CN109655322A - A kind of preparation method of transparent clay - Google Patents
A kind of preparation method of transparent clay Download PDFInfo
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- CN109655322A CN109655322A CN201811509618.5A CN201811509618A CN109655322A CN 109655322 A CN109655322 A CN 109655322A CN 201811509618 A CN201811509618 A CN 201811509618A CN 109655322 A CN109655322 A CN 109655322A
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- transparent
- clay
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- white oil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- General Physics & Mathematics (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention provides a kind of preparation methods of transparent clay, belong to building material technical field, provide a kind of transparent clay of physico mechanical characteristic that can simulate clay.The preparation method, by the way that white oil and solvent naphtha according in gap fluid of the certain volume than the certain refractive index being mixed to get, to be added the gas-phase silica powder of certain mass score, the transparent soil of muddy are made；Then the bubble in the transparent soil of muddy is removed under vacuum condition and the alternate situation of normal pressure；It is consolidated finally by pressurization, obtains the transparent clay of required transparency.Transparent clay obtained by the preparation method of transparent clay through the invention, production method is easy, and bubble is few, has excellent cohesive strength and transparency, so as to the deformation characteristic for studying cohesive soil stratum in geotechnical engineering field.It moreover, the transparent clay stability is good, can be used for simulating natural clay, there is preferably promotional value.
Description
Technical field
The present invention relates to building material technical fields, and in particular to a kind of preparation method of transparent clay.
Background technique
Soil deformation measurement is one of the important foundation of soil mechanics research.Traditional indoor model test measurement passes through soil
Monitoring information that is that the internal inbuilt sensor in portion obtains part and being influenced by size sensor and soil boundary region
Deformation.In addition to this, there are no methods to carry out zero correction to sensor before measurement strain for sensor, this is but also pass
The deformation of deformation and the actual soil body that sensor measurement obtains has certain error.In order to realize to soil body internal deformation, seepage flow
Deng visual inspection, develop transparent native experimental technique.
Transparent soil is mixed by transparent solid material and gap liquid stream body.Gap liquid is needed by two different
Oil composition, two kinds of oily refractive index need the refractive index for being greater than solid material, and one is less than the refractive index of solid material,
It can configure in this way and carry out the refractive index of mixed solution and be substantially equal to the refractive index of solid material.Tracer is added in transparent soil
Particle, and a light wall is formed with laser irradiation, trace particle can be with reflection light, and transparent soil can make light directly saturating
It crosses, is taken pictures with CCD industrial camera to this light wall, the missing subreflexive light of grain can form a series of on photo
Hot spot can both analyze the movement of missing particle in conjunction with PIV Particle Image Velocimetry, to obtain the position of the soil body
Move field.
The analogue technique of existing transparent soil is mostly quartz sand simulation topsoil, the adhesive aggregation of the transparent soil configured
Power is almost nil, can not simulate the physico mechanical characteristic of clay.For the cohesiveness for improving transparent soil, someone grinds solid particle
Carefully, reach the particle size of natural tack particle, but it is demonstrated experimentally that with quartz sand particle diameter reduction, transparent soil
Transparency also decreases or even opaque.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of transparent clay, the transparent clay made by this method, together
When have good cohesive strength and transparency, so as to using the clay under transparent clay simulation native state of the invention,
It can be used for the visual research of soil deformation under clay operating condition, provide a kind of feasible scheme of transparent soil configuration for researcher；
Manufacture craft is simple, and conventional transparent native tools can be completed；Used gas-phase silica powder, solvent naphtha and mineral
Oil is prepared, and obtained soil body stability is preferable, and transparency is high, can be used for simulating natural clay.
To achieve the goals above, the technical scheme is that
A kind of preparation method of transparent clay, the preparation method include the following steps:
Step 1: preparation gap fluid: white oil being mixed at 25 DEG C or so according to certain volume ratio with solvent naphtha, is obtained
With the consistent gap fluid of gas-phase silica powder refractive index；
Step 2: preparing transparent native mud: gas-phase silica powder is added to gap fluid with mass percent 5%
In, it is stirring while adding, so that white carbon black powder is thoroughly dispersed among interstitial fluids, form transparent native mud；
Step 3: vacuum degassing is steeped: the transparent native mud prepared in the step 2 is placed under vacuum environment
It being evacuated, every pumping 30 minutes is taken out standing 30 minutes, is recycled with this, until bubble collapse in the transparent native mud,
The transparent native mud of not bubbles is made；
Step 4: the transparent native mud of the not bubbles in the step 3 is carried out pressurization consolidation to get to after consolidating
Transparent clay.
