CN113003976A - Alkali-free liquid accelerator containing fluorosilicate and preparation method and application thereof - Google Patents
Alkali-free liquid accelerator containing fluorosilicate and preparation method and application thereof Download PDFInfo
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- CN113003976A CN113003976A CN202110425878.XA CN202110425878A CN113003976A CN 113003976 A CN113003976 A CN 113003976A CN 202110425878 A CN202110425878 A CN 202110425878A CN 113003976 A CN113003976 A CN 113003976A
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- alkali
- free liquid
- aluminum sulfate
- fluorosilicate
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to an alkali-free liquid accelerator containing fluorosilicate, a preparation method and application thereof, wherein the accelerator comprises the following components in parts by weight: 46-53 parts of aluminum sulfate, 5-12 parts of magnesium fluosilicate, 2.5-5.0 parts of diethanolamine, 0.1-0.5 part of triethanolamine, 0.5-2.0 parts of anhydrous sodium sulphate and 27.5-45.9 parts of water, and the aluminum sulfate is prepared by the following steps: (1) adding aluminum sulfate into a reaction container, pouring water into the reaction container, heating in a water bath, and keeping constant temperature; (2) under the condition of stirring, sequentially and alternately adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate; (3) the stirring reaction is continued until the reaction is naturally cooled, and the accelerator is applied to sprayed concrete. Compared with the prior art, the invention has the advantages of short cement final setting time, high stability, high 1d strength and the like.
Description
Technical Field
The invention relates to the technical field of accelerating agents, and particularly relates to an alkali-free liquid accelerating agent containing fluorosilicate, and a preparation method and application thereof.
Background
The accelerator is a chemical additive capable of quickly setting and hardening cement or concrete, and is an essential component in sprayed concrete. In recent years, with the large-scale construction of projects such as spray anchor support, railway tunnels, mines, rush repair reinforcement, plugging and the like, the demand of the accelerator is increasing. The alkali-free liquid accelerator has the advantages of good construction environment, low resilience, high later strength retention rate and the like, so the development of the alkali-free liquid accelerator is a key research direction in the field of the current accelerator.
The quick-setting component in the liquid alkali-free quick-setting agent widely used at present is mainly aluminum sulfate. However, it has been found that the simple aluminum sulfate solution has a poor stability, while the rapid hardening effect and the early strength property are not satisfactory.
For example, Chinese patent CN108793806A discloses an alkali-free liquid accelerator and a preparation method thereof, which comprises the following components in percentage by weight: 45-55% of aluminum sulfate, 1-5% of aluminum hydroxide, 1-5% of phosphoric acid, 1-3% of diethanolamine, 1-3% of glycolic acid, 0.5-2% of sepiolite ore powder, 0.5-2% of bisphenol condensate and the balance of deionized water.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an alkali-free liquid accelerator containing fluorosilicate, which has short final setting time, high stability and high 1d strength of cement, a preparation method and application thereof.
The purpose of the invention can be realized by the following technical scheme:
the inventor knows that the introduction of components such as magnesium fluosilicate and the like into the alkali-free liquid accelerator is equivalent to the introduction of fluorine and silicon, and fluorine can be used for promoting the acceleration of the accelerator, the storage stability of the accelerator is solved, and the early development problem of concrete is solved by using silicon. However, at present, little research is done on the application effect of magnesium fluorosilicate in alkali-free liquid setting accelerators. Therefore, the application explores the positive effect of introducing components such as magnesium fluosilicate and the like into the alkali-free liquid accelerator and the proper using amount of the magnesium fluosilicate, further optimizes an alkali-free liquid accelerator system with better compatibility with the components such as the magnesium fluosilicate and the like, improves the performance of the alkali-free liquid accelerator to the maximum extent, reduces the production cost, and has the following specific scheme:
an alkali-free liquid accelerator containing fluorosilicate comprises the following components in parts by weight: 46-53 parts of aluminum sulfate, 5-12 parts of magnesium fluosilicate, 2.5-5.0 parts of diethanolamine, 0.1-0.5 part of triethanolamine, 0.5-2.0 parts of anhydrous sodium sulphate and 27.5-45.9 parts of water.
Preferably, the accelerator comprises the following components in parts by weight: 46-50 parts of aluminum sulfate, 5-8 parts of magnesium fluosilicate, 2.5-4.0 parts of diethanolamine, 0.1-0.3 part of triethanolamine, 0.5-2.0 parts of anhydrous sodium sulphate and 36.2-45.9 parts of water.
Preferably, the accelerator comprises the following components in parts by weight: 48-50 parts of aluminum sulfate, 6-8 parts of magnesium fluosilicate, 3.5-4.0 parts of diethanolamine, 0.2-0.3 part of triethanolamine, 1.5-2.0 parts of anhydrous sodium sulphate and 36.2-40.3 parts of water.
