CN110194611A - Silty analog material and preparation method thereof - Google Patents
Silty analog material and preparation method thereof Download PDFInfo
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- CN110194611A CN110194611A CN201910578171.5A CN201910578171A CN110194611A CN 110194611 A CN110194611 A CN 110194611A CN 201910578171 A CN201910578171 A CN 201910578171A CN 110194611 A CN110194611 A CN 110194611A
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- gypsum
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/22—Natural resins, e.g. rosin
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/54—Substitutes for natural stone, artistic materials or the like
- C04B2111/542—Artificial natural stone
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of silty analog materials and preparation method thereof, silty analog material is formed according to following mass fraction: 20~80 parts of gypsum, 20~80 parts of organically modified montmorillonite clay powder, 0.3~3.6 part of nano aluminium oxide, it is saturated 10~21 parts of alcohol rosin solution.Silty analog material of the invention, high with silty similarity, mechanics parameter adjusting range is wide, has good plasticity and uniformity, the raw material sources of use are wide, price is low, and preparation method is simple.
Description
Technical field
The invention belongs to geomechanical model testing technology field, it is related to a kind of silty analog material and its preparation
Method.
Background technique
Silty is a kind of general soft rock distributed more widely in south China, the spy for having drying shrinkage bulking, being easy to weathering
Property.Area is mainly subtropical monsoon climate in south China, temperature round the clock, seasonal variations it is significant, it is rainy in spring and summer
The characteristics of hot same period, temperature is high, humidity is big.When this area carries out the engineerings such as slope excavating, underground mining, underground chamber excavation,
The silty excavated under free face is influenced vulnerable to environment epidemic disaster, is led to its strength retrogression and is generated large deformation, causes rock
The unstable failure of body, endangers engineering safety.Due to silty drying shrinkage bulking, it is easy to the characteristic of weathering, in frequent rainfall
And when temperature significant changes, the engineering rock mass mechanical property susceptible of deep rock containing silty and generate large change,
Influence stability of slope and safety.It is contracted by large-scale three dimensional physical experiments to deep rock engineering problem in Practical Project
Ruler processing, is really rendered to laboratory test for field engineering condition, can more easily set influence factor, more accurate mould
Quasi- digging process and its influence more intuitively disclose deformation characteristics, mechanical characteristics and the stability change rule of deep rock engineering
Rule.In addition, opposite building-site is tested, physical experiments also have the repeatable research of influence factor, observe intuitive, research week
The advantages that phase is short, at low cost and highly-safe.
Develop meet model investigation purpose analog material be large-scale three dimensional physical experiments basis and before
It mentions.Domestic and foreign scholars developed the analog material of all multiple types in recent years, such as MIB analog material, NIOS analog material, limestone
The phases such as soft rock of cementing (IBSCM) analog material of analog material, iron crystal sand, rock salt analog material, low-intensity and low elastic modulus
Like material.
The rock analog material developed in the past mainly using cementing matter chemical reaction generate have cohesive force colloid come
Regulate and control the feature of analog material, but colloid tool brittle behavior difference and the disadvantages of be unable to control compactness.Therefore, existing similar
Material usually only have that protolith is single or a few features it is similar, with rock material it is low there are similarity the problems such as.In addition, forefathers
Research in rarely have the preparation being related to specific to silty analog material.In short, existing analog material preparation method
Cannot simultaneously it is similar with the important physical parameter of original powder Sandy Silt, mechanical property is similar, simple process, is readily formed, former material
Material obtains the features such as convenient, economical and practical.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of silty analog material, with silty similarity
Height, mechanics parameter adjusting range is wide, has good plasticity and uniformity, and the raw material sources of use are wide, price is low, preparation
Method is simple, solves problems of the prior art.
It is another object of the invention to provide a kind of preparation methods of silty analog material.
The technical scheme adopted by the invention is that a kind of silty analog material, forms according to following mass fraction:
20~80 parts of gypsum, 20~80 parts of organically modified montmorillonite clay powder, 0.3~3.6 part of nano aluminium oxide, it is saturated alcohol rosin solution 10
~21 parts.
Further, 55 parts of the gypsum, 45 parts of organically modified montmorillonite clay powder, 0.3~3.6 part of nano aluminium oxide, saturation
10~21 parts of alcohol rosin solution.
Further, 55 parts of the gypsum, 45 parts of organically modified montmorillonite clay powder, 0.3~3.6 part of nano aluminium oxide, saturation
16 parts of alcohol rosin solution.
Further, 55 parts of the gypsum, 45 parts of organically modified montmorillonite clay powder, 1.5 parts of nano aluminium oxide, saturation alcohol pine
16 parts of fragrant solution.
Further, the partial size of the gypsum is 2000~3000 mesh, and gypsum hardness is 8.5mp.
