Fluid-solid coupling similar material for model test and preparation method for material

A model test, similar material technology, applied in the field of material science, can solve problems such as high temperature conditions, disintegration in water, not fluid-structure coupling similarity simulation, etc., to achieve the effect of solving correlation and improving similarity simulation degree

Active Publication Date: 2012-07-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious deficiencies in the current underground engineering model tests. Most of the similar materials in the prior art only consider physical and mechanical similarities. Most of the similar materials will disintegrate in water and cannot be applied to fluid-solid coupling model tests.
For a small number of paraffin-based fluid-solid coupling materials, they only focus on solving the problem of material disintegration in water, and have high requirements on temperature conditions. Rationality meets test requirements at the same time
Therefore, past studies often do not simulate seepage under real water pressure conditions, and only use flexible loading to simulate water pressure, which cannot reflect the actual situation under the coupling effect of rock mass and water, and is not a true similar simulation of fluid-solid coupling.

Method used

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  • Fluid-solid coupling similar material for model test and preparation method for material
  • Fluid-solid coupling similar material for model test and preparation method for material
  • Fluid-solid coupling similar material for model test and preparation method for material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 Preparation of fluid-solid coupling similar materials used in model tests

[0036] The formula is: 320g of standard sand, 32g of barite powder, 32g of talcum powder, 20.8g of cement, 24g of vaseline, 16g of silicone oil, and 32g of mixing water.

[0037] The preparation steps are:

[0038] 1) Weigh standard sand, barite powder, talcum powder, cement, vaseline, silicone oil and mixing water in strict proportion;

[0039] 2) Mix sand, barite powder, talcum powder and cement four fine-grained materials and stir evenly;

[0040] 3) Add mixing water and stir fully;

[0041] 4) Add regulator silicone oil and mix well;

[0042] 5) Heating vaseline to 50°C to melt it into a liquid state;

[0043] 6) Mix the liquid petroleum jelly with the material and stir well;

[0044] 7) Cool at room temperature for 10 minutes to obtain.

[0045] Related parameters of this ratio: weight 2.14g / cm 3 , compressive strength 0.61MPa, tensile strength 0.058MPa, elastic modulus 37M...

Embodiment 2

[0046] Example 2 Preparation of fluid-solid coupling similar materials used in model tests

[0047] The formula is: standard sand 320g, barite powder 32g, talc powder 32g, cement 20.8g, vaseline 24g, silicone oil 0, mixing water 24g.

[0048] The preparation steps are:

[0049] 1) Weigh standard sand, barite powder, talcum powder, cement, vaseline and mixing water in strict proportion;

[0050] 2) Mix sand, barite powder, talcum powder and cement four fine-grained materials and stir evenly;

[0051] 3) Add mixing water and stir fully;

[0052] 4) Heating vaseline to 50°C to melt it into a liquid state;

[0053] 5) Mix the liquid petroleum jelly with the material and stir well;

[0054] 6) Cool at room temperature for 10 minutes to obtain.

[0055] Related parameters of this ratio: weight 1.92g / cm 3 , compressive strength 0.44MPa, tensile strength 0.042MPa, elastic modulus 13MPa, permeability coefficient 8.61×10 -5 cm / s.

Embodiment 3

[0056] Example 3 Preparation of fluid-solid coupling similar materials used in model tests

[0057] The formula is: 320g of standard sand, 32g of barite powder, 32g of talcum powder, 40g of cement, 38.4g of vaseline, 12.8g of silicone oil, and 32g of mixing water.

[0058] The preparation steps are:

[0059]1) Weigh standard sand, barite powder, talcum powder, cement, vaseline, silicone oil and mixing water in strict proportion;

[0060] 2) Mix sand, barite powder, talcum powder and cement four fine-grained materials and stir evenly;

[0061] 3) Add mixing water and stir fully;

[0062] 4) Add regulator silicone oil and mix well;

[0063] 5) Heating vaseline to 50°C to melt it into a liquid state;

[0064] 6) Mix the liquid petroleum jelly with the material and stir well;

[0065] 7) Cool at room temperature for 10 minutes to obtain.

[0066] Related parameters of this ratio: weight 2.12g / cm 3 , compressive strength 0.92MPa, tensile strength 0.090MPa, elastic modulus 11...

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Abstract

The invention discloses a fluid-solid coupling similar material for a model test. The material consists of the following raw materials in part by weight: 1 part of standard sand, 0.05 to 0.15 part of barite powder, 0.05 to 0.15 part of talcpowder, 0.05 to 0.125 part of cement, 0.04 to 0.12 part of vaseline, 0 to 0.15 part of silicone oil and 0.05 to 0.1 part of mixing water. Hydraulic cement and non-hydrophilic vaseline are taken as cementing agents in the material, so that the problem that the similar material is softened and disintegrated when meeting water is solved, and the strength and elastic modulus of the material can be adjusted in a wide range; the silicone oil is taken as an adjuster, so that the water physical indexes such as permeability and the like of the material can be adjusted under the condition that the mechanical indexes of the material are basically not influenced, and the physical and mechanical properties and water physical properties of the material can meet the test requirement; and compared with previous research, the invention has the advantages that: the intercoupling effect of a rock body and water is truly simulated, and the obtained geomechanical similar model test research result is more accurate.

Description

technical field [0001] The invention relates to a fluid-solid coupling similar material used for model tests and a preparation method thereof, belonging to the technical field of material science. Background technique [0002] At present, many scholars use geomechanical model tests to study the optimization of underground engineering design and construction methods, and explore the mechanical laws of the construction process. However, there are obvious deficiencies in the current underground engineering model tests. Most of the similar materials in the prior art only consider physical and mechanical similarities. Most of the similar materials will disintegrate in water and cannot be applied to fluid-solid coupling model tests. For a small number of paraffin-based fluid-solid coupling materials, they only focus on solving the problem of material disintegration in water, and have high requirements on temperature conditions. Rationality meets the experimental requirements at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 李利平周毅张骞王庆瀚林春金周宗青石少帅郭明王凯
Owner SHANDONG UNIV
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