CN105152599A - Cement-base composite material for grouting treatment of water-rich fractured rocks and preparation process of cement-base composite material - Google Patents

Cement-base composite material for grouting treatment of water-rich fractured rocks and preparation process of cement-base composite material Download PDF

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CN105152599A
CN105152599A CN201510526616.7A CN201510526616A CN105152599A CN 105152599 A CN105152599 A CN 105152599A CN 201510526616 A CN201510526616 A CN 201510526616A CN 105152599 A CN105152599 A CN 105152599A
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powder
cement
base composite
mineralizer
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CN105152599B (en
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李术才
李召峰
刘人太
白继文
贾广辉
沙飞
孙子正
张红军
张世杰
徐程
郑卓
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Shandong University
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Abstract

The invention relates to a cement-base composite material for grouting treatment of water-rich fractured rocks and a preparation process of the cement-base composite material. The cement-base composite material for grouting treatment of water-rich fractured rocks comprises, by mass, 69-77 parts of portland cement clinker, 23-31 parts of mineralizer and 0.34-1.55 parts of additive powder retarder. The mineralizer comprises, by mass, 75-79 parts of ground quartz, 6.8-7.6 parts of calcium chloride, 2.8-3.6 parts of lithium chloride, 1.9-2.4 parts of talcum powder, 2.0-2.5 parts of hydroxypropyl methyl cellulose, 2.1-2.6 parts of wollastonite powder, 0.6-0.9 part of titanium dioxide, 3.1-3.8 parts of sodium hexametaphosphate and 1.5-2.1 parts of super plasticizer. Since portland cement clinker and mineralizer are processed by the combined grinding technology, and specific surface area of the material is controlled to be larger than 500m2/kg and residue on sieves of 80 micrometers in a vacuum sieving process is controlled to be less than 8% respectively by the Blaine method and the vacuum sieving analysis method, uniform performance of the material is achieved. Condensation time of the material is controllable, the strength of the material is high in early stage and later period, volume expansion of the material is slight, retention of the material is over 91% on a condition of 30m/min flowing water, and accordingly, the material can be applied to grouting reinforcement treatment engineering of water-rich fractured rocks widely.

Description

For cement-base composite material and the preparation technology of rich water fragmented rock body grouting treatment
Technical field
The invention belongs to materials science field, relate to the cement-base composite material for rich water fragmented rock body grouting treatment and preparation technology.
Background technology
The geologic condition that China's underground engineering construction faces is increasingly sophisticated, when the underground works such as tunnel, mine working, urban track traffic meets the harm geological structure such as rich water tomography, very easily there is the disasters such as country rock gross distortion, landslide, water burst, there is rock crusher, self-bearing ability is poor, water burst area is large, water yield greatly, the not easily feature such as shutoff.
Slip casting obtains as the effective means of reinforcing breaking surrounding rock and shutoff water burst and applies more and more widely in underground works.But in the market also not for the grouting treatment material of rich water fragmented rock body.The Portland cement condensation of materials time is longer, is difficult to retain after injecting rich water ravelly ground, and volume drying shrinkage after grout hardens, be difficult to realize water burst shutoff; Rapid hardening class cement material such as cement-sodium silicate, aluminosulfate cement etc. affect seriously by underground water temperature, and slurries are difficult to effective diffusion, and later strength is lower or occur retraction; Partial chemical slurries have can reinforce the performance that breaking surrounding rock can realize again water burst shutoff, but under the effect of the factor such as underground water temperature and salinity, curing reaction speed is wayward, particularly the organic-based material later stage is seriously aging, and material price is high, partial chemical slurries exist certain toxicity, limits the application of such injecting paste material.Above-mentioned materials in process, should not take into full account that the change of rich water ravelly ground thermograde and high-temperature and high-pressure conditions are on the impact of injecting paste material, often cause slip casting effect undesirable.
Grouting treatment for rich water fragmented rock body needs that research and development time of coagulation is controlled, early stage and later strength is strong, volume stability is good, water blockoff ability is strong, cheap, the injecting paste material of nontoxic pollution-free badly.