Compared with prior art, the invention has the advantages that and the utility model has the advantages that
The transparent soil that the present invention is prepared is transparent clay, and preparing mostly in the prior art is transparent sand, is compared
Under, the preparation of sand is easily more than the preparation of clay, and bubble is seldom.The preparation key point of clay is to remove
Bubble and the intensity for improving transparent clay.Transparent clay prepared by the present invention is provided simultaneously with excellent cohesive strength and transparency,
So as to using the deformation characteristic of cohesive soil stratum in transparent clay research geotechnical engineering field of the invention.And make work
Skill is simple, can be completed using the tools of convention transparent soil；Using gas-phase silica powder and white oil, solvent naphtha mixing
Obtained cementing transparent clay stability is preferable, and the defect that conventional transparent soil can be overcome inviscid can be used for simulating natural
Clay.Further, the refractive index of the gap fluid is consistent with gas-phase silica powder refractive index.Pass through preparation and gas phase
The consistent gap fluid of white carbon black powder refractive index can prepare the preferably transparent clay of transparency.
Further, the white oil is 15# mineral oil.That is slab oil, it is after special deep refining
Mineral oil, the mixture of refining liquid hydrocarbon obtained by petroleum, the cycloalkane and alkane mixture being predominantly saturated, crude oil warp
Normal pressure and vacuum fractionation, solvent extraction and dewaxing, hydrofinishing and obtain, white colourless, tasteless, chemical inertness, light stability energy
It is good, it basic composition is saturated hydrocarbon structure, the substances such as aromatic hydrocarbon, nitrogenous, oxygen, sulphur are similar to zero.
Further, the solvent naphtha can be EI solvent naphtha, when being mixed with white oil, the volume ratio of white oil and solvent naphtha
For 1:5.It being mixed using this volume ratio, the refractive index that preparation obtains solution is substantially equal to the refractive index of gas-phase silica powder,
Meet the requirement of transparent clay.
Further, the solvent naphtha can be Isopars Isopar M, when being mixed with white oil, white oil with it is molten
The volume ratio of agent oil is 1:7.It is mixed using this volume ratio, the refractive index that preparation obtains solution is substantially equal to gas-phase silica
The refractive index of powder meets the requirement of transparent clay.
Further, the pressurization consolidation style is distributed circuit, and the size of required pressurization is with required transparent clay
Intensity variation and change.
Detailed description of the invention
Fig. 1 is the sample for the transparent clay being prepared in the embodiment of the present invention one and two.
Specific embodiment
Make further specifically below in conjunction with preparation method of the drawings and specific embodiments to transparent clay of the invention
It is bright.According to following explanation, advantages and features of the invention will be become apparent from.
Embodiment one
A kind of preparation method of transparent clay, includes the following steps:
Step 1: preparation gap fluid: white oil 1.7L and E1 solvent naphtha 8.5L are added to the container stirring at 25 DEG C or so
Uniformly, refractive index and the consistent gap backed up for flow of gas-phase silica powder refractive index are configured to；
Step 2: preparing transparent native mud: weighing 446.42g gas-phase silica powder, pour into the gap fluid prepared
Container in, be slowly stirred, it is stirring while adding so that white carbon black powder is thoroughly dispersed among the fluid of gap, form muddy
Transparent soil；
Step 3: vacuum degassing is steeped: the transparent soil of the muddy prepared in the step 2 is placed in vacuum environment
Under be evacuated, every pumping 30 minutes is taken out standing 30 minutes, is recycled with this, until bubble collapse in transparent native mud, system
Obtain the transparent native mud of not bubbles；
Step 4: the transparent native mud of the not bubbles in step 3 is carried out pressurization consolidation draining (oil) to get to such as
Transparent clay after consolidation shown in FIG. 1.The transparent clay mechanical strength depends on time and the consolidation pressure of pressurization consolidation,
It does not drain shear strength in 10kPa between 80kPa, and infiltration coefficient is 10-7To 10-8M/d, compression modulus is in 0.5MPa
To between 2MPa, void ratio is between 0.7 to 0.9, therefore, can be used for simulating soft clay.
Embodiment two
The preparation method reference implementation example one of transparent clay, difference are white oil 1L, E1 solvent naphtha 7L, gas-phase silica
Powder 400g, the transparent clay prepared needed for finally obtaining, the feature of obtained transparent clay please refer to Fig. 1.
It is matched according to test, when using gas-phase silica powder as solid phase, when using EI solvent naphtha and white oil mixed configuration
When the fluid of gap, when the volume ratio of white oil and solvent naphtha is close to 1:5, the refractive index and solid phase of obtained mixed liquor are close,
The transparent clay transparency prepared at this time is best；It is flowed when using Isopars Isopar M and white oil mixed configuration gap
When body, the volume ratio of white oil and solvent naphtha is close to 1:7, and the transparent clay transparency prepared at this time is best.In view of temperature pair
The influence of mixture refractive index, the volume ratio of solution mixing can slightly have near above-mentioned volume ratio to be fluctuated.Such as white oil and solvent
When the volume ratio of oil is 1:7~1:5, the transparent soil of obtained transparent clay preferably, can be used in simulating clay.
