is complete, the surface texture is clear, the structural features are obvious, the surface features are prominent, and the mesoscopic information Rich, to achieve the purpose of non-destructive separation of the interlayer interface of the indoor formed asphalt pavement structure. At the same time, the method of the invention has the advantages of accurate definition of the interlayer interface of the asphalt pavement structure, low economic cost, simple and convenient operation, easy popularization and use, and the like.

Description

technical field [0001] The invention relates to the technical field of asphalt pavement detection, in particular to a non-destructive separation method for interlayer interfaces of asphalt pavement structures based on indoor forming. Background technique [0002] Asphalt pavement is a multilayer layered system structure. Its structural composition often includes a surface layer, a base layer and a cushion layer. Each structural layer can be paved in two or three layers according to needs, and each structural layer is passed through the corresponding Adhesive material for sticking. However, under the joint action of vehicle load and external environment (such as temperature and humidity), the interlayer bonding material is prone to failure. In addition, the modulus and deformation coordination ability of each structural layer in the pavement structure are quite different, which often leads to the asphalt pavement failure. The layers of the structure fall off each other, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/42G01N19/04G01N1/28G01N1/36
CPCG01N1/286G01N1/36G01N19/04G01N33/42G01N2001/366
Inventor 宋珲黄恒伟黄杨权李林育任东亚杜健欢艾长发
Owner SOUTHWEST JIAOTONG UNIV
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