Summary of the invention
We are bright develops a kind of cement based combined casting material for rich water fragmented rock body grouting treatment, this kind of material not only has that first final setting time is controlled, early anaphase intensity is high, water blockoff ability is strong, cheap, the advantage of environment-protecting asepsis, and can stablize by size performance in wide temperature range or under high-temperature and high-pressure conditions, realize the grouting treatment to rich water ravelly ground.
Portland clinker has fast, the dry-shrinkage deformed large feature of hydration rate, but there is water resistant erosion, resistance to acid erosion and the problem with mineralizer bad adaptability, for overcoming above-mentioned shortcoming, the present invention is by regulation and control cement clinker particle diameter and mineralizer preferred, improve cement clinker particles grating and surface property, control the way of contact and the speed of reaction of cement clinker particles and water, improve the adaptability of cement clinker and mineralizer, achieve effective control of material slurry performance.
For achieving the above object, the present invention adopts following technical proposals:
For a cement-base composite material for rich water fragmented rock body grouting treatment, be made up of the component of following parts by weight: Portland clinker is 69-77 part, mineralizer is 23-31 part, and mixing powder retardant is outward 0.34-1.55 part; Wherein, in described mineralizer, each composition weight number is as follows: silica powder 75-79 part, calcium chloride 6.8-7.6 part, lithium chloride 2.8-3.6 part, talcum powder 1.9-2.4 part, Vltra tears 2.0-2.5 part, wollastonite powder 2.1-2.6 part, titanium dioxide 0.6-0.9 part, Sodium hexametaphosphate 99 3.1-3.8 part, superplasticizer 1.5-2.1 part.
Portland clinker is hydraulic cementing materials, generates the main source that hydrated calcium silicate gel is consolidating strength after itself and water react, and by cemented together for other components in close of material, can improve material Seed harvest density and anti-permeability performance.
Wherein, when the content of Portland clinker is lower than 69 weight part, consolidating strength and anti-permeability performance bad.On the other hand, if the content of Portland clinker is higher than 77 weight parts, then material cost can be caused to raise.The present invention confirms following result: if during the scope of the content of Portland clinker more than 69 weight parts and below 77 weight parts, consolidating strength, density and anti-permeability performance that the phase that can obtain is desirable.
Vltra tears can produce surfactivity and polarity effect on material granule surface, and the solidifying floc sedimentation weakened between material particles gathers, and self has water retention property simultaneously; When the superplasticizer selected is polycarboxylate water-reducer, by with Vltra tears acting in conjunction, the workability of slurries can be improved, make slurries not easily laminated segregation, ensure that slurries have higher serviceability, slurries retention ratio when the viscosity of slurries and dynamic water wash away can also be improved.With regard to its content, although cannot treat different things as the same, when the content of Vltra tears is lower than 2 weight part, reduce slurries workability, easy laminated segregation.
When the content of Vltra tears is higher than 2.5 weight part, slurries are elongated for time of coagulation, and slurry viscosity increases, and is not easy to the diffusion of slurries in rich water ravelly ground.Therefore, the problems referred to above can not be produced when the add-on of Vltra tears being limited to below 2.5 weight parts in the application.
Select calcium chloride and lithium chloride as hardening accelerator, in hydration process, chlorion can accelerate the hydration rate of the inner silicate minerals of material system, promotes the formation of hydrated calcium silicate gel.Simultaneously after Sodium hexametaphosphate 99 hydrolysis, effectively dispersing material component as inner glass body structures such as silica powders, the polymerization formation gel of slurry system mesosilicic acid radical ion and calcium ion can be accelerated, improve slurries rapid coagulation sclerosis under high water-cement ratio condition.By adjusting above-mentioned three kinds of amounts of components, to reach at water cement ratio for 0.8 ~ 1.2, when envrionment temperature is 0 ~ 40 DEG C, the presetting period can control between 5 ~ 90 minutes, final setting time can control between 80 ~ 120 minutes, thus adjusted the best time of coagulation of slurries according to engineering demand.