For the present invention during preparing transparent clay, the mass percent of gas-phase silica powder should be 5% or so, gas
The excessive elimination for being unfavorable for the transparent air in soil bubble of muddy in step 3 of the mass percent of phase white carbon black powder, influences final
The transparency of transparent clay；And it is too small if draining (oil) amount in step 4 can be very big, waste material.Vacuum in step 3
Degree is the bigger the better, and does not need a specific value.It is vacuumized in step 3 and standing is in order in vacuum condition and normal pressure friendship
It is preferably removed in the case where replacing except the bubble in the transparent soil of muddy, improves the transparency of prepared transparent clay.
In conclusion the present invention is by by white oil and solvent naphtha is mixed to get according to certain volume ratio and gas-phase silica
In the consistent gap fluid of powder refractive index, the gas-phase silica powder of certain mass score is added, the transparent soil of muddy is made；
Then the bubble in the transparent soil of muddy is removed under vacuum condition and the alternate situation of normal pressure；It consolidates, obtains finally by pressurization
To the transparent clay of required transparency.Transparent clay obtained by the preparation method of transparent clay through the invention, production side
Method is easy, and bubble is few, has excellent cohesive strength and transparency, so as to for studying in geotechnical engineering field clay
The deformation characteristic of layer.It moreover, the transparent clay stability is good, can be used for simulating natural clay, there is preferably promotion price
Value.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention.Ability
Any change, the modification that the technical staff in domain does according to the disclosure above content, belong to scope of protection of the claims.
Claims (5)
1. a kind of preparation method of transparent clay, which comprises the steps of:
Step 1: preparation gap fluid: white oil being mixed at 25 DEG C or so according to certain volume ratio with solvent naphtha, is obtained and gas phase
The consistent gap fluid of white carbon black powder refractive index；
Step 2: preparing transparent native mud: gas-phase silica powder being added in the fluid of gap with mass percent 5%, side
Edged stirring forms transparent native mud so that white carbon black powder is thoroughly dispersed among interstitial fluids；
Step 3: vacuum degassing is steeped: the transparent native mud prepared in the step 2 being placed under vacuum environment and is carried out
Pumping, every pumping 30 minutes, takes out standing 30 minutes, is recycled with this, until bubble collapse in the transparent native mud, is made not
The transparent native mud of bubbles；
Step 4: the transparent native mud of the not bubbles in the step 3 is carried out pressurization consolidation to get saturating to after consolidating
Bright clay.
2. preparation method according to claim 1, which is characterized in that the white oil is 15# mineral oil.
3. preparation method according to claim 1, which is characterized in that the solvent naphtha can be EI solvent naphtha, with white oil
When mixing, the volume ratio of white oil and solvent naphtha is 1:5.
4. preparation method according to claim 1, which is characterized in that the solvent naphtha can be Isopars
Isopar M, when mixing with white oil, the volume ratio of white oil and solvent naphtha is 1:7.
5. preparation method according to claim 1, which is characterized in that the pressurization consolidation style is distributed circuit, institute
The size that need to be pressurizeed changes with the variation of the intensity of required transparent clay.
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| CN201811509618.5A CN109655322A (en) | 2018-12-11 | 2018-12-11 | A kind of preparation method of transparent clay |
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| CN201811509618.5A CN109655322A (en) | 2018-12-11 | 2018-12-11 | A kind of preparation method of transparent clay |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650027A (en) * | 2020-05-20 | 2020-09-11 | 重庆大学 | Preparation method of transparent soil-rock mixture |
| CN112924352A (en) * | 2021-01-14 | 2021-06-08 | 河海大学 | Visual submerged corrosion test device and method and transparent soil preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969099A (en) * | 2014-04-30 | 2014-08-06 | 河海大学 | Preparation method for artificially synthesized transparent soil material |
| US9810608B2 (en) * | 2014-04-30 | 2017-11-07 | Hohai University | Transparent frozen soil and preparation method and application thereof |
| CN107328623A (en) * | 2017-07-10 | 2017-11-07 | 成都理工大学 | A kind of cementing transparent soil and preparation method thereof |
-
2018
- 2018-12-11 CN CN201811509618.5A patent/CN109655322A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103969099A (en) * | 2014-04-30 | 2014-08-06 | 河海大学 | Preparation method for artificially synthesized transparent soil material |
| US9810608B2 (en) * | 2014-04-30 | 2017-11-07 | Hohai University | Transparent frozen soil and preparation method and application thereof |
| CN107328623A (en) * | 2017-07-10 | 2017-11-07 | 成都理工大学 | A kind of cementing transparent soil and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650027A (en) * | 2020-05-20 | 2020-09-11 | 重庆大学 | Preparation method of transparent soil-rock mixture |
| CN112924352A (en) * | 2021-01-14 | 2021-06-08 | 河海大学 | Visual submerged corrosion test device and method and transparent soil preparation method |
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Application publication date: 20190419 |
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