CN102976648A - Chloride-free and low-alkaline powder accelerator - Google Patents
Chloride-free and low-alkaline powder accelerator Download PDFInfo
- Publication number
- CN102976648A CN102976648A CN2012105513461A CN201210551346A CN102976648A CN 102976648 A CN102976648 A CN 102976648A CN 2012105513461 A CN2012105513461 A CN 2012105513461A CN 201210551346 A CN201210551346 A CN 201210551346A CN 102976648 A CN102976648 A CN 102976648A
- Authority
- CN
- China
- Prior art keywords
- accelerator
- accelerating chemicals
- alkaline
- concrete
- weight part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a chloride-free and low-alkaline powder accelerator and application thereof. The powder accelerator comprises aluminum sulfate and sodium metaaluminate and/or sodium fluoride, and the low-alkaline type refers to that the accelerator does not contain additional alkaline. The compound accelerator integrates the advantages of good accelerated setting effect of an alkaline-containing accelerator and strength loss prevention of an alkaline-free accelerator, meanwhile, the preparation cost is reduced, and the cost performance is improved. Therefore, the low-alkaline efficient accelerator is prepared, and the harm of the accelerator to the human body is reduced at the same time. The accelerator is suitable for sprayed concrete requiring accelerated setting; and by using the compound accelerator, the performance of cement concrete is improved, the solidification time of the cement concrete is regulated, the later strength of the cement concrete is not affected, and the production cost is reduced.
Description
Technical field
Patent of the present invention relates to a kind of concrete additive, particularly a kind of no chlorine and low alkali type powder accelerating chemicals and application thereof.
Background technology
Cement hardener (abbreviation accelerating chemicals) also claims setting accelerator, it is a kind of chemical admixture that can promote cement or concrete rapid coagulation, it can significantly shorten concrete and become solid-state required time by slurry, in several minutes, just can make it to lose flowability and harden, can reach final set in tens minutes, early strength is high.Accelerating chemicals is as a kind of Chemicals, and its production and use can be traced back to the thirties in 20th century
[1]The birth of accelerating chemicals and use be so that construction of shotcrete becomes possibility, and the foundation of roadway Shotcrete Rockbolt Support Technique is played an important role.
Along with concrete-spraying technology in geotechnical engineering widespread use and develop rapidly, people begin to pay attention to the research of Hardenfast.Accelerating chemicals can make the material spray rapid coagulation, prevents that spray-up from coming off under action of gravity in a large number, makes concrete reach rapidly certain intensity and also forms early the particular requirement that the sheath with certain bearing value satisfies the sprayed concrete engineering.In order to reduce rebound degree, or meet weak broken wall rock and ground water seepage, and supporting construction be need to resist the situation such as Influence of The Blasting Vibration the time immediately following Excavation, the general requirement sprayed concrete has the early characteristic such as solidifying, early strong.For this reason, usually need the admixture accelerating chemicals.
Nitto chemical industry company limited
[2]Adopt alkali-metal vitriol or carbonate to add again a kind of water miscible aluminium salt or the synthetic accelerating chemicals of magnesiumcarbonate.A kind of accelerating chemicals of Hirose etc. development is comprised of 70% calcium aluminate, 25% sodium aluminate and 5% yellow soda ash.Kawamura etc. adopt Al
2(SO
4)
3As alkali-free quick-coagulant, with 2 parts of Al
2(SO
4)
3Join in 98 parts of sand-cement slurry and just observe the rapid hardening effect.It is the main component of accelerating chemicals that Ogawa adopts calcium aluminate, vitriol and sodium aluminate, wherein the Na in the sodium aluminate
2O/Al
2O
3Less than 1.0.The U.S. and European Countries replace an alkali metal salt to come the research and production alkali-free quick-coagulant with calcium salt and aluminium salt.
Pan Zhihua etc.
[6]The people utilizes Wingdale, alumina, fusing assistant CaF
2With the synthetic cement minerals type alkali-free quick-coagulant of some chemical reagent.The main component of this accelerating chemicals is C
12A
7And C
11A
7.CaF
2Cut off from the flourish calcareous and aluminum raw material that adopts proper ratio that waits of dish, grinding and add the synthetic a kind of cement minerals type accelerating chemicals of an amount of admixture after heat treated.
Although external most of accelerating chemicals excellent propertys of producing are on the high side at present.Although the accelerating chemicals of the present production and selling of China is so not expensive, a lot of accelerating chemicalss are compared on the high side with traditional accelerating chemicals.