Wherein, calcium chloride and lithium chloride are as hardening accelerator, and in hydration process, chlorion can accelerate the hydration rate of the inner silicate minerals of material system, promotes the formation of hydrated calcium silicate gel.Namely can be used alone also can be used in combination, when used as a mixture, should control the content of calcium chloride and lithium chloride in described scope.When the total content of calcium chloride and lithium chloride is lower than 9.6 weight part, after grout hardens, the mineral generating rate such as hydrated calcium silicate condensation and quantity all can significantly reduce, and slurry intensity is difficult to ensure.On the other hand, if when the total content of calcium chloride and lithium chloride is higher than 11.2 weight part, slurry system inner sodium calcium chlorion is too much, is difficult to completely by gelling mineral absorption, after causing grout hardens there is accumulation of salt in the surface soil frosting phenomenon in Seed harvest surface, reduces consolidating strength and weather resistance.Confirm following result: during the scope making calcium chloride and lithium chloride total content respectively more than 9.6 weight parts and below 11.25 weight parts, good early stage and later strength and volume stability can be obtained.
Select wollastonite powder and talcum powder to improve slurry fluidity, also can reduce the surface energy of slurries, ensure that slurries can effectively spread after injecting stratum.
Wherein, when wollastonite powder and talcous total content are lower than 4 weight part, pulp flow degree and diffustivity reduce.On the other hand, if wollastonite powder and talcous total content are higher than 5 weight parts, then can increase slurries water requirement, and cause material cost to raise.The present invention confirms following result: if during scope more than 4 weight parts and below 5 weight parts of wollastonite powder and talcous content, can obtain desirable slurry fluidity and diffustivity.
Meanwhile, wollastonite powder can provide sufficient siliceous element in the material aquation later stage, absorbs calcium more than needed in slurry system, the condensation of sodium plasma formation Calucium Silicate powder sodium, improves Seed harvest later strength and compactness.Preferred wollastonite powder consumption is 2.1-2.6 weight part.
Can packing material internal void as the silica powder of ultra-fine aggregate and titanium dioxide, consolidating strength, anti-permeability performance and ageing resistance are provided.With regard to its content, although cannot treat different things as the same, when the total content of silica powder and titanium dioxide is lower than 75.6 weight part, after grout hardens, Seed harvest internal void can not be filled with completely, and Seed harvest is greatly dry-shrinkage deformed, and density reduces, and is imperviously deteriorated.
On the other hand, when the content of silica powder and titanium dioxide is higher than 79.9 weight part, slurries workability and mobility can be caused to decline, occur segregation demixing phenomenon.Therefore, in the application, total add-on of silica powder and titanium dioxide is limited to below 79.9 weight parts, can not the problems referred to above be produced.
With regard to the cement-base composite material for rich water fragmented rock body grouting treatment of the present invention, described cement-base composite material preferably adopts following proportioning: Portland clinker is 72-75 part, and mineralizer is 27-30 part, and mixing powder retardant is outward 0.6-0.9 part; In described mineralizer, each composition weight number is as follows: silica powder 77-79 part, calcium chloride 7.2-7.4 part, lithium chloride 3.2-3.4 part, talcum powder 2.1-2.3 part, Vltra tears 2.2-2.4 part, wollastonite powder 2.2-2.4 part, titanium dioxide 0.7-0.8 part, Sodium hexametaphosphate 99 3.2-3.6 part, superplasticizer 1.8-2.0 part.
With regard to the cement-base composite material for rich water fragmented rock body grouting treatment of the present invention, described cement-base composite material preferably adopts following proportioning: Portland clinker is 73 parts, mineralizer is 27 parts, mixing powder retardant is outward 1.25 parts, wherein, described mineralizer component and mass ratio are: silica powder 77 parts, 7.2 parts, calcium chloride, lithium chloride 3 parts, talcum powder 2.2 parts, Vltra tears 2.2 parts, wollastonite powder 2.2 parts, titanium dioxide 0.8 part, Sodium hexametaphosphate 99 3.6 parts, superplasticizer 1.8 parts.
Portland clinker of the present invention and mineralizer polycomponent divide order compound tense, due to mutually poor for applicability between each component, easily there is the inhomogenous problem of material property, for overcoming above-mentioned shortcoming, the present invention adopts polycomponent combined grinding technique, ball grinder interior liner plate is become flat shape from a kind of shape, stepped appearance and waveform three kinds are spaced, and set up bin isolation board quantity in grinding machine, particle diameter and the fineness of grind materials is effectively controlled out by adjustment air sorting machine for powder wind speed, the material component with different hardness can fully obtain grinding fragmentation, realize the abundant fusion of silicate cement grog and polycomponent mineralizer, ensure that the stable homogeneous of material property.
