CN105271911B - A kind of alkali-free liquid accelerator and preparation method thereof - Google Patents
A kind of alkali-free liquid accelerator and preparation method thereof Download PDFInfo
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- CN105271911B CN105271911B CN201510637362.6A CN201510637362A CN105271911B CN 105271911 B CN105271911 B CN 105271911B CN 201510637362 A CN201510637362 A CN 201510637362A CN 105271911 B CN105271911 B CN 105271911B
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- 239000007788 liquid Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 34
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 20
- CBOCVOKPQGJKKJ-UHFFFAOYSA-L Calcium formate Chemical compound [Ca+2].[O-]C=O.[O-]C=O CBOCVOKPQGJKKJ-UHFFFAOYSA-L 0.000 claims abstract description 19
- 239000004281 calcium formate Substances 0.000 claims abstract description 19
- 229940044172 calcium formate Drugs 0.000 claims abstract description 19
- 235000019255 calcium formate Nutrition 0.000 claims abstract description 19
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 17
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 13
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 13
- 239000001923 methylcellulose Substances 0.000 claims abstract description 13
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 13
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229940008099 dimethicone Drugs 0.000 claims abstract description 9
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 9
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims abstract description 9
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000004615 ingredient Substances 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 102000004160 Phosphoric Monoester Hydrolases Human genes 0.000 claims description 5
- 108090000608 Phosphoric Monoester Hydrolases Proteins 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 abstract description 12
- 239000004568 cement Substances 0.000 abstract description 8
- KBIWNQVZKHSHTI-UHFFFAOYSA-N 4-n,4-n-dimethylbenzene-1,4-diamine;oxalic acid Chemical compound OC(=O)C(O)=O.CN(C)C1=CC=C(N)C=C1 KBIWNQVZKHSHTI-UHFFFAOYSA-N 0.000 abstract description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Natural products OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract description 4
- 229920001451 polypropylene glycol Polymers 0.000 abstract description 4
- 230000009972 noncorrosive effect Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 229910001413 alkali metal ion Inorganic materials 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 13
- 239000003513 alkali Substances 0.000 description 12
- 235000010981 methylcellulose Nutrition 0.000 description 11
- 239000004567 concrete Substances 0.000 description 10
- 238000011160 research Methods 0.000 description 4
- 239000011378 shotcrete Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 244000248349 Citrus limon Species 0.000 description 2
- 235000005979 Citrus limon Nutrition 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- KUKFKAPJCRZILJ-UHFFFAOYSA-N prop-2-enenitrile;prop-2-enoic acid Chemical compound C=CC#N.OC(=O)C=C KUKFKAPJCRZILJ-UHFFFAOYSA-N 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention discloses a kind of alkali-free liquid accelerator and preparation method thereof, the mass fraction of accelerator component and each component is as follows：30~60 parts of aluminum sulfate, 5~10 parts of calcium formate, 1.0~3.5 parts of methylcellulose, 0.8~1.5 part of polyacrylamide, 0.2~1.0 part of organic acid, 1~3 part of triethanolamine, 0.15~1.08 part of antifoaming agent, 0.5~1.5 part of phosphoric acid, 30~50 parts of water.The organic acid is citric acid or ethanedioic acid.The antifoaming agent is dimethicone or polypropylene glycol.The alkali-free liquid accelerator of the present invention is without alkali metal ion, and non-corrosive and penetrating odor, stable quality, adaptability is good, and volume is low, and rate of set is fast and intensity is high.In volume 1%~3% cement can be made pre-hardening in 2min, the final set in 5min；And there is good storage stability under the conditions of 10 DEG C~45 DEG C.
Description
Technical field
The invention belongs to technical field of concrete additives, and in particular to a kind of alkali-free liquid accelerator and its preparation side
Method.
