CN101628800B - Early strength cement grout with low dehydration ratio for grouting - Google Patents
Early strength cement grout with low dehydration ratio for grouting Download PDFInfo
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- CN101628800B CN101628800B CN2009100914596A CN200910091459A CN101628800B CN 101628800 B CN101628800 B CN 101628800B CN 2009100914596 A CN2009100914596 A CN 2009100914596A CN 200910091459 A CN200910091459 A CN 200910091459A CN 101628800 B CN101628800 B CN 101628800B
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Abstract
The invention discloses early strength cement grout with low dehydration ratio for grouting. The stable early strength cement grout for pre-grouting of coal mineshaft surface comprises the following components in part by weight: 100 parts of silicate cement, 80-120 parts of water, 10-40 parts of suspending agent, 1 part of inorganic sodium salt and 0.03-0.1 part of organic alcohol early strength agent. The cement grout utilizes physical and chemical functions of composite admixture, improves the suspending stability of the cement grout and the early compression strength of a concretion body, improves the flow deformation feature and the movable shearing force of the grout and realizes controllable grout diffusion distance.
Description
Technical field:
The present invention relates to the used a kind of grout in the pre-slurry injection technique of coal wellbore surface field, and particularly a kind of early strength cement grout with low dehydration ratio for grouting is applicable to the grouting and reinforcing and the water blockoff of bedrock weathering zone and distributed fault.
Background technology:
In the mine shaft pre-grouting from the surface engineering, bedrock weathering zone and fault belt need grouting and reinforcing and water blockoff to improve its engineering geology and hydrogeological conditions, prevent to occur in the sinking shaft wall caving and cave-in accident.Cement based slurries reinforcement performance is good, adopts the injecting paste material of grout as bedrock weathering zone and fault belt in the pre-Grouting engineering of old place face always.The coal pit shaft slip casting degree of depth has reached km mostly at present, for pumpability that guarantees slurries and the property annotated, the general high water-cement ratio grout grouting and reinforcing that adopts, high water-cement ratio has guaranteed the property annotated of slurries, but has also brought many disadvantageous effects to mortar depositing construction simultaneously.
Use at present single liquid grout to mainly contain two difficulties at bedrock weathering zone and fault belt grouting and reinforcing and water blockoff: the tomography waterstop inhales that the slurry amount is little, and single liquid grout suspension stability is poor, and the sedimentation bleed often causes slip casting to be failed in boring; Tomography water guide band and zone of weathering suction slurry amount are big, because the diffusion length of single liquid grout is wayward, " run slurry " easily and " emitting slurry " in the slip casting process, also are difficult to reach the slip casting ending standard even inject a large amount of slurries, and slip casting effect is very difficult to be guaranteed.This shows that single liquid grout is not effective injecting paste material of handling distributed fault and zone of weathering, shows that mainly the slurries suspension stability is poor, diffusion length is uncontrollable.Drawbacks such as engineering practice in recent years shows, single liquid grout poor stability, diffusion length are uncontrollable have become an important factor of restriction deep-well grouting quality and slip casting efficient.
The problems referred to above forefathers that exist at single liquid grout have adopted multiple modified measures, but all are the one-sided performances of improving slurries, but never develop the compound additive of the single liquid cement slurry property of comprehensive adjustment.As mix the stability that wilkinite improves slurries, but wilkinite has significantly reduced slurry fluidity, and slurry fluidity and this contradiction of stability are difficult to regulate; Simultaneously the slurries presetting period long, slurries calculus intensity is low, volume drying shrinkage, poor durability behind the setting and harden.As mix the early strength that sodium-chlor and trolamine improve slurries, but the slurries of preparation still are unstable slurries, anti-water dilution capacity is poor, slurries are not that full section advances the filling crack in the slip casting process, but the deposition naturally of dependence cement granules is with water blockoff, sodium-chlor and trolamine are difficult to play a role, so the diffusion length of slurries is still uncontrollable, and early strength is improved also not obvious.Along with mine shaft depth constantly increases, distributed fault and zone of weathering grouting and reinforcing and water blockoff also increase thereupon.
Summary of the invention:
In order to overcome single liquid grout suspension stability difference and the uncontrollable deficiency of diffusion length, the invention provides a kind of complex cement slurries that adapt to distributed fault and bedrock weathering zone hydrogeological characteristics.This grout utilizes the physics chemical action of compound additive, has improved the suspension stability of grout and the early anti pressured intension of calculus body; Improved the rheological characteristics of slurries, improved the yield value of slurries, realized that slurries diffusion length is controlled.