Described Portland clinker is crushed to particle diameter and is less than 8mm.
Described Portland clinker is the Portland clinker meeting GB/T21372-2008, described powder retardant is the powder citric acid system retardant meeting GB8075-2005, described silica powder specification is 1000M, described calcium chloride is solid water-free calcium chloride, described lithium chloride is solid water-free calcium chloride, described talcum powder specification is 1250M, described wollastonite powder specification is 500M, described silica powder specification is 325M, described Vltra tears is HT-K80000S type, described Sodium hexametaphosphate 99 must meet HG/T2519-2007, described superplasticizer is the powder polycarboxylic acids water reducing agent that solid content is greater than 90%, described preparation technology Bo Shi method measurement the specific area test must meet GBT_8074-2008, described preparation technology's negative pressure sieve formula test 80um negative pressure tails over and must meet GB/T1345.
Present invention also offers a kind of preparation method of the cement-base composite material for rich water fragmented rock body grouting treatment, comprise the steps:
(1) Portland clinker is crushed to particle diameter and is less than 8mm;
(2) take silica powder, calcium chloride, lithium chloride, talcum powder, Vltra tears, wollastonite powder, titanium dioxide, Sodium hexametaphosphate 99, superplasticizer according to mineralizer composition weight proportioning, carry out Homogenization Treatments;
(3) Portland clinker of above-mentioned preparation and mineralizer are carried out grinding, adopt Bo Shi method to control out grind materials specific surface area and be greater than 500m 2/ kg, adopts negative pressure sieve formula control 80um negative pressure to tail over and is less than 8%.
(4) mixer is adopted to enter powder retardant to the outer admixture of material after grinding.
The above-mentioned cement-base composite material for rich water fragmented rock body grouting treatment can be used for reinforcing rich water fragmented rock body and shutoff water burst.
The invention has the beneficial effects as follows
(1) material of the present invention is single fluid grouting material, when water cement ratio is 0.8 ~ 1.2, time of coagulation stablizes controlled, when envrionment temperature is 0 ~ 40 DEG C, presetting period can control between 5 ~ 90 minutes, and final setting time can control between 80 ~ 120 minutes; Adopt material of the present invention, Effective Regulation can be carried out according to requirement of engineering in slurries time of coagulation, ensure that slurries have good operability and engineering adaptability;
(2) material of the present invention 1 day intensity is up to 6MPa, and within 28 days, intensity is up to 48MPa, and in the dynamic water of flow velocity 30m/min, retention ratio is up to 91%, and during aquation 28 days, Seed harvest rate of expansion can reach 8%; Solve the problem that conventional cement base grouting material early strength is low, be difficult to retention, later stage Seed harvest drying shrinkage in dynamic water, achieve the synchronous integrated of rich water fragmented rock body grouting and reinforcing and water blockoff.
(3) its preparation technology of material of the present invention achieves the abundant compound of multi-component material, reaches the object of each component over-superimposed effect, solves the difficult problem that traditional preparation methods exists material homogeneity difference.
Embodiment
Concrete embodiment one
1, component and mass ratio: Portland clinker: mineralizer is 73:27, mixes powder retardant outward: 1.25 parts.Mineralizer component and mass ratio are: silica powder 77 parts, 7.2 parts, calcium chloride, lithium chloride 3 parts, talcum powder 2.2 parts, Vltra tears 2.2 parts, wollastonite powder 2.2 parts, titanium dioxide 0.8 part, Sodium hexametaphosphate 99 3.6 parts, superplasticizer 1.8 parts.
2, preparation technology: cement-base composite material grinding fineness is that 5502/kg, 80um negative pressure tails over is 5.5%, is 1:1 mixing and stirring by water cement ratio.
3, index parameter is as following table 1:
Table 1
Be used for transforming seat earth limestone aquifer by the grout transformation material of above-mentioned preparation, achieve by ground to buried depth-960 meters of long-distance pumpings, circumstance of temperature difference is changed to 20 DEG C, effectively transform waterbearing stratum as water-resisting layer.
