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Method for testing dynamic modulus of asphalt concrete and device thereof

A technology of asphalt concrete and dynamic modulus, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of high cost, complicated operation, and insufficient equipment portability, etc., and achieve small size and easy operation of the device Effect

Inactive Publication Date: 2012-06-13
CHANGAN UNIV
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Problems solved by technology

But the portability of the device is insufficient, the operation is complicated and expensive
[0005] It can be seen that there is no relatively simple and perfect test method in the current test methods for studying the dynamic modulus of asphalt concrete. Therefore, it is urgent to find a test method that can not only truly and effectively simulate the actual road stress and environmental conditions, but also obtain mechanical parameters. method

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  • Method for testing dynamic modulus of asphalt concrete and device thereof
  • Method for testing dynamic modulus of asphalt concrete and device thereof
  • Method for testing dynamic modulus of asphalt concrete and device thereof

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] A method for testing dynamic modulus of asphalt concrete, comprising the following steps:

[0030] 1) Obtain hollow cylinder asphalt concrete specimen 3, the size of specimen 3 is a hollow cylinder shape with an outer diameter of 150mm, an inner diameter of 106mm, and a height of 115mm, and the two end faces of the asphalt concrete specimen are parallel and horizontal;

[0031] 2) Install the intensifier 4 inside the hollow cylindrical asphalt concrete specimen 3, then place the specimen in a constant temperature alcohol bath, and use the cooling device 1 to make the temperature of the alcohol bath reach the required test temperature, wherein the test temperature is based on the experimenter's The purpose and requirements of the research are set, and the temperature set by the experimenter is kept for at least 2 hours.

[0032...

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Abstract

The invention discloses a method for testing the dynamic modulus of asphalt concrete and a device thereof. The device comprises: acquiring a hollow cylindrical asphalt concrete test piece, the two end faces of which are mutually parallel and horizontal; installing an intensifier inside the hollow cylindrical asphalt concrete test piece, then placing the test piece in a thermostatic alcohol bath, utilizing a cooling device to make the temperature of the alcohol bath reach a required test temperature, which is set according to the research purpose and requirement of an experimenter; controlling a hydraulic pump and a transmission device with computer software, and providing internal annular pressure to the inner cavity of the hollow cylindrical asphalt concrete test piece through the intensifier; testing an annular pressure value and an average elastic strain so as to provide relevant data for calculating a dynamic modulus, and keeping a loading waveform unchanged during acquisition. The device consists of a cooling device, an alcohol bath, an intensifier, a hydraulic pump and a transmission device, as well as a data acquisition system. The method and device of the invention have the advantages of simple operation and high accuracy.

Description

technical field [0001] The invention relates to a dynamic modulus testing technology, in particular to a dynamic modulus testing method and device of asphalt concrete. Background technique [0002] The dynamic modulus of asphalt mixture is an important parameter in the design of asphalt pavement. In the AASHTO2002 asphalt pavement design guideline based on the mechanical experience method, the basic characteristic parameters of each layer of material need to be input to predict the dynamic response and performance of the pavement structure. Among them, the asphalt mixture The dynamic modulus of the material is one of the most important parameters. Currently, there are two commonly used methods for testing the dynamic modulus of asphalt concrete: [0003] Uniaxial compression test: This method is a method for determining the dynamic modulus of asphalt mixture proposed in the AASHTO-2002 design guide. However, the thickness of the asphalt layer is usually not enough to produ...

Claims

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Application Information

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IPC IPC(8): G01N3/10
Inventor 汪海年尤占平郝培文马骉张琛
Owner CHANGAN UNIV
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