CN101633836B - Quick-setting early strength cement slurry for ground pregrouting reinforcement - Google Patents
Quick-setting early strength cement slurry for ground pregrouting reinforcement Download PDFInfo
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- CN101633836B CN101633836B CN 200910091507 CN200910091507A CN101633836B CN 101633836 B CN101633836 B CN 101633836B CN 200910091507 CN200910091507 CN 200910091507 CN 200910091507 A CN200910091507 A CN 200910091507A CN 101633836 B CN101633836 B CN 101633836B
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- early strength
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Abstract
The invention discloses quick-setting early strength cement slurry for ground pregrouting reinforcement. The quick-setting early strength cement slurry for the ground pregrouting reinforcement of a coal mine shaft comprises the following components based on portion by weight: 100 portions of silicate cement, 100-150 portions of water, 5-10 portions of quick-setting additive, 1 portion of inorganic salt early strength admixture and 0.1 portion of organic amine salt early strength admixture. The quick-setting early strength cement slurry has the advantages of low initial viscosity, good fluidity, quick viscosity increment of the cement slurry, strong capability of resisting water dilution, short setting time and high strength of early aggregated masses.
Description
Technical field:
The present invention relates to the used a kind of grout of mine shaft pre-grouting from the surface technical field, and particularly a kind of coal grouting and reinforcing is used the quick-setting early strength cement slurries, is applicable to zone of weathering, weak intercalated layer and broken rock grouting and reinforcing.
Background technology:
The mine shaft pre-grouting from the surface is used for centering on before pit shaft is dug shaft location punching slip casting.Coal measure strata has tangible analysis of stratified rock mass structure characteristic, soft, hard alternate alternating layers shape structure that the rock mass of these laminate structures is usually.In the tectonic stress concentration zones, common hard formation such as short grounds such as ls and quartzose sandstone, often local broken; Flowing rock formation such as soft rock such as tonstein often has and cuts the slabbing crack of wearing it and exist, and watery is strong and rock strength is low.From the angle of engineering geology,, pit shaft need carry out effective grouting and reinforcing when passing shatter belt and weak intercalated layer, prevent to occur in the sinking shaft wall caving and cave-in accident.
The mine shaft injecting paste material mainly contains grout and clay cement grout, though clay cement grout has good stability, plastic strength is high, the low premium properties that waits of bleed rate, and its consolidating strength is low, is not suitable for reinforcing rock mass.Grout is the main raw of coal pit shaft grouting and reinforcing at present, but grout calculus rate is low, and time of coagulation is long, and early strength is low, and especially the defective of slow, the anti-water dilution capacity difference of viscosity growth is difficult to improve always.In recent years, the mine shaft slip casting degree of depth mostly surpasses km, and along with the slip casting degree of depth constantly increases, shatter belt and weak intercalated layer grouting and reinforcing also increase thereupon.
Summary of the invention:
For overcome grout time of coagulation long, viscosity increasess slowly, the deficiency of anti-water dilution capacity difference, the invention provides the cement grout of a kind of suitable shatter belt and weak intercalated layer grouting and reinforcing.This grout utilizes the physics chemical action of compound additive, and it is fast to have realized that slurry viscosity increases, and time of coagulation, short, early stage consolidating strength was high.
The technical scheme that the present invention adopted is: this colliery grouting and reinforcing comprises down component with the quick-setting early strength cement slurries, each component by weight: 100 parts of silicate cements, 100～150 parts in water, 5～10 parts of accelerating chemicalss, 1 part in inorganic salt, 0.1 part of organic amine salt hardening accelerator.
Described silicate cement is the PO.42.5 ordinary Portland cement that the Beijing Xingfa Cement Co., Ltd provides.
The selected accelerating chemicals of the present invention is a water glass, is liquid sodium silicate, modulus 2.6～3.4.Embodiment selects the degree Beaume 40 of Beijing Red Star bubble flower alkali production, the water glass of modulus 3.2 for use.Can generate a large amount of Calucium Silicate powder at once and separate out silicon dioxide colloid after mixing water glass (Na2OnSiO2) in the grout, thereby significantly improve the slurries rheological property.Its reaction formula is:
Na
2O·nSiO
2+Ca(OH)
2+mH
2O→2NaOH+CaO·nSiO
2·mH
2O
The NaOH that generates in the reaction has further promoted hydrated cementitious, the Ca of generation (OH)
2Then quickened the carrying out of reaction.Reaction is faster between water glass and the calcium hydroxide, and along with the carrying out of reaction process, plastic mass is more and more, causes slurry viscosity to increase sharply, and shorten time of coagulation, and consolidating strength is also increasingly high.
