CN104591646A - Grouting material for surrounding rock - Google Patents

Grouting material for surrounding rock Download PDF

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Publication number
CN104591646A
CN104591646A CN201410837227.1A CN201410837227A CN104591646A CN 104591646 A CN104591646 A CN 104591646A CN 201410837227 A CN201410837227 A CN 201410837227A CN 104591646 A CN104591646 A CN 104591646A
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CN
China
Prior art keywords
cement
parts
water glass
injecting paste
grouting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410837227.1A
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Chinese (zh)
Inventor
宋再春
岳增国
赫敏
许晨
纪美术
王海龙
高目全
董征
刘庆新
楼剑军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National Petroleum Corp
China Petroleum Pipeline Bureau Co Ltd
Original Assignee
China National Petroleum Corp
China Petroleum Pipeline Bureau Co Ltd
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Publication date
Application filed by China National Petroleum Corp, China Petroleum Pipeline Bureau Co Ltd filed Critical China National Petroleum Corp
Priority to CN201410837227.1A priority Critical patent/CN104591646A/en
Publication of CN104591646A publication Critical patent/CN104591646A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a grouting material for surrounding rock, belonging to the technical field of constructional engineering. The grouting material comprises the following components in parts by weight: 1-5 parts of water glass, 20-80 parts of superfine cement, 1-60 parts of coal ash, 1-20 parts of clay, 1-15 parts of silica powder and 1-10 parts of calcium hydroxide. A small amount of silica powder and calcium hydroxide are added into the superfine cement, and fine spherical silica powder particles are easily filled among cement particles, so that the compactness of the set cement is improved, and the porosity is reduced; and moreover, active SiO2 in the silica powder can be hydrated with cement so as to release Ca(OH)2, CSH gel for producing Ca/Si is reacted, and the gel strength is higher than that of thick and porous Ca(OH)2 crystals, so that the strength of grout stones is further greatly improved, and a dual reinforcement effect is achieved. Meanwhile, a small amount of water glass is added, so that the gelling time of cement grout is shortened and controlled, and the stability and groutability are improved.

