CN102557517A - High-efficiency admixture of subway shield segments, preparation method and use method thereof - Google Patents
High-efficiency admixture of subway shield segments, preparation method and use method thereof Download PDFInfo
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- CN102557517A CN102557517A CN2012100085195A CN201210008519A CN102557517A CN 102557517 A CN102557517 A CN 102557517A CN 2012100085195 A CN2012100085195 A CN 2012100085195A CN 201210008519 A CN201210008519 A CN 201210008519A CN 102557517 A CN102557517 A CN 102557517A
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- admixture
- subway shield
- plate
- reducing agent
- shield pipe
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Abstract
The invention discloses a high-efficiency admixture for subway shield segments, a preparation method and a use method thereof. The admixture is prepared by the following components in parts by weight: 30-50 parts of carboxylate water-reducing agent, 10-30 parts of JF-2 high-efficiency water-reducing agent, 0.05-0.5 part of defoaming agent dimethyl silicon oil, 1-5 parts of early-strength agent triethanolamine and 0.01-0.4 part of carboxymethyl cellulose admixture processed under certain process conditions. The admixture has the advantages of low cost, high water-reducing ratio, good early-strength and early-solidification effects, short mold-turnround time, good volume stability of prepared concrete and compact surface with fewer bubbles, and is an high-efficiency admixture for the subway shield segments.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of efficient subway shield pipe-plate admixture and preparation and method of use.
Background technology
The specification of quality of metro shield section of jurisdiction is exactly the requirement of clear-water concrete, and clear-water concrete is once shaped, does not do any outer decoration, needs that surfacing is smooth, color and luster is even, corner angle are clearly demarcated, no clashing and breaking and pollution.Its feature has been represented expression-form the highest in the concrete material, embodiment be wear no make-up during an audience with the emperor, simple and unadorned, sedate naturally grade.In addition, because the section of jurisdiction will be reduced between the time of wiping one's face and quiet stopping time in process of production, shorten the steam-cured time; Faster production, this just requires admixture has does not early have bleed and slow setting by force with the performance, the especially admixture that early coagulate composition; This is because the section of jurisdiction produces the steam-cured technology that adopts; If retardation phenomenon takes place, bulging, loose and bubble phenomenon that the surface, section of jurisdiction has just had has a strong impact on the quality and the outward appearance of section of jurisdiction.Admixture also will have higher water-reducing rate and cement and adulterant are had good flexibility.The water reducer that is used at present on the section of jurisdiction is naphthalene system, melamine system, polycarboxylic acid series etc., and this series products is used on the section of jurisdiction, and what have surperficial many bubbles, rough, the dim uneven phenomenon of color and luster obviously can occur; By force, early coagulate weak effect the morning that has; Mould time of turnover is long, and volume stability is poor, and it is relatively more difficult less than the requirement of 1mm to satisfy subway shield pipe-plate geometrical dimension deviation; And this type water reducer cost is high, has significantly improved the laid down cost of metro shield section of jurisdiction.
Summary of the invention
For remedying the deficiency of prior art, the present invention provides efficient subway shield pipe-plate admixture and preparation and the method for use that volume stability of concrete is good, the surface compact bubble is few that a kind of cost is low, water-reducing rate is high, morning is strong, the morning is effective with fixed attention, the mould turnover time is short, prepare.
For reaching the foregoing invention purpose; The technical scheme that the present invention adopted is: a kind of efficient subway shield pipe-plate admixture is provided; Said admixture is made up of carboxylate salt water reducer, JF-2 high efficiency water reducing agent, skimmer dimethyl silicone oil, hardening accelerator trolamine, CMC 99.5, water, and each ingredients weight parts is:
Carboxylate salt water reducer 30-50 part;
JF-2 high efficiency water reducing agent 10-30 part;
Skimmer dimethyl silicone oil 0.05-0.5 part;
Hardening accelerator trolamine 1-5 part;
CMC 99.5 0.01-0.4 part;
Water 15-59 part.