Background technology
Accelerator is the additive for hardening cement concrete rapid condensation.The main purpose for mixing accelerator is to increase spray
Jetting thickness of concrete is penetrated, shortens the time interval between spraying 2 times, improves the early strength of gunite concrete, so as to
Supporting drag is provided in time.Since the 30's of last century since production and use, accelerator is by it in rapid hardening, early strong side
Face outstanding feature has become one of gunite concrete important composition material.In particular with underground engineering quantity and rule
The difference of increase and the effect of mould, composition material of the accelerator as concrete is not only quite important, but also some specific
Engineering more seems indispensable, is widely used in water conservancy, traffic, mining and part and salvages.Accelerator species is various, root
According to the property and state of accelerator, it can substantially be divided into alkaline powdery, 4 major class of alkali-free powdery, alkali liquid and alkali-free liquid.
There are following problems for alkaline powdery and alkali liquid accelerator (commonly referred to as " traditional accelerator "): ①
Later strength loss is big；2. on the one hand higher alkali content causes the corrosion to construction personnel, health, the opposing party are damaged
Face may also cause alkali-aggregate reaction in concrete, and concrete strength and durability is caused to decline；3. airborne dust is more, springback capacity is big；
4. it is not easy to Wet-mix for Shotcrete operation etc..It is universal in the construction process although its alkali content of alkali-free powder accelerator is low
In the presence of adding the problem of uneven and dust is big.In recent years, high-alkali powder accelerator is researched and developed and gradually decreased using proportion.Liquid
(commonly referred to as " new accelerator ") it can effectively overcome the above-mentioned of the high-alkali accelerator of powdery without (low) alkali concrete accelerator
Problem just progressively substitutes the high-alkali accelerator of conventional powdered.
External liquid is quite extensive without the application of (low) alkali accelerator, especially in developed countries such as Japan, Europe
It there's almost no alkaline accelerator.Research and application of the domestic liquid without (low) alkali accelerator are from the 90's Mos of 20th century
Phase starting, due to its significant performance advantage and the needs of domestic gunite concrete engineering development, quickly grow in recent years, such as
The MJ- that Beijing shaft building for the 8604 low alkali accelerators, China Coal Research Institute that metallurgical construction research institute develops is developed
2000 alkali-free quick-coagulants；In terms of the development of organic-inorganic composite accelerator, such as China Coal Research Institute Beijing shaft building institute once
It studied and subtracting for sodium carboxymethylcellulose is played that dustfall agent and inorganic setting accelerator are compound, Chenguang Chemical Inst., Ministry of Chemical Industry is studied makes
Used acrylamide and acrylic acid-acrylonitrile terpolymer water-reducing agent as main component and inorganic setting accelerator are compound.
Without (low) although alkali accelerator studies development speed quickly, although engineer application proportion also significantly carries China's liquid
Height, but there are still some problems, for example the volume of accelerator is concentrated between 3%~12%, relatively traditional volume 2% or so
It is higher；There are still certain unstable for the adaptability of part accelerator kind and variety classes cement, admixture and additive
Property；It is on the high side.
The content of the invention
The object of the present invention is to provide a kind of alkali-free liquid accelerator and preparation method thereof, the accelerator not alkali metal containing from
Son, non-corrosive and penetrating odor, stable quality, adaptability is good, and volume is low, and rate of set is fast and intensity is high.
To achieve these goals, the technical solution adopted by the present invention is：
The mass fraction of a kind of alkali-free liquid accelerator, component and each component is as follows：30~60 parts of aluminum sulfate, calcium formate 5
~10 parts, 1.0~3.5 parts of methylcellulose, 0.8~1.5 part of polyacrylamide, 0.2~1.0 part of organic acid, triethanolamine
1~3 part, 0.15~1.08 part of antifoaming agent, 0.5~1.5 part of phosphoric acid, 30~50 parts of water.
The organic acid is citric acid or ethanedioic acid.
The antifoaming agent is dimethicone or polypropylene glycol.
The mass concentration of the phosphoric acid is 85%.