Compare with traditional accelerating chemicals, although it is little that the novel alkali-free quick-coagulant of research and production and the compound class accelerating chemicals of organic-inorganic possess the later strength loss at present, the advantages such as dust is little in production and the construction, but the suitable volume that they will reach satisfied rapid hardening effect is generally large than traditional accelerating chemicals.
The most accelerating chemicals all is research and productions for the defective that overcomes traditional accelerating chemicals, but tends to attend to one thing and lose sight of another.A lot of novel alkali-free quick-coagulant such as China's exploitation makes dust minimizing in the construction, and simultaneously later strength loss is little, but has brought the lower problem of early strength, the requirement that has even do not reach national standard JC477.
Domestic accelerating chemicals is the high alkalinity accelerating chemicals at present.Accelerating chemicals also exists certain technical problem and negative impact, because the introducing of a large amount of alkali causes late strength of concrete (28d intensity) significantly to descend, the decline degree can reach 30%～50%.From work physiology and environment protection, this class alkalescence setting accelerator has the side effect of series.Because it has strong corrodibility, spraying personnel and excavation operation personnel's health there is harm.In addition, also can make underground water alkalization and polluted underground water particularly must extraordinarily be paid attention to the tap water protection zone.Also can produce detrimentally affect to sprayed concrete, can reduce more or less its final strength, dense water, freeze-thawing resistant ability, thereby concrete weather resistance is descended.
So under the developmental level prerequisite of the present accelerating chemicals of China, the alkali-free liquid accelerating agent of the rapid hardening of development collection, low-dosage, low burn into high strength, high comprehensive performance, reasonable price has very important realistic meaning.
Summary of the invention
The purpose of this invention is to provide a kind of Hardenfast, in order to realize purpose of the present invention, intend adopting following technical scheme:
One aspect of the present invention relates to a kind of no chlorine and low alkali type shotcrete accelerator, and it comprises Tai-Ace S 150 and sodium metaaluminate and/or Sodium Fluoride, comprises or do not comprise other composition; Described low alkali type refers to not comprise in the accelerating chemicals extra alkali.
In a preferred embodiment of the present invention, the amount of described Tai-Ace S 150 is the 1.0-3.0 weight part, and the amount of Sodium Fluoride is the 0-2.0 weight part, is preferably the 0.3-0.7 weight part; The amount of sodium metaaluminate is the 0-1.0 weight part, is preferably the 0.3-0.7 weight part.
In a preferred embodiment of the present invention, the amount that it is characterized in that Tai-Ace S 150 is that the amount of 1.5 weight parts, sodium metaaluminate is that the amount of 0.5 weight part, Sodium Fluoride is 0.5 weight part.
The present invention also relates to above-mentioned accelerating chemicals on the other hand in the application of accelerating on the concrete coagulation speed.
In a preferred embodiment of the present invention, it is characterized in that accelerating chemicals is joined in the concrete, the cement component consumption in the described concrete is 100 weight parts.
The present invention also relates to above-mentioned accelerating chemicals on the other hand in the application that improves on the concrete early anti pressured intension.
In a preferred embodiment of the present invention, it is characterized in that described concrete 28d compressive strength rate surpasses 90%, preferably surpasses 93%.
The composite accelerating chemicals of the present invention combines and contains the effective and alkali-free quick-coagulant of alkali accelerating chemicals rapid hardening to the break-even advantage of intensity, has also reduced the cost of preparation simultaneously, has improved cost performance.Thus, make the accelerating chemicals of low-alkali high-efficiency, also reduced the injury of accelerating chemicals to human body simultaneously.The present invention is applicable to require the sprayed concrete of rapid hardening, improves the coagulating cement oil properties, regulates cement concrete time of coagulation with composite accelerating chemicals, and do not affect its later strength, saves production cost.
Embodiment:
Below, the present invention is described in further detail in conjunction with some embodiment, but the present invention is not limited to these specific embodiments.
Embodiment 1
No chlorine and low alkali type shotcrete accelerator by Tai-Ace S 150 2.0% (by cement quality per-cent, as follows), Sodium Fluoride 1.5% is formulated, mix simultaneously the two per-cent by above-mentioned cement quality in the cement, can make water cement ratio is that cement paste presetting period of 0.4 is 3min, final setting time is 5min, the mass ratio that can make cement and standard sand is 1: 1.5, and water cement ratio is that 0.5 sand-cement slurry 1d ultimate compression strength reaches 14.34MPa, and the 28d compressive strength rate surpasses 93%.