Concrete embodiment two
1, component and mass ratio: Portland clinker: mineralizer is 73:27, mixes powder retardant outward: 1.25 parts.Mineralizer component and mass ratio are: silica powder 76 parts, 7.4 parts, calcium chloride, lithium chloride 3.6 parts, talcum powder 2.4 parts, Vltra tears 2.4 parts, wollastonite powder 2.6 parts, titanium dioxide 0.6 part, Sodium hexametaphosphate 99 3.1 parts, superplasticizer 1.9 parts.
2, preparation technology: cement-base composite material grinding fineness is that 5502/kg, 80um tail over is 5.5%, is 1:1 mixing and stirring by water cement ratio.
3, index parameter is as following table 2:
Table 2
Concrete embodiment three
1, component and mass ratio: Portland clinker: mineralizer is 70:30, mixes powder retardant outward: 1.45 parts.Mineralizer component and mass ratio are: silica powder 77 parts, 7.2 parts, calcium chloride, lithium chloride 3 parts, talcum powder 2.2 parts, Vltra tears 2.2 parts, wollastonite powder 2.2 parts, titanium dioxide 0.8 part, Sodium hexametaphosphate 99 3.6 parts, superplasticizer 1.8 parts.
2, preparation technology: cement-base composite material grinding fineness is that 5702/kg, 80um negative pressure tails over is 7.3%, is 1:1 mixing and stirring by water cement ratio.
3, index parameter is as following table 3:
Table 3
Concrete embodiment four
1, component and mass ratio: Portland clinker: mineralizer is 70:30, mixes powder retardant outward: 1.45 parts.Mineralizer component and mass ratio are: silica powder 75 parts, 7.6 parts, calcium chloride, lithium chloride 3.6 parts, talcum powder 2.1 parts, Vltra tears 2.6 parts, wollastonite powder 2.5 parts, titanium dioxide 0.6 part, Sodium hexametaphosphate 99 3.8 parts, superplasticizer 2.2 parts.
2, preparation technology: cement-base composite material grinding fineness is that 5702/kg, 80um negative pressure tails over is 4.3%, is 1:1 mixing and stirring by water cement ratio.
3, index parameter is as following table 4:
Table 4
Concrete embodiment five
1, component and mass ratio: Portland clinker: mineralizer is 78:22, mixes powder retardant outward: 1.45 parts.Mineralizer component and mass ratio are: silica powder 77 parts, 7.2 parts, calcium chloride, lithium chloride 3 parts, talcum powder 2.2 parts, Vltra tears 2.2 parts, wollastonite powder 2.2 parts, titanium dioxide 0.8 part, Sodium hexametaphosphate 99 3.6 parts, superplasticizer 1.8 parts.
2, preparation technology: cement-base composite material grinding fineness is that 5502/kg, 80um negative pressure tails over is 7.1%, is 1:1 mixing and stirring by water cement ratio.
3, index parameter is as following table 5:
Table 5
Concrete embodiment six
1, component and mass ratio: Portland clinker: mineralizer is 78:22, mixes powder retardant outward: 1.45 parts.Mineralizer component and mass ratio are: silica powder 74 parts, 7.3 parts, calcium chloride, lithium chloride 3.9 parts, talcum powder 2.4 parts, Vltra tears 2.7 parts, wollastonite powder 2.6 parts, titanium dioxide 0.6 part, Sodium hexametaphosphate 99 3.3 parts, superplasticizer 2.2 parts.
2, preparation technology: cement-base composite material grinding fineness is that 5502/kg, 80um negative pressure tails over is 6.9%, is 1:1 mixing and stirring by water cement ratio.
3, index parameter is as following table 6:
Table 6
Although above-mentioned, the specific embodiment of the present invention is described; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.

Claims (8)

1. for a cement-base composite material for rich water fragmented rock body grouting treatment, it is characterized in that, be made up of the component of following parts by weight: Portland clinker is 69-77 part, mineralizer is 23-31 part, and mixing powder retardant is outward 0.34-1.55 part; Wherein, in described mineralizer, each composition weight number is as follows: silica powder 75-79 part, calcium chloride 6.8-7.6 part, lithium chloride 2.8-3.6 part, talcum powder 1.9-2.4 part, Vltra tears 2.0-2.5 part, wollastonite powder 2.1-2.6 part, titanium dioxide 0.6-0.9 part, Sodium hexametaphosphate 99 3.1-3.8 part, superplasticizer 1.5-2.1 part.
