CN1559965A - Non-chlorine type high perpormance conrete accelerating agent - Google Patents
Non-chlorine type high perpormance conrete accelerating agent Download PDFInfo
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- CN1559965A CN1559965A CNA2004100165778A CN200410016577A CN1559965A CN 1559965 A CN1559965 A CN 1559965A CN A2004100165778 A CNA2004100165778 A CN A2004100165778A CN 200410016577 A CN200410016577 A CN 200410016577A CN 1559965 A CN1559965 A CN 1559965A
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Abstract
The invention relates to a chlorine-free high-performance concrete setting accelerator, composed of high-efficacy benzene solfonic acid formaldehyde condensation compound water reducer, sodium formate, sodium fluoride, fibrin and water. It can shorten the setting time of grout and concrete, and the initial setting time is in 5 min and the final setting time is in 10 min, and after setting, the strength of the grout rapidly develops. It can effectively avoid the corrosion damage of Cl- ions to the reinforcement in the concrete. It is applied to the shotcrete in tunnel, culvert and shoring engineering, and also the engineering of concrete emergency salvaging, anchoring, and water stopping and leakage stopping.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of Chlorine-free type high-performance concrete accelerator.
Background technology
A certain amount of admixture of admixture can improve the performance of concrete material on request in concrete, thereby makes the new construction technology of institute's concrete batching adaptation and satisfy various construction requirements.The a certain amount of accelerating chemicals of admixture can make just very quick setting sclerosis in the very short time behind institute's concrete batching blunge in concrete, and sets up intensity as early as possible.Mix the concrete of accelerating chemicals because setting and harden speed is very fast, be suitable for sprayed construction technology and quick the repairing and the sealing stoppage engineering.Because it is fast to mix the concrete coagulation speed of accelerating chemicals, strength development is also very fast, can produce certain defective to its microtexture unavoidably, generally has only the 70%-80% that does not mix the person so mix the concrete later strength of accelerating chemicals.
Because at present the accelerating chemicals that uses is mostly based on calcium chloride, yellow soda ash etc., and the accelerating chemicals volume generally accounts for the 4%-8% of cement quality, and like this, the admixture accelerating chemicals is equivalent to bring into the more Cl of inside concrete
-And alkalimetal ion.As everyone knows, Cl
-The action of rust that the reinforcing bar of inside concrete is had acceleration, there is the then very easy alkali that causes in alkaline, inside concrete is gathered materials-slurry interface performance deterioration, suction back even generation are expanded, make concrete structure generation catastrophic failure, moreover yellow soda ash alkalescence itself is strong, can cause certain injury to positions such as workman's eyes, skins during construction.Present accelerating chemicals new varieties research work is just turning to emphasis not only will shorten time of coagulation, promote the early strength development, and improve concrete cohesiveness, concrete is not easy to have a rebound the whereabouts phenomenon and causes waste when making sprayed construction, more priorly also is to reduce as much as possible Cl
-With the content of highly basic metal ion, just manage with materials such as the traditional calcium chloride of other chemical substance replacement, yellow soda ash, thereby make the use of accelerating chemicals more effective, safer.Also there is not report at present both at home and abroad about this respect.
Summary of the invention
The object of the present invention is to provide a kind of not chloride, and the lower Chlorine-free type high-performance concrete accelerator of alkali metal ion content measured.
The Chlorine-free type high-performance concrete accelerator that the present invention proposes is made up of naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent, calcium formiate, Sodium Fluoride, Mierocrystalline cellulose and water, and the weight ratio of each component is:
Naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 100
Calcium formiate 0-200
Sodium Fluoride 150-380
Mierocrystalline cellulose 0-0.08
Water 500-1800.
The preferable weight ratio of each component is:
Naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 100
Calcium formiate 20-160
Sodium Fluoride 160-350
Mierocrystalline cellulose 0.01-0.06
Water 700-1600.