The technical solution adopted in the present invention is: this early strength cement grout with low dehydration ratio for grouting comprises down component, each component by weight: 100 parts of silicate cements, 80～120 parts in water, 10～40 parts of suspension agents, 1 part of inorganic sodium, 0.03～0.1 part of organic alcohols hardening accelerator.
Described silicate cement is No. 425 ordinary Portland cements that the Beijing Xingfa Cement Co., Ltd produces.
The selected suspension agent of the present invention is a silicon sol, and silicon sol belongs to colloidal solution, and molecular formula is mSiO
2NH
2O.Silicon sol is provided by Beijing Red Star spacious mansion chemical building material limited liability company, and model is 2030.Mix behind the silicon sol Ca (OH) that produces can be at once with hydrated cementitious the time in the silicon sol grout
2Kickback takes place, generate a large amount of Calucium Silicate powder and separate out silicon dioxide colloid, because colloidal particle fine (10-20nm), sizable specific surface area is arranged, thereby its adsorptivity has been set up a kind of flucculation structure by force, can significantly improve the suspension stability of slurries, slurries bleed rate is reduced to 5% by 58% during water cement ratio 2.So it is slurries mainly are that the reaction of silicon sol and calcium hydroxide plays a major role in the early stage, also bigger to the influence of slurries rheological property.
Described inorganic sodium is a yellow soda ash.
Described organic alcohols hardening accelerator is poly hydramine, tri-isopropanolamine or diethanolamine, and itself and yellow soda ash form complex accelerator, promote the later stage hydrated cementitious.
A key character of the present invention is that suspension agent and complex accelerator have good consistency, early stage, silicon sol was set up flucculation structure fast, guaranteed the suspension stability of slurries, improved the anti-water dilution capacity of slurries, provide architecture basics for complex accelerator plays a role.Therefore, early stage, silicon sol was bigger to the hydrated cementitious history effect, and complex accelerator mainly is to have promoted the hydration reaction of cement own in the later stage.In a word, the aquation course of suspension agent and complex accelerator acting in conjunction remarkably influenced cement, and then improved suspension stability, rheological property and the early stage ultimate compression strength of slurries.
The present invention has following beneficial effect: early strength cement grout with low dehydration ratio for grouting liquid suspension stability of the present invention is good, diffusion length is controlled, early strength is high, has good flowability simultaneously.Slurries pressure loss in diffusion is big, and the diffusion radius can effectively be controlled, and is applicable to the big crack of structure and bedrock weathering zone grouting and reinforcing and water blockoff.
Embodiment:
Following examples illustrate the superiority of slurries respectively from the basic physical and mechanical property of slurries, slurries aquation course, rheological property.The time of coagulation, the hydration heat analyser that use the 100mL graduated cylinder to measure the bleed rate of slurries, Vicat apparatus measurement slurries are measured the hydration heat temperature rise curve of slurries, the rheological property of NXS-11A type rotary viscosity measuring slurries.
Embodiment 1,
The coal pit shaft early strength cement grout with low dehydration ratio for grouting of present embodiment is made up of following component: No. 425 ordinary Portland cement 100kg, water 80kg, silicon sol 10kg, yellow soda ash 1kg, diethanolamine 0.03kg.
The cement grout bleed rate of present embodiment is 0, and the presetting period is 4.5h, and final setting time is 5.4h.
In order further to characterize epistasis energy morning of slurries, measured hour ultimate compression strength of slurries calculus body.Experimental result sees Table 1.
Slurries early anti pressured intension table table 1
As can be seen from Table 1, the slurries early strength obviously improves, and can reach 0.32MPa in 6h calculus body ultimate compression strength, and 12h ultimate compression strength reaches more than the 3.5MPa.
The adding of admixture has a significant effect to the hydrated cementitious course, and what of hydrated cementitious thermal discharge have positive connection with the extent of hydration of cement.Adopt the automatic hydrating heat measuring instrument of multichannel high-efficient,, analyze the influence of compound additive slurries aquation course by the hydration heat temperature rise curve of online acquisition slurries.
Experimental result shows, after three kinds of admixtures are mixed again, has significantly promoted the hydrated cementitious course of slurries, and compound back hydration heat peak of curve time of occurrence significantly shifts to an earlier date, 10.8h only, and the hydrated cementitious peak value is 43.5 ℃.