Preferably, the accelerator comprises the following components in parts by weight: 48 parts of aluminum sulfate, 6 parts of magnesium fluosilicate, 3.5 parts of diethanolamine, 0.2 part of triethanolamine, 2.0 parts of anhydrous sodium sulphate and 40.3 parts of water.
The aluminum sulfate, the magnesium fluosilicate, the diethanol amine and the triethanolamine are added to play a role in reducing the setting time of the cement paste; the magnesium fluosilicate, the diethanol amine and the triethanolamine also play a role in improving the solubility of the aluminum sulfate in the alkali-free liquid accelerator; the anhydrous sodium sulphate plays a role in improving the one-day compressive strength of the cement mortar.
In the invention, if the addition amounts of aluminum sulfate, diethanolamine and triethanolamine are too low, the influence on the setting time of the cement slurry is too small; if the addition amount of the aluminum sulfate is too high, the accelerating agent is easy to flocculate and precipitate; if the addition amount of the diethanolamine is too high, the performance of the accelerator is not obviously improved; if the addition amount of the triethanolamine is too high, the one-day strength of the cement mortar is obviously reduced; if the addition amount of the magnesium fluosilicate is too low, the setting time of the cement can be prolonged; if the addition amount of the magnesium fluosilicate is too high, the one-day strength of the cement mortar is reduced; if the addition amount of the anhydrous sodium sulphate is too low, the one-day strength of the cement mortar can hardly reach the standard; if the addition amount of the anhydrous sodium sulphate is too high, the alkali content is too high and exceeds the range of the alkali-free setting accelerator, so that the later strength of the cement mortar is low.
A method for preparing an alkali-free liquid accelerator containing fluorosilicate as described above, comprising the steps of:
(1) adding aluminum sulfate into a reaction container, pouring water into the reaction container, heating in a water bath, and keeping constant temperature;
(2) under the condition of stirring, sequentially and alternately adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate;
(3) continuously stirring and reacting until the reaction product is naturally cooled, and obtaining the alkali-free liquid accelerator containing the fluosilicate.
Further, the temperature of the water bath heating is 65-75 ℃.
Further, the stirring rate was 250-350 rpm.
Further, the time interval in the step (2) is 9-11 min.
In the invention, the reaction temperature is limited to 65-75 ℃, because the reaction speed of synthesis is fastest in the temperature range, and if the temperature is too low, the alkali-free liquid accelerator can be obtained in a longer time; if the temperature is too high, it is difficult to exert the desired effect of the organic components such as diethanolamine and triethanolamine.
In the preparation process, the constant temperature is kept in the adding process of each component, after all the raw materials are added, the heating is stopped, and the raw materials are stirred until the raw materials are cooled to the room temperature, namely the reaction is finished.
The use of an alkali-free liquid accelerator comprising a fluorosilicate salt as described above in shotcrete.
Furthermore, the addition amount of the accelerator in the shotcrete is 6-7 wt%.
Compared with the prior art, the invention has the following advantages:
(1) after the accelerator is used, the final setting time of cement is short;
(2) after the quick-setting agent disclosed by the invention is used, the 1d strength of cement mortar is higher;
(3) the accelerator obtained by the invention has good stability under low temperature condition, and is not easy to deteriorate and precipitate.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
In the following examples, the starting products or processing techniques are not specifically described, but are all conventional commercial products or conventional processing techniques in the art.
Example 1
Weighing 46.00 parts of aluminum sulfate, 5.00 parts of magnesium fluosilicate, 2.50 parts of diethanol amine, 0.10 part of triethanolamine, 0.50 part of anhydrous sodium sulphate and 45.90 parts of water; adding aluminum sulfate into a reaction container, pouring water, heating to 70 ℃ in a water bath, and keeping constant temperature; while stirring, sequentially adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate, wherein the addition time interval of each component is 10 minutes; stirring was continued until natural cooling.
Example 2
Weighing 48.00 parts of aluminum sulfate, 6.00 parts of magnesium fluosilicate, 3.50 parts of diethanol amine, 0.20 part of triethanolamine, 2.00 parts of anhydrous sodium sulphate and 40.30 parts of water; adding aluminum sulfate into a reaction container, pouring water, heating to 75 ℃ in a water bath, and keeping constant temperature; while stirring, sequentially adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate, wherein the adding time interval of each component is 11 minutes; stirring was continued until natural cooling.