Further, the partial size of the organically modified montmorillonite clay powder is 200~400 mesh.
Further, 30 ± 10nm of partial size of the nano aluminium oxide, purity >=98.0%.
A kind of preparation method of silty analog material, specifically follows the steps below:
S1 weighs raw material: 20~80 parts of gypsum are weighed respectively according to following mass fraction, organically modified montmorillonite clay powder 20~
80 parts, 0.3~3.6 part of nano aluminium oxide, it is saturated 10~21 parts of alcohol rosin solution；
Weighed gypsum, organically modified montmorillonite clay powder, nano aluminium oxide are poured into blender simultaneously, fully mixed by S2
It is even, homogeneous solid mixture is formed, 30~50rad/s of speed of agitator stirs 5~10min；
S3 pours into saturation alcohol rosin solution into homogeneous solid mixture and quickly stirs evenly, and speed of agitator 80~
100rad/s stirs 2~5min, quickly forms uniform mixture；
S4 takes out uniform mixture, is put into mold hierarchical control compactness, and every roadbed is 0.75~0.85；
The sample mould filled is put into 17~23 DEG C, supported in the curing box of the constant temperature and humidity of 95% or more humidity by S5
24~48h is protected, demoulding is put into climatic chamber and conserves 7~8d again to get silty analog material.
Further, it in the S1, is saturated the preparation method of alcohol rosin solution: the rosin powder weighed up is put into container
It is interior, it is poured slowly into alcohol, with glass bar by the uniform velocity stirring evenly clockwise, filters out bottom residue rosin, obtains saturation alcohol pine
Fragrant solution, alcohol use the medicinal alcohol or industrial alcohol of mass concentration 90%.
Further, in the step S1, the mass ratio of raw material determines method, specifically follows the steps below:
S11 with 20~80 parts of gypsum, 20~80 parts of organically modified montmorillonite clay powder, is saturated 16 parts of alcohol rosin solution as original
Material carries out multiple groups test, prepares silty analog material, measures uniaxial compressive strength, draws gypsum and organically-modified illiteracy
De- mountain flour mass ratio obtains the stone closest to silty original sample uniaxial compressive strength to uniaxial compressive strength change curve
Cream and organically modified montmorillonite clay powder mass ratio, the i.e. optimum quality ratio of gypsum and organically modified montmorillonite clay powder；
S12 is original with the optimum quality ratio of gypsum and organically modified montmorillonite clay powder, 10~21 parts of alcohol rosin solution of saturation
Material carries out multiple groups test, prepares silty analog material, measures uniaxial compressive strength, draws saturation alcohol rosin solution
It is molten to the saturation alcohol rosin of uniaxial compressive strength change curve, acquisition closest to silty original sample uniaxial compressive strength
Liquid additional amount, i.e. saturation alcohol rosin solution optimal addn；
S13, with the optimum quality ratio of gypsum and organically modified montmorillonite clay powder, saturation alcohol rosin solution optimal addn,
0.3~3.6 part of nano aluminium oxide is raw material, carries out multiple groups test, prepares silty analog material, measures cleavage strength,
Nano oxidized aluminium content and cleavage strength change curve are drawn, the nanometer closest to silty original sample cleavage strength is obtained
Aluminium oxide additional amount to get.
The invention has the advantages that having the advantage that
1, silty analog material density range prepared by the present invention reaches 1.9g/cm3~2.5g/cm3, uniaxial anti-
Between 2.21~28.55MPa, cleavage strength meets Compressive Strength peak stress adjusting range simultaneously between 1.6~2.0MPa
Compression strength, cleavage strength, the likelihood ratio of density and silty protolith are close to 1:1；It realizes that multiple features are similar, can replace
Carry out Related Experimental Study for the protolith sample of spot sampling, avoids artificial spot sampling and sample rate, effectively save sample preparation
Cost improves speed of experiment；Convenience is provided for complicated silty protolith experimental study, previous analog material is overcome only to infuse
The shortcomings that weight single index.
2, silty analog material of the present invention improves sample uniformity using two kinds of fine aggregate mixing, using nano oxygen
Change additive containing aluminium effectively to fill hole in fine aggregate, improve pore structure, increases internal compactness；Rosin is as organic
Cementing agent bonds together particles of aggregates；Organically modified montmorillonite clay powder has hydrophily stronger, it is prone to hydration reaction,
Hydrated reaction product, which occurs, can wrap gel particle, generate cement structure, improve interfacial structure；Gypsum exists as binder
It reacts in maintenance processes with water and further increases the tension and compression strength of analog material, meet silty pressure resistance
The requirement of degree and cleavage strength.
