Method for measuring permeability coefficient of asphalt concrete binding layer

A technology of asphalt concrete and permeability coefficient, which is applied in the direction of permeability/surface area analysis, measuring device, preparation of test samples, etc. It can solve the problems of long time consumption, low density, and inability to simulate permeability coefficient, etc., and achieves convenient test calculation and determination Convenience and the effect of solving key technical problems

Inactive Publication Date: 2019-07-26
XINJIANG AGRI UNIV
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Problems solved by technology

However, hydraulic asphalt concrete has high compactness and low density, and it takes a long time to measure the permeability coefficient; during the operation of the dam body, the core wall has to bear a high water head, and the above t

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  • Method for measuring permeability coefficient of asphalt concrete binding layer
  • Method for measuring permeability coefficient of asphalt concrete binding layer
  • Method for measuring permeability coefficient of asphalt concrete binding layer

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Embodiment

[0032] The first is the research and development of the mold, through image 3 The device completes the preparation of the asphalt concrete binding layer sample. The mold size is: the diameter of the upper cover is 101mm, the diameter of the middle hole is 20mm; the inner diameter of the lower foundation is 111mm, the outer diameter is 131mm; the central column and the lower foundation are connected by bolts, the height of the central column is 180mm, and the diameter is 20mm; the height of the steel film is 200mm, wall thickness 10mm, steel membrane embedded and lower foundation.

[0033] Sample preparation process: put the asphalt mixture into the steel film, cover the top cover and compact the first layer of asphalt concrete, the height of the first layer of asphalt concrete sample is 75mm, wait until the temperature of the lower layer of asphalt concrete drops to the specified range , and then put the second layer of asphalt mixture into the steel film, compact the second...

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Abstract

The invention provides a method for measuring the permeability coefficient of an asphalt concrete binding layer. The method includes the steps that a first layer of asphalt concrete and a second layerof the asphalt concrete are compacted and formed in a steel mold successively, a columnar asphalt concrete binding layer sample with a central hole is prepared, the horizontal seepage of the sample is measured by a triaxial seepage testing machine, and permeability parameters are obtained. According to the method for measuring the permeability coefficient of the asphalt concrete binding layer, the asphalt concrete sample with a certain diameter of an inner hole is prepared, the convenience is brought for measurement of the permeability coefficient of the asphalt concrete under three-dimensional stress, and the key technical problems of measurement of the permeability coefficients of hydraulic engineering asphalt concrete core-wall binding layers are solved.

Description

technical field [0001] The invention relates to a rock-soil test method, in particular to a method for measuring the permeability coefficient of an asphalt-concrete bonded layer. Background technique [0002] Roller-compacted asphalt concrete core walls are paved and rolled in layers along the dam axis, forming more discontinuous bonding layers in the core walls. Due to many problems, the interlayer bonding of asphalt concrete is not good, so the interlayer permeability coefficient does not meet the specification requirements. Under the operating conditions of the dam body, the asphalt-concrete bonding layer will generate seepage channels in the dam body, which threatens the anti-seepage safety and stability of the asphalt-concrete core wall dam. [0003] During the construction of RCC core wall dams, the asphalt-concrete joint surface is always the focus of everyone's concern, and it is also recognized as the weak link of the anti-seepage body. Combined with the quality, ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/36G01N15/08
CPCG01N1/286G01N1/36G01N15/0826
Inventor 何建新开鑫刘亮杨海华杨武
Owner XINJIANG AGRI UNIV
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