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A kind of modified similar material and preparation method thereof

A technology of similar materials and modification, applied in the field of similar materials of geomechanical models and their preparation, can solve the problems of application, inconvenient operation, and infrequent use.

Inactive Publication Date: 2021-10-01
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there are many kinds of similar materials used in similar tests, such as paraffin wax, pure gypsum, gypsum diatomite mixed simulation materials, cement pumice mixture, etc. Although these similar materials have played a certain role in specific tests, but, There are still many disadvantages, such as paraffin, which requires a certain temperature to be applied when making test pieces, and is inconvenient to operate, so it is not commonly used; the modulus of elasticity of gypsum can be adjusted in a small range, and the ratio of ultimate compressive strength to tensile strength It is too small, so its application range is limited; similar materials made of gypsum, diatomaceous earth and water will shrink in volume as the amount of diatomite added increases.

Method used

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  • A kind of modified similar material and preparation method thereof
  • A kind of modified similar material and preparation method thereof
  • A kind of modified similar material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In the three-necked flask that stirrer is equipped with, add 500g formula Ia compound (AR, purchased from Dow-Corning Company) and 60g formula Ib (AR, purchased from Liaoning Province organosilicon resin factory) compound, inert gas protection, start stirring device And raise the temperature to 110°C. After the two are mixed evenly, add 3g of titanium tetrachloride-triethylaluminum, control the rotation speed at 600r / min, stir and react for 10 hours, stop stirring, and obtain R as a polymer of methyl Object Ic.

[0040]

[0041] Ia

[0042] +

[0043]

[0044] Ib

[0045] ↓

[0046]

[0047] IC

[0048] where M w 1.22×10 4 ,M n 4.52×10 3 , The molecular weight distribution index is 2.6.

Embodiment 2

[0050] First, mix 100 parts of barite powder with a particle size of 200 mesh and 0.015 parts of polymer of formula Ic evenly, then dry at 90°C for 3 hours to remove water, take it out and cool to room temperature; add 4 parts of No. 32 hydraulic machine oil to the dried Mix the barite powder and the polymer of formula Ic evenly, and then crush the mixed material until its particle size is ≤1mm; add 1.8 parts of cement marked 525 to the barite powder, the polymer of formula Ic and No. 32 hydraulic machine oil In the mixture, continue to mix evenly; finally add 2 parts of water to the above mixture, and mix evenly. The material has a compressive strength of 0.76 MPa and a modulus of deformation of 12.1 MPa.

Embodiment 3

[0052] First mix 100 parts of barite powder with a particle size of 200 mesh and 0.013 parts of polymer of formula Ic evenly, then dry at 90°C for 3 hours to remove water, take it out and cool to room temperature; add 4 parts of No. 32 hydraulic machine oil to the dried Mix the barite powder and the polymer mixture of formula Ic evenly, and then crush the mixed material to a particle size ≤ 1mm; add 1 part of cement marked 425 to the barite powder, polymer formula Ic and No. 32 hydraulic press In the oil mixture, continue to mix well; finally add 2.5 parts of water to the above mixture, and mix well. The material has a compressive strength of 0.98MPa and a modulus of deformation of 12.8MPa.

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Abstract

The invention relates to a modified similar material and a preparation method thereof. The modified material includes barite powder, cement, water, No. 32 hydraulic machine oil and the unique formula I polymer of the present invention. The modified similar material provided by the invention can simulate various rock masses, and the raw materials used have wide sources, no toxic and side effects, simple preparation process, low energy consumption, high preparation efficiency and low cost.

Description

technical field [0001] The invention relates to a similar material and a preparation method thereof, in particular to a geomechanical model similar material suitable for simulating rock masses and a preparation method thereof. Background technique [0002] The similar simulation test is a test method that uses a model instead of a prototype to conduct test research according to a certain geometric and physical relationship, and uses the research results for the prototype. It is an important scientific research method. It is to make a model similar to the prototype in the laboratory according to the similarity principle, observe the internal force parameters and their distribution laws of the model with the help of test instruments, and use the results of the research on the model to infer the possibility of the prototype. The mechanical phenomena that occur and the law of rock mass pressure distribution can solve practical problems in rock mass engineering production. This ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C08G81/00
CPCC04B28/04C08G81/00C04B24/42C04B14/368C04B22/002C04B24/00
Inventor 宋志飞秦金雷邹杰徐勇
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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