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Temperature-humidity-stress-chemical coupling test platform for porous dielectric material

A technology of porous medium and test platform, which is applied in the field of rheological mechanics test and research, can solve the problems of inability to simulate chemical substances on the gradual corrosion process of materials and the influence of long-term mechanical properties of materials.

Inactive Publication Date: 2015-06-17
HOHAI UNIV
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  • Claims
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Problems solved by technology

Therefore, it is impossible to simulate the gradual erosion process of chemical substances on materials, and it is also impossible to simulate the influence of polluted atmospheric environment on the long-term mechanical properties of materials.

Method used

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  • Temperature-humidity-stress-chemical coupling test platform for porous dielectric material

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Experimental program
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Embodiment 1

[0033] [1] First, use a drilling machine to extract a core from a large piece of sandstone rock, cut the core, and perform end grinding treatment to make a standard cylindrical specimen 1;

[0034] [2] Install the test piece 1 on the rigid lower indenter 7, install the circumferential displacement extensometer 3 in the middle of the test piece 1, and then install the rigid upper indenter 4 and the LVDT displacement meter 2, so that the measuring rod of the LVDT displacement meter touches the The head is in contact with the axial displacement measuring head 5 of the test piece, the axial deformation of the test piece 1 is measured by the LVDT displacement meter 2, and the circumferential deformation of the test piece 1 is measured by the circumferential displacement extensometer 3;

[0035] [3] Connect the data line 16 between the relative humidity meter 12, the thermometer 13, the infrared absorption gas analyzer 14, the extensometer 3, the LVDT displacement meter 2, the oil pr...

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Abstract

The invention discloses a temperature-humidity-stress-chemical coupling test platform for porous dielectric material. The test platform comprises a closed container, a load-bearing frame, a mechanical test system, an environment simulating system and a data acquiring system; the load-bearing structure is fixedly arranged at upper and lower two ends of the closed container; the mechanical test system comprises a loading device and a power device; the loading device is arranged in the enclosed container; the environment simulating system comprises a temperature simulating device and a humidity simulating device; the environment simulating system further comprises a chemical simulating device; the chemical simulating device comprises a chemical gas generator and a gas pipeline; the outlet of the gas pipeline is connected in the closed container; and a gas analyzer used for monitoring gas component and concentration is further arranged in the closed container. By adopting the test platform provided by the invention, the temperature and humidity changes in atmosphere environment and the influence of gas containing chemical substance to the long-term mechanical property of material can be simulated; and the test platform is feasible for mechanical multi-field coupling research on materials.

Description

technical field [0001] The invention relates to a test platform for studying the multi-field coupling effect of porous media materials such as rocks and concrete, in particular, it can carry out research on the periodic temperature and humidity changes of porous media materials and different chemical pollutants in the air (simulating polluted atmosphere) Rheological mechanics test research under environmental conditions such as chemical erosion of materials). Background technique [0002] Porous media materials such as rock and concrete in actual engineering are in a complex physical and chemical environment, and are affected by multiple fields such as temperature, humidity, and chemistry. Changes in humidity will cause deformation of the material. The main mechanism is that humidity will change the tension and adsorption force in the capillary pores of the material, thereby causing changes in the internal stress of the material. The influence of temperature on the mechanic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/12
Inventor 徐卫亚王如宾苏昆张久长孟庆祥王伟顾锦键张强
Owner HOHAI UNIV
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