CN103387368A - Ultralow-temperature gelling spray material - Google Patents
Ultralow-temperature gelling spray material Download PDFInfo
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- CN103387368A CN103387368A CN2013103335106A CN201310333510A CN103387368A CN 103387368 A CN103387368 A CN 103387368A CN 2013103335106 A CN2013103335106 A CN 2013103335106A CN 201310333510 A CN201310333510 A CN 201310333510A CN 103387368 A CN103387368 A CN 103387368A
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- China
- Prior art keywords
- cao
- gelling
- grog
- low temperature
- temperature gelling
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Abstract
The invention discloses an ultralow-temperature gelling spray material. The ultralow-temperature gelling spray material is prepared through preparing a gelling material master batch through co-grinding C3S-C2S-C4A3S<->-CaO which serves as a main mineral clinker, gypsum and industrial tailings, then adding fine sand and fine stone, and mixing with water. The C3S-C2S-C4A3S<->-CaO serving as the main mineral clinker is prepared through introducing excessive CaO into a cement crude material of a CaO-SiO2-Al2O3-Fe2O3-SO3 five-component system, enabling the content b-CaO of the excessive CaO to be 5-8%, controlling an alkalinity coefficient Km to be 1.0-1.3, and calcining at the temperature of 1,200-1,300 DEG C. The ultralow-temperature gelling spray material has the beneficial effects that the ultralow-temperature gelling spray material is prepared in a manner that the C3S-C2S-C4A3S<->-CaO is adopted as the main mineral clinker, the setting time of the gelling spray material is not longer than 5 minutes, the compressive resistance is 35-45 MPa, and the cementing strength is 1.5-3.5 MPa. The ultralow-temperature gelling spray material is particularly applicable to tunnel support and slope protection control.
Description
Technical field
The present invention designs a kind of building cementing material, specifically a kind of very low temperature gelling blasting materials.
Background technology
Traditional winter executes spraying technique and often adopts OPC cement to add frostproofer, air entrapment agent, accelerating chemicals etc. to reach and reduce the liquid phase freezing point temperature, shorten time of coagulation, improve freezing tolerance and obtain early strength, but in the situation that-30 ℃ of very low temperature, because the hydration and hardening of Portland cement is slow, resist the ability extreme difference of very low temperature freeze injury, must add a large amount of antifreeze air entrapment agents, antifreeze and do not strengthen, fast solidifying and unhappy hard, the concrete bubble is many, impervious poor, therefore concrete later strength and weather resistance decrease.Normal occur cracking, crisp broken, peel off, emit water, seepage, extension ice, the tunnel defects such as moist, greatly affect construction quality.
For example: under central development of the West Regions decision-making, large quantities of engineering projects enter western part.Highway, railway, bridge, riverbed, hillside all need to build to be administered.The state key project financing the Qinghai-Tibet Railway need pass through 547 kilometers eternal frozen ground locations for many years, the Frozen Earth Railway Roadbed that dewaters is solidified, the broken section of the nearly 5000m of height above sea level along the line, weathered rock formation, richness (satisfy) ice soil property, landslide etc. all need outside supporting processes, the urgent need very low temperature slip casting of water frozen soil layer tunnel, injection that two total lengths are 3024 meters.Yet traditional material and Dong Shi technology can not meet the construction requirement of severe cold area fully, such as tooth timberline, tender timberline, the weak line in south etc., permafrost soil layer, Nan Han tunnel are due to the weather severe cold, general cracking in tunnel, crisp broken, peel off, hang ice, emit water, ponding, the tunnel defect such as icing, serious threat owner of a trading company or a workshop safety and work-ing life, maintenance work is heavy, administers very difficult.This is mainly because temperature is low, and the concrete Microstructure Fracture, due to infiltration, Chen Rong vicious cycle etc.