The mass fraction of the alkali-free liquid accelerator, component and each component is preferably as follows：40~50 parts of aluminum sulfate, first
Sour 6~8 parts of calcium, 1.5~3.0 parts of methylcellulose, 1.0~1.3 parts of polyacrylamide, 0.4~0.8 part of organic acid, three second
1.5~2.5 parts of hydramine, 0.55~0.88 part of antifoaming agent, 0.8~1.2 part of phosphoric acid, 35~45 parts of water.
The mass fraction of the alkali-free liquid accelerator, component and each component is preferably as follows：45 parts of aluminum sulfate, calcium formate
7 parts, 2.2 parts of methylcellulose, 1.2 parts of polyacrylamide, 0.6 part of organic acid, 2 parts of triethanolamine, 0.64 part of antifoaming agent,
.0 parts of phosphatase 11,40 parts of water.
The preparation method of the alkali-free liquid accelerator, includes the following steps：
1）Aluminum sulfate, calcium formate, organic acid and phosphoric acid are added to the water, heating stirring, heating temperature to 60~80 DEG C,
Speed of agitator is 1200~2000rpm, stirs 10~20min；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid
Accelerator.
Preferred steps 1) in heating temperature to 70 DEG C, speed of agitator 1500rpm, stir 15min.
Advantageous effect：
Alkali-free liquid accelerator provided by the invention is free of alkali metal ion, and non-corrosive and penetrating odor, quality is steady
Fixed, adaptability is good, and volume is low, and rate of set is fast and intensity is high.According to the experiment condition of JC477-2005, speed provided by the invention
Solidifying agent can make cement pre-hardening in 2min in volume 1%~3%, the final set in 5min；And have under the conditions of -10 DEG C~45 DEG C
There is good storage stability.
Specific embodiment
Cement used in experiment is the Tiger Mountain .024.5 cement of Zhejiang Tiger Mountain group production in following embodiment.The quality of phosphoric acid
Concentration is 85%.
Embodiment 1
The mass fraction of a kind of alkali-free liquid accelerator, component and each component is as follows：30~60 parts of aluminum sulfate, calcium formate 5
~10 parts, 1.0~3.5 parts of methylcellulose, 0.8~1.5 part of polyacrylamide, 0.2~1.0 part of citric acid, triethanolamine
1~3 part, 0.15~1.08 part of polypropylene glycol, 0.5~1.5 part of phosphoric acid, 30~50 parts of water.
Preparation method includes the following steps：
1）Aluminum sulfate, calcium formate, organic acid and phosphoric acid are added to the water, heating stirring, heating temperature is to 70 DEG C, stirring
Rotating speed is 1500rpm, stirs 15min；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid
Accelerator.
Embodiment 2
The mass fraction of a kind of alkali-free liquid accelerator, component and each component is as follows：30~60 parts of aluminum sulfate, calcium formate 5
~10 parts, 1.0~3.5 parts of methylcellulose, 0.8~1.5 part of polyacrylamide, 0.2~1.0 part of ethanedioic acid, triethanolamine
1~3 part, 0.15~1.08 part of polypropylene glycol, 0.5~1.5 part of phosphoric acid, 30~50 parts of water.
Preparation method includes the following steps：
1）Aluminum sulfate, calcium formate, organic acid and phosphoric acid are added to the water, heating stirring, heating temperature is to 70 DEG C, stirring
Rotating speed is 1500rpm, stirs 15min；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid
Accelerator.
Embodiment 3
The mass fraction of a kind of alkali-free liquid accelerator, component and each component is as follows：40~50 parts of aluminum sulfate, calcium formate 6
~8 parts, 1.5~3.0 parts of methylcellulose, 1.0~1.3 parts of polyacrylamide, 0.4~0.8 part of ethanedioic acid, triethanolamine
1.5~2.5 parts, 0.55~0.88 part of antifoaming agent dimethicone, 0.8~1.2 part of phosphoric acid, 35~45 parts of water.