The geological condition of being annotated rock mass is an outwardness, and the diffusion length of controlling slurries by the rheological property of adjusting injecting paste material is the most effective means so.Use the NXS-11A type rotational viscosimeter that Chengdu Instruement Factory produces, systematically studied the slurries flow pattern, test result sees Table 2.
Slurries rheology testing data table table 2
| The rotating speed shelves | Reading/lattice | γ | τ | The rotating speed shelves | Reading/lattice | γ | τ |
| 1 | 17.2 | 3.178 | 9.761 | 9 | 28.4 | 36.89 | 16.117 |
| 2 | 18 | 4.313 | 10.215 | 10 | 31 | 51.88 | 17.593 |
| 3 | 19 | 5.675 | 10.783 | 11 | 32.4 | 63.56 | 18.387 |
| 4 | 19.8 | 7.387 | 11.237 | 12 | 35.2 | 86.26 | 19.976 |
| 5 | 21 | 10.22 | 11.918 | 13 | 39.2 | 113.5 | 22.246 |
| 6 | 23.4 | 15.89 | 13.280 | 14 | 42.2 | 147.6 | 23.949 |
| 7 | 25.2 | 21.57 | 14.301 | 15 | 48.6 | 204.3 | 27.581 |
| 8 | 27.2 | 28.38 | 15.436 |
Remarks: 1) B system
Above data are carried out match, and its rheological equation is: τ=11.54+0.087 γ, related system r=0.97086 draws the initial yield value τ of slurries
0=11.54Pa, plastic viscosity η=87mPas.
Embodiment 2,
The coal pit shaft early strength cement grout with low dehydration ratio for grouting of present embodiment is made up of following component: No. 425 ordinary Portland cement 100kg, water 80kg, silicon sol 12kg, yellow soda ash 1kg, tri-isopropanolamine 0.08kg.
The cement grout bleed rate of present embodiment is 0%, and the presetting period is 4.3h, and final setting time is 5.2h.
In order further to characterize epistasis energy morning of slurries, measured hour ultimate compression strength of slurries calculus body.Experimental result sees Table 3.
Slurries early anti pressured intension table table 3
As can be seen from Table 3, the slurries early strength obviously improves, and can reach 0.4MPa in 6h calculus body ultimate compression strength, and 12h ultimate compression strength reaches more than the 3.8MPa.
The hydration heat temperature rise curve result of online acquisition slurries shows that hydration heat peak of curve time of occurrence significantly shifts to an earlier date, 10.2h only, and the hydrated cementitious peak value is 44.75 ℃.
Use the NXS-11A type rotational viscosimeter that Chengdu Instruement Factory produces, systematically studied the slurries flow pattern, test result sees Table 4.
Slurries rheology testing data table table 4
| The rotating speed shelves | Reading/lattice | γ | τ | The rotating speed shelves | Reading/lattice | γ | τ |
| 1 | 17.9 | 3.178 | 10.158 | 9 | 28.1 | 36.89 | 15.947 |
| 2 | 18.1 | 4.313 | 10.272 | 10 | 31.5 | 51.88 | 17.876 |
| 3 | 19.2 | 5.675 | 10.896 | 11 | 32.2 | 63.56 | 18.274 |
| 4 | 20.1 | 7.387 | 11.407 | 12 | 35.5 | 86.26 | 20.146 |
| 5 | 21.2 | 10.22 | 12.031 | 13 | 39.3 | 113.5 | 22.303 |
| 6 | 23.1 | 15.89 | 13.109 | 14 | 41.9 | 147.6 | 23.778 |
| 7 | 24.9 | 21.57 | 14.131 | 15 | 48.3 | 204.3 | 27.410 |
| 8 | 27.3 | 28.38 | 15.493 |
Remarks: 1) B system
Above data are carried out match, and its rheological equation is: τ=11.64+0.086 γ, related system r=0.97147 draws the initial yield value τ of slurries
0=11.64Pa, plastic viscosity η=86mPas.
Embodiment 3,
The coal pit shaft early strength cement grout with low dehydration ratio for grouting of present embodiment is made up of following component: No. 425 ordinary Portland cement 100kg, water 100kg, silicon sol 36kg, yellow soda ash 1kg, diethanolamine 0.06kg.
The cement grout bleed rate of present embodiment is 1%, and the presetting period is 5.3h, and final setting time is 5.8h.
