CN108911555A - A kind of gunite concrete alkali-free chlorine-free liquid accelerator and preparation method thereof - Google Patents
A kind of gunite concrete alkali-free chlorine-free liquid accelerator and preparation method thereof Download PDFInfo
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- CN108911555A CN108911555A CN201810869141.5A CN201810869141A CN108911555A CN 108911555 A CN108911555 A CN 108911555A CN 201810869141 A CN201810869141 A CN 201810869141A CN 108911555 A CN108911555 A CN 108911555A
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- Prior art keywords
- free
- alkali
- added
- reaction vessel
- gunite concrete
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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
Abstract
The invention discloses a kind of gunite concrete alkali-free chlorine-free liquid accelerators, it by being respectively that 25 ~ 55% aluminum sulfate, 5 ~ 10% aluminium hydroxides, 14 ~ 20% inorganic acids, 0.1 ~ 0.5% stabilizer, 1 ~ 3% organic early strength agent, 0.1 ~ 0.5%PH regulator and water form by weight percentage；It also discloses the preparation method of alkali-free chlorine-free liquid accelerator.The beneficial effects of the invention are as follows：The injury to construction personnel is reduced, is reduced or avoided to late strength of concrete loss, preparation section is few, will not pollute construction area ambient enviroment.
Description
Technical field
The present invention relates to a kind of gunite concrete alkali-free chlorine-free liquid accelerators and preparation method thereof.
Background technique
Accelerator can substantially be divided into alkaline powdery, alkali-free powdery, alkali liquid and alkali-free liquid according to property and state
Four major class.China's most of accelerators produced are to have alkali accelerator at present, although being able to achieve coagulation in use
The rapid condensation of soil, but because wherein containing the alkaline matters such as sodium aluminate, sodium carbonate and quick lime, have to human body different degrees of
Injury, and will cause alkali, concrete structure is destroyed, causes late strength of concrete retention rate lower, after
Generally 30%~40%, pulvis accelerator can also pollute in construction area ambient enviroment for phase loss of strength.Therefore accelerator liquid
State, without alkalize it is imperative.Bring is a series of when wherein the use of liquid accelerating agent can eliminate powder accelerator construction
Problem, such as reduce rebound, reduce dust；The use of alkali-free quick-coagulant can reduce the injury to construction personnel, can also subtract
Less or avoid the loss of late strength of concrete.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, and providing a kind of reduce to the injury of construction personnel, reduces
Or avoid late strength of concrete loss, preparation section is few, will not pollute the gunite concrete nothing of construction area ambient enviroment
Alkali is without chlorine liquid accelerator and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions：A kind of gunite concrete alkali-free chlorine-free liquid rapid hardening
Agent, it by by weight percentage be respectively 25~55% aluminum sulfate, 5~10% aluminium hydroxides, 14~20% inorganic acids, 0.1~
0.5% stabilizer, 1~3% organic early strength agent, 0.1~0.5%PH regulator and water composition.
The inorganic acid is hydrofluoric acid.
The stabilizer is any one or more in EDTA, EDTP, hydroxycarboxylic acid, citric acid and salicylic acid.
Organic early strength agent is any one or more in diethanol amine, triethanolamine and triisopropanolamine.
The PH regulator is ammonium hydroxide.
The preparation method of gunite concrete alkali-free chlorine-free liquid accelerator, it includes the following steps：
Under S1, room temperature, by weight percentage, water and aluminium hydroxide are added into plastics reaction vessel, and apply stirring
Until solution is in milky white suspended state；
S2, hydrofluoric acid equivalent is divided into two parts under continuous stirring, first part of hydrofluoric acid, hydrogen is first added into reaction vessel
Aluminium oxide and hydrofluoric acid occur chemical reaction and generate HAlF4Or H3AlF6Complex acid and be partly dissolved, simultaneous reactions release heat
Amount, through being 50~60 DEG C with the temperature of thermometer measure mixed liquor；
Second part of hydrofluoric acid is added in reaction vessel under continuous stirring after S3,3~5min, further hydrogen after reaction
Aluminium oxide is completely dissolved, the colorless and transparent state of solution after dissolution, through being 80~90 DEG C with the temperature of thermometer measure mixed liquor；
After S4, step S3, aluminum sulfate is added into reaction vessel under lasting stirring, until aluminum sulfate is completely dissolved；
Temperature when being down to 40~50 DEG C of S5, liquid to be mixed, every 10min be successively added into reaction vessel stabilizer and
Organic early strength agent；
PH regulator is added into reaction vessel after liquid natural cooling to be mixed under S6, lasting stirring, when stirring evenly, most
Obtained alkali-free chlorine-free liquid accelerator eventually.
