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Simulation tester for self healing of asphalt concrete cracks

A kind of asphalt concrete and simulation test technology, applied in the direction of material inspection products, etc., can solve problems such as self-healing behavior of cracks that have not yet been developed, and achieve the effect of simple structure, reasonable design, and high degree of automation

Inactive Publication Date: 2012-11-21
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, although researchers at home and abroad have done a lot of research on the self-healing behavior of asphalt pavement fatigue cracks, they have not developed a method that can study the crack self-healing behavior of asphalt concrete under the single or coupled action of load and environment. special instrument

Method used

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  • Simulation tester for self healing of asphalt concrete cracks
  • Simulation tester for self healing of asphalt concrete cracks
  • Simulation tester for self healing of asphalt concrete cracks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Lever 1, counterweight fastening nut 2, counterweight 3, lower rail 4, pressure sliding rod 5, upper rail 6, loading frame 7, pulley 8, pull rope 9, locking pin 10, shaking wheel 11 , crank handle 12, crank connecting rod 13, coupling shaft 14, test wheel 15 etc. have formed the wheel load simulation device of the present invention. The upper slide rail 6, the lower slide rail 4 and the rigid water tank 27 are parallel to each other and ensure rigid connection in a vertical plane. The parallelism ensures that the loading frame 7 can reciprocate horizontally along the upper and lower rails, and the rigid connection ensures that the test wheel can apply sufficient load to the specimen; the contact surfaces of the upper rail 6 and the lower rail 4 and the pulley 8 are uniform. It is a groove type design, which ensures that the loading frame 7 will not escape from the slide rail. A "T"-shaped horizontal strut protrudes from the upper end of the loading frame, and its horiz...

Embodiment 2

[0047] The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention, such as Change the size or quantity of the test wheel 15 and change the size or quantity of the specimen holders 21, 22, 23 and 24, so as to test a plurality of specimens 25 at the same time, or change the specific structure of the loading device, or change the test wheel 15 loading methods, such as the test wheel 15 does not do horizontal reciprocating movement and the test piece 25 does reciprocating movement, or a group of evaporators 32 and heating pipes 35 are set in the rigid water tank 27, which can constitute a specific embodiment of the present invention. All should belong to the protection scope of the present invention, and will not be described in detai...

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Abstract

A simulation tester for self healing of asphalt concrete cracks comprises a main frame, a test control and data collection system, an environment simulation box, a rigidity water tank, a test piece, a test piece limit clamp, a wheel load simulation device, a test piece healing force application device, a loading frame horizontal reciprocating moving mechanism, a temperature environment control device and a water circulation system simulating humidity environment. The main frame is provided with the environment simulation box which is at least composed of an inner rigidity layer, an outer rigidity layer and a middle heat insulation layer. The rigidity water tank is installed on the bottom wall in the middle in the environment simulation box, the test piece and the test piece limit clamp are installed in the rigidity water tank, the wheel load simulation device is arranged vertically above one side of the test piece and contains test wheels in rolling fit with the corresponding test piece, a test piece healing force application and test device is arranged horizontally on the other side of the test piece, the wheel load simulation device contains a loading frame which is provided with the loading frame horizontal reciprocating moving mechanism, and the water circulation system simulating humidity environment is arranged under the rigidity water tank. The simulation tester is high in automation degree, accurate in control, capable of simulating and researching self healing actions of the asphalt concrete cracks under various work conditions, convenient to operate, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of engineering testing equipment, in particular to an asphalt concrete crack self-healing simulation tester. Background technique [0002] Most of the high-grade highways in the world use asphalt pavement structure, and the cracking of asphalt pavement is one of the most important early diseases of asphalt pavement, and it is also a road disease that has not been completely solved in the world. The generation of cracks not only destroys the integrity, continuity and aesthetics of the asphalt pavement, but also creates conditions for freeze-thaw and water damage, and finally forms the overall structural damage of the pavement, causing great economic losses and adverse social impacts. However, asphalt pavement with reasonable design and strict construction may avoid structural damage caused by cracks. The reason is that asphalt concrete is a viscoelastic-plastic material that has crack self-healing ability und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/38
Inventor 高丹盈汤寄予赵军齐新华
Owner ZHENGZHOU UNIV
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