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Method for calculating internal pressure distribution of asphalt concrete pore material in gas seepage process

A technology of pore material and internal pressure, which can be used in calculations, special data processing applications, instruments, etc., and can solve problems such as affecting the service life of the overall structure and deblunting of steel bars.

Inactive Publication Date: 2018-11-23
中国建筑土木建设有限公司
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Problems solved by technology

For example, the asphalt concrete material is a barrier to ensure that the pore solution in the water-stabilized material is free from carbonization reactions; if the asphalt concrete lower layer is a cement concrete reinforcement mesh, the decrease in pH of the solution after carbonization may cause the steel bar to be blunt, etc. Thus affecting the service life of the overall structure

Method used

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  • Method for calculating internal pressure distribution of asphalt concrete pore material in gas seepage process
  • Method for calculating internal pressure distribution of asphalt concrete pore material in gas seepage process
  • Method for calculating internal pressure distribution of asphalt concrete pore material in gas seepage process

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Embodiment

[0056] Let the air pressure P at the inlet end be maintained 1 >1bar, outlet air pressure P 2 It is 1 atmospheric pressure, approximately 1 bar; such as figure 2 As shown, from top to bottom are the inlet air pressure P 1 =5bar, 4bar, 3bar, 2bar, 1.5bar, outlet P 2 = 1bar, seepage length L = 50mm under the steady-state condition of the gas pressure distribution curve inside the porous material, from figure 2 It can be seen that when x=0, the gas pressure value is the air pressure P at the intake end 1 , when x=L, the gas pressure value is the air pressure value P at the gas outlet 2 , when x is between 0 and L, the gas pressure value changes according to formula (1).

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Abstract

The invention provides a method for calculating internal pressure distribution of an asphalt concrete pore material in a gas seepage process. A calculation formula is shown in the following formula (1) defined in the specification, and the formula (1) is obtained by calculating gas flow of a gas inlet end and a gas outlet end under a steady state condition. In the formula, pg(x) is a gas pressurevalue of a position with a distance x from the gas inlet end; x is a distance between the interior of the asphalt concrete pore material and the gas inlet end, with a unit of m; P1 is a gas pressure value of the asphalt concrete pore material at the gas inlet end, with a unit of Pa; P2 is a gas pressure value of the asphalt concrete pore material at the gas outlet end, with a unit of Pa; and L isthe length of a seepage path. The internal pressure distribution condition of the pore material is obtained through the calculation method, so that the influence of the structural performance reasonsof the pore material on the service life of a building structure is avoided, the safety risk of the building structure is lowered, and the cost is reduced for construction units.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a method for calculating the internal pressure distribution of an asphalt concrete porous material during gas seepage. Background technique [0002] Existing expressway pavement is made of asphalt concrete, and its durability process is basically closely related to its pore structure and the material transport in the pore structure. Gas is one of the external erosive media affecting the durability of asphalt concrete materials, including O in the atmosphere. 2 and CO 2 Wait. For example, the asphalt concrete material is a barrier to ensure that the pore solution in the water-stabilized material is free from carbonization reactions; if the asphalt concrete lower layer is a cement concrete reinforcement mesh, the decrease in pH of the solution after carbonization may cause the steel bar to be blunt, etc. Thereby affecting the service life of the overall structure. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 陈艳明桂强马明磊
Owner 中国建筑土木建设有限公司
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