3, raw material sources of the present invention are extensive, cheap, nontoxic, and simple process pours compaction moulding, operation side
Just, in conjunction with the compaction Control in cementation, regulator and sample making course, influence to each index of analog material is led to
The disadvantages of crossing the setting that experiment proportion realizes multi objective, overcoming colloid brittle behavior difference and be unable to control compactness.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the affecting laws of organically modified montmorillonite clay powder of the present invention and fine aggregate mass ratio to analog material density.
Fig. 2 is the influence rule that gypsum of the present invention and organically modified montmorillonite clay silty amount compare analog material uniaxial compressive strength
Rule.
Fig. 3 is the affecting laws of blender of the present invention and fine aggregate mass ratio to analog material uniaxial compressive strength.
Fig. 4 is the triaxial compressions stress-strain diagram of the embodiment of the present invention 4.
Fig. 5 is the triaxial compressions stress-strain diagram of true silty.
Fig. 6 is the affecting laws of nano aluminium oxide dosage and fine aggregate mass ratio to analog material cleavage strength.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Silty analog material of the present invention uses gypsum and organically modified montmorillonite clay powder for fine aggregate, nano oxidized
Aluminium is additive, and rosin is cementing agent, and alcohol is blender；It is formed according to following mass fraction: 20~80 parts of gypsum, You Jigai
Property 20~80 parts of montmorillonite powder, 0.3~3.6 part of nano aluminium oxide, be saturated 10~21 parts of alcohol rosin solution.
The partial size of gypsum is 2000~3000 mesh, and gypsum hardness is 8.5mp；The partial size of organically modified montmorillonite clay powder is 200
~400 mesh, 30 ± 10nm of partial size of nano aluminium oxide, purity >=98.0%.
Alcohol rosin solution is saturated as cementing agent, moulding and cementation are played to fine aggregate, form gel particle；It adopts
Strength development is fast after shaping for the mixture mixed and stirred with saturation alcohol rosin solution, and performance is stablized, and is convenient to lead at interface
It crosses alcohol bonding and plays the role of moulding.Fine aggregate is stirred by semisolid using saturation alcohol rosin solution, is easy to pouring molding,
It avoids directlying adopt in water and fine aggregate gypsum stirring casting process simultaneously, quickly reacts, generate bubble and hole not
Good situation.
The alcohol being saturated in alcohol rosin solution uses the medicinal alcohol or industrial alcohol of mass concentration 90%, as tune
And agent, rosin have stickiness, especially fast stickiness, inherently a kind of good adhesive；Rosin be soluble in alcohol formed it is full
Alcohol rosin solution and fine aggregate are saturated after mixing evenly as a kind of regulator with alcohol rosin solution, and are easy to plastotype；It is full
With alcohol rosin solution cementing strength can be adjusted according to saturation alcohol rosin solution dosage as cementing agent；With alcohol and rosin
After the volatilization of middle volatile substances, be evenly distributed on the rosin in alcohol easily crystallize with fine aggregate quickly dry after it is cementing one
It rises, plays the role of adjusting cementing strength well.
Have the advantage that rosin itself has very strong viscosity, liquid as blender using saturation alcohol rosin solution
The adhesion strength of state rosin is larger, can be used for adjusting the intensity of silty, and the dosage of rosin is added as needed；Rosin can
To be dissolved in the organic solvents such as alcohol well, forms saturation alcohol rosin solution and aggregate stirs together, all material can be mixed
It is easy to form after closing uniformly, and good cementation can be played；Alcohol have it is volatile, rosin also has the spy of volatile crystallization
Point, the sample after being made is in maintenance processes, as the volatilization of alcohol and the volatilization of rosin crystallize, reaches expected strong soon
Degree；According to the intensity requirement of silty analog material, addition saturation alcohol rosin solution can adjust Control Assay well
Cementing strength.
The effect of nano aluminium oxide: chemically angle is analyzed, due to nano aluminium oxide large specific surface area, particle table
More particulates are adsorbed in face, and are prone to hydration reaction, and hydrated reaction product, which occurs, can wrap gel particle, generate glue
Junction structure improves interfacial structure, thus be able to ascend after suitable incorporation nano aluminium oxide the compression strength of analog material with
Cleavage strength.
