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Device and method for testing permeability anisotropy of large-porosity bituminous mixture

A technology of asphalt mixture, permeability performance, applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problem of not considering the size of connected voids, the difference in permeability coefficient, and the direction of connected voids problems such as stability, to achieve the effect of small error and scientific calculation results

Active Publication Date: 2016-07-27
HOHAI UNIV
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Problems solved by technology

However, the overall porosity of the large-void asphalt mixture currently used does not consider the size of the connected voids, nor does it consider the directionality of the connected voids; the permeability coefficient currently used is only the permeability coefficient of a certain direction of the large-void asphalt mixture, and does not Consider the difference in permeability coefficient in different directions

Method used

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  • Device and method for testing permeability anisotropy of large-porosity bituminous mixture
  • Device and method for testing permeability anisotropy of large-porosity bituminous mixture
  • Device and method for testing permeability anisotropy of large-porosity bituminous mixture

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Embodiment Construction

[0030] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0031] Test device for anisotropy of permeability of asphalt mixture with large voids, such as figure 1 As shown, it includes a water supply tank 1, a test piece tank 6 and a water storage tank 3 connected in sequence, the water supply tank 1 is provided with a first water discharge port 2 and the water storage tank 3 is provided with a second water discharge port 4, and the test piece tank 6 is provided with a card slot 7 for fixing the cylindrical test piece 11 and the bottom plate 5 of the test piece groove 6 is provided with a dial to control the rotation angle of the cylindrical test piece 11. The water inlet end of the test piece groove 6 is ...

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Abstract

The invention discloses a device and method for testing permeability anisotropy of a large-porosity bituminous mixture.The device for testing permeability anisotropy of the large-porosity bituminous mixture is characterized by comprising a water feeding tank, a test piece tank and a water storage tank which are connected in sequence; the water feeding tank is provided with a first drain opening, and the water storage tank is provided with a second drain opening; the test piece tank is provided with a clamping groove used for fixing a cylindrical test piece, and a bottom plate of the test piece tank is provided with a dial so that the rotation angle of the cylindrical test piece can be controlled; the water inlet end of the test piece tank is connected with the water feeding tank, and the water outlet end of the test piece tank is provided with a valve and connected with the water storage tank; the top and the bottom of the cylindrical test piece and a gap between the cylindrical test piece and the clamping groove are each provided with a sealing structure for preventing water from seeping.By means of the device and method, the scientific basis is provided for evaluating permeability of the large-porosity bituminous mixture.

Description

technical field [0001] The invention relates to a test device and method for the anisotropy of the permeability of asphalt mixture with large voids. Background technique [0002] During heavy rainfall, the road surface paved with densely graded asphalt mixture will form a water film, which is prone to water drift or water slide, affecting road safety. The surface mixture of drainage asphalt pavement has a large void ratio, which has good rainwater permeability, reduces the thickness of the water film on the road surface, and can provide good driving safety. Therefore, higher permeability is the main aspect that distinguishes large void asphalt mixture from densely graded asphalt mixture. In order to evaluate the permeability of large-void asphalt mixtures, road workers usually design large-void asphalt mixtures using the overall void ratio and permeability coefficient: the larger the overall void ratio, the better the permeability of the asphalt mixture; The larger the per...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 陈俊陶莎孔燕殷小晶
Owner HOHAI UNIV
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