Embodiment 2
No chlorine and low alkali type shotcrete accelerator is pressed Tai-Ace S 150 2.0%, sodium metaaluminate 0.75% is formulated, mix simultaneously the accelerating chemicals of the two composition in the cement, can make water cement ratio is that cement paste presetting period of 0.4 is 3.5min, final setting time is 6min, the mass ratio that can make cement and standard sand is 1: 1.5, water cement ratio is that 0.5 sand-cement slurry 1d ultimate compression strength reaches 7.42MPa, and the 28d compressive strength rate surpasses 90%.
Embodiment 3
It is formulated that no chlorine and low alkali type shotcrete accelerator is pressed Tai-Ace S 150 2.0%, sodium metaaluminate 0.25%, Sodium Fluoride 0.25%, mix simultaneously the accelerating chemicals that the three forms in the cement, can make water cement ratio is that cement paste presetting period of 0.4 is 2.5min, final setting time is 4.5min, the mass ratio that can make cement and standard sand is 1: 1.5, water cement ratio is that 0.5 sand-cement slurry 1d ultimate compression strength reaches 8.28MPa, and the 28d compressive strength rate surpasses 95%.
Embodiment 4
It is formulated that no chlorine and low alkali type shotcrete accelerator is pressed Tai-Ace S 150 1.5%, sodium metaaluminate 0.5%, Sodium Fluoride 0.5%, mix simultaneously the accelerating chemicals that the three forms in the cement, can make water cement ratio is that cement paste presetting period of 0.4 is 3min, final setting time is 7.5min, the mass ratio that can make cement and standard sand is 1: 1.5, water cement ratio is that 0.5 sand-cement slurry 1d ultimate compression strength reaches 8.9MPa, and the 28d compressive strength rate surpasses 96%.
The above be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, and any variation or replacement of expecting without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (7)
1. no chlorine and low alkali type powder accelerating chemicals, it comprises Tai-Ace S 150 and sodium metaaluminate and/or Sodium Fluoride, comprises or do not comprise other composition; Described low alkali type refers to not comprise in the accelerating chemicals extra alkali.
2. accelerating chemicals according to claim 1, the amount that it is characterized in that Tai-Ace S 150 is the 1.0-3.0 weight part, the amount of Sodium Fluoride is the 0-2.0 weight part, is preferably the 0.3-0.7 weight part; The amount of sodium metaaluminate is the 0-1.0 weight part, is preferably the 0.3-0.7 weight part.
3. accelerating chemicals according to claim 1, the amount that it is characterized in that Tai-Ace S 150 are that the amount of 1.5 weight parts, sodium metaaluminate is that the amount of 0.5 weight part, Sodium Fluoride is 0.5 weight part.
4. the described accelerating chemicals of claim 1-3 any one is in the application of accelerating on the concrete coagulation speed.
5. application according to claim 4 is characterized in that accelerating chemicals is joined in the concrete, and concrete consumption is 100 weight parts.
6. the described accelerating chemicals of claim 1-3 any one is in the application that improves on the concrete early anti pressured intension.