Preferably, said carboxylate salt water reducer is by mononuclear aromatics verivate and formaldehyde condensation, carries out the aqua that graft reaction is processed with polyethers again, and solid holdup is 38%, and molecular-weight average is 8,000,000-1,000 ten thousand.
Preferably, said JF-2 high efficiency water reducing agent is a naphthalenesulfonate formaldehyde condensation compound.
A kind of preparation method of efficient subway shield pipe-plate admixture carries out according to the following steps:
Earlier CMC 99.5 is added in the entry; Stirring makes it dissolving; Add carboxylate salt water reducer and JF-2 high efficiency water reducing agent again, stir mixing in 0.5-1 hour, left standstill 2-4 hour; Add hardening accelerator trolamine and skimmer dimethyl silicone oil at last and stirred 0.5-1 hour, make efficient subway shield pipe-plate admixture.
A kind of method of use of efficient subway shield pipe-plate admixture, preferably, the volume of said admixture is the 0.5%-1.5% of metro shield section of jurisdiction concrete glue material weight.
In sum, efficient subway shield pipe-plate admixture provided by the present invention compared with prior art has following beneficial effect:
1) water reducer of the present invention's employing is that weight part is carboxylate salt water reducer of 30-50 part and the JF-2 high efficiency water reducing agent that weight part is 10-30 part; This water reducer has a large amount of carboxyls to exist, and has certain sequestering power, adds that the three-dimensional electrostatic repulsion of benzene ring structure constitutes the obstruction to cohesion between the cement particle; Make cement have stronger dispersiveness; Water-reducing rate is high, makes concrete system keep better volume stability, can satisfy the requirement of subway shield pipe-plate geometrical dimension deviation less than 1mm.
2) the JF-2 high efficiency water reducing agent of the present invention's employing contains more sodium sulfate, and is early effective by force, and JF-2 high efficiency water reducing agent price is very low, greatly reduces the production cost of admixture.
3) hardening accelerator that adopts of the present invention is content more than or equal to 99% trolamine, and it can significantly improve concrete rate of set and early strong speed, makes the mould turnover time less than 8 hours, improves mould week transfer efficient greatly.
4) skimmer that uses of the present invention is dimethyl silicone oil, and it can destroy the bubble that material produces in whipping process, and can reduce the generation that surface tension suppresses bubble, has solved the problem of the many bubbles in surface, metro shield section of jurisdiction effectively.
5) contain CMC 99.5 in the formula for a product of the present invention, make the concrete of this product of admixture that good water-retentivity and intensity arranged, even under Vibration Technology intensive condition, also layering, segregation and excreting water phenomenon can not occur.
6) efficient subway shield pipe-plate admixture provided by the present invention is the admixture of being processed under certain processing condition according to specific formula rate by carboxylate salt water reducer, JF-2 high efficiency water reducing agent, skimmer dimethyl silicone oil, hardening accelerator trolamine, CMC 99.5; This admixture is with low cost, water-reducing rate is high, morning is strong, the morning is effective with fixed attention, the mould turnover time is short, volume stability of concrete preparation is good, the surface compact bubble is few, is a kind of metro shield efficiently section of jurisdiction admixture.
Embodiment
Do below in conjunction with the specific embodiment specific embodiments of the invention and to describe in detail:
Embodiment 1:
Earlier with 0.40 part of CMC 99.5 (weight part; Slowly join in 32.7 parts of water down together); Stirring makes it abundant dissolving, adds 48 parts of carboxylate salt water reducers again and 14 parts of naphthalenesulfonate formaldehyde condensation compounds constantly mix, and leaves standstill 2 hours after mixing; Adding 4.5 parts of trolamines and 0.40 part of dimethyl silicone oil at last stirred 0.5 hour; Make efficient subway shield pipe-plate admixture, compare, mix between quiet stopping time of metro shield section of jurisdiction (incorporation be concrete glue material amount 0.5%) of product of the present invention and reduce by 51% and 29% respectively with the metro shield section of jurisdiction of mixing naphthalene series additive and polycarboxylic acid series additive (incorporation be concrete glue material amount 0.5%); Demould time reduces by 30% and 15% respectively; And any surface finish do not have bubble, and there are washmarking and founding in the surface, metro shield section of jurisdiction of mixing the naphthalene series additive, and there is the pin hole air pocket on the surface, metro shield section of jurisdiction of mixing polycarboxylic acid series additive.