The present invention has the following advantages that：
1, alkali-free chlorine-free liquid accelerator prepared by the present invention, not only alkali-free, also meets free from chloride requirement, thus will not be right
Skin causes to corrode；It, can be with while reducing late strength of concrete loss due to the presence of not no alkaline matter
Reduce the corrosion to concrete reinforcing steel；
2, volume is low, and setting time is fast, and alkali-free chlorine-free liquid accelerator of the invention is able to satisfy under 4% volume
JC477-2005《Gunite concrete accelerator》Standard Grade A technical requirements；
3, production cost is low, simple process, can produce at normal temperature, safety and environmental protection, have good social benefit and
Economic benefit；
4, the stabilizer being added in accelerator makes the retention period of product more than 6 months, in stable condition, and being long placed in is not in point
Layer, precipitating；
5, the organic amine solubilising early strength agent being added in accelerator, organic amine are conducive to improve early strength of concrete, reduce
28d loss of strength, while the solubility of aluminum sulfate can also be improved；
6, pH value is controlled 3 or so, is avoided in work progress at the scene because of alkali-free by the PH regulator being added in accelerator
Accelerator is acid too strong to causing to corrode at concrete spraying machine gun slot.
Specific embodiment
The present invention will be further described below, and protection scope of the present invention is not limited to as described below：
Embodiment one：A kind of gunite concrete alkali-free chlorine-free liquid accelerator, it by being respectively by weight percentage
25% aluminum sulfate, 5% aluminium hydroxide, 14% inorganic acid, 0.1% stabilizer, 1% organic early strength agent, 0.1%PH regulator and
Water composition.
The inorganic acid is hydrofluoric acid, and hydrofluoric acid can react with aluminium hydroxide and generate HAlF4Or H3AlF6Similar
Complex acid.
The stabilizer is any one or more in EDTA, EDTP, hydroxycarboxylic acid, citric acid and salicylic acid, stabilizer
For the limit that extends storage period, guarantee that product is stored for a long time without there is layering, precipitating.
Organic early strength agent is any one or more in diethanol amine, triethanolamine and triisopropanolamine, hydramine energy
Enough promote the development of early strength of concrete.In addition, hydramine can also generate water-soluble complex compound with the aluminium ion in solution,
To improve the solubility of aluminum sulfate, it is also beneficial to the raising of alkali-free quick-coagulant product pH value to a certain extent.
The PH regulator is ammonium hydroxide, and ammonium hydroxide can adjust product pH value, avoid in the construction process because of alkali-free rapid hardening
Agent is acid too strong to causing to corrode at concrete spraying machine gun slot.
The preparation method of gunite concrete alkali-free chlorine-free liquid accelerator, it includes the following steps：
Under S1, room temperature, by weight percentage, water and aluminium hydroxide are added into plastics reaction vessel, and apply stirring
Until solution is in milky white suspended state；
S2, hydrofluoric acid equivalent is divided into two parts under continuous stirring, first part of hydrofluoric acid, hydrogen is first added into reaction vessel
Aluminium oxide and hydrofluoric acid occur chemical reaction and generate HAlF4Or H3AlF6Complex acid and be partly dissolved, simultaneous reactions release heat
Amount, through being 50 DEG C with the temperature of thermometer measure mixed liquor；
Second part of hydrofluoric acid is added in reaction vessel under continuous stirring after S3,3min, further hydrogen-oxygen after reaction
Change aluminium to be completely dissolved, the colorless and transparent state of solution after dissolution, through being 80 DEG C with the temperature of thermometer measure mixed liquor；
After S4, step S3, aluminum sulfate is added into reaction vessel under lasting stirring, until aluminum sulfate is completely dissolved；
Stabilizer and organic is successively added every 10min in temperature when being down to 40 DEG C of S5, liquid to be mixed into reaction vessel
Early strength agent；
PH regulator is added into reaction vessel after liquid natural cooling to be mixed under S6, lasting stirring, when stirring evenly, most
Obtained alkali-free chlorine-free liquid accelerator eventually.