Nano aluminium oxide has extremely strong compatibility and adsorptivity with organic molecular compound, and the mechanism of action is: a side
Face nano aluminium oxide has good dispersibility in organic solution, effective to fill hole in fine aggregate, improve pore structure,
Compactness inside increasing；On the other hand, it is analyzed from physical angle, since the order of magnitude of nano aluminium oxide is very small,
And all there are stronger water absorbing properties, suitable incorporation nano aluminium oxide can be with the small hole in fill concrete, and changes
Good hole configurations, while as a certain amount of capillary moisture loss further mentions so that the distance between gel particle is furthered
The high compactness of analog material, shows stronger compression strength and cleavage strength.Chemically angle is analyzed, due to receiving
Rice aluminium oxide large specific surface area, particle surface adsorb more particulates, increase interionic interaction, nanoparticle with
Strong interaction between basal body interface has good gelation so that organic modified nano illiteracy takes off in organic solution；And it is easy to
Hydration reaction occurs, hydrated reaction product, which occurs, can wrap gel particle, generate cement structure, improve interfacial structure, mention
The high tensile strength of material, so being able to ascend the compression strength and splitting of analog material after suitable incorporation nano aluminium oxide
Intensity.
Organically modified montmorillonite clay powder and gypsum play a supportive role as fine aggregate, wherein organically modified montmorillonite clay powder by from
Son exchange, the metal ion between montmorillonite layer is cemented out, and is expanded montmorillonite interfloor distance, is increased the phase of high-molecular compound
Capacitive and adsorptivity make its absorption property be greatly improved, itself has very strong adsorption capacity, cation exchange property,
Therefore organically modified montmorillonite clay bisque face has more complicated absorption position and stronger adsorption activity, is easier to send out with fine particle
Raw mass settlement promotes organically modified montmorillonite clay powder and gypsum, nano aluminium oxide to be combined with each other.Gypsum is as binder simultaneously
Water hybrid reaction with saturation alcohol rosin solution and curing box, quickly solidifies after ultimately generating paste, increases material
Cohesion improves the compression strength and cleavage strength of analog material, and chemical equation is as follows:
2CaSO4·H2O+3H2O→2(CaSO4·2H2O)
A kind of preparation method of silty analog material, specifically follows the steps below:
S1 weighs 20~80 parts of gypsum according to following mass fraction respectively, and 20~80 parts of organically modified montmorillonite clay powder, nanometer
0.3~3.6 part of aluminium oxide, it is saturated 10~21 parts of alcohol rosin solution；It is saturated the preparation method of alcohol rosin solution: by what is weighed up
Rosin powder is put into container, is poured slowly into alcohol, with glass bar by the uniform velocity stirring evenly clockwise, filters out the remaining pine in bottom
Perfume (or spice) obtains saturation alcohol rosin solution.
Weighed gypsum, organically modified montmorillonite clay powder, nano aluminium oxide are poured into blender simultaneously, fully mixed by S2
It is even, form solid mixture；30~50rad/s of speed of agitator stirs 5~10min, quickly forms uniform mixing material, saves
The sample preparation time avoids stirring from discontinuity of materials occur, the defect for causing sample original material unevenly to generate；
S3 pours into saturation alcohol rosin solution into uniform mixing material and quickly stirs evenly, and speed of agitator 80~
100rad/s, uniform mixing material can quickly be formed by stirring 2~5min with faster mixing speed and shorter mixing time,
The sample preparation time is saved, avoids mixing time is too long from the quick volatilization of alcohol rosin occur, and can be to avoid time too short stirring not
Defect after the pouring molding uniformly occurred；
The uniform mixture of mix is taken out, weighs the one third of gross mass every time, is put into mold using preparatory by S4
Debug the load apparatus hierarchical control compactness that sets, every roadbed is 0.75~0.85, every layer pressure stabilizing 2 minutes, fill every time
Will be by upper second bottom shaving before sample, doctor blade is used at top after filling sample；
The sample mould filled is put into 17~23 DEG C, supported in the curing box of the constant temperature and humidity of 95% or more humidity by S5
24~48h is protected, sample is taken out and removes die screw, demoulded, be put into climatic chamber and conserve 7~8d again to get flour sand
Matter mud stone analog material.
Embodiment 1,
A kind of preparation method of silty analog material, specifically follows the steps below:
S1 weighs 20 parts of gypsum according to following mass fraction respectively, and 80 parts of organically modified montmorillonite clay powder, nano aluminium oxide
0.3 part, it is saturated 21 parts of alcohol rosin solution；
Weighed gypsum, organically modified montmorillonite clay powder, nano aluminium oxide are poured into blender simultaneously, fully mixed by S2
It is even, homogeneous solid mixture is formed, speed of agitator 50rad/s stirs 5min；
S3 pours into saturation alcohol rosin solution into homogeneous solid mixture and quickly stirs evenly, speed of agitator 80rad/
S stirs 5min, quickly forms uniform mixture；
S4 takes out uniform mixture, is put into mold hierarchical control compactness, and every roadbed is 0.75；For by phase
Like material density domination close to aleuritic texture protolith density；
The sample mould filled is put into 23 DEG C, conserved for 24 hours in the curing box of the constant temperature and humidity of humidity 95%, taken off by S5
Mould is put into climatic chamber and conserves 7d again to get silty analog material.