Description

A kind of injecting paste material for country rock
Technical field
The present invention relates to a kind of injecting paste material for country rock, the technical field of particularly construction work.
Background technology
Slip casting, (Injection grouting) is also called grouting (Grouting), it is that certain material formulation is become slurries, poured in stratum or crack with force feed equipment make it expand, gelling or solidification, to reach the object of strengthening stratum or impervious leakage-stopping.The flow process of grouting serous fluid is slurries and is noted the coefficient result of medium, under deep crack rock is in complicated hydrogeological conditions, existing crack osmotic grouting material and grouting theory are difficult to meet actual requirement of engineering, and the selection of injecting paste material (i.e. slurries) is one of key condition of wall rock reinforcement and antiseep, Deep Mine water prevention is of great practical significance.
Current injecting paste material, is mainly divided into two large classes:
First chemical grout, the advantages such as such material has good stability, the property noted is strong, viscosity is low, gel time is easily controlled, and more tiny crack or the hole of ground can be injected.Common are acrylic amide, lignin, urea-formaldehyde resin class, polyurethane class and epoxy resin slurries, but its weak point is:
Test piece intensity is lower, and weather resistance is poor, and produce surrounding environment and pollute, price is more expensive.Therefore, in the general less employing of grouting and reinforcing engineering.
It two is cement plasmoid humors, and what application was wider at present has cement list liquid, Cement fly ash, cement-bentonite grout and cement soluble glass paste etc.Although such material has abundant raw material source, cheap and test piece intensity advantages of higher, but due to its exist gel time longer and not easily accurately control, high, the poor stability of syneresis rate and the shortcoming such as gain in strength speed is slow, and exist in large-cavity strata easily there is spillage and in stratum, fine porosity the property noted difference etc. phenomenon, grouting quality be difficult to ensure.Especially cement-water-clay system, this material is because of advantages such as concrete castability are good, early strength is high, calculus rate is high, price is low, be one of a kind of economical and practical injecting paste material commonly used at present, but the weak point of these slurries is: Seed harvest shrinkage is large, later strength declines rapidly; In water after maintenance 28-90 days, intensity just obviously declines, and just ftractureed after half a year even disintegration powdered, thus loses use value.Particularly under the condition of dry dehydration, drying shrinkage disintegration is just rapider, and therefore these slurries generally can only be confined to provisional low engineering reinforcement antiseepage, the use of leak stopping.
In recent years, done a large amount of research work improving cement plasmoid humor aspect of performance both at home and abroad, such as, adopted various chemical additive to shorten and controlled the gel time of cement plasmoid humor, to improve its stability, property noted etc.But because different underground rock construction environment is different, especially Jinzhou cave depot engineering, especially unique stratum characteristic, this kind of injecting paste material of application cement plasmoid humor carries out wall rock reinforcement, the effect of antiseepage non-significant.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of injecting paste material for country rock, solves injecting paste material reinforcing anti-seepage weak effect of the prior art, is suitable for the technical problem of limitation.
For solving the problems of the technologies described above, the invention provides a kind of injecting paste material for country rock, it is made up of the component of following weight percent:
Superfine cement: 20-80, flyash: 1-60,
Clay: 1-20, silica flour: 1-15,
Calcium hydroxide: 1-10 water glass: 1-5.
Further, a kind of injecting paste material for country rock, it is made up of the component of following weight percent:
Superfine cement: 20-60, flyash: 10-40,
Clay: 5-20, silica flour: 8-15,
Calcium hydroxide: 1-5 water glass: 1-3.
Further, a kind of injecting paste material for country rock, it is made up of the component of following weight percent:
Superfine cement: 40, flyash: 25,
Clay: 8, silica flour: 6,
Calcium hydroxide: 4 water glass: 2.
Further, the specific surface area of superfine cement is not less than 9000cm 2/ g
Further, the concentration of water glass is 35 degree Beaume-40B degree Beaume, and the modulus of water glass is 1.5-2.4.
Injecting paste material for country rock provided by the invention adds a small amount of silica flour, calcium hydroxide in superfine cement, utilizes tiny spherical silicon powder particle to be easy to be filled between cement granules, add the degree of compactness of Behavior of Hardened Cement Paste, reduce porosity; And the active SiO in silica flour 2ca (OH) can be discharged with hydrated cementitious 2, the CSH gel of Ca/Si is produced in reaction, and this gel-strength is higher than the thick and Ca of porous (OH) 2crystal, thus the intensity of slurries calculus is improved further greatly, playing the effect of dual reinforcing, simultaneously by adding a small amount of water glass, reaching the gel time shortening and control cement plasmoid humor, to improve its stability, the property noted.
Embodiment
embodiment 1:
To get the injecting paste material of 100g, it is made up of the component of following weight percent:
In the present embodiment, water glass is advisable and is built the concentration that east produces be 35Be and modulus is 2.4 water glass, and superfine cement is the ultra-fine silicate cement of 42.5# that three lion special cement company limiteds produce, specific surface area>=8000cm 2/ g, the mean particle size of silica flour close to nano level, itself and flyash, clay and Ca (OH) 2be usual production on the market.
Reference examples 2:
Same, to get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
Reference examples 3:
Same, to get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
Reference examples 4:
Same, to get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
Table 1 comparative test result
Numbering Syneresis rate/% Viscosity/S Ultimate compression strength/MPa Calculus rate/%
1 0.65 26.2 10.92 99.8
2 0.7 27 12.50 99.5
3 0.73 38.9 11.93 97.5
4 0.79 54.3 11.21 98.2
Result of implementation is as shown in table 1, wherein, by the component proportion that above-mentioned reference examples: 2-4 provides, usual method is conventionally mixed with injecting paste material, test respective performance, find after comprehensive evaluation, the best results of reference examples 2, its performance index are: intensity is 12.5MPa, viscosity is 27S, and syneresis rate 0.7%, calculus rate are up to 99.5%.And in embodiment 1, owing to adding a small amount of water glass, make the syneresis rate of slurries and viscosity be reduced to 0.65 and 26.2 further, substantially increase the mobility of slurries; Meanwhile, ultimate compression strength and the calculus rate of slurries also have further raising, improve the reinforcement performance after grout cures further.
embodiment 2:
To get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
In the present embodiment, water glass is advisable and is built the concentration that east produces be 35Be and modulus is 2.4 water glass, and superfine cement is the ultra-fine silicate cement of 42.5# that three lion special cement company limiteds produce, specific surface area>=8000cm 2/ g, the mean particle size of silica flour close to nano level, itself and flyash, clay and Ca (OH) 2be usual production on the market.
embodiment 3:
To get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
In the present embodiment, water glass is advisable and is built the concentration that east produces be 40Be and modulus is 1.5 water glass, and superfine cement is the ultra-fine silicate cement of 42.5# that three lion special cement company limiteds produce, specific surface area>=8000cm 2/ g, the mean particle size of silica flour close to nano level, itself and flyash, clay and Ca (OH) 2be usual production on the market.
embodiment 4:
To get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
In the present embodiment, water glass is advisable and is built the concentration that east produces be 38Be and modulus is 2 water glass, and superfine cement is the ultra-fine silicate cement of 42.5# that three lion special cement company limiteds produce, specific surface area>=8000cm 2/ g, the mean particle size of silica flour close to nano level, itself and flyash, clay and Ca (OH) 2be usual production on the market.
embodiment 5:
To get the injecting paste material of 100g, be made up of the component raw material of following quality proportioning:
In the present embodiment, water glass is advisable and is built the concentration that east produces be 38Be and modulus is 2 water glass, and superfine cement is the ultra-fine silicate cement of 42.5# that three lion special cement company limiteds produce, specific surface area>=8000cm 2/ g, the mean particle size of silica flour close to nano level, itself and flyash, clay and Ca (OH) 2be usual production on the market.
The injecting paste material for wall rock reinforcement antiseepage that the embodiment of the present invention provides, in superfine cement, add a small amount of silica flour, calcium hydroxide, utilize tiny spherical silicon powder particle to be easy to be filled between cement granules, add the degree of compactness of Behavior of Hardened Cement Paste, reduce porosity; And the active SiO in silica flour 2ca (OH) can be discharged with hydrated cementitious 2, the CSH gel of Ca/Si is produced in reaction, and this gel-strength is higher than the thick and Ca of porous (OH) 2crystal, thus the intensity of slurries calculus is improved further greatly, play the effect of dual reinforcing.Simultaneously by adding a small amount of water glass, reach the gel time shortening and control cement plasmoid humor, to improve its stability, the property noted.
Therefore, utilize the slurries that injecting paste material provided by the invention is made, can be injected in the fine cracks of country rock, have good stability, intensity high, serve strengthening reinforce effect; , compare with injecting paste material (such as ash cement slurry, clay cement grout and pure superfine cement slurry etc.) conventional at present, after adding a small amount of water glass, the property noted of slurries is stronger, rate of set is faster meanwhile; In addition, injecting paste material provided by the invention, the abundance of its component materials, preparation is convenient, easy and simple to handle, has extremely strong suitability.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (5)

