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Application of fluorine-containing polymer in preparation of transparent permafrost, prepared transparent permafrost, and production method

A production method and polymer technology, applied in transparent frozen soil and production, the application field of fluorine-containing polymers in the preparation of transparent frozen soil, can solve the problems that saturated transparent frozen soil samples cannot be prepared, and achieve easy access and The effects of blending, good similarity, and a wide range of sources

Inactive Publication Date: 2014-07-16
HUNAN CITY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the saturated transparent frozen soil sample cannot be prepared by using the existing solid particles for preparing transparent soil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An application of a fluorine-containing polymer in the preparation of transparent frozen soil. When preparing transparent soil, it is used as a transparent solid material. The fluorine-containing polymer is a particle with a particle size of 0.25 mm to 2.0 mm, and the particles are irregular in shape. Teflon AF 1600 produced for DuPont, USA, with a refractive index of 1.31 and a density of 2.1g / ㎝ 3 ~2.3g / ㎝ 3 .

[0047] A kind of transparent frozen soil, which is prepared by fluorine-containing polymer, granular ice and colorless pore liquid through the steps of material preparation, mixing, vacuuming, and freezing. The dosage of the fluorine-containing polymer, granular ice and colorless pore liquid Calculated through the test conditions and sample size; the colorless pore liquid is water, and the fluoropolymer is particles with a particle size of 0.25 mm to 2.0 mm, and the particles are irregular in shape. AF 1600, refractive index 1.31, density 2.1g / ㎝ 3 ~2.3g / ㎝ 3 ...

Embodiment 2

[0064] In step ⑴, select density 2.1g / ㎝ 3 fluorine-containing polymer particles, 20% for fluorine-containing polymer particles 0.25㎜≤particle size<0.5㎜, 30% for 0.5㎜≤particle size<1.0㎜, 30% for 1.0㎜≤particle size<1.5㎜ , 1.5㎜≤particle size≤2.0㎜ is 20%, by weight, the total is 100%, mix them evenly;

[0065] In step (2), control the compactness to 30%;

[0066] The physical characteristics of the transparent permafrost made in this embodiment are: density 1.82g / ㎝ 3 , severe 18kN / m 3 , compactness 30%; mechanical properties: internal friction angle 30°, elastic modulus 10MPa, Poisson's ratio 0.35.

[0067] The rest are the same as embodiment 1.

Embodiment 3

[0069] The application of a fluorine-containing polymer in the preparation of transparent frozen soil. When preparing transparent soil, it is used as a transparent solid material. The fluorine-containing polymer is particles with a particle size of ≤0.074 mm, and the particles are irregular in shape. Teflon AF 1600 produced by DuPont, with a refractive index of 1.31 and a density of 2.1g / ㎝ 3 ~2.3g / ㎝ 3 .

[0070] A transparent permafrost, which is prepared from fluorine-containing polymer, granular ice and colorless pore liquid through the steps of material preparation, mixing, vacuuming, consolidation, and freezing. The fluorine-containing polymer, granular ice and colorless pore liquid The amount of pore liquid is calculated according to the test conditions and the size of the sample; the colorless pore liquid is water, and the fluorine-containing polymer is particles with a particle size of ≤0.074mm, and the particles are irregular in shape, produced by DuPont Company of th...

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Abstract

The invention discloses a fluorine-containing polymer which serves as a transparent solid material in preparation of transparent permafrost. The fluorine-containing polymer is particles which have the particle sizes of 0.25 to 2.0 mm (or less than or equal to 0.074 mm); the particles are irregular shapes, are Teflon AF1600 produced by DuPont Company of America, and have the refractive index of 1.31 and the density of 2.1 to 2.3 g / cm<3>. The preparation method for the transparent permafrost comprises the following steps: preparing and mixing the fluorine-containing polymer particles, ice particles and colorless pore fluid; vacuumizing, (solidifying), and freezing. The physical properties and the mechanical properties of the prepared transparent permafrost can meet the simulated saturated frozen sand (or frozen clay); the transparent permafrost is high in transparency and low in cost, does not have toxicity and harm, has high similarity with the properties of a natural permafrost body, can widely replace the natural permafrost, and is used for simulating complex geological conditions, and is effectively used for a model test in geotechnical engineering.

Description

technical field [0001] The present invention relates to a kind of transparent frozen soil and its production method, in particular to a transparent frozen soil and its production method, in particular to the application of a fluorine-containing polymer in preparing transparent frozen soil and the prepared transparent frozen soil and its production method. Background technique [0002] In the model test of geotechnical engineering, it is of great significance to explore the nature of geotechnical engineering problems by studying the law and mechanism of soil internal deformation. In particular, the area of ​​permafrost, seasonally frozen soil and short-term frozen soil areas on the earth accounts for about 50% of the land area, of which the distribution area of ​​permafrost is 35 million ㎞ 2 , accounting for about 25% of the land area. However, the engineering characteristics of frozen soil are quite different from those of conventional soil. Therefore, it is very important...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 孔纲强
Owner HUNAN CITY UNIV
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