Embodiment 2,
A kind of preparation method of silty analog material, specifically follows the steps below:
S1 weighs 80 parts of gypsum according to following mass fraction respectively, and 20 parts of organically modified montmorillonite clay powder, nano aluminium oxide
3.6 parts, it is saturated 10 parts of alcohol rosin solution；
Weighed gypsum, organically modified montmorillonite clay powder, nano aluminium oxide are poured into blender simultaneously, fully mixed by S2
It is even, homogeneous solid mixture is formed, speed of agitator 30rad/s stirs 10min；
S3 pours into saturation alcohol rosin solution into homogeneous solid mixture and quickly stirs evenly, speed of agitator 100rad/
S stirs 2min, quickly forms uniform mixture；
S4 takes out uniform mixture, is put into mold hierarchical control compactness, and every roadbed is 0.85；
The sample mould filled is put into 17 DEG C, conserves 48h in the curing box of the constant temperature and humidity of humidity 97%, taken off by S5
Mould is put into climatic chamber and conserves 8d again to get silty analog material.
Embodiment 3,
A kind of preparation method of silty analog material, specifically follows the steps below:
S1 weighs 55 parts of gypsum according to following mass fraction respectively, and 45 parts of organically modified montmorillonite clay powder, nano aluminium oxide
1.5 parts, it is saturated 16 parts of alcohol rosin solution；
Weighed gypsum, organically modified montmorillonite clay powder, nano aluminium oxide are poured into blender simultaneously, fully mixed by S2
It is even, homogeneous solid mixture is formed, speed of agitator 40rad/s stirs 8min；
S3 pours into saturation alcohol rosin solution into homogeneous solid mixture and quickly stirs evenly, speed of agitator 90rad/
S stirs 4min, quickly forms uniform mixture；
S4 takes out uniform mixture, is put into mold hierarchical control compactness, and every roadbed is 0.80；
The sample mould filled is put into 20 DEG C, conserves 36h in the curing box of the constant temperature and humidity of humidity 99%, taken off by S5
Mould is put into climatic chamber and conserves 7d again to get silty analog material.
Silty analog material made from embodiment 3 is opened into steel using the standard pair of 50 × h100mm of Ф of standard
Original mold has sample preparation, and measurement uniaxial compressive strength is 16.51MPa, the average uniaxial compressive strength with silty protolith
(16.12MPa) is very close；Measurement cleavage strength is 1.67MPa, the average cleavage strength with silty protolith
(1.75MPa) is very close；Illustrate that embodiment 3 obtains the higher silty analog material of similarity.
The mass ratio of raw material determines method in the preparation of silty analog material, specifically follows the steps below:
S11 with 20~80 parts of gypsum, 20~80 parts of organically modified montmorillonite clay powder, is saturated 16 parts of alcohol rosin solution as original
Material carries out multiple groups test, prepares silty analog material, measures uniaxial compressive strength, draws gypsum and organically-modified illiteracy
De- mountain flour mass ratio obtains the stone closest to silty original sample uniaxial compressive strength to uniaxial compressive strength change curve
Cream and organically modified montmorillonite clay powder mass ratio, the i.e. optimum quality ratio of gypsum and organically modified montmorillonite clay powder；
S12 is original with the optimum quality ratio of gypsum and organically modified montmorillonite clay powder, 10~21 parts of alcohol rosin solution of saturation
Material carries out multiple groups test, prepares silty analog material, measures uniaxial compressive strength, draws saturation alcohol rosin solution
It is molten to the saturation alcohol rosin of uniaxial compressive strength change curve, acquisition closest to silty original sample uniaxial compressive strength
Liquid additional amount, i.e. saturation alcohol rosin solution optimal addn；
S13, with the optimum quality ratio of gypsum and organically modified montmorillonite clay powder, saturation alcohol rosin solution optimal addn,
0.3~3.6 part of nano aluminium oxide is raw material, carries out multiple groups test, prepares silty analog material, measures cleavage strength,
Nano oxidized aluminium content and cleavage strength change curve are drawn, the nanometer closest to silty original sample cleavage strength is obtained
Aluminium oxide additional amount to get.
Test difficulty to simplify, avoid factor in orthogonal experiment and choose, the mass ratio of above-mentioned raw materials determine method although
Test number (TN) is relatively more, but relatively simple, easy to implement, and the available analog material for meeting protolith requirement is relevant
Mechanical index.
Each material quality ratio of silty analog material is prepared in embodiment A1-A13 is shown in Table 1, embodiment A1-A13's
S2 nano aluminium oxide is not added, other operating procedures are same as Example 3.
