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Test method for testing dynamic shear creep property of bituminous mixture

A technology of asphalt mixture and creep performance, which is applied in the direction of testing the ductility of materials and testing the strength of materials by applying stable tension/pressure, which can solve the problem of expensive test equipment, complicated operation, and the inability to reveal the essence of asphalt mixture deformation, etc. problems, to achieve good dynamic shear creep characteristics, simple test operation, accurate and credible test results

Inactive Publication Date: 2014-01-29
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These test methods are generally complex in operation, expensive in test equipment, and simple in data analysis, which cannot reveal the essence of asphalt mixture deformation under dynamic loads.

Method used

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  • Test method for testing dynamic shear creep property of bituminous mixture
  • Test method for testing dynamic shear creep property of bituminous mixture
  • Test method for testing dynamic shear creep property of bituminous mixture

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Embodiment Construction

[0030] The scheme of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] Such as image 3 As shown, the deformation curve obtained from dynamic shear creep test of asphalt mixture is divided into three stages: compaction deformation period, deformation stabilization period and failure period.

[0032] The present invention comprises the steps:

[0033] 1) Forming asphalt mixture specimens: At least 3 parallel specimens shall be formed by rotary compaction, the height of the specimens shall be 110mm, the diameter shall be 150mm, and the porosity of the asphalt mixture specimens shall not be greater than 7%;

[0034] 2) Make the coaxial shear test piece: cut the mixed material test piece three times into two round cake-shaped test pieces with a height of 50 mm, drill a hole in the middle of the test piece with a hole diameter of 56 mm, and use an adhesive (such as Epoxy resin) is fixed together with the steel column and...

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Abstract

The invention relates to a test method for testing the dynamic shear creep property of bituminous mixture. The method comprises the following steps of: making a bituminous mixture coaxial shear test piece; performing coaxial shear repeated load test; determining the stable plastic deformation period of the bituminous mixture; and finally calculating the plasticity-elasticity ratio and shear rebound modulus in the plastic deformation stable period. According to the invention, the test operation is simple, the test result is accurate and credible, the mechanical significance of the evaluation index is clear, and the dynamic shear creep property of the bituminous mixture can be revealed well.

Description

technical field [0001] The invention relates to a method for testing the dynamic shear creep performance of asphalt mixture, which belongs to the field of road engineering. Background technique [0002] The dynamic shear creep performance of asphalt mixture mainly reflects the ability of asphalt mixture to resist permanent deformation under repeated vehicle loads, and is one of the main performance indicators in the design of asphalt mixture pavement performance. At present, the test methods used to evaluate the dynamic shear performance of asphalt mixtures are mainly transformed by adding repeated load conditions to the asphalt mixture shear test methods, such as repeated load triaxial tests, repeated loads and other high shear tests. Test method, no other method. These test methods are generally complex in operation, expensive in test equipment, and simple in data analysis, which cannot reveal the essence of deformation of asphalt mixture under dynamic load. Contents of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/14G01N3/28
Inventor 章毅李立寒耿韩吕天华
Owner TONGJI UNIV