Preparation method of the present invention is: by aforementioned each part by weight weighing each component, earlier water is added in the mixing machine, naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent, calcium formiate, Sodium Fluoride, Mierocrystalline cellulose are added successively in the mixing machine again and stir, dissolve, the time is 4-6 hour, obtains institute's invention product.
Among the present invention, the naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent is main plasticizing diminishing component, it is a kind of aniorfic surfactant, after adding in the cement slurry, can be adsorbed on cement particle surface, the formation hydrophobic group is inside, one deck adsorption layer that hydrophilic group is outside is because the electronegative nuclear of hydrophilic group is equivalent to the identical electric charge of each cement particle surface band in the slurry, because same sex electric charge repels mutually, make to be floccular paste structure disintegration originally, discharge the free water of wrapping up in the flucculation structure, thereby increase considerably the flowability of slurry, or under the diminishing situation, increase slurry intensity.Calcium formiate is a kind of setting accelerator, can make cement slurry quicken aquation and setting and harden.Sodium Fluoride can replace calcium chloride to use as setting accelerator, has avoided Cl
-Introducing.Sodium Fluoride and calcium formiate use together, and its blood coagulation enhancing effect superposes mutually, can make cement slurry setting and harden in the ultrashort time.Mierocrystalline cellulose plays flocculating effect, adds in grout or the concrete, can increase cohesiveness, and unlikely whereabouts in the concrete course of injection reduces the bounce-back rate, improves work efficiency, cuts the waste.
The present invention is a brown liquid, and concentration is 25%-50%, and density is 1.08-1.35g/m
3, concrete is condensed at short notice rapidly and comparatively fast set up intensity, be fit to sprayed construction technology and special engineerings such as repairing, sealing leak stopping, and this accelerating chemicals is less relatively to the negative impact of late strength of concrete.During use, its suitable incorporation in concrete is the 2%-7% of cement weight, and concrete volume is according to the actual requirement to concrete coagulating time, and is definite by testing.
The present invention can produce for concrete admixture factory, to the effect of inside concrete reinforcing bar non-corroding, is widely used in engineerings such as tunnel, culvert, bridge, supporting and repairing.
Embodiment
Embodiment 1, and it is formulated that Chlorine-free type high-performance concrete accelerator is pressed naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 8.00% (weight percent, as follows), calcium formiate 7.20%, Sodium Fluoride 24.80%, water 60.00%.This accelerating chemicals of admixture by mass of cement 4.5%, can make water cement ratio is that cement paste presetting period of 0.4 is 4min, and final setting time is 8min, can make 1 day ultimate compression strength of sand-cement slurry of 1: 2.5 reach 18MPa, and compressive strength rate surpassed 82% in 28 days.
Embodiment 2, and it is formulated that Chlorine-free type high-performance concrete accelerator is pressed naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 9.41%, calcium formiate 12.22986%, Sodium Fluoride 18.34%, Mierocrystalline cellulose 0.00014%, water 60.02%.This accelerating chemicals of admixture by mass of cement 4.0%, can make water cement ratio is that cement paste presetting period of 0.4 is 3min, and final setting time is 6min, can make 1 day ultimate compression strength of sand-cement slurry of 1: 2.5 reach 16MPa, and compressive strength rate surpassed 80% in 28 days.
Embodiment 3, and it is formulated that Chlorine-free type high-performance concrete accelerator is pressed naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 6.00%, calcium formiate 1.2%, Sodium Fluoride 22.8%, Mierocrystalline cellulose 0.0048%, water 69.9952%.This accelerating chemicals of admixture by mass of cement 6.0%, can make water cement ratio is that cement paste presetting period of 0.4 is 5min, and final setting time is 8min, can make 1 day ultimate compression strength of sand-cement slurry of 1: 2.5 reach 15MPa, and compressive strength rate surpassed 80% in 28 days.
Claims (3)
1, a kind of Chlorine-free type high-performance concrete accelerator is characterized in that by the naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent, calcium formiate, and Sodium Fluoride, Mierocrystalline cellulose and water are formed, and the weight ratio of each component is:
Naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 100
Calcium formiate 0-200
Sodium Fluoride 150-380
Mierocrystalline cellulose 0-0.08
Water 500-1800.