7. application according to claim 6 is characterized in that described concrete 28d compressive strength rate surpasses 90%, preferably surpasses 93%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105513461A CN102976648A (en) | 2012-12-08 | 2012-12-08 | Chloride-free and low-alkaline powder accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105513461A CN102976648A (en) | 2012-12-08 | 2012-12-08 | Chloride-free and low-alkaline powder accelerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102976648A true CN102976648A (en) | 2013-03-20 |
Family
ID=47851059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105513461A Pending CN102976648A (en) | 2012-12-08 | 2012-12-08 | Chloride-free and low-alkaline powder accelerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102976648A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387350A (en) * | 2013-08-02 | 2013-11-13 | 甘肃智通科技工程检测咨询有限公司 | Environment-friendly low-alkali CL-free accelerator |
| CN107986669A (en) * | 2017-12-07 | 2018-05-04 | 中铁岩锋成都科技有限公司 | Alkali-free liquid setting accelerator and preparation method thereof |
| CN110981257A (en) * | 2019-12-16 | 2020-04-10 | 北京科技大学 | Alkali-free and chlorine-free concrete accelerator based on magnesium carbonate trihydrate |
| CN111662036A (en) * | 2020-05-18 | 2020-09-15 | 山西佳维新材料股份有限公司 | Low-alkali accelerator and preparation method and application thereof |
| CN113121150A (en) * | 2021-04-25 | 2021-07-16 | 山西佳维新材料股份有限公司 | Alkali-free accelerator and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN102219426A (en) * | 2011-04-15 | 2011-10-19 | 中铁隧道集团有限公司 | Low-alkaline liquid accelerating agent and preparation method thereof |
-
2012
- 2012-12-08 CN CN2012105513461A patent/CN102976648A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN102219426A (en) * | 2011-04-15 | 2011-10-19 | 中铁隧道集团有限公司 | Low-alkaline liquid accelerating agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 江东亮等: "《中国材料工程大典 第9卷 无机非金属材料工程 (下)》", 31 March 2006, 化学工业出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387350A (en) * | 2013-08-02 | 2013-11-13 | 甘肃智通科技工程检测咨询有限公司 | Environment-friendly low-alkali CL-free accelerator |
| CN103387350B (en) * | 2013-08-02 | 2014-12-31 | 甘肃智通科技工程检测咨询有限公司 | Environment-friendly low-alkali CL-free accelerator |
| CN107986669A (en) * | 2017-12-07 | 2018-05-04 | 中铁岩锋成都科技有限公司 | Alkali-free liquid setting accelerator and preparation method thereof |
| CN110981257A (en) * | 2019-12-16 | 2020-04-10 | 北京科技大学 | Alkali-free and chlorine-free concrete accelerator based on magnesium carbonate trihydrate |
| CN111662036A (en) * | 2020-05-18 | 2020-09-15 | 山西佳维新材料股份有限公司 | Low-alkali accelerator and preparation method and application thereof |
| CN113121150A (en) * | 2021-04-25 | 2021-07-16 | 山西佳维新材料股份有限公司 | Alkali-free accelerator and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111018435B (en) | High-strength high-toughness polymer material and preparation method thereof | |
| CN105565691B (en) | A kind of lead-zinc smelting slag-based geopolymer binder materials and preparation method thereof | |
| CN102249638B (en) | Environment-friendly diatom decorative mud powder capable of automatic humidification / formaldehyde elimination / antibiosis / flame retardation | |
| CN102976648A (en) | Chloride-free and low-alkaline powder accelerator | |
| CN105060786B (en) | A kind of feldspar waste material concrete and preparation method thereof | |
| CN104724989A (en) | Ground limestone powder full-manufactured sand high-strength recycled self-compacting concrete and application thereof | |
| CN102887676A (en) | C30 concrete prepared from high-concentration concrete waste slurry water | |
| CN1239085A (en) | Soil solidifying agent | |
| RU2011134840A (en) | GEOPOLYMERIC COMPOSITE BINDERS WITH TASKED CHARACTERISTICS FOR CEMENT AND CONCRETE | |
| CN103086618B (en) | Construction waste micro-powder solidifying agent for solidifying soil mass | |
| CN104310837B (en) | A kind of dry powder and mortar and additive thereof | |
| CN110451903A (en) | A kind of composite cementitious materials and the cementing method of the ultra-fine tailings of lead-zinc ore of high-sulfur | |
| CN105272091A (en) | Geopolymer composite grouting material, and preparation method and use method thereof | |
| CN104072028A (en) | Method for preparing concrete from industrial waste residue fine aggregate | |
| CN103553412A (en) | Special reinforced composite admixture for high-speed railway ballastless track double-block sleepers | |
| Pougnong et al. | Effects of chemical composition of amorphous phase on the reactivity of phosphoric acid activation of volcanic ashes | |
| CN101234882B (en) | Floor brick prepared from oil field sludge | |
| CN108264323A (en) | With flyash and the partition wall batten of desulfurated plaster preparation and preparation method thereof | |
| CN102126847B (en) | Fireproof quick-drying type spraying material | |
| CN104250083B (en) | A kind of metallurgical slag air entrained concrete and processing technology and application | |
| CN116003092B (en) | Sulfur-based and base solid waste stirring granulation foaming one-step forming baking-free high-strength lightweight aggregate and preparation method and application thereof | |
| CA2093319A1 (en) | Method for improving the activation of latently hydraulic basic blast-furnace slag in the production of a building material | |
| CN1329336C (en) | Cement early strength agent and its prepn | |
| CN115403350B (en) | Artificial fish reef material prepared from incineration slag and method for preparing fish reef by using artificial fish reef material | |
| CN106746809A (en) | A kind of complex slag and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130320 |