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Asphalt-aggregate interfacial fatigue testing method based on ultrasonic method

A technology of ultrasonic method and fatigue test, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, analyze materials, and test the strength of materials by applying repetitive force/pulsation force, etc. It can solve the problem of failure to reveal fatigue damage at the interface between asphalt and aggregate question

Active Publication Date: 2017-12-01
江苏创为交通科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current standard "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering JTG E20-2011" T0739-2011 four-point bending fatigue life test of asphalt mixture can only obtain the comprehensive index of overall damage of asphalt mixture, and fails to reveal the damage occurred in asphalt and aggregates. The nature of fatigue damage at the interface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of asphalt-aggregate interface fatigue test method based on ultrasonic method, described aggregate is rock mass,

[0023] Required Instruments: Branson Model Sonicator

[0024] The instrument is composed of power supply, transducer, three ultrasonic horns and probes. By adjusting the power supply, the resonance frequency consistent with the rock slice can be obtained; and the voltage increase and the amplitude increase are linear, and the amplitude of the ultrasonic wave can be changed by adjusting the voltage, thereby changing the energy transmitted to the rock slice, and further changing the rock slice and asphalt. Interfacial adhesion between films.

[0025] Materials needed:

[0026] "Rock slice-asphalt-rock slice" three-layer structure, the rock slice is obtained by drilling and coring, the cross-sectional radius is 1cm, and the thickness is 0.1cm.

[0027] The test includes the following steps:

[0028] (1) prepare upper and lower rock slices, specifica...

Embodiment 2

[0043] A kind of asphalt-aggregate interface fatigue test method based on ultrasonic method, described aggregate is rock mass,

[0044] Required Instruments: Branson Model Sonicator

[0045] The instrument is composed of power supply, transducer, three ultrasonic horns and probes. By adjusting the power supply, the resonance frequency consistent with the rock slice can be obtained; and the voltage increase and the amplitude increase are linear, and the amplitude of the ultrasonic wave can be changed by adjusting the voltage, thereby changing the energy transmitted to the rock slice, and further changing the rock slice and asphalt. Interfacial adhesion between films.

[0046] Materials needed:

[0047] "Rock slice-asphalt-rock slice" three-layer structure, the rock slice is obtained by drilling and coring, the cross-sectional radius is 2cm, and the thickness is 1cm.

[0048] The test includes the following steps:

[0049] (1) prepare upper and lower rock slices, specificall...

Embodiment 3

[0064] A kind of asphalt-aggregate interface fatigue test method based on ultrasonic method, described aggregate is rock mass,

[0065] Required Instruments: Branson Model Sonicator

[0066] The instrument is composed of power supply, transducer, three ultrasonic horns and probes. By adjusting the power supply, the resonance frequency consistent with the rock slice can be obtained; and the voltage increase and the amplitude increase are linear, and the amplitude of the ultrasonic wave can be changed by adjusting the voltage, thereby changing the energy transmitted to the rock slice, and further changing the rock slice and asphalt. Interfacial adhesion between films.

[0067] Materials needed:

[0068] The three-layer structure of "rock slice-asphalt-rock slice" is obtained by drilling and coring the rock slice, with a cross-sectional radius of 1.59cm and a thickness of 0.5cm.

[0069] The test includes the following steps:

[0070] (1) prepare upper and lower rock slices, ...

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PUM

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Abstract

The invention discloses an asphalt-aggregate interfacial fatigue testing method based on an ultrasonic method. The aggregate refers to rock. The method comprises the following steps: (1) preparing upper and lower rock slices; (2) preparing a 'rock slice-asphalt-rock slice'structural rock sample; (3) obtaining the maximum adhesive force of the asphalt-aggregate interface by virtue of an ultrasonic method; (4) performing cyclic fatigue loading through the asphalt-aggregate interface, and performing regression to obtain an interfacial failure fatigue equation; and (5) validating and correcting a fatigue failure model. According to the asphalt-aggregate interfacial fatigue testing method disclosed by the invention, the interfacial adhesive force and fatigue characteristics are unified together, the internal relations are researched and analyzed on the basis of obtaining the maximum interfacial adhesive force, the fatigue property of a local microstructure is unified with the fatigue property of the overall structure, and the fatigue development process of the overall structure can be estimated to the greatest degree so as to obtain the fatigue properties of a microscopic interface.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to an ultrasonic method-based asphalt-aggregate interface fatigue test method. Background technique [0002] Fatigue of asphalt mixture is a phenomenon caused by the accumulation of non-recoverable strength attenuation of materials under repeated loads. The traditional fatigue theory method uses the fatigue curve to characterize the fatigue properties of the material, which can be studied through the fatigue test of the laboratory small specimen by the phenomenological method. Indoor small-scale fatigue test methods include: three-point trabecular bending (four-point bending) test, mid-point loading trabecular bending test, cantilever beam test, indirect tensile test, rotating cantilever test, etc. The fatigue test can adopt two loading modes of controlled stress and controlled strain. The stress-controlled loading mode ensures that the peak-to-valley value of the applied...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N3/32
CPCG01N3/32G01N29/04G01N2203/0073
Inventor 马涛邓交龙陈田丁珣昊马康房占永
Owner 江苏创为交通科技发展有限公司