Described inorganic salt are sodium hydrogencarbonate.
Described organic amine salt hardening accelerator is triethanolamine hydrochloride, and embodiment selects the product of chemical industry ltd far away in the permanent industry in Beijing for use; Itself and sodium hydrogencarbonate form complex accelerator, promote the later stage hydrated cementitious.
The present invention has following beneficial effect: colliery of the present invention grouting and reinforcing is used the quick-setting early strength cement slurries; Fast, the anti-water dilution capacity of viscosity growth is strong, time of coagulation short, early stage consolidating strength is high; Can greatly improve slip casting effect, be applicable to detrition band and weak intercalated layer grouting and reinforcing.
Embodiment:
Following examples are respectively from the meliority of the basic physical and mechanical property of slurries, viscosity increasing law comparative illustration slurries.Measure funnel viscosity, calculus body early anti pressured intension, the Vicat apparatus of slurries and measured the time of coagulation of slurries, the viscosity time variation equation of NXS-11A type rotary viscosity measuring slurries.
Embodiment 1,
The colliery grouting and reinforcing of present embodiment is made up of following component with the quick-setting early strength cement slurries: PO.4.25 ordinary Portland cement 100kg, water 100kg, water glass 5kg, sodium hydrogencarbonate 1kg, triethanolamine hydrochloride 0.1kg.
The cement grout presetting period of present embodiment is 5.2h, and final setting time is 6.4h.
Measure the early anti pressured intension of slurries, seen table 1.
Slurries early anti pressured intension table table 1
Can be found out that by table 1 the slurries early strength obviously improves, can reach 0.2MPa in 7h calculus body ultimate compression strength, 12h ultimate compression strength reaches more than the 3.3MPa.
Weak intercalated layer and shatter belt often germinal layer facial cleft crack, construct big crack, watery is strong and groundwater velocity is fast, so the anti-water dilution capacity of slurries just determines consolidation effect.The anti-water dilution capacity of slurries is by its viscosity rate of rise decision, and then the anti-water-dispersion ability of slurries is strong soon in the viscosity growth.
The initial funnel viscosity of slurries is 34s, has good flowability; In order further to characterize the slurry viscosity increasing law, use NXS-11A type rotational viscosimeter, systematically measured the slurry viscosity time variation, test result is seen table 2.
Viscosity time variation table with test results 2
| Time (min) | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 |
| Rotational viscosimeter reading (lattice) | 19.2 | 20.4 | 21.8 | 24.6 | 29 | 32.2 | 35.8 | 37.2 |
| AV η A(mPa·s) | 384 | 408 | 436 | 492 | 580 | 644 | 716 | 744 |
| Time (min) | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 |
| Rotational viscosimeter reading (lattice) | 38.6 | 39 | 42.8 | 46.4 | 49.2 | 56.2 | 60.6 | 63.8 |
| AV η A(mPa·s) | 772 | 780 | 856 | 928 | 984 | 1124 | 1212 | 1276 |
Remarks: 1) B system
Embodiment 2,
The coal grouting and reinforcing of present embodiment is made up of following component with the quick-setting early strength cement slurries: PO.42.5 ordinary Portland cement 100kg, water 150kg, water glass 10kg, sodium hydrogencarbonate 1kg, triethanolamine hydrochloride 0.1kg.
The cement grout presetting period of present embodiment is 5.6h, and final setting time is 6.9h.
Measure the early anti pressured intension of slurries, seen table 3.
Slurries early anti pressured intension table table 3
Can be found out that by table 3 the slurries early strength obviously improves, can reach 0.27MPa in 8h calculus body ultimate compression strength, 12h ultimate compression strength reaches more than the 2.5MPa.
The initial funnel viscosity 32s of slurries, good fluidity.Systematically tested the slurry viscosity time variation, test result is seen table 4.
