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Method for determining shear strength of asphalt mixture

A technology of asphalt mixture and shear strength, applied in the direction of applying stable shear force to test material strength, material inspection products, etc., can solve the problems of high cost, poor test performance and poor simulation of road stress conditions , to achieve the effect of simple test process, great application value and stable test results

Inactive Publication Date: 2006-12-06
TONGJI UNIV
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AI Technical Summary

Problems solved by technology

[0002] At present, the equipment used to study the shear strength of asphalt mixtures is mainly the conventional methods such as triaxial test and equal height shear test. There are no other experimental equipment, and these equipment are generally expensive. Good simulation of the road surface force condition under the actual wheel load

Method used

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  • Method for determining shear strength of asphalt mixture
  • Method for determining shear strength of asphalt mixture
  • Method for determining shear strength of asphalt mixture

Examples

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Embodiment Construction

[0027] The example of applying the present invention can be:

[0028] (1) Using rotary compaction forming method, forming at least four parallel test pieces, the size of which is: both height and diameter are 100mm;

[0029] (2) Control the temperature of the test piece and the indenter in a 60°C environment box to ensure that the heat preservation time of the test piece is more than 4 hours;

[0030] (3) Carry out uniaxial penetration test, using an indenter with a diameter of 28.5mm to ensure that the position of the indenter is centered, the test temperature is 60°C, the loading rate is 1mm / min, load until failure, and collect the pressure and deformation during the test data;

[0031] (4) Analyze the collected data, as shown in the figure below, find out the failure inflection point in the stress-deformation curve, record the data of the inflection point, and average the data of the parallel specimens;

[0032] (5) Calculate the shear strength of asphalt mixture specimen...

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Abstract

The invention relates to the method used to confirm asphalt mixture shear strength, which adopts single shaft penetration test firstly. It includes the following steps: laying a steel pressure head on the test piece and pressurizing; calculating the shear strength by three-dimensional finite element calculation and mechanics formula derivation. This can confirm that the diameter of the steel pressure head is 28.5mm; the size of the test piece is 100*100mm; penetration strength is 1MPa; Poisson ratio is 0.35. The calculating formula of the shear strength is as follows: Tau=intensive parameter*penetration pressure. The penetration pressure is the damage inflection point value of the penetration strength curve.

Description

technical field [0001] The invention belongs to the field of road engineering and relates to the determination of the shear strength of asphalt mixture. Background technique [0002] At present, the equipment used to study the shear strength of asphalt mixtures is mainly the conventional methods such as triaxial test and equal height shear test. There are no other experimental equipment, and these equipment are generally expensive. It is a good simulation of the stress on the road surface under the actual wheel load. Contents of the invention [0003] The purpose of the present invention is to provide a method for determining the shear strength of asphalt mixture, which is economical, practical and highly operable. [0004] To achieve the above object, the solution of the present invention is: a method for determining the shear strength of asphalt mixture, comprising the following steps: [0005] A. Carry out uniaxial penetration test method to determine the penetration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N33/42
Inventor 孙立军毕玉峰张宏超邵显智胡小弟胡春华
Owner TONGJI UNIV
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