CN108585587A - A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator and preparation method thereof - Google Patents
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator and preparation method thereof Download PDFInfo
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- CN108585587A CN108585587A CN201810229892.0A CN201810229892A CN108585587A CN 108585587 A CN108585587 A CN 108585587A CN 201810229892 A CN201810229892 A CN 201810229892A CN 108585587 A CN108585587 A CN 108585587A
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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
- C04B40/0046—Premixtures of ingredients characterised by their processing, e.g. sequence of mixing the ingredients when preparing the premixtures
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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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of room temperature to synthesize early-strength alkali-free liquid setting accelerator and preparation method thereof, it is made of the component of following mass percentage：Modified poly aluminum sulfate solution 60~80%, graphene oxide 1~3%, stabilizer 1~5%, properties modifier 1~5%, surplus are water.Final strength is not influenced while so that early strength of concrete is rapidly developed in room temperature synthesis early-strength alkali-free liquid setting accelerator addition concrete provided by the present invention, the possibility for generating alkali-aggregate reaction can also be substantially reduced.And the requirement of construction of shotcrete is satisfied by the portland cement of different brands；Also have many advantages, such as that low-temperature resistance, high rapid hardening, low-dosage, the long-term storing performance stabilization of nothing (low) burn into, reasonable price, high comprehensive performance are with good economic efficiency.
Description
Technical field
The invention belongs to cement concrete additive technology fields, and in particular to a kind of room temperature synthesis early-strength alkali-free liquid
Accelerator and preparation method thereof.
Background technology
Accelerator is the additive for making concrete quick-hardening condense, and is mainly used for the construction of gunite concrete.Traditional speed
Solidifying agent generally there is strong basicity also to bring many problems simultaneously although can meet the requirement of gunite concrete：Spray is mixed
Solidifying soil later strength retention is low, damages the health of construction personnel, also increases the probability that alkali-aggregate reaction occurs for concrete, leads
Late strength of concrete and durability is caused to decline.
To overcome drawbacks described above, alkali-free liquid accelerating agent to become the Main way of accelerator development in the world, China is in speed
Than later, the research of especially alkali-free liquid accelerating agent is also immature for starting in terms of solidifying agent research.Alkali is contained according to international standard
Accelerator of the amount less than 1% is known as alkali-free quick-coagulant.From the point of view of presently disclosed patent, though the entitled alkali-free rapid hardening of partial monopoly
Agent, but the alkali introduced in its formula is often beyond 1%.Shanxi Hua Kai great achievement Science and Technology Ltd. publication (number of patent application：
201710101577.5) entitled alkali-free quick-coagulant, and alkali content reaches as high as 13.3% in being actually formulated.Hundred million science and technology of Tangshan City dragon
Development corporation, Ltd.'s (number of patent application：201610708544.2) entitled alkali-free quick-coagulant, and alkali content highest in being actually formulated
Up to 2.95%.Jiangsu Arit New Materials Co., Ltd.'s publication (number of patent application：201410742161.8) in invent
Its setting time of accelerator, also there is ample room for improvement, and later strength loss is larger.Xuzhou Kowloon synthetic material factory discloses specially
Sharp (number of patent application：201310700044.0) its accelerator later strength loses fluorine that is larger, and being used in its accelerator
Magnesium silicate is toxic, is unfavorable for large-scale promotion use.Therefore, low-temperature resistance, high rapid hardening, low-dosage, nothing (low) burn into height are developed
Intensity, high comprehensive performance, reasonable price alkali-free liquid accelerating agent have very great meaning.
Invention content
The technical problem to be solved by the present invention is to aiming at the above shortcomings existing in the prior art, provide a kind of room temperature conjunction
At early-strength alkali-free liquid setting accelerator and preparation method thereof.
In order to solve the above technical problems, technical solution provided by the invention is：
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is provided, it is made of the component of following mass percentage：
Modified poly aluminum sulfate solution 60~80%, graphene oxide 1~3%, stabilizer 1~5%, properties modifier 1~5% are remaining
Amount is water；
The modified poly aluminum sulfate solution component and mass percent are：Polyaluminium sulfate 45~60%, diethanol amine 5
~15%, water 30~45%；Preparation method is：1h is mixed in polyaluminium sulfate, diethanol amine and water at normal temperatures to obtain
It arrives.
By said program, the polyaluminium sulfate is industrial polymerisation aluminum sulfate, wherein Al2O3Content is more than 17%.Polymerised sulphur
Sour aluminium is the main rapid hardening component in the accelerator, and performance is by Al2O3The influence of content, Al2O3The too low then rapid hardening effect of content
Difference.
By said program, the graphene oxide is 5 layers of layered graphite oxide alkene below.Graphene oxide is for improving
The intensity of gunite concrete.
By said program, the stabilizer is one or more in ethylenediamine tetra-acetic acid, citric acid, salicylic acid, phosphoric acid.
Stabilizer is used to extend the shelf life of the present invention, keeps dispersion liquid storage for a long time without obvious sediment.