Slurry viscosity time variation table with test results 4
| Time (min) | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 |
| Rotational viscosimeter reading (lattice) | 22.2 | 22.8 | 23.6 | 25 | 27.8 | 29.6 | 31 | 31.4 |
| AV η A(mPa·s) | 444 | 448 | 472 | 500 | 556 | 592 | 620 | 628 |
| Time (min) | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 |
| Rotational viscosimeter reading (lattice) | 32.6 | 34 | 35.4 | 36.8 | 39.2 | 41.4 | 42.8 | 44.8 |
| AV η A(mPa·s) | 652 | 680 | 708 | 736 | 784 | 828 | 856 | 896 |
Remarks: 1) B system
Comparative Examples 1,
The mine shaft grouting grout of this Comparative Examples is made up of following component: PO.42.5 ordinary Portland cement 100kg, water 100kg.
The cement grout presetting period of present embodiment is 15.5h, and final setting time is 18h.The slurry viscosity increasing law is seen table 5.
Slurry viscosity time variation table with test results 5
| Time (min) | 0 | 5 | 10 | 15 | 20 | 25 | 30 | 35 |
| Rotational viscosimeter reading (lattice) | 25.2 | 25.6 | 26.4 | 27 | 28.4 | 29.2 | 30.2 | 31 |
| AV η A(mPa·s) | 50.4 | 51.2 | 52.8 | 54 | 56.8 | 58.4 | 60.4 | 62 |
| Time (min) | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 |
| Rotational viscosimeter reading (lattice) | 32.2 | 33 | 34.2 | 35.4 | 37 | 38.4 | 40.2 | 42 |
| AV η A(mPa·s) | 64.4 | 66 | 68.4 | 70.8 | 74 | 76.8 | 80.4 | 84 |
Remarks: 1) A system
Comparative Examples 2,
The mine shaft grouting grout of this Comparative Examples is made up of following component: PO.42.5 ordinary Portland cement 100kg, water 150kg.
The cement grout presetting period of this Comparative Examples is 19.5h, and final setting time is 25h.Calculus body 24h does not have the pressure resistance degree.
This Comparative Examples wc is high, and slurries are extremely unsettled suspension system, so slurry stream sex change test result is unstable; The overall test result, viscosity does not increase basically.
Claims (1)
1. a mine shaft pre-grouting from the surface is reinforced and is used the quick-setting early strength cement slurries; It is characterized in that: comprise following component, each component by weight: 100 parts of silicate cements, 100～150 parts in water, 5～10 parts of accelerating chemicalss, 1 part of inorganic salt hardening accelerator, 0.1 part of organic amine salt hardening accelerator; Wherein silicate cement is the P.O42.5 ordinary Portland cement; Accelerating chemicals is a water glass; Inorganic salt are sodium hydrogencarbonate; Organic amine salt hardening accelerator is triethanolamine hydrochloride.
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| CN101633836B true CN101633836B (en) | 2012-10-31 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775109A (en) * | 2012-07-18 | 2012-11-14 | 上海大学 | Preparation method of hydrophilic-group nano SiO2 composite quick-setting cement grout |
| CN103571445B (en) * | 2012-08-09 | 2016-11-02 | 中国石油天然气股份有限公司 | A kind of silicate plugging agent for oil-well water plugging and using method thereof |
| 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 |
| CN104386976A (en) * | 2014-10-13 | 2015-03-04 | 中铁二院重庆勘察设计研究院有限责任公司 | Modified accelerator and composite quick-setting cement slurry with easy-to-control viscosity, and preparation method thereof |
| CN108249845A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of Organic-inorganic composite early strength agent and the self-compacting concrete prepared using the early strength agent |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050091A (en) * | 2007-04-29 | 2007-10-10 | 常州工学院 | Slurry of modified Portland cement in use for anchoring engineering, and application |
| WO2007125311A1 (en) * | 2006-04-25 | 2007-11-08 | Minova International Limited | Cement-containing compositions and method of use |
| 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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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007125311A1 (en) * | 2006-04-25 | 2007-11-08 | Minova International Limited | Cement-containing compositions and method of use |
| 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 |
| CN101050091A (en) * | 2007-04-29 | 2007-10-10 | 常州工学院 | Slurry of modified Portland cement in use for anchoring engineering, and application |
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