In order further to characterize epistasis energy morning of slurries, measured hour ultimate compression strength of slurries calculus body.Experimental result sees Table 5.
Slurries early anti pressured intension table table 5
As can be seen from Table 5, the slurries early strength obviously improves, and can reach 0.2MPa in 6h calculus body ultimate compression strength, and 12h ultimate compression strength reaches more than the 3.5MPa.
The hydration heat temperature rise curve experimental result of online acquisition slurries shows that hydration heat peak of curve time of occurrence significantly shifts to an earlier date, 10.8h only, and the hydrated cementitious peak value is 43.85 ℃.
Use the NXS-11A type rotational viscosimeter that Chengdu Instruement Factory produces, systematically studied the slurries flow pattern, test result sees Table 6.
Slurries rheology testing data table table 6
| The rotating speed shelves | Reading/lattice | γ | τ | The rotating speed shelves | Reading/lattice | γ | τ |
| 1 | 16.4 | 3.178 | 9.307 | 9 | 21 | 36.89 | 11.918 |
| 2 | 17.2 | 4.313 | 9.761 | 10 | 21.8 | 51.88 | 12.372 |
| 3 | 17.8 | 5.675 | 10.102 | 11 | 22 | 63.56 | 12.485 |
| 4 | 18.2 | 7.387 | 10.329 | 12 | 23 | 86.26 | 13.053 |
| 5 | 18.6 | 10.22 | 10.556 | 13 | 24 | 113.5 | 13.620 |
| 6 | 19 | 15.89 | 10.783 | 14 | 25.4 | 147.6 | 14.415 |
| 7 | 19.6 | 21.57 | 11.123 | 15 | 27.2 | 204.3 | 15.436 |
| 8 | 20 | 28.38 | 11.350 |
Remarks: 1) reference cement 2) the B system
Above data are carried out match, and its rheological equation is: τ=10.26+0.028 γ, related system r=0.96291 draws the initial yield value τ of slurries
0=10.26Pa, plastic viscosity η=28mPas.
Embodiment 4,
The coal pit shaft early strength cement grout with low dehydration ratio for grouting of present embodiment is made up of following component: No. 425 ordinary Portland cement 100kg, water 100kg, silicon sol 40kg, yellow soda ash 1.5kg, poly hydramine 0.1kg.
The cement grout bleed rate of present embodiment is 0%, and the presetting period is 5.1h, and final setting time is 5.8h.
In order further to characterize epistasis energy morning of slurries, measured hour ultimate compression strength of slurries calculus body.Experimental result sees Table 7.
Slurries early anti pressured intension table table 7
As can be seen from Table 7, the slurries early strength obviously improves, and can reach 0.3MPa in 6h calculus body ultimate compression strength, and 12h ultimate compression strength reaches more than the 3.9MPa.
Hydration heat temperature rise curve experimental result by the online acquisition slurries shows that hydration heat peak of curve time of occurrence significantly shifts to an earlier date, 10.4h only, and the hydrated cementitious peak value is 44.2 ℃.
Use the NXS-11A type rotational viscosimeter that Chengdu Instruement Factory produces, systematically studied the slurries flow pattern, test result sees Table 8.
Slurries rheology testing data table table 8
| The rotating speed shelves | Reading/lattice | γ | τ | The rotating speed shelves | Reading/lattice | γ | τ |
| 1 | 17.4 | 3.178 | 9.875 | 9 | 21.3 | 36.89 | 12.088 |
| 2 | 17.9 | 4.313 | 10.158 | 10 | 21.9 | 51.88 | 12.428 |
| 3 | 18.1 | 5.675 | 10.272 | 11 | 22.8 | 63.56 | 12.939 |
| 4 | 18.5 | 7.387 | 10.499 | 12 | 24.1 | 86.26 | 13.677 |
| 5 | 19.1 | 10.22 | 10.839 | 13 | 25.6 | 113.5 | 14.528 |
| 6 | 19.4 | 15.89 | 11.010 | 14 | 26.9 | 147.6 | 15.266 |
| 7 | 19.8 | 21.57 | 11.237 | 15 | 27.4 | 204.3 | 15.550 |
| 8 | 20.9 | 28.38 | 11.861 |
Remarks: 1) B system
Above data are carried out match, and its rheological equation is: τ=10.55+0.030 γ, related system r=0.96012 draws the initial yield value τ of slurries
0=10.55Pa, plastic viscosity η=30mPas.