Each material quality ratio of silty analog material in 1 embodiment A1-A13 of table
| Embodiment | Formula |
| A1 | 20 parts of gypsum, 80 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A2 | 25 parts of gypsum, 75 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A3 | 30 parts of gypsum, 70 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A4 | 35 parts of gypsum, 65 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A5 | 40 parts of gypsum, 60 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A6 | 45 parts of gypsum, 55 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A7 | 50 parts of gypsum, 50 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A8 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A9 | 60 parts of gypsum, 40 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A10 | 65 parts of gypsum, 35 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A11 | 70 parts of gypsum, 30 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A12 | 75 parts of gypsum, 25 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| A13 | 80 parts of gypsum, 20 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
The gypsum and organically modified montmorillonite clay silty amount of embodiment A1-A13 compares uniaxial compressive strength change curve, sees figure
2, as shown in Figure 2 when 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder (mass ratio 1.2:1), uniaxial compressive strength
(16.51MPa) is closest with silty original sample uniaxial compressive strength (16.12MPa), i.e. gypsum and organically modified montmorillonite clay
The optimum quality ratio of powder is 1.2:1；Embodiment A1-A13 prepares the density of silty analog material, sees Fig. 1, passes through Fig. 1
Illustrate the big (1.9g/cm of the analog material density3~2.5g/cm3) and gypsum and organically-modified illiteracy can be passed through in a big way
De- mountain flour dosage adjustment.
Each material quality ratio of silty analog material is prepared in embodiment B1-B12 is shown in Table 2, embodiment B1-B12's
S2 nano aluminium oxide is not added, other operating procedures are same as Example 3.
Each material quality ratio of silty analog material in 2 embodiment B1-B12 of table
| Embodiment | Formula |
| 1 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 10 parts of alcohol rosin solution； |
| 2 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 11 parts of alcohol rosin solution； |
| 3 | 50 parts of gypsum, 50 parts of organically modified montmorillonite clay powder, it is saturated 12 parts of alcohol rosin solution； |
| 4 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 13 parts of alcohol rosin solution； |
| 5 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 14 parts of alcohol rosin solution； |
| 6 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 15 parts of alcohol rosin solution； |
| 7 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 16 parts of alcohol rosin solution； |
| 8 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 17 parts of alcohol rosin solution； |
| 9 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 18 parts of alcohol rosin solution； |
| 10 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 19 parts of alcohol rosin solution； |
| 11 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 20 parts of alcohol rosin solution； |
| 12 | 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, it is saturated 21 parts of alcohol rosin solution； |
Embodiment B1-B12,45 parts of organically modified montmorillonite clay powder, is saturated 10-21 parts of alcohol rosin solution by 55 parts of gypsum；Mould
Tool uses the cylindrical die of 50 × h100mm of Ф, and standard uniaxial compression sample is made, carries out physics by triaxial compression test
Mechanics parameter test.Saturation alcohol rosin solution (blender) and fine aggregate mass ratio are shown in figure to uniaxial compressive strength change curve
3, when being saturated the 16% of the total fine aggregate quality of alcohol rosin solution dosage Zhan as shown in Figure 3 (16 parts), analog material single shaft is anti-
Average uniaxial compressive strength of the Compressive Strength (15.548MPa) closest to the silty protolith that the likelihood ratio is 1:1
(16.12MPa), saturation alcohol rosin solution optimal addn are 16 parts.
According to embodiment A1-A13, the uniaxial compressive after fine aggregate gypsum and organically modified montmorillonite clay powder substantially match is determined
Intensity value adjusts the dosage of saturation alcohol rosin solution further according to embodiment B1-B12, and effect is molten by saturation alcohol rosin
The dosage of liquid carrys out precise fine-adjustment, and the uniaxial compressive strength value of accurate silty drafts the proportion of final analog material.
Embodiment 4,
A kind of preparation method of silty analog material weighs 55 parts of gypsum according to following mass fraction respectively, has
45 parts of machine smectite powder, 0.3 part of nano aluminium oxide, it is saturated 16 parts of alcohol rosin solution；Other operating procedures and embodiment 3
It is identical.
Fig. 4 is the triaxial compressions stress-strain diagram of embodiment 4, and Fig. 5 is the triaxial compressions stress of true silty
Strain curve；The peak of curve stress of Fig. 4 and Fig. 5 is not much different, and variation tendency relatively, learns that three axis of embodiment 4 are anti-
Compression strength of the Compressive Strength close to true silty.
When saturation alcohol rosin solution dosage of matching by adjusting gypsum and organically modified montmorillonite clay powder respectively realizes list
The adjusting of axis compression strength；Then while meeting control uniaxial compressive strength close to silty protolith index, then lead to
The dosage for overregulating nano aluminium oxide realizes the adjusting of cleavage strength.