Preparation method includes the following steps：
1）Aluminum sulfate, calcium formate, organic acid and phosphoric acid are added to the water, heating stirring, heating temperature is to 70 DEG C, stirring
Rotating speed is 1500rpm, stirs 15min；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid
Accelerator.
Embodiment 4
The mass fraction of a kind of alkali-free liquid accelerator, component and each component is as follows：40~50 parts of aluminum sulfate, calcium formate 6
~8 parts, 1.5~3.0 parts of methylcellulose, 1.0~1.3 parts of polyacrylamide, 0.4~0.8 part of citric acid, triethanolamine
1.5~2.5 parts, 0.55~0.88 part of antifoaming agent dimethicone, 0.8~1.2 part of phosphoric acid, 35~45 parts of water.
Preparation method includes the following steps：
1）Aluminum sulfate, calcium formate, organic acid and phosphoric acid are added to the water, heating stirring, heating temperature is to 70 DEG C, stirring
Rotating speed is 1500rpm, stirs 15min；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid
Accelerator.
Embodiment 5
The mass fraction of a kind of alkali-free liquid accelerator, component and each component is as follows：45 parts of aluminum sulfate, 7 parts of calcium formate,
2.2 parts of methylcellulose, 1.2 parts of polyacrylamide, 0.6 part of citric acid, 2 parts of triethanolamine, antifoaming agent dimethicone
0.64 part .0 parts of phosphatase 11,40 parts of water.
Preparation method includes the following steps：
1）Aluminum sulfate, calcium formate, organic acid and phosphoric acid are added to the water, heating stirring, heating temperature is to 70 DEG C, stirring
Rotating speed is 1500rpm, stirs 15min；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid
Accelerator.
Comparative example 1（Comparative example 1 and the difference of embodiment 5 are only that, calcium formate and Methyl cellulose are not added in comparative example 1
Element, remaining component and its content are the same as embodiment 5）
The mass fraction of a kind of accelerator, component and each component is as follows：45 parts of aluminum sulfate, 1.2 parts of polyacrylamide, lemon
0.6 part of lemon acid, 2 parts of triethanolamine, 0.64 part of antifoaming agent dimethicone .0 parts of phosphatase 11,40 parts of water.
Comparative example 2（Comparative example 2 and the difference of embodiment 5 are only that, polyacrylamide is not added in comparative example 2, remaining group
Divide and its content is the same as embodiment 5）
The mass fraction of a kind of accelerator, component and each component is as follows：45 parts of aluminum sulfate, 7 parts of calcium formate, Methyl cellulose
2.2 parts of element, 0.6 part of citric acid, 2 parts of triethanolamine, 0.64 part of antifoaming agent dimethicone .0 parts of phosphatase 11, water 40
Part.
Comparative example 3（Comparative example 3 and the difference of embodiment 5 are only that, citric acid and phosphoric acid are not added in comparative example 3, remaining
Component and its content are the same as embodiment 5）
The mass fraction of a kind of accelerator, component and each component is as follows：45 parts of aluminum sulfate, 7 parts of calcium formate, Methyl cellulose
2.2 parts of element, 1.2 parts of polyacrylamide, 2 parts of triethanolamine, 0.64 part of antifoaming agent dimethicone, 40 parts of water.
By the accelerator of Examples 1 to 5 and comparative example 1~3 by 2% volume and cement mixing, setting time and 1 day are investigated
Intensity and 28 days intensity, the results are shown in Table 1.