Comparative Examples 1,
The coal pit shaft grouting list liquid grout of this Comparative Examples is made up of following component: No. 425 ordinary Portland cement 100kg, water 80kg.
The cement grout bleed rate of present embodiment is 7%, and the presetting period is 11h, and final setting time is 14h.
Slurry water heat-transmission peak of curve time of occurrence is 18.6h, and the hydrated cementitious peak value is 35.4 ℃.Slurries yield strength 4.16Pa, plastic viscosity 3.1mPas.
Comparative Examples 2,
The coal pit shaft grouting list liquid grout of this Comparative Examples is made up of following component: No. 425 ordinary Portland cement 100kg, water 100kg.
The cement grout bleed rate of present embodiment is 18%, and the presetting period is 15.5h, and final setting time is 18h.
Slurry water heat-transmission peak of curve time of occurrence is 21.6h, and the hydrated cementitious peak value is 33 ℃.Slurries yield strength 3.96Pa, plastic viscosity 2.7mPas.
Claims (1)
1. early strength cement grout with low dehydration ratio for grouting, it is characterized in that: comprise down component, each component by weight: 100 parts of silicate cements, 80～120 parts in water, 10～40 parts of suspension agents, 1 part of inorganic sodium, 0.03～0.1 part of organic alcohols hardening accelerator; Described silicate cement is No. 425 ordinary Portland cements; Described suspension agent is a silicon sol; Described inorganic sodium is a yellow soda ash; Described organic alcohols hardening accelerator is tri-isopropanolamine, diethanolamine or poly hydramine.
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| CN102001847B (en) * | 2010-10-21 | 2013-01-16 | 山东大学 | Paste quick-setting grouting material and preparation method thereof |
| CN102093000A (en) * | 2010-12-10 | 2011-06-15 | 浙江工业大学 | CRTS II type slab ballastless track cement asphalt (CA) mortar |
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| CN102531443B (en) * | 2010-12-13 | 2013-09-25 | 中联煤层气有限责任公司 | Early strength agent composition and preparation method thereof, cement composition and uses of above |
| CN103833294B (en) * | 2013-11-07 | 2016-03-16 | 北京中煤矿山工程有限公司 | The single liquid stabilizing cement based slurries of a kind of km deep level roadway rock reinforce |
| CN105367016B (en) * | 2014-08-25 | 2018-10-23 | 鹤岗市新智科技有限公司 | A kind of adjustable ungauged regions grouting slurries of performance and its preparation method |
| CN104724993B (en) * | 2015-03-19 | 2016-08-17 | 济南大学 | A kind of high dispersive higher suspension high permeable cement slurry and preparation method thereof |
| CN106477926B (en) * | 2016-10-11 | 2019-01-04 | 武汉科技大学 | A kind of cement slurry and preparation method thereof that rheological characteristic is controllable |
| CN107746239A (en) * | 2017-10-16 | 2018-03-02 | 孙建忠 | A kind of preparation method of high bond strength cement mortar |
| CN108373336A (en) * | 2018-02-27 | 2018-08-07 | 浙江正豪耐火材料股份有限公司 | A kind of wear-resistant castable and preparation method thereof that efficiently flows automatically |
| CN109400065A (en) * | 2018-11-22 | 2019-03-01 | 中铁第勘察设计院集团有限公司 | The preparation method of single control cement slurry for karst foundation slip casting |
| CN116004201A (en) * | 2021-10-21 | 2023-04-25 | 中国石油化工股份有限公司 | High Wen Cai-resistant liquid sediment profile control water shutoff agent and preparation method thereof |
| CN115536324A (en) * | 2022-10-21 | 2022-12-30 | 河海大学 | High-content waste sand wall post-grouting material and grouting method |
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| CN1356285A (en) * | 2000-12-06 | 2002-07-03 | 高京林 | Fast-hardening expendable grout for emergency construction |
| CN101126018A (en) * | 2006-08-15 | 2008-02-20 | 中国石油天然气集团公司 | Low-temperature hardening scurry-proof cement slurry for well cementing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356285A (en) * | 2000-12-06 | 2002-07-03 | 高京林 | Fast-hardening expendable grout for emergency construction |
| CN101126018A (en) * | 2006-08-15 | 2008-02-20 | 中国石油天然气集团公司 | Low-temperature hardening scurry-proof cement slurry for well cementing |
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