2. cement-base composite material as claimed in claim 1, it is characterized in that, be made up of the component of following parts by weight: Portland clinker is 72-75 part, mineralizer is 27-30 part, and mixing powder retardant is outward 0.6-0.9 part; Wherein, in described mineralizer, each composition weight number is as follows: silica powder 77-79 part, calcium chloride 7.2-7.4 part, lithium chloride 3.2-3.4 part, talcum powder 2.1-2.3 part, Vltra tears 2.2-2.4 part, wollastonite powder 2.2-2.4 part, titanium dioxide 0.7-0.8 part, Sodium hexametaphosphate 99 3.2-3.6 part, superplasticizer 1.8-2.0 part.
3. cement-base composite material as claimed in claim 1, is characterized in that, be made up of the component of following parts by weight: Portland clinker is 73 parts, mineralizer is 27 parts, and mixing powder retardant is outward 1.25 parts, wherein, described mineralizer component and mass ratio are: silica powder 77 parts, 7.2 parts, calcium chloride, lithium chloride 3 parts, talcum powder 2.2 parts, Vltra tears 2.2 parts, wollastonite powder 2.2 parts, titanium dioxide 0.8 part, Sodium hexametaphosphate 99 3.6 parts, superplasticizer 1.8 parts.
4. the cement-base composite material as described in as arbitrary in claim 1-3, it is characterized in that, described Portland clinker is the Portland clinker meeting GB/T21372-2008, described outer powder retardant of mixing is the powder citric acid system retardant meeting GB8075-2005, described silica powder specification is 1000M, described calcium chloride is solid water-free calcium chloride, described lithium chloride is solid water-free calcium chloride, described talcum powder specification is 1250M, described wollastonite powder specification is 500M, described titanium dioxide specification is 325M, described Vltra tears is HT-K80000S type, described Sodium hexametaphosphate 99 must meet HG/T2519-2007, described superplasticizer is the powder polycarboxylic acids water reducing agent that solid content is greater than 90%.
5. cement-base composite material as claimed in claim 1, it is characterized in that, described Portland clinker is crushed to particle diameter and is less than 8mm.
6., for a preparation method for the cement-base composite material of rich water fragmented rock body grouting treatment, it is characterized in that, comprise the steps:
(1) Portland clinker is crushed to particle diameter and is less than 8mm;
(2) take silica powder, calcium chloride, lithium chloride, talcum powder, Vltra tears, wollastonite powder, titanium dioxide, Sodium hexametaphosphate 99, superplasticizer according to mineralizer composition weight proportioning, carry out Homogenization Treatments;
(3) Portland clinker of above-mentioned preparation and mineralizer are carried out combined grinding, adopt Bo Shi method to control out grind materials specific surface area and be greater than 500m 2/ kg, adopts negative pressure sieve formula control 80um negative pressure to tail over and is less than 8%;
(4) mixer is adopted to enter powder retardant to the outer admixture of material after grinding.
7. the cement-base composite material for rich water fragmented rock body grouting treatment prepared of method according to claim 6.
8. the arbitrary described cement-base composite material for rich water fragmented rock body grouting treatment of claim 1-5 or the cement-base composite material for rich water fragmented rock body grouting treatment according to claim 7 are reinforcing the application in rich water fragmented rock body and shutoff water burst.
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Publication number Priority date Publication date Assignee Title
CN107572994A (en) * 2017-09-30 2018-01-12 山东大学 High Efficiency Superfine cement base combined casting material, preparation technology and application for water-rich sand layer grouting treatment
CN107619236A (en) * 2017-09-30 2018-01-23 山东大学 It is a kind of to be used for microfissure and the high-performance superfine cement based grouting material of powder fine sand soil grouting treatment and its application
CN107619236B (en) * 2017-09-30 2019-07-12 山东大学 A kind of high-performance superfine cement based grouting material and its application for microfissure and powder fine sand soil grouting treatment
CN107572994B (en) * 2017-09-30 2019-07-16 山东大学 High Efficiency Superfine cement base combined casting material, preparation process and application for water-rich sand layer grouting treatment
CN112250395A (en) * 2020-10-27 2021-01-22 西北矿冶研究院 Broken rock stratum roadway wall thickness grouting material and preparation method thereof

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