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Method for testing anti-cracking ability of paving interface of steel bridge deck slab and epoxy asphalt mixture

A technology of epoxy asphalt and steel bridge deck, which is applied in the direction of measuring device, analyzing materials, strength characteristics, etc., can solve the problems of destroying the integrity and continuity of the structure, corrosion of steel plates, shortening the service life of the road surface, etc., and achieves stable and reliable test results. , the equipment is simple and cheap, the test method is simple and easy to implement

Inactive Publication Date: 2017-05-31
NANJING UNIV OF SCI & TECH
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Problems solved by technology

On the one hand, it destroys the integrity and continuity of the structure, on the other hand, it will promote the further development of cracks, and the steel plate will be corroded under the erosion of rainwater, thus shortening the service life of the road surface

Method used

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  • Method for testing anti-cracking ability of paving interface of steel bridge deck slab and epoxy asphalt mixture
  • Method for testing anti-cracking ability of paving interface of steel bridge deck slab and epoxy asphalt mixture
  • Method for testing anti-cracking ability of paving interface of steel bridge deck slab and epoxy asphalt mixture

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Embodiment 1

[0037] combine Figure 1 to Figure 4 , a method for testing the crack resistance of the steel bridge deck and epoxy asphalt pavement interface, the method steps are as follows:

[0038] Step 1. Slowly heat the epoxy asphalt mixture to be tested and pour it into the mold for molding. After the pouring is completed, place it at room temperature to cool. When the demoulding condition is reached, remove the mold and transfer the test piece out of it to obtain a single-sided edge prepreg. Cuboid beam specimens with gaps, such as figure 2 As shown, after demoulding, put the sample into a constant temperature box that reaches the experimental temperature, and keep the temperature at 45°C for 60 minutes. The bonding material between the steel bridge deck and the pavement interface uses If-type epoxy asphalt, and its main technical properties are shown in Table 1.

[0039] Table 1 Technical properties of bonding materials

[0040]

[0041] The asphalt pavement adopts epoxy aspha...

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Abstract

The invention relates to a method for testing the anti-cracking ability of a paving interface of a steel bridge deck slab and an epoxy asphalt mixture. The method comprises the steps of reserving an aperture in the middle of a simulation sample, applying a load to the middle of the sample, detecting the load and midspan deflection of the sample in real time through a displacement sensor and a stress sensor, and working out the breaking energy Gf and interfacial breaking strength ffb of the paving interface of the steel bridge deck slab and the epoxy asphalt mixture according to a load-midspan deflection curve. According to the method for testing the anti-cracking ability of the paving interface of the steel bridge deck slab and the epoxy asphalt mixture, the equipment required by the testing method is simple and cheap, the testing method is simple, convenient and feasible, the testing result is stable and reliable, and due to the adoption of the interfacial breaking strength and breaking strength, the anti-cracking ability of the paving interface of the steel bridge deck slab and the epoxy asphalt mixture and a crack spreading situation can be accurately evaluated.

Description

technical field [0001] The invention belongs to the technical field of evaluating the interface between a steel bridge deck and an epoxy asphalt mixture pavement, and in particular relates to a method for testing the anti-crack performance of a steel bridge deck and an epoxy asphalt mixture pavement interface. Background technique [0002] Since steel plates and epoxy asphalt mixtures are two different materials, road damage usually occurs at the pavement interface of steel plates and epoxy asphalt mixtures during the steel bridge deck pavement process. The presence of crack resistance in the steel bridge deck-epoxy asphalt pavement interface significantly affects the service life and service level of the pavement. [0003] After the interface between the steel plate and the epoxy asphalt mixture pavement is cracked, repeated traffic loads will cause stress concentration at the crack tip under the action of various external factors such as temperature, resulting in large-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00
CPCG01N3/00G01N2203/0003G01N2203/0048G01N2203/0067
Inventor 李方超姚波
Owner NANJING UNIV OF SCI & TECH
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