Example 3
Weighing 50.00 parts of aluminum sulfate, 8.00 parts of magnesium fluosilicate, 4.00 parts of diethanol amine, 0.30 part of triethanolamine, 1.50 parts of anhydrous sodium sulphate and 36.20 parts of water; adding aluminum sulfate into a reaction container, pouring water, heating to 70 ℃ in a water bath, and keeping constant temperature; while stirring, sequentially adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate, wherein the adding time interval of each component is 9 minutes; stirring was continued until natural cooling.
Example 4
Weighing 51.00 parts of aluminum sulfate, 9.00 parts of magnesium fluosilicate, 4.50 parts of diethanol amine, 0.40 part of triethanolamine, 1.00 part of anhydrous sodium sulphate and 34.10 parts of water; adding aluminum sulfate into a reaction container, pouring water, heating to 70 ℃ in a water bath, and keeping constant temperature; while stirring, sequentially adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate, wherein the adding time interval of each component is 9 minutes; stirring was continued until natural cooling.
Example 5
53.00 parts of aluminum sulfate, 12.00 parts of magnesium fluosilicate, 5.00 parts of diethanol amine, 0.50 part of triethanolamine, 1.00 part of anhydrous sodium sulphate and 28.50 parts of water; adding aluminum sulfate into a reaction container, pouring water, heating to 65 ℃ in a water bath, and keeping constant temperature; while stirring, sequentially adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate, wherein the addition time interval of each component is 10 minutes; stirring was continued until natural cooling.
The performance test of the products prepared in the above examples was carried out, the selected cement was the reference cement, the liquid alkali-free setting accelerator was blended in an amount of 6 wt%, and the results are shown in table 1 below.
TABLE 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Initial setting time | 4’20” | 4’10” | 3’20” | 2’50” | 2’30” |
| Final setting time | 8’50” | 5’30” | 6’50” | 7’40” | 7’10” |
| 1d compressive strength/MPa | 11.5 | 10.3 | 9.7 | 8.5 | 7.2 |
| 28d Strength Retention% | 102 | 91 | 97 | 95 | 96 |
For critical conditions that are important to affect the performance of the final accelerator, several comparative examples were designed based on example 2. Wherein, if the raw material products or processing techniques are not specifically mentioned, the raw material products or processing techniques are all conventional commercial products or conventional processing techniques in the field.
Comparative example 1
Compared with the example 2, in the comparative example, no magnesium fluosilicate is added, and the water accounts for 46.30 parts.
Comparative example 2
Compared with example 2, the magnesium fluosilicate in the comparative example is 2.00 parts, and the water is 44.30 parts.
Comparative example 3
Compared with example 2, the magnesium fluosilicate in the comparative example is 15.00 parts, and the water is 31.30 parts.
The performance of the products prepared according to the above proportions is tested, the selected cement is the reference cement, the mixing amount of the liquid alkali-free setting accelerator is 6%, and the obtained results are shown in the following table 2.
TABLE 2
| Example 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Initial setting time | 4’10” | 6’40” | 8’20” | 4’00” |
| Final setting time | 5’30” | 12’50” | 16’50” | 5’10” |
| 1d compressive strength/MPa | 10.3 | 9.7 | 10.0 | 6.2 |
| 28d Strength Retention% | 91 | 98 | 95 | 94 |
The alkali-free liquid accelerator can meet the effect requirement of the current sprayed concrete field on the accelerator, is not easy to precipitate and deteriorate, and has a long shelf life.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. An alkali-free liquid accelerator containing fluorosilicate is characterized by comprising the following components in parts by weight: 46-53 parts of aluminum sulfate, 5-12 parts of magnesium fluosilicate, 2.5-5.0 parts of diethanolamine, 0.1-0.5 part of triethanolamine, 0.5-2.0 parts of anhydrous sodium sulphate and 27.5-45.9 parts of water.
2. The alkali-free liquid accelerator containing fluorosilicate as claimed in claim 1, wherein the accelerator comprises the following components in parts by weight: 46-50 parts of aluminum sulfate, 5-8 parts of magnesium fluosilicate, 2.5-4.0 parts of diethanolamine, 0.1-0.3 part of triethanolamine, 0.5-2.0 parts of anhydrous sodium sulphate and 36.2-45.9 parts of water.
3. The alkali-free liquid accelerator containing fluorosilicate as claimed in claim 2, wherein the accelerator comprises the following components in parts by weight: 48-50 parts of aluminum sulfate, 6-8 parts of magnesium fluosilicate, 3.5-4.0 parts of diethanolamine, 0.2-0.3 part of triethanolamine, 1.5-2.0 parts of anhydrous sodium sulphate and 36.2-40.3 parts of water.
4. The alkali-free liquid accelerator containing fluorosilicate as claimed in claim 3, wherein the accelerator comprises the following components in parts by weight: 48 parts of aluminum sulfate, 6 parts of magnesium fluosilicate, 3.5 parts of diethanolamine, 0.2 part of triethanolamine, 2.0 parts of anhydrous sodium sulphate and 40.3 parts of water.
