CN111574093A - High-performance alkali-free liquid accelerator and preparation method thereof - Google Patents
High-performance alkali-free liquid accelerator and preparation method thereof Download PDFInfo
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- CN111574093A CN111574093A CN202010440668.3A CN202010440668A CN111574093A CN 111574093 A CN111574093 A CN 111574093A CN 202010440668 A CN202010440668 A CN 202010440668A CN 111574093 A CN111574093 A CN 111574093A
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- parts
- free liquid
- liquid accelerator
- alkali
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Classifications
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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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a high-performance alkali-free liquid accelerator which is prepared from the following raw materials in parts by weight: 450 parts of aluminum sulfate, 60-80 parts of magnesium sulfate, 5 parts of triethanolamine, 3 parts of sepiolite, 10 parts of diethanolamine and 472 parts of water. The invention improves the defects of the traditional accelerator and improves the comprehensive use performance of the accelerator.
Description
Technical Field
The invention relates to the technical field of accelerating agents, and particularly relates to a high-performance alkali-free liquid accelerating agent and a preparation method thereof.
Background
The accelerating agent is an additive which is added into the concrete and can make the concrete quickly set and harden. The main types of the concrete are inorganic salts and organic matters, and the concrete is a powdery solid, the cement hydration hardening is accelerated, the sufficient strength is formed in a short time, the mixing amount of the solid is only 2% -3% of the cement amount in the concrete, but the concrete can be initially set within 5min and set within 12min, so that the aim of quickly setting the concrete in rush repairs or roadways is fulfilled, the concrete is an indispensable additive in a sprayed concrete construction method, and the requirement of special construction is met. The common accelerating agent in the market at present mainly has the defects of strong corrosivity, low later-stage hardness, large dust and the like, and has poor comprehensive use performance. The invention researches an alkali-free liquid accelerator special for cement, obviously shortens the accelerating time, has no corrosivity on non-concrete, and reduces dust pollution.
Disclosure of Invention
The invention aims to provide a high-performance alkali-free liquid accelerator which is suitable for the field of wet-sprayed concrete.
In order to achieve the purpose, the invention provides the following technical scheme: a high-performance alkali-free liquid accelerator is prepared from the following raw materials in parts by mass: 450 parts of aluminum sulfate, 60-80 parts of magnesium sulfate, 5 parts of triethanolamine, 3 parts of sepiolite, 10 parts of diethanolamine and 472 parts of water.
Further, magnesium sulfate was 80 parts in winter, and 60 parts in the remaining seasons. The addition of 20 parts is increased along with the change of seasons, thereby playing the role of adjusting the viscosity.
The invention also aims to provide a preparation method for the high-performance alkali-free liquid accelerator.
In order to achieve the purpose, the invention provides the following technical scheme: a process for preparing the high-performance alkali-free liquid accelerator includes such steps as mixing water with aluminium sulfate, stirring for 0.5 hr, adding sepiolite, stirring for half an hour, sequentially adding diethanolamine and triethanolamine, stirring for 2.5 hr, regulating pH value to 2 or more, stirring for 20 min and discharging.
Furthermore, the pH value of the solution is adjusted to be more than 2 by using triethanolamine.
The invention has the following technical effects:
1. no alkali and no corrosion, the content of alkaline substances is not more than 0.1 percent, and the concrete has no corrosion.
2. The strength of the concrete exceeds the national standard by 15MPa in one day, the stability is greatly enhanced, the durability of the concrete is improved, and the sprayed concrete can be designed into single-layer permanent support concrete. 3. The quick setting accelerator has no precipitation, can not cause work interruption caused by pipeline blockage, can be uniformly mixed in concrete, fully embodies the characteristic of quick setting, and solves the precipitation problem of the prior alkali-free quick setting accelerator. 4. The later strength is high, not only meets the initial and final setting time and enables the later strength of the concrete to exceed the national standard, but also has the function of micro-compensation shrinkage and can effectively prevent cracking after injection molding.
5. The mixing amount is 6-9%, and the dosage has obvious quick setting effect and short initial and final setting interval time. 6. Quick setting, the thickness of the top layer sprayed once can reach 150-. 7. Low resilience, namely the resilience rate is lower than 10 percent, the loss of 10 to 15 percent is reduced, the thickness of a spraying layer is increased, materials are saved, and the working efficiency is improved. 8. The method has the advantages of replacing a double-layer construction mode of supporting first and lining later, reducing the supporting thickness, saving expensive lining formwork cost and saving engineering investment.
9. The triethanolamine and the diethanolamine adopt a compound mode, so that the stability and the pH value of the product can be adjusted, and the adaptability of the product is improved; the sepiolite is combined with aluminum ions in aluminum sulfate in the product, so that the solubility of the aluminum sulfate is improved, and the stability of the product is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A high-performance alkali-free liquid accelerator is prepared from the following raw materials in parts by weight: 450 parts of aluminum sulfate, 60-80 parts of magnesium sulfate, 5 parts of triethanolamine, 3 parts of sepiolite, 10 parts of diethanolamine and 472 parts of water.
