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Method for preparing transparent clay

A technology of transparent soil and clay, applied in the field of building materials, can solve the problems of opacity, inability to simulate the physical and mechanical properties of clay, and reduced transparency of transparent soil, and achieve the effects of excellent cohesion, excellent transparency and simple production process.

Inactive Publication Date: 2019-04-19
SHANGHAI CONSTRUCTION GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing simulation techniques for transparent soil use quartz sand to simulate natural sandy soil. The cohesion of the transparent soil obtained after configuration is almost zero, and the physical and mechanical properties of clay cannot be simulated.
In order to improve the cohesiveness of transparent soil, some people grind the solid particles finely to reach the particle size of natural cohesive particles, but experiments have proved that with the decrease of the diameter of quartz sand particles, the transparency of transparent soil also decreases, even opaque.

Method used

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  • Method for preparing transparent clay

Examples

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Effect test

Embodiment 1

[0021] A preparation method of transparent clay, comprising the steps of:

[0022] Step 1. Preparation of interstitial fluid: add 1.7L of white oil and 8.5L of E1 solvent oil into a container at about 25°C and stir evenly, and prepare interstitial fluid with the same refractive index as the gas-phase silica powder for later use;

[0023] Step 2. Prepare transparent soil slurry: Weigh 446.42g of fumed silica powder, pour it into the prepared interstitial fluid container, stir slowly, and stir while adding, so that the silica powder is completely dispersed in the interstitial fluid, Form muddy transparent soil;

[0024] Step 3, vacuum degassing: place the muddy transparent soil prepared in the step 2 in a vacuum environment for pumping, every 30 minutes of pumping, take it out and let it stand for 30 minutes, and circulate it until the transparent soil mud The air bubbles in the medium disappeared, and the transparent soil mud without air bubbles was obtained;

[0025] Step 4,...

Embodiment 2

[0027] The preparation method of transparent clay refers to Example 1, the difference is that white oil 1L, E1 solvent naphtha 7L, fumed silica powder 400g, finally obtain the required transparent clay, the characteristics of the prepared transparent clay please refer to figure 1 .

[0028] According to the test ratio, when the gas phase silica powder is used as the solid phase, when the interstitial fluid is mixed with EI solvent oil and white oil, when the volume ratio of white oil and solvent oil is close to 1:5, the obtained mixed liquid The refractive index of the solid phase is close to that of the solid phase, and the transparent clay prepared at this time has the best transparency; when the isoparaffin solvent Isopar M is mixed with white oil to configure the interstitial fluid, the volume ratio of white oil to solvent oil is close to 1:7, which means that The transparency of the transparent clay prepared at this time is the best. Considering the influence of temperat...

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Abstract

The invention provides a method for preparing transparent clay, belongs to the technical field of a building material and can simulate physico-mechanical properties of the clay. The method is characterized in that the void fluid having a certain refractive index is obtained by mixing the white oil and the solvent oil according to a certain volume ratio, and a certain mass fraction of the vapor white carbon black powder is added to form slurry-like transparent soil; the alternating condition of the vacuum condition and the normal pressure, bubbles in the slurry-like transparent soil are removed; lastly, through pressured consolidation, the transparent clay having desired transparency is obtained. The method is advantaged in that the obtained transparent clay is simple and convenient to prepare, has fewer bubbles and has excellent cohesion and transparency, the clay can be used to study deformation characteristics of clay formations in the geotechnical engineering field, moreover, the transparent clay has good stability, can be used for simulating the natural clay and has good promotion value.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a preparation method of transparent clay. Background technique [0002] Soil deformation measurement is one of the important foundations of soil mechanics research. The traditional indoor model test measurement obtains local monitoring information that is affected by the size of the sensor through sensors embedded in the soil, as well as the deformation of the soil boundary area. In addition, the sensor has no way to reset the sensor to zero before measuring the strain, which also causes a certain error between the deformation measured by the sensor and the actual deformation of the soil. In order to realize the visual observation of the internal deformation and seepage of the soil, the transparent soil experiment technology was developed. [0003] Transparent soil is a mixture of transparent solid material and interstitial fluid. The interstitial liquid needs to be...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 孙廉威方宇翔梁荣柱吴小建康成杨松
Owner SHANGHAI CONSTRUCTION GROUP
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