5. A method for producing an alkali-free liquid accelerator containing a fluorosilicate salt as set forth in any one of claims 1 to 4, which comprises the steps of:
(1) adding aluminum sulfate into a reaction container, pouring water into the reaction container, heating in a water bath, and keeping constant temperature;
(2) under the condition of stirring, sequentially and alternately adding magnesium fluosilicate, diethanol amine, triethanolamine and anhydrous sodium sulphate;
(3) continuously stirring and reacting until the reaction product is naturally cooled, and obtaining the alkali-free liquid accelerator containing the fluosilicate.
6. The method for preparing an alkali-free liquid accelerator containing fluorosilicate as claimed in claim 5, wherein the temperature of the water bath heating is 65-75 ℃.
7. The method for preparing an alkali-free liquid accelerator containing fluorosilicate as claimed in claim 5, wherein the stirring speed is 250-350 rpm.
8. The method for preparing an alkali-free liquid accelerator containing fluorosilicate as claimed in claim 5, wherein the time interval in the step (2) is 9 to 11 min.
9. Use of an alkali-free liquid accelerator containing a fluorosilicate salt as set forth in any one of claims 1 to 4 in shotcrete.
10. The use of the alkali-free liquid accelerator containing fluorosilicate as claimed in claim 9, wherein the accelerator is added to shotcrete in an amount of 6-7 wt%.
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| CN202110425878.XA CN113003976A (en) | 2021-04-20 | 2021-04-20 | Alkali-free liquid accelerator containing fluorosilicate and preparation method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230218A (en) * | 2021-11-26 | 2022-03-25 | 光明铁道控股有限公司 | Concrete additive with coagulation promoting effect and preparation method thereof |
| CN114804703A (en) * | 2022-03-21 | 2022-07-29 | 广东建盛高新材料有限公司 | Alkali-free accelerator and preparation method and application thereof |
| CN115872662A (en) * | 2022-06-16 | 2023-03-31 | 桂林理工大学 | Liquid alkali-free accelerator for sprayed concrete and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004035387A (en) * | 2002-06-17 | 2004-02-05 | Mbt Holding Ag | Admixture |
| JP2007031166A (en) * | 2005-07-22 | 2007-02-08 | Denki Kagaku Kogyo Kk | Spray material and spray construction method using the same |
| CN102923988A (en) * | 2012-11-29 | 2013-02-13 | 北京冶建特种材料有限公司 | Liquid alkali-free chloride-free accelerating agent as well as methods for preparing and using same |
| CN107200496A (en) * | 2017-07-17 | 2017-09-26 | 云南峰高新材料有限公司 | A kind of environment-friendly type alkali-free accelerator and preparation method thereof |
| 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 |
-
2021
- 2021-04-20 CN CN202110425878.XA patent/CN113003976A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004035387A (en) * | 2002-06-17 | 2004-02-05 | Mbt Holding Ag | Admixture |
| JP2007031166A (en) * | 2005-07-22 | 2007-02-08 | Denki Kagaku Kogyo Kk | Spray material and spray construction method using the same |
| CN102923988A (en) * | 2012-11-29 | 2013-02-13 | 北京冶建特种材料有限公司 | Liquid alkali-free chloride-free accelerating agent as well as methods for preparing and using same |
| CN107200496A (en) * | 2017-07-17 | 2017-09-26 | 云南峰高新材料有限公司 | A kind of environment-friendly type alkali-free accelerator and preparation method thereof |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 黄家骏: "《建筑材料与检测技术》", 30 September 2000, 武汉理工大学出版社 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230218A (en) * | 2021-11-26 | 2022-03-25 | 光明铁道控股有限公司 | Concrete additive with coagulation promoting effect and preparation method thereof |
| CN114230218B (en) * | 2021-11-26 | 2022-09-27 | 光明铁道控股有限公司 | Concrete additive with coagulation promoting effect and preparation method thereof |
| CN114804703A (en) * | 2022-03-21 | 2022-07-29 | 广东建盛高新材料有限公司 | Alkali-free accelerator and preparation method and application thereof |
| CN114804703B (en) * | 2022-03-21 | 2022-12-23 | 广东建盛高新材料有限公司 | Alkali-free accelerator and preparation method and application thereof |
| CN115872662A (en) * | 2022-06-16 | 2023-03-31 | 桂林理工大学 | Liquid alkali-free accelerator for sprayed concrete and preparation method thereof |
| CN115872662B (en) * | 2022-06-16 | 2024-04-26 | 桂林理工大学 | Liquid alkali-free accelerator for sprayed concrete and preparation method thereof |
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