Embodiment two：A kind of gunite concrete alkali-free chlorine-free liquid accelerator, it by being respectively by weight percentage
40% aluminum sulfate, 8% aluminium hydroxide, 16% inorganic acid, 0.3% stabilizer, 2% organic early strength agent, 0.3%PH regulator and
Water composition.
The preparation method of gunite concrete alkali-free chlorine-free liquid accelerator, it includes the following steps：
Under S1, room temperature, by weight percentage, water and aluminium hydroxide are added into plastics reaction vessel, and apply stirring
Until solution is in milky white suspended state；
S2, hydrofluoric acid equivalent is divided into two parts under continuous stirring, first part of hydrofluoric acid, hydrogen is first added into reaction vessel
Aluminium oxide and hydrofluoric acid occur chemical reaction and generate HAlF4Or H3AlF6Complex acid and be partly dissolved, simultaneous reactions release heat
Amount, through being 55 DEG C with the temperature of thermometer measure mixed liquor；
Second part of hydrofluoric acid is added in reaction vessel under continuous stirring after S3,4min, further hydrogen-oxygen after reaction
Change aluminium to be completely dissolved, the colorless and transparent state of solution after dissolution, through being 85 DEG C with the temperature of thermometer measure mixed liquor；
After S4, step S3, aluminum sulfate is added into reaction vessel under lasting stirring, until aluminum sulfate is completely dissolved；
Stabilizer and organic is successively added every 10min in temperature when being down to 45 DEG C of S5, liquid to be mixed into reaction vessel
Early strength agent；
PH regulator is added into reaction vessel after liquid natural cooling to be mixed under S6, lasting stirring, when stirring evenly, most
Obtained alkali-free chlorine-free liquid accelerator eventually.
Embodiment three：A kind of gunite concrete alkali-free chlorine-free liquid accelerator, it by being respectively by weight percentage
55% aluminum sulfate, 10% aluminium hydroxide, 20% inorganic acid, 0.5% stabilizer, 3% organic early strength agent, 0.5%PH regulator with
And water composition.
The preparation method of gunite concrete alkali-free chlorine-free liquid accelerator, it includes the following steps：
Under S1, room temperature, by weight percentage, water and aluminium hydroxide are added into plastics reaction vessel, and apply stirring
Until solution is in milky white suspended state；
S2, hydrofluoric acid equivalent is divided into two parts under continuous stirring, first part of hydrofluoric acid, hydrogen is first added into reaction vessel
Aluminium oxide and hydrofluoric acid occur chemical reaction and generate HAlF4Or H3AlF6Complex acid and be partly dissolved, simultaneous reactions release heat
Amount, through being 60 DEG C with the temperature of thermometer measure mixed liquor；
Second part of hydrofluoric acid is added in reaction vessel under continuous stirring after S3,5min, further hydrogen-oxygen after reaction
Change aluminium to be completely dissolved, the colorless and transparent state of solution after dissolution, through being 90 DEG C with the temperature of thermometer measure mixed liquor；
After S4, step S3, aluminum sulfate is added into reaction vessel under lasting stirring, until aluminum sulfate is completely dissolved；
Stabilizer and organic is successively added every 10min in temperature when being down to 50 DEG C of S5, liquid to be mixed into reaction vessel
Early strength agent；
PH regulator is added into reaction vessel after liquid natural cooling to be mixed under S6, lasting stirring, when stirring evenly, most
Obtained alkali-free chlorine-free liquid accelerator eventually.
