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Device for measuring oxygen diffusion coefficients in concrete with different saturations under action of continuous tension and compression

A technology of diffusion coefficient and diffusion device, which is used in the field of devices for measuring the diffusion coefficient of oxygen in concrete with different saturation under continuous tension and compression, can solve the problem of neglecting oxygen diffusion, and achieve high application value, simple measurement, and accurate and reliable data. Effect

Active Publication Date: 2020-08-07
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The existing research methods are mainly aimed at the measurement of water and oxygen in concrete, ignoring the diffusion of oxygen in concrete under load.

Method used

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  • Device for measuring oxygen diffusion coefficients in concrete with different saturations under action of continuous tension and compression
  • Device for measuring oxygen diffusion coefficients in concrete with different saturations under action of continuous tension and compression
  • Device for measuring oxygen diffusion coefficients in concrete with different saturations under action of continuous tension and compression

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Embodiment 1

[0039] Such as Figure 1-5 As shown, the device for measuring the oxygen diffusion coefficient in concrete with different saturations under continuous tension and compression, including the test piece, oxygen diffusion device and continuous tension and compression load device;

[0040] The oxygen diffusion device includes a central circular gas diffusion chamber 1 and an outer circular gas diffusion chamber 2, the central circular gas diffusion chamber 1 and the outer circular gas diffusion chamber 2 are in a concentric structure, the central circular gas diffusion chamber 1 and the outer circular On both sides of the gas diffusion chamber 2, three external thin tubes with valves are respectively arranged. The external thin tubes are the air inlet pipe 3, the pressure detection pipe 4 and the concentration sensor detection pipe 5 from top to bottom. The inlet pipe 3 of the circular gas diffusion chamber 1 and the outer circular gas diffusion chamber 2 is connected to the gas s...

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Abstract

The invention relates to the field of concrete oxygen diffusion coefficient determination devices, in particular to a device for measuring the oxygen diffusion coefficients in concrete with differentsaturations under the action of continuous tension and compression. The device comprises a to-be-tested piece, an oxygen diffusion device and a continuous tension and compression load device, whereinthe oxygen diffusion device is formed by connecting a central circle gas diffusion chamber and an outer circle gas diffusion chamber in a concentric circle structure, and the oxygen diffusion device is tightly attached to the to-be-tested piece through a rubber pad to form a closed space, and the continuous tension and compression load device is arranged in the vertical direction of the gas diffusion surface, so that the oxygen diffusion coefficient at any position of the test piece can be detected, and the detected oxygen diffusion coefficient is the oxygen diffusion coefficient under the continuous load and is closer to the actual engineering operation.

Description

technical field [0001] The invention relates to the field of concrete oxygen diffusion coefficient measuring devices, in particular to a device for measuring oxygen diffusion coefficients in concrete with different saturations under continuous tension and compression. Background technique [0002] One of the necessary conditions for the occurrence and development of steel bar corrosion is sufficient oxygen on the steel bar surface. In the natural environment, the driving force in the process of transporting oxygen from the concrete surface to the internal reinforcement should only be the concentration gradient, and the diffusion effect occurs instead of the penetration effect. Oxygen diffusion is closely related to the internal pores of cement-based materials. Cement-based materials are porous composite materials with different pore sizes composed of aggregates and cement hydration products. The pore structure is random, irregular and complex, which is the key factor affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N13/04
CPCG01N15/0826G01N13/04G01N2015/0015G01N2013/003Y02E30/30
Inventor 徐俊蔡成功万连建吴庆彭琛周昊曹石赵威韩文娟
Owner JIANGSU UNIV OF SCI & TECH
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