Each material quality ratio of silty analog material is prepared in embodiment C1-C5 is shown in Table 3, the quality of nano aluminium oxide
Number is respectively 0.3 part, 0.6 part, 0.9 part, 1.2 parts, 1.5 parts, 1.8 parts 2.1 parts, 2.4 parts, 2.7 parts, 3.0 parts, 3.3 parts,
3.6 parts (i.e. nano aluminium oxide be added quality be fine aggregate quality 0.3%, 0.6%, 0.9%, 1.2%, 1.5%, 1.8%,
2.1%, 2.4%, 2.7%, 3.0%, 3.3%, 3.6%)；Other operating procedures of embodiment C1-C5 are same as Example 3.
Each material quality ratio of silty analog material in 3 embodiment C1-C5 of table
Embodiment C1-C5 is prepared into silty analog material, is made using standard Ф 50 × h50mm cylindrical die
Standard list Brazil splitter disk sample carries out the test of tensile strength physical and mechanical parameter, measures cleavage strength；Nano aluminium oxide adds
Enter amount and cleavage strength change curve, sees Fig. 6, it will be appreciated from fig. 6 that when gypsum and organically modified montmorillonite clay powder mass ratio are 1.2:1,
When nano aluminium oxide is 1.5 parts, the cleavage strength (1.80MPa) and silty protolith of silty analog material are cleaved
Intensity (1.75MPa) is closest, more meets the property of protolith analog material.
It is tested by similar material mixture, uniaxial compression sample, available corresponding test number is carried out to multiple groups sample
It is 20 parts of gypsum according to uniaxial compressive strength peak stress minimum proportion, 80 parts of organically modified montmorillonite clay powder, saturation alcohol rosin is molten
2.21MPa under 16 parts of liquid proportions, uniaxial compressive strength peak stress maximum proportion are 80 parts of gypsum, organically modified montmorillonite clay powder
20 parts, be saturated 16 parts of 28.55MPa of alcohol rosin solution, between intensity can by allotment fine aggregate with when saturation alcohol pine
Fragrant solution usage realizes the uniaxial compressive strength peak stress adjusting range between 2.21~28.55MPa.For cleavage strength
Between 1.6~2.0MPa, also according under the uniaxial compressive strength for being 1:1 closest to the likelihood ratio, pass through addition nano oxygen
Change aluminium, improve the tensile strength of material, so the splitting for being able to ascend analog material after suitable incorporation nano aluminium oxide is strong
Degree is participating in 55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, 0.3 part of nano aluminium oxide, is being saturated 16 parts of alcohol rosin solution
Under, cleavage strength 1.0MPa；55 parts of gypsum, 45 parts of organically modified montmorillonite clay powder, 3.6 parts of nano aluminium oxide, saturation alcohol pine
16 parts, cleavage strength 1.8MPa of fragrant solution, change between cleavage strength.
The raw material sources of silty analog material of the present invention are extensive, cheap, nontoxic；Present invention preparation
Silty analog material density range reach 1.9g/cm3~2.5g/cm3, uniaxial compressive strength peak stress adjustment model
It is trapped among between 2.21~28.55MPa, between 1.6~2.0MPa, the averag density of silty protolith is cleavage strength
2.23g/cm3, average uniaxial compressive strength 16.12MPa, average cleavage strength 1.75MPa；It can be seen that aleuritic texture produced by the present invention
Compression strength, cleavage strength, the density of mud stone analog material are consistent with silty protolith, and three parameters meet powder simultaneously
The likelihood ratio of Sandy Silt protolith is close to 1:1；Most of silty process of deformation and failure can be simulated；Pass through nano oxygen
Change aluminium and adjust cleavage strength, easy to adjust, the preparation method of silty analog material of the present invention is simple, pouring molding, behaviour
Facilitate, easy to form, homogeneity is good, and property is stablized, and can be widely applied to the related mechanics mould for accurately simulating silty
Type experimental study.
Silty analog material produced by the present invention has multiple characteristic parameters of protolith sample, can be used in carrying out
Complicated rocks experiment, such as largely can be used to simulate water swelling experiment, the crack of multifactor lower silty protolith
The experiment such as creep test, Seepage Experiment, creep-seepage flow analyzes different affecting factors to silty analog material rock mass object
Different Effects and crack Damage Constitutive Model that mechanical property generates are managed, analogy obtains the characteristic of silty protolith sample,
Sample preparation is convenient and efficient, experimental cost is low, avoids influence of the defect existing for protolith to experimental result；It can pour and build up large-scale aleuritic texture
The engineerings such as slope rock mass, foundation pit, the tunnel surrounding of mud stone analog material, effective prefabricated crack, joint, etc. initial imperfections, setting
The model experiment of different scale is obtained correlation engineering characteristic, is avoided using the practical silty engineering of centrifugal analogy analysis
Carry out the experiment in situ of large-scale scene, repeatability is high, saves time and cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of silty analog material, which is characterized in that form: 20~80 parts of gypsum, having according to following mass fraction
20~80 parts of machine smectite powder, 0.3~3.6 part of nano aluminium oxide, it is saturated 10~21 parts of alcohol rosin solution.