It is as shown in table 1 different aluminum sulfate, aluminium hydroxide, hydrofluoric acid, stabilizer, organic early strength agent PH regulator composition
Five kinds of alkali-free chlorine-free liquid accelerators.
Table 1
According to GB/T8077-2012《Methods for testing uniformity of concrete admixture》Alkali content, the chloride ion of test product
Content and pH value, according to JC477-2005《Gunite concrete accelerator》Test method uses " Lafarge " board 42.5 general
Logical portland cement mixes five kinds of alkali-free chlorine-free liquid accelerators in table 1 by the 3%~4% of cement weight, to test water respectively
The setting time of mud and compression strength, test result are as shown in table 2：
Table 2
As can be seen from the above table, chlorine-free alkali-free liquid accelerator prepared by the present invention at low dosage (3%~
4%) it just can satisfy JC477-2005《Gunite concrete accelerator》Professional standard, 4% volume can reach Grade A
It is required that.The early strength and 28 days compressive strength rates that promote gunite concrete are also had obvious effects on simultaneously, therefore the product
It can effectively reduce or avoid to lose late strength of concrete.Furthermore the product is liquid, will not pollute and apply in work progress
Work area domain ambient enviroment.
Claims (6)
1. a kind of gunite concrete alkali-free chlorine-free liquid accelerator, it is characterised in that：It by by weight percentage be respectively 25 ~
55% aluminum sulfate, 5 ~ 10% aluminium hydroxides, 14 ~ 20% inorganic acids, 0.1 ~ 0.5% stabilizer, 1 ~ 3% organic early strength agent, 0.1 ~ 0.5%PH
Regulator and water composition.
2. a kind of gunite concrete alkali-free chlorine-free liquid accelerator according to claim 1, it is characterised in that：The nothing
Machine acid is hydrofluoric acid.
3. a kind of gunite concrete alkali-free chlorine-free liquid accelerator according to claim 1, it is characterised in that：It is described steady
Determining agent is any one or more in EDTA, EDTP, hydroxycarboxylic acid, citric acid and salicylic acid.
4. a kind of gunite concrete alkali-free chlorine-free liquid accelerator according to claim 1, it is characterised in that：It is described to have
Machine early strength agent is any one or more in diethanol amine, triethanolamine and triisopropanolamine.
5. a kind of gunite concrete alkali-free chlorine-free liquid accelerator according to claim 1, it is characterised in that：The PH
Regulator is ammonium hydroxide.
6. the preparation method of alkali-free chlorine-free liquid accelerator of gunite concrete described according to claim 1 ~ any one of 5,
It is characterized in that：It includes the following steps：
Under S1, room temperature, by weight percentage, water and aluminium hydroxide are added into plastics reaction vessel, and apply stirring until
Solution is in milky white suspended state；
S2, hydrofluoric acid equivalent is divided into two parts under continuous stirring, first part of hydrofluoric acid, hydroxide is first added into reaction vessel
Aluminium and hydrofluoric acid occur chemical reaction and generate HAlF4Or H3AlF6Complex acid and be partly dissolved, simultaneous reactions release heat, warp
It is 50 ~ 60 DEG C with the temperature of thermometer measure mixed liquor；
Second part of hydrofluoric acid is added in reaction vessel under continuous stirring after S3,3 ~ 5min, further hydroxide after reaction
Aluminium is completely dissolved, the colorless and transparent state of solution after dissolution, through being 80 ~ 90 DEG C with the temperature of thermometer measure mixed liquor；
After S4, step S3, aluminum sulfate is added into reaction vessel under lasting stirring, until aluminum sulfate is completely dissolved；