Embodiment 2:
Earlier 0.15 part of CMC 99.5 is slowly joined in 34.6 parts of water; Stirring makes it abundant dissolving; Add 42 parts of carboxylate salt water reducers again and 20 parts of naphthalenesulfonate formaldehyde condensation compounds constantly mix; Left standstill after mixing 3 hours, and added 3.0 parts of trolamines and 0.25 part of dimethyl silicone oil at last and stirred 0.8 hour, make efficient subway shield pipe-plate admixture; Compare with the metro shield section of jurisdiction of mixing naphthalene series additive and polycarboxylic acid series additive (incorporation be concrete glue material amount 1.0%); Mix between quiet stopping time of metro shield section of jurisdiction (incorporation be concrete glue material amount 1.0%) of product of the present invention and reduce by 42% and 16% respectively, demould time reduces by 24% and 7.2% respectively, and any surface finish does not have bubble; And there are washmarking and founding in the surface, metro shield section of jurisdiction of mixing the naphthalene series additive, and there is the pin hole air pocket on the surface, metro shield section of jurisdiction of mixing polycarboxylic acid series additive.
Embodiment 3:
Earlier 0.05 part of CMC 99.5 is slowly joined in 35.4 parts of water; Stirring makes it abundant dissolving; Add 35 parts of carboxylate salt water reducers again and 28 parts of naphthalenesulfonate formaldehyde condensation compounds constantly mix; Left standstill after mixing 4 hours, and added 1.5 parts of trolamines and 0.06 part of dimethyl silicone oil at last and stirred 0.5 hour, make efficient subway shield pipe-plate admixture; Compare with the metro shield section of jurisdiction of mixing naphthalene series additive and polycarboxylic acid series additive (incorporation be concrete glue material amount 1.5%); Mix between quiet stopping time of metro shield section of jurisdiction (incorporation be concrete glue material amount 1.5%) of product of the present invention and reduce by 36% and 7% respectively, demould time reduces by 19% and 2% respectively, and any surface finish does not have bubble; And there are washmarking and founding in the surface, metro shield section of jurisdiction of mixing the naphthalene series additive, and there is the pin hole air pocket on the surface, metro shield section of jurisdiction of mixing polycarboxylic acid series additive.
Though describe in detail, be not to be qualification to this patent protection domain in conjunction with the specific embodiment specific embodiments of the invention.In claims institute restricted portion, various modifications that those skilled in the art can make without creative work or adjustment still receive the protection of this patent.
Claims (5)
1. an efficient subway shield pipe-plate admixture is characterized in that said admixture is made up of carboxylate salt water reducer, JF-2 high efficiency water reducing agent, skimmer dimethyl silicone oil, hardening accelerator trolamine, CMC 99.5, water, and each ingredients weight parts is:
Carboxylate salt water reducer 30-50 part;
JF-2 high efficiency water reducing agent 10-30 part;
Skimmer dimethyl silicone oil 0.05-0.5 part;
Hardening accelerator trolamine 1-5 part;
CMC 99.5 0.01-0.4 part;
Water 15-59 part.
2. efficient subway shield pipe-plate admixture according to claim 1; It is characterized in that: said carboxylate salt water reducer is by mononuclear aromatics verivate and formaldehyde condensation; Carry out the aqua that graft reaction is processed with polyethers again, solid holdup is 38%, and molecular-weight average is 8,000,000-1,000 ten thousand.
3. efficient subway shield pipe-plate admixture according to claim 1, it is characterized in that: said JF-2 high efficiency water reducing agent is a naphthalenesulfonate formaldehyde condensation compound.
