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Improved dynamic shear rheometer fixture and testing method

A technology of rheometer and fixture, which is applied in the direction of instruments, flow characteristics, measuring devices, etc., can solve the problems of inability to accurately simulate the real stress state of asphalt mixture, inability to accurately characterize asphalt binder, and the difference in the design life of asphalt pavement.

Inactive Publication Date: 2012-06-20
CHANGAN UNIV
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Problems solved by technology

The existing asphalt binder rheological performance test method is not based on characterizing the real contact condition between asphalt and mineral aggregate surface, so it cannot accurately characterize the real rheological behavior characteristics of asphalt binder, and the existing asphalt mixture performance evaluation methods cannot be accurate Simulate the real stress condition of asphalt mixture, so the performance of asphalt mixture cannot be accurately evaluated through indoor experiments, and there is a big difference between the design life of asphalt pavement and the actual use condition

Method used

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  • Improved dynamic shear rheometer fixture and testing method
  • Improved dynamic shear rheometer fixture and testing method
  • Improved dynamic shear rheometer fixture and testing method

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Embodiment Construction

[0019] see figure 2 , the present embodiment provides a clamp for an improved dynamic shear rheometer, including an upper clamp 5 and a lower clamp 4, and there are screws 6 around the upper clamp 5 and the lower clamp 4, wherein the upper clamp 5 is used for fixing the upper test Sheet 10, the lower clamp 4 is used to fix the lower test piece 9;

[0020] Between the upper test piece 10 and the lower test piece 9, it is used to place the tested asphalt layer 3, the tested asphalt layer 3 is located on the surface of the lower test piece 9, and the outer side of the lower test piece 9 is also pasted with a bottom layer to prevent the tested asphalt layer 3 from flowing out. Metal ring 8 of test piece 9.

[0021] In this embodiment, the upper jig 5 and the lower jig 4 have the same shape but different diameters. Therefore, the upper test piece 10 and the lower test piece 9 have the same shape but different diameters.

[0022] The above-mentioned upper test piece 10 and the l...

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Abstract

The invention discloses an improved dynamic shear rheometer fixture and a testing method with the fixture. According to the invention, the fixture of a dynamic shear rheometer is improved. With the improved dynamic shear rheometer fixture provided by the invention, a testing chip manufactured from any material can be fixed on the fixture by using screws, such that asphalt binder rheological characteristic testing based on a real mineral surface is possible. Therefore, an original stainless steel testing chip can be replaced by a mineral testing chip, such that the asphalt binder rheological characteristic in actual application can be determined more accurately.

Description

technical field [0001] The invention belongs to asphalt performance testing equipment, and relates to the improvement of an asphalt mixture rheological performance instrument for measuring the interface of real mineral materials, in particular to an improved dynamic shear rheometer fixture and its testing method, mainly for the original The fixture of the dynamic shear rheometer is improved. Using the improved dynamic shear rheometer (DSR) fixture, the aging condition of the asphalt film on the surface of the mineral material can also be simulated during the test process. By testing the asphalt rheology Properties are thus used to determine the asphalt's ability to resist rutting, fatigue, etc. Background technique [0002] Asphalt mixture is a composite material composed of mineral aggregates, mineral powder and asphalt with different particle sizes. Although the mass percentage of asphalt in the asphalt mixture is only about 3% to 6%, it has an important influence on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/00
Inventor 汪海年尤占平郝培文李磊
Owner CHANGAN UNIV
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