Summary of the invention
The purpose of this invention is to provide a kind of very low temperature gelling blasting materials, be appropriate to cement jet, anchor, prop up, protect in very low temperature winter construction journey.
Technical scheme of the present invention is achieved in that a kind of very low temperature gelling blasting materials, with C
3S-C
2S-
-CaO is that essential mineral grog, gypsum, industrial tailings intergrinding are made the gelling material masterbatch, then adds fineness fine sand and microlith and water mixing preparation to form.
The method for making of masterbatch has two kinds, method 1: with C
3S-C
2S-
-CaO is essential mineral grog 30～50%, gypsum 5～15% and industrial tailings 15～70%.Method 2: add CAS grog, OPC grog to be mixed, proportioning is: with C
3S-C
2S-
-CaO is essential mineral grog 10～15%, CAS grog 15～25%, OPC grog 5～10%, gypsum 5～15% and industrial tailings 15～70%.
The ratio of grog and fine sand microlith is: described 1 part of gelling material adds the microlith of 2～3 parts of fine sands and 2～3 parts.Described fine sand is fineness modulus M
KThe medium coarse sand of=2.5 left and right or CHARACTERISTICS OF TAILINGS SAND.The water cement ratio of whole sandblast mortar is 0.4～0.6, and the size of water cement ratio is the key of combined bolting and shotcrete operating technique, and too little dust is many, and too greatly resilience is large, intensity is low.
When carrying out grinding, grog controls specific surface area at 4500～5500cm
2Between/g or fineness 4900 hole sizers tail over below 5%.
With C
3S-C
2S-
-CaO is that the essential mineral grog is at CaO-SiO
2-Al
2O
3-Fe
2O
3-SO
3In the cement slurry of quinary system, excess has been introduced CaO, and the content of excessive oxidation calcium between b-CaO=5～8%, is controlled in basicity factor Km=1.0～1.3 scopes, and grog is made in calcining under the firing temperature of 1200 ℃～1300 ℃.
Beneficial effect of the present invention is: very low temperature of the present invention sprays gelling material to be adopted with C
3S-C
2S-
-CaO is that essential mineral grog configuration forms, the gelling sand-blast material time of coagulation≤5 minute, between ultimate compression strength=35～45Mpa, cohesive strength=1.5～3.5Mpa.Be particularly suitable for tunnel support, bank protection improvement.
Embodiment
Below in conjunction with specific embodiment, the present invention is further explained explanation.
1 one kinds of very low temperature gelling blasting materials of embodiment, C
3S-C
2S-
-CaO is that essential mineral grog 30%, gypsum 10% and industrial tailings 60% intergrinding are made the gelling material masterbatch, wherein, controls specific surface area during grinding at 4500～5500cm
2Between/g.Then the ratio according to the microlith of 1 part of gelling material+2 part fine sand+2 parts adds fineness modulus M
KThe medium coarse sand of=2.5 left and right mixes, and allocates after adding water, wherein adds the water yield to guarantee that water cement ratio (W/C) is between 0.4～0.6.
With C
3S-C
2S-
-CaO is that the method for making of essential mineral grog is: be at CaO-SiO
2-Al
2O
3-Fe
2O
3-SO
3In the cement slurry of quinary system, excess has been introduced CaO, and the content of excessive oxidation calcium between b-CaO=5～8%, is controlled in basicity factor Km=1.0～1.3 scopes, and grog is made in calcining under the firing temperature of 1200 ℃～1300 ℃.
2 one kinds of very low temperature of embodiment spray gelling material, with C
3S-C
2S-
-CaO be essential mineral grog 15%, CAS grog 25%, OPC grog 10%, gypsum 5% and industrial tailings 45% wherein, control specific surface area during grinding at 4500～5500cm
2Between/g.Then the ratio according to the microlith of 1 part of gelling material+3 part fine sand+3 parts adds fineness modulus M
KThe medium coarse sand of=2.5 left and right mixes, and allocates after adding water, wherein adds the water yield to guarantee that water cement ratio (W/C) is between 0.4～0.6.