Stabilizer and organic is successively added every 10min in temperature when being down to 40 ~ 50 DEG C of S5, liquid to be mixed into reaction vessel
Early strength agent；
PH regulator is added into reaction vessel after liquid natural cooling to be mixed under S6, lasting stirring, it is final to make when stirring evenly
Obtain alkali-free chlorine-free liquid accelerator.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218019A (en) * | 2019-07-22 | 2019-09-10 | 山东交通学院 | Early high-strength compound alkali-free liquid accelerator, preparation method and gunite concrete |
| CN110734242A (en) * | 2019-11-13 | 2020-01-31 | 中国建材检验认证集团厦门宏业有限公司 | sprayed concrete alkali-free liquid accelerator for alpine regions and preparation method thereof |
| CN111003964A (en) * | 2019-12-30 | 2020-04-14 | 四川恒泽建材有限公司 | Alkali-free liquid accelerator and production process thereof |
| CN111606595A (en) * | 2020-06-10 | 2020-09-01 | 竹鹏翔 | Preparation method of alkali-free liquid accelerator |
| CN112225486A (en) * | 2020-10-19 | 2021-01-15 | 湖南加美乐素新材料股份有限公司 | Stable alkali-free liquid accelerator and preparation method and application thereof |
| CN112745056A (en) * | 2021-01-14 | 2021-05-04 | 佛山市凯隽新建材科技有限公司 | Suspension type alkali-free liquid accelerator and preparation method thereof |
| CN116161892A (en) * | 2021-11-24 | 2023-05-26 | 中国科学院过程工程研究所 | Alkali-free concrete accelerator and preparation method and application method thereof |
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| CN104193211A (en) * | 2014-08-18 | 2014-12-10 | 刘翠芬 | Heating-free non-alkali liquid accelerator for jetting concrete and preparation method of heating-free non-alkali liquid accelerator |
| CN105384376A (en) * | 2015-11-06 | 2016-03-09 | 湖北工业大学 | Preparing method for high-aluminum-content alkali-free chloride-free setting accelerator |
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| CN103819117A (en) * | 2014-01-08 | 2014-05-28 | 洛阳理工学院 | Alkali-free chloride-free liquid concrete enhancer and preparation method thereof |
| CN104193211A (en) * | 2014-08-18 | 2014-12-10 | 刘翠芬 | Heating-free non-alkali liquid accelerator for jetting concrete and preparation method of heating-free non-alkali liquid accelerator |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218019A (en) * | 2019-07-22 | 2019-09-10 | 山东交通学院 | Early high-strength compound alkali-free liquid accelerator, preparation method and gunite concrete |
| CN110734242A (en) * | 2019-11-13 | 2020-01-31 | 中国建材检验认证集团厦门宏业有限公司 | sprayed concrete alkali-free liquid accelerator for alpine regions and preparation method thereof |
| CN110734242B (en) * | 2019-11-13 | 2021-08-03 | 中国建材检验认证集团厦门宏业有限公司 | Sprayed concrete alkali-free liquid accelerator for alpine regions and preparation method thereof |
| CN111003964A (en) * | 2019-12-30 | 2020-04-14 | 四川恒泽建材有限公司 | Alkali-free liquid accelerator and production process thereof |
| CN111003964B (en) * | 2019-12-30 | 2021-11-30 | 四川恒泽建材有限公司 | Alkali-free liquid accelerator and production process thereof |
| CN111606595A (en) * | 2020-06-10 | 2020-09-01 | 竹鹏翔 | Preparation method of alkali-free liquid accelerator |
| CN112225486A (en) * | 2020-10-19 | 2021-01-15 | 湖南加美乐素新材料股份有限公司 | Stable alkali-free liquid accelerator and preparation method and application thereof |
| CN112745056A (en) * | 2021-01-14 | 2021-05-04 | 佛山市凯隽新建材科技有限公司 | Suspension type alkali-free liquid accelerator and preparation method thereof |
| CN112745056B (en) * | 2021-01-14 | 2021-09-21 | 佛山市凯隽新建材科技有限公司 | Suspension type alkali-free liquid accelerator and preparation method thereof |
| CN116161892A (en) * | 2021-11-24 | 2023-05-26 | 中国科学院过程工程研究所 | Alkali-free concrete accelerator and preparation method and application method thereof |
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