4. the preparation method of the described efficient subway shield pipe-plate admixture of claim 1 is characterized in that, said preparation method follows these steps to carry out:
Earlier CMC 99.5 is added in the entry; Stirring makes it dissolving; Add carboxylate salt water reducer and JF-2 high efficiency water reducing agent again, stir mixing in 0.5-1 hour, left standstill 2-4 hour; Add hardening accelerator trolamine and skimmer dimethyl silicone oil at last and stirred 0.5-1 hour, make efficient subway shield pipe-plate admixture.
5. the method for use of the described efficient subway shield pipe-plate admixture of claim 1, it is characterized in that: the volume of said admixture is the 0.5%-1.5% of metro shield section of jurisdiction concrete glue material weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210008519 CN102557517B (en) | 2012-01-12 | 2012-01-12 | High-efficiency admixture of subway shield segments, preparation method and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210008519 CN102557517B (en) | 2012-01-12 | 2012-01-12 | High-efficiency admixture of subway shield segments, preparation method and use method thereof |
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| Publication Number | Publication Date |
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| CN102557517A true CN102557517A (en) | 2012-07-11 |
| CN102557517B CN102557517B (en) | 2013-09-11 |
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| CN 201210008519 Expired - Fee Related CN102557517B (en) | 2012-01-12 | 2012-01-12 | High-efficiency admixture of subway shield segments, preparation method and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170078698A (en) * | 2014-10-31 | 2017-07-07 | 롬 앤드 하아스 컴패니 | Two component synthetic water retention agent and rheology modifier for use in cements, mortars and plasters |
Citations (4)
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| US20070066728A1 (en) * | 2005-09-22 | 2007-03-22 | Nippon Shokubai Co., Ltd. | Polycarboxylic acid polymer for cement admixture and cement admixture |
| CN101244909A (en) * | 2008-03-24 | 2008-08-20 | 湖南省建筑工程集团总公司 | Highly durable high slump loss resistant no-bleeding concrete pump delivering agent |
| CN101314534A (en) * | 2008-07-14 | 2008-12-03 | 浙江大学 | Method for reinforcing alpha hemihydrate gypsum hydrated hardenite by employing organic complex additive agent |
| CN101348346A (en) * | 2008-08-26 | 2009-01-21 | 童常荣 | Concrete pipe pile plasticizer, preparation thereof and method for producing pipe pile with the same |
-
2012
- 2012-01-12 CN CN 201210008519 patent/CN102557517B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070066728A1 (en) * | 2005-09-22 | 2007-03-22 | Nippon Shokubai Co., Ltd. | Polycarboxylic acid polymer for cement admixture and cement admixture |
| CN101244909A (en) * | 2008-03-24 | 2008-08-20 | 湖南省建筑工程集团总公司 | Highly durable high slump loss resistant no-bleeding concrete pump delivering agent |
| CN101314534A (en) * | 2008-07-14 | 2008-12-03 | 浙江大学 | Method for reinforcing alpha hemihydrate gypsum hydrated hardenite by employing organic complex additive agent |
| CN101348346A (en) * | 2008-08-26 | 2009-01-21 | 童常荣 | Concrete pipe pile plasticizer, preparation thereof and method for producing pipe pile with the same |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170078698A (en) * | 2014-10-31 | 2017-07-07 | 롬 앤드 하아스 컴패니 | Two component synthetic water retention agent and rheology modifier for use in cements, mortars and plasters |
| CN107074655A (en) * | 2014-10-31 | 2017-08-18 | 罗门哈斯公司 | For the two-component synthesis water-loss reducer and rheology modifier in cement, mortar and gypsum |
| US10005694B2 (en) * | 2014-10-31 | 2018-06-26 | Rohm And Haas Company | Two component synthetic water retention agent and rheology modifier for use in cements, mortars and plasters |
| CN107074655B (en) * | 2014-10-31 | 2019-10-18 | 罗门哈斯公司 | For the two-component synthesis water-retaining agent and rheology modifier in cement, mortar and gypsum |
| KR102477889B1 (en) | 2014-10-31 | 2022-12-15 | 롬 앤드 하아스 컴패니 | Two component synthetic water retention agent and rheology modifier for use in cements, mortars and plasters |
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| CN102557517B (en) | 2013-09-11 |
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Granted publication date: 20130911 Termination date: 20190112 |