1. for an injecting paste material for country rock, it is characterized in that: it is made up of the component of following weight percent:
Superfine cement: 20-80, flyash: 1-60,
Clay: 1-20, silica flour: 1-15,
Calcium hydroxide: 1-10 water glass: 1-5.
2. injecting paste material according to claim 1, is characterized in that: it is made up of the component of following weight percent:
Superfine cement: 20-60, flyash: 10-40,
Clay: 5-20, silica flour: 8-15,
Calcium hydroxide: 1-5 water glass: 1-3.
3. injecting paste material according to claim 1 and 2, is characterized in that: it is made up of the component of following weight percent:
Superfine cement: 55, flyash: 25,
Clay: 8, silica flour: 6,
Calcium hydroxide: 4 water glass: 2.
4. injecting paste material according to claim 1 and 2, is characterized in that: the specific surface area of superfine cement is not less than 9000cm 2/ g.
5. injecting paste material according to claim 1 and 2, is characterized in that: the concentration of water glass is 35 degree Beaume-40 degree Beaume, and the modulus of water glass is 1.5-2.4.
CN201410837227.1A 2014-12-29 2014-12-29 Grouting material for surrounding rock Pending CN104591646A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109851309A (en) * 2019-02-14 2019-06-07 淮阴工学院 A kind of carbon dioxide sequestration injecting paste material and its construction method
CN110981255A (en) * 2019-12-27 2020-04-10 中国矿业大学 Method for reinforcing porous coral aggregate
CN111072366A (en) * 2019-12-30 2020-04-28 浙江斯力柯新材料科技有限公司 Inorganic grouting material capable of stopping open water and reinforcing structure and preparation method and application thereof
CN112876192A (en) * 2021-02-05 2021-06-01 中国海洋大学 Shield wall back grouting slurry and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102757206A (en) * 2012-08-10 2012-10-31 安徽省煤田地质局第一勘探队 Mine fracture grouting material and usage method thereof
CN102838332A (en) * 2012-09-10 2012-12-26 山东建筑大学 Novel green grouting superfine cement
CN102898101A (en) * 2012-11-02 2013-01-30 浙江科技学院 Light anti-aqueous dispersion grout
CN103102128A (en) * 2013-02-05 2013-05-15 青岛宝基利工程技术咨询有限公司 Injecting paste material for underground structure water plugging and preparation method thereof
CN103214217A (en) * 2013-03-19 2013-07-24 中国矿业大学 Composite superfine cement grout slurry and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102757206A (en) * 2012-08-10 2012-10-31 安徽省煤田地质局第一勘探队 Mine fracture grouting material and usage method thereof
CN102838332A (en) * 2012-09-10 2012-12-26 山东建筑大学 Novel green grouting superfine cement
CN102898101A (en) * 2012-11-02 2013-01-30 浙江科技学院 Light anti-aqueous dispersion grout
CN103102128A (en) * 2013-02-05 2013-05-15 青岛宝基利工程技术咨询有限公司 Injecting paste material for underground structure water plugging and preparation method thereof
CN103214217A (en) * 2013-03-19 2013-07-24 中国矿业大学 Composite superfine cement grout slurry and preparation method thereof

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109851309A (en) * 2019-02-14 2019-06-07 淮阴工学院 A kind of carbon dioxide sequestration injecting paste material and its construction method
CN110981255A (en) * 2019-12-27 2020-04-10 中国矿业大学 Method for reinforcing porous coral aggregate
CN110981255B (en) * 2019-12-27 2021-11-05 中国矿业大学 Method for reinforcing porous coral aggregate
CN111072366A (en) * 2019-12-30 2020-04-28 浙江斯力柯新材料科技有限公司 Inorganic grouting material capable of stopping open water and reinforcing structure and preparation method and application thereof
CN111072366B (en) * 2019-12-30 2022-03-04 苏州佳固士新材料科技有限公司 Inorganic grouting material capable of stopping open water and reinforcing structure and preparation method and application thereof
CN112876192A (en) * 2021-02-05 2021-06-01 中国海洋大学 Shield wall back grouting slurry and preparation method thereof

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Application publication date: 20150506