2, Chlorine-free type high-performance concrete accelerator according to claim 1 is characterized in that the each component weight ratio is:
Naphthalene sulfonic acidformaldehyde condensation product high efficiency water reducing agent 100
Calcium formiate 20-160
Sodium Fluoride 160-350
Mierocrystalline cellulose 0.01-0.06
Water 700-1600.
3, a kind of using method of Chlorine-free type high-performance concrete accelerator according to claim 1 is characterized in that the accelerating chemicals incorporation is the 2%-7% of cement weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100165778A CN100336760C (en) | 2004-02-26 | 2004-02-26 | Non-chlorine type high perpormance conrete accelerating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100165778A CN100336760C (en) | 2004-02-26 | 2004-02-26 | Non-chlorine type high perpormance conrete accelerating agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1559965A true CN1559965A (en) | 2005-01-05 |
| CN100336760C CN100336760C (en) | 2007-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100165778A Expired - Fee Related CN100336760C (en) | 2004-02-26 | 2004-02-26 | Non-chlorine type high perpormance conrete accelerating agent |
Country Status (1)
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| CN (1) | CN100336760C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503524A (en) * | 2011-09-30 | 2012-06-20 | 山东大学 | Foam concrete for wet-spraying support of coal mine and preparation method thereof |
| CN103755212A (en) * | 2013-12-19 | 2014-04-30 | 柳州正菱集团有限公司 | Concrete accelerator |
| CN105130265A (en) * | 2015-09-11 | 2015-12-09 | 王嘉文 | Efficient concrete accelerator |
| CN105236812A (en) * | 2015-09-11 | 2016-01-13 | 王嘉文 | Concrete accelerator |
| CN108033694A (en) * | 2017-12-26 | 2018-05-15 | 天津山水水泥有限公司 | Novel silicate cement and preparation method thereof |
| CN108046642A (en) * | 2018-01-23 | 2018-05-18 | 云南森博混凝土外加剂有限公司 | A kind of strong concrete accelerator |
| CN108129040A (en) * | 2017-12-26 | 2018-06-08 | 天津山水水泥有限公司 | A kind of portland cement and preparation method thereof |
-
2004
- 2004-02-26 CN CNB2004100165778A patent/CN100336760C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503524A (en) * | 2011-09-30 | 2012-06-20 | 山东大学 | Foam concrete for wet-spraying support of coal mine and preparation method thereof |
| CN103755212A (en) * | 2013-12-19 | 2014-04-30 | 柳州正菱集团有限公司 | Concrete accelerator |
| CN105130265A (en) * | 2015-09-11 | 2015-12-09 | 王嘉文 | Efficient concrete accelerator |
| CN105236812A (en) * | 2015-09-11 | 2016-01-13 | 王嘉文 | Concrete accelerator |
| CN108033694A (en) * | 2017-12-26 | 2018-05-15 | 天津山水水泥有限公司 | Novel silicate cement and preparation method thereof |
| CN108129040A (en) * | 2017-12-26 | 2018-06-08 | 天津山水水泥有限公司 | A kind of portland cement and preparation method thereof |
| CN108046642A (en) * | 2018-01-23 | 2018-05-18 | 云南森博混凝土外加剂有限公司 | A kind of strong concrete accelerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100336760C (en) | 2007-09-12 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Dingda Materials Co., Ltd. Assignor: Tongji University Contract fulfillment period: 2009.4.30 to 2015.4.30 contract change Contract record no.: 2009320000835 Denomination of invention: Non-chlorine type high perpormance conrete accelerating agent Granted publication date: 20070912 License type: Exclusive license Record date: 2009.5.12 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.30 TO 2015.4.30; CHANGE OF CONTRACT Name of requester: JIANGSU DINGDA MATERIALS CO., LTD. Effective date: 20090512 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070912 Termination date: 20130226 |