Table 1：
| Group | Presetting period | Final setting time | 1 day intensity/MPa | 28 days intensity/MPa |
| Blank | 175min | 220min | -- | 53.89 |
| Embodiment 1 | 3min10s | 5min40s | 18.9 | 45.87 |
| Embodiment 2 | 2min52s | 5min26s | 20.1 | 46.98 |
| Embodiment 3 | 2min44s | 4min15s | 23.8 | 48.90 |
| Embodiment 4 | 2min17s | 4min3s | 6.42 | 47.68 |
| Embodiment 5 | 1min15s | 3min8s | 25.3 | 53.34 |
| Comparative example 1 | 8min19s | 16min26s | 10.57 | 33.28 |
| Comparative example 2 | 7min48s | 15min40s | 13.26 | 34.75 |
| Comparative example 3 | 8min40s | 17min9s | 12.81 | 32.61 |
By the accelerator of embodiment 5 by different addition quantity and cement mixing, investigation setting time is shown in Table 2.
Table 2：
| Group | 0.5% | 1% | 1.5% | 2% | 2.5% | 3% |
| Presetting period | 3min50s | 2min10s | 1min46s | 1min15s | 1min5s | 1min0s |
| Final setting time | 8min10s | 5min55s | 5min15s | 3min8s | 3min0s | 2min45s |
Claims (1)
1. a kind of alkali-free liquid accelerator, which is characterized in that the mass fraction of component and each component is as follows：
45 parts of aluminum sulfate, 7 parts of calcium formate, 2.2 parts of methylcellulose, 1.2 parts of polyacrylamide, 0.6 part of citric acid, triethanolamine
2 parts, 0.64 part of antifoaming agent dimethicone .0 parts of phosphatase 11,40 parts of water；
The alkali-free liquid accelerator preparation method, includes the following steps：
1）Aluminum sulfate, calcium formate, citric acid and phosphoric acid are added to the water, heating stirring, heating temperature is to 70 DEG C, speed of agitator
For 1500rpm, 15min is stirred；
2）By step 1）Obtained mixed solution is cooled to room temperature, and is added in remaining ingredient, is stirred evenly, obtain alkali-free liquid rapid hardening
Agent.
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| CN201510637362.6A CN105271911B (en) | 2015-10-06 | 2015-10-06 | A kind of alkali-free liquid accelerator and preparation method thereof |
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| CN201510637362.6A CN105271911B (en) | 2015-10-06 | 2015-10-06 | A kind of alkali-free liquid accelerator and preparation method thereof |
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| CN105271911B true CN105271911B (en) | 2018-06-05 |
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| CN106477960A (en) * | 2016-10-18 | 2017-03-08 | 四川巨星新型材料有限公司 | A kind of high-performance liquid accelerator composition and preparation method thereof |
| TR201802474A2 (en) * | 2018-02-21 | 2018-03-21 | Ak Kim Kimya Sanayi Ve Ticaret Anonim Sirketi | ALKALI-FREE SPRAYING CONCRETE ADDITIVE AND PRODUCTION |
| CN112777960A (en) * | 2019-11-08 | 2021-05-11 | 北京市建筑工程研究院有限责任公司 | High-durability liquid alkali-free accelerator and preparation method thereof |
| CN114890709B (en) * | 2022-06-20 | 2022-11-08 | 淄博汇捷化工股份有限公司 | Environment-friendly non-toxic alkali-free liquid concrete accelerator and preparation method thereof |
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| 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 |
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Inventor after: Xu Dongdi Inventor before: Li Kang |
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Effective date of registration: 20180504 Address after: 512000 Guangdong province Shaoguan city Qujiang District white soil Town under inspection Village Ridge Applicant after: Shaoguan Qujiang Feng Ze Concrete Co.,Ltd. Address before: 610000 19 Wenjiang 1702, Lixing East Road, Wenjiang District, Chengdu, Sichuan Applicant before: Li Kang |
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Denomination of invention: An alkali free liquid accelerator and its preparation method Effective date of registration: 20210628 Granted publication date: 20180605 Pledgee: Guangdong Ruyuan Rural Commercial Bank Co.,Ltd. Pledgor: Shaoguan Qujiang Feng Ze Concrete Co.,Ltd. Registration number: Y2021980005374 |
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Granted publication date: 20180605 Termination date: 20211006 |