2. a kind of silty analog material according to claim 1, which is characterized in that 55 parts of the gypsum, it is organic
45 parts of smectite powder, 0.3~3.6 part of nano aluminium oxide, it is saturated 10~21 parts of alcohol rosin solution.
3. a kind of silty analog material according to claim 2, which is characterized in that 55 parts of the gypsum, it is organic
45 parts of smectite powder, 0.3~3.6 part of nano aluminium oxide, it is saturated 16 parts of alcohol rosin solution.
4. a kind of silty analog material according to claim 3, which is characterized in that 55 parts of the gypsum, it is organic
45 parts of smectite powder, 1.5 parts of nano aluminium oxide, it is saturated 16 parts of alcohol rosin solution.
5. a kind of silty analog material according to claim 1, which is characterized in that the partial size of the gypsum is
2000~3000 mesh, gypsum hardness are 8.5mp.
6. a kind of silty analog material according to claim 1, which is characterized in that the organically modified montmorillonite clay
The partial size of powder is 200~400 mesh.
7. a kind of silty analog material according to claim 1, which is characterized in that the grain of the nano aluminium oxide
30 ± 10nm of diameter, purity >=98.0%.
8. a kind of preparation method of silty analog material, which is characterized in that specifically follow the steps below:
S1 weighs raw material: weighing 20~80 parts of gypsum respectively according to following mass fraction, organically modified montmorillonite clay powder 20~80
Part, 0.3~3.6 part of nano aluminium oxide, it is saturated 10~21 parts of alcohol rosin solution；
Weighed gypsum, organically modified montmorillonite clay powder, nano aluminium oxide are poured into blender simultaneously, fully mixed uniformly, shape by S2
At homogeneous solid mixture, 30~50rad/s of speed of agitator, 5~10min of mixing time；
S3 pours into saturation alcohol rosin solution into homogeneous solid mixture and quickly stirs evenly, 80~100rad/ of speed of agitator
S, 2~5min of mixing time form uniform mixture；
S4 takes out uniform mixture, is put into mold hierarchical control compactness, and every roadbed is 0.75~0.85；
S5, by the sample mould filled be put into 17~23 DEG C, maintenance 24 in the constant-temp. and-moisture maintenance of 95% or more humidity~
48h, demoulding, is put into climatic chamber and conserves 7~8d again to get silty analog material.
9. a kind of preparation method of silty analog material according to claim 8, which is characterized in that the S1
In, it is saturated the preparation method of alcohol rosin solution: the rosin powder weighed up being put into container, alcohol is poured slowly into, uses glass
Stick filters out bottom residue rosin by the uniform velocity stirring evenly clockwise, obtains saturation alcohol rosin solution, and alcohol uses mass concentration
90% medicinal alcohol or industrial alcohol.
10. a kind of preparation method of silty analog material according to claim 8, which is characterized in that the step
In rapid S1, the mass ratio of raw material determines method, specifically follows the steps below:
S11, with 20~80 parts of gypsum, 20~80 parts of organically modified montmorillonite clay powder, 16 parts of alcohol rosin solution of saturation for raw material, into
The test of row multiple groups, prepares silty analog material, measures uniaxial compressive strength, draws gypsum and organically modified montmorillonite clay powder
Mass ratio obtains gypsum closest to silty original sample uniaxial compressive strength and has to uniaxial compressive strength change curve
Machine smectite powder mass ratio, the i.e. optimum quality ratio of gypsum and organically modified montmorillonite clay powder；
S12, with the optimum quality ratio of gypsum and organically modified montmorillonite clay powder, 10~21 parts of alcohol rosin solution of saturation for raw material,
Multiple groups test is carried out, silty analog material is prepared, measures uniaxial compressive strength, draws saturation alcohol rosin solution to list
Axis compression strength change curve, the saturation alcohol rosin solution obtained closest to silty original sample uniaxial compressive strength add
Enter amount, i.e. saturation alcohol rosin solution optimal addn；
S13, with the optimum quality ratio of gypsum and organically modified montmorillonite clay powder, saturation alcohol rosin solution optimal addn, nanometer
0.3~3.6 part of aluminium oxide is raw material, carries out multiple groups test, prepares silty analog material, measure cleavage strength, draws
Nano oxidized aluminium content and cleavage strength change curve are obtained closest to the nano oxidized of silty original sample cleavage strength
Aluminium additional amount to get.
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