With C
3S-C
2S-
-CaO is that the method for making of essential mineral grog is: be at CaO-SiO
2-Al
2O
3-Fe
2O
3-SO
3In the cement slurry of quinary system, excess has been introduced CaO, and the content of excessive oxidation calcium between b-CaO=5～8%, is controlled in basicity factor Km=1.0～1.3 scopes, and grog is made in calcining under the firing temperature of 1200 ℃～1300 ℃.
The above; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. a very low temperature gelling blasting materials, is characterized in that, with C
3S-C
2S-
-CaO is that essential mineral grog, gypsum, industrial tailings intergrinding are made the gelling material masterbatch, then adds fineness fine sand and microlith and water mixing preparation to form.
2. very low temperature gelling blasting materials according to claim 1, is characterized in that, with C
3S-C
2S-
-CaO is essential mineral grog 30～50%, gypsum 5～15% and industrial tailings 15～70%.
3. very low temperature gelling blasting materials according to claim 1, is characterized in that, adds CAS grog, OPC grog to be mixed, and proportioning is: with C
3S-C
2S-
-CaO is essential mineral grog 10～15%, CAS grog 15～25%, OPC grog 5～10%, gypsum 5～15% and industrial tailings 15～70%.
4. very low temperature gelling blasting materials according to claim 1, is characterized in that, described 1 part of gelling material adds the microlith of 2～3 parts of fine sands and 2～3 parts.
5. very low temperature gelling blasting materials according to claim 1, is characterized in that, described fine sand is fineness modulus M
KThe medium coarse sand of=2.5 left and right or CHARACTERISTICS OF TAILINGS SAND.
6. very low temperature gelling blasting materials according to claim 1, is characterized in that, water cement ratio is 0.4～0.6.
7. very low temperature gelling blasting materials according to claim 1, is characterized in that, controls specific surface area during grinding at 4500～5500cm
2Between/g or fineness 4900 hole sizers tail over below 5%.
8. very low temperature gelling blasting materials according to claim 1, is characterized in that, with C
3S-C
2S-
-CaO is that the essential mineral grog is at CaO-SiO
2-Al
2O
3-Fe
2O
3-SO
3In the cement slurry of quinary system, excess has been introduced CaO, and the content of excessive oxidation calcium between b-CaO=5～8%, is controlled in basicity factor Km=1.0～1.3 scopes, and grog is made in calcining under the firing temperature of 1200 ℃～1300 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310333510.6A CN103387368B (en) | 2013-08-02 | 2013-08-02 | A kind of very low temperature gelling blasting materials |
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|---|---|---|---|
| CN201310333510.6A CN103387368B (en) | 2013-08-02 | 2013-08-02 | A kind of very low temperature gelling blasting materials |
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| Publication Number | Publication Date |
|---|---|
| CN103387368A true CN103387368A (en) | 2013-11-13 |
| CN103387368B CN103387368B (en) | 2015-09-23 |
Family
ID=49531802
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|---|---|---|---|
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Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446209A (en) * | 2014-12-04 | 2015-03-25 | 三明学院 | Environment-friendly active tailing micro-powder composite slurry and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054513A (en) * | 2007-05-21 | 2007-10-17 | 中国石油大学(华东) | Deep water low temperature cementing cement system |
-
2013
- 2013-08-02 CN CN201310333510.6A patent/CN103387368B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054513A (en) * | 2007-05-21 | 2007-10-17 | 中国石油大学(华东) | Deep water low temperature cementing cement system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104446209A (en) * | 2014-12-04 | 2015-03-25 | 三明学院 | Environment-friendly active tailing micro-powder composite slurry and application thereof |
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| Publication number | Publication date |
|---|---|
| CN103387368B (en) | 2015-09-23 |
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Granted publication date: 20150923 Termination date: 20160802 |
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