The magnesium sulfate is 80 parts in winter, and 60 parts in the rest seasons. The dosage is changed correspondingly with the change of seasons, and 20 parts more in winter, thereby playing the role of adjusting the viscosity.
Preferably, one part is 1kg, and the feed is prepared from the following raw materials in parts by weight: 450kg of aluminum sulfate, 5kg of triethanolamine, 3kg of sepiolite, 10kg of diethanolamine, 472kg of water and 80-60kg of magnesium sulfate, the specific dosage is correspondingly adjusted according to different seasons, and 20kg of aluminum sulfate is added in winter to play a role in adjusting the viscosity.
A preparation method of the high-performance alkali-free liquid accelerator comprises the following steps of mixing water and aluminum sulfate, stirring for 0.5 hour, adding sepiolite, stirring for 0.5 hour again, sequentially and simultaneously adding diethanolamine and triethanolamine, stirring for 2.5 hours, adjusting the pH value of the solution to be more than 2 by using the triethanolamine, stirring for 20 minutes, and discharging.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (4)
1. The high-performance alkali-free liquid accelerator is characterized by being prepared from the following raw materials in parts by mass: 450 parts of aluminum sulfate, 60-80 parts of magnesium sulfate, 5 parts of triethanolamine, 3 parts of sepiolite, 10 parts of diethanolamine and 472 parts of water.
2. The high-performance alkali-free liquid accelerator as claimed in claim 1, wherein the magnesium sulfate is 80 parts in winter and 60 parts in the rest of seasons.
3. A preparation method of a high-performance alkali-free liquid accelerator is characterized by mixing water and aluminum sulfate, stirring for 0.5 hour, adding sepiolite, stirring for 0.5 hour again, simultaneously adding diethanolamine and triethanolamine, stirring for 2.5 hours, adjusting the pH value of the solution to be more than 2, stirring for 20 minutes, and discharging.
4. The method for preparing the alkali-free liquid accelerator as claimed in claim 3, wherein triethanolamine is used to adjust the pH of the solution to 2 or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010440668.3A CN111574093A (en) | 2020-05-22 | 2020-05-22 | High-performance alkali-free liquid accelerator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010440668.3A CN111574093A (en) | 2020-05-22 | 2020-05-22 | High-performance alkali-free liquid accelerator and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111574093A true CN111574093A (en) | 2020-08-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010440668.3A Pending CN111574093A (en) | 2020-05-22 | 2020-05-22 | High-performance alkali-free liquid accelerator and preparation method thereof |
Country Status (1)
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| CN (1) | CN111574093A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185177A (en) * | 2021-05-14 | 2021-07-30 | 山西佳维新材料股份有限公司 | Alkali-free fluorine-free chlorine-free accelerator and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974466A (en) * | 2006-12-07 | 2007-06-06 | 江苏博特新材料有限公司 | Alkali-free liquid setting accelerator for spray concrete |
| CN101648785A (en) * | 2009-09-14 | 2010-02-17 | 江苏博特新材料有限公司 | Alkali-free liquid setting accelerator |
| CN102079642A (en) * | 2009-11-26 | 2011-06-01 | 沈阳工业大学 | Novel liquid alkali-free accelerator for gunite concrete |
| CN102249592A (en) * | 2011-06-01 | 2011-11-23 | 中国水利水电科学研究院 | Alkali-free chlorine-free high-early-strength liquid accelerator and preparation method thereof |
| 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 |
| CN106336141A (en) * | 2016-08-23 | 2017-01-18 | 唐山市龙亿科技开发有限公司 | High-stability alkali-free chloride-free liquid accelerator and preparation method thereof |
| CN110204238A (en) * | 2019-06-12 | 2019-09-06 | 云南凯威特新材料股份有限公司 | A kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof |
-
2020
- 2020-05-22 CN CN202010440668.3A patent/CN111574093A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974466A (en) * | 2006-12-07 | 2007-06-06 | 江苏博特新材料有限公司 | Alkali-free liquid setting accelerator for spray concrete |
| CN101648785A (en) * | 2009-09-14 | 2010-02-17 | 江苏博特新材料有限公司 | Alkali-free liquid setting accelerator |
| CN102079642A (en) * | 2009-11-26 | 2011-06-01 | 沈阳工业大学 | Novel liquid alkali-free accelerator for gunite concrete |
| CN102249592A (en) * | 2011-06-01 | 2011-11-23 | 中国水利水电科学研究院 | Alkali-free chlorine-free high-early-strength liquid accelerator and preparation method thereof |
| 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 |
| CN106336141A (en) * | 2016-08-23 | 2017-01-18 | 唐山市龙亿科技开发有限公司 | High-stability alkali-free chloride-free liquid accelerator and preparation method thereof |
| CN110204238A (en) * | 2019-06-12 | 2019-09-06 | 云南凯威特新材料股份有限公司 | A kind of water-soluble powdery alkali-free quick-coagulant and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185177A (en) * | 2021-05-14 | 2021-07-30 | 山西佳维新材料股份有限公司 | Alkali-free fluorine-free chlorine-free accelerator and preparation method and application thereof |
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Application publication date: 20200825 |