By said program, the properties modifier is that polyacrylamide (anionic, number-average molecular weight 300W) and silicon are molten
Glue in mass ratio 1：2 are mixed obtained stable transparent solution.Properties modifier promotes as the cosolvent of polyaluminium sulfate
The dispersion liquid that System forming is stablized, and the rebound degree of gunite concrete can be reduced.
By said program, the Ludox is commercial acid Ludox, mass fraction 30~40%.Since its is larger
Specific surface area, the good dispersion in cement can improve the intensity of cement and reduce the porosity of cement.
The invention also includes the preparation methods that above-mentioned room temperature synthesizes early-strength alkali-free liquid setting accelerator, are as follows：
1) graphene oxide and water are added in modified poly aluminum sulfate solution and ultrasonic disperse uniformly obtains stable transparent
Solution；
2) properties modifier is added in stable transparent solution obtained by step 1), stabilizer is added after stirring 1h at normal temperatures
And it is uniformly mixing to obtain room temperature synthesis early-strength alkali-free liquid setting accelerator.
The application method of above-mentioned room temperature synthesis early-strength alkali-free liquid setting accelerator is：It is mixed being sprayed using concrete sprayer
During solidifying soil, room temperature synthesis early-strength alkali-free liquid setting accelerator is added in concrete at concrete ejection machine nozzle and is prepared
Gunite concrete.
Preferably, the room temperature synthesis early-strength alkali-free liquid setting accelerator volume is 5~7% (on the basis of cement
Weight).
It is stable that the present invention uses diethanol amine modified poly aluminum sulfate that polyaluminium sulfate and diethanol amine is made to be formed first
Complex compound prevents Al in polyaluminium sulfate3+Hydrolysis, add graphene oxide to improve the early epistasis energy of alkali-free quick-coagulant,
Stabilizer is adjusted pH value in solution and further suppresses Al in accelerator3+Hydrolysis, gather in the properties modifier being eventually adding
Acrylamide makes modified poly sulfuric acid aluminium complex be not easy to sink since its huge molecular weight forms network structure in the solution
Drop.
The beneficial effects of the present invention are：1, room temperature synthesis early-strength alkali-free liquid setting accelerator provided by the present invention is added
Final strength is not influenced while so that early strength of concrete is rapidly developed in concrete, can also substantially reduce generation alkali-bone
Expect the possibility of reaction.And the adaptability of room temperature synthesis early-strength alkali-free liquid setting accelerator provided by the invention and cement is very
It is good, the requirement of construction of shotcrete is satisfied by the portland cement of different brands, and use traditional strong basicity accelerator
Late strength of concrete can be caused to decline apparent, and the higher fall of dosage is bigger；2, room temperature synthesis provided by the invention is early
Strong type alkali-free liquid setting accelerator also has low-temperature resistance, high rapid hardening, low-dosage, the long-term storing performance stabilization of nothing (low) burn into, price
The advantages that reasonable, high comprehensive performance are with good economic efficiency；3, the present invention synthesizes under normal temperature condition, and low energy consumption, behaviour
Make easy.
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, the present invention is made with reference to embodiment
It is described in further detail.
Properties modifier used in the embodiment of the present invention is that polyacrylamide (anionic, number-average molecular weight 300W) and silicon are molten
Glue (commercial acid Ludox, mass fraction 30%) in mass ratio 1：2 are mixed obtained stable transparent solution.
Embodiment 1
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, by 30 parts of water and 10 parts of diethanol amine (purity>99%) 60 parts of polyaluminium sulfate (Al are added2O3Content 19%)
In, it is stirred at normal temperatures to polyaluminium sulfate and dissolves to form stable transparent solution, is i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 60%, (5 layers below for graphene oxide
Layered graphite oxide alkene) 3%, stabilizer (citric acid) 1%, properties modifier 5%, water 31%；
C, 3 parts of graphene oxides and 31 parts of water are added in 60 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 5 parts of properties modifiers are added in above-mentioned gained stable transparent solution, stirring 1h at normal temperatures ensures it fully
1 part of citric acid and stirring at normal temperature 30min is added in complexing, obtains room temperature synthesis early-strength alkali-free liquid setting accelerator.
Embodiment 2
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, 55 parts of polyaluminium sulfate (Al are added in 30 parts of water and 15 parts of diethanol amine2O3Content 18%) in, it stirs at normal temperatures
It mixes to polyaluminium sulfate and dissolves to form stable transparent solution, is i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 65%, graphene oxide 2%, stabilizer
(ethylenediamine tetra-acetic acid) 1%, properties modifier 4%, water 28%；
C, 2 parts of graphene oxides and 28 parts of water are added in 65 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 4 parts of properties modifiers are added in above-mentioned gained stable transparent solution, stirring 1h at normal temperatures ensures it fully
Complexing is added 1 part of ethylenediamine tetra-acetic acid and stirring at normal temperature 30min, obtains stable alkali-free liquid setting accelerator.
Embodiment 3
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, 50 parts of polyaluminium sulfate (Al are added in 40 parts of water and 10 parts of diethanol amine2O3Content 19%) in stir at normal temperatures
It mixes to polyaluminium sulfate and dissolves to form stable transparent solution, is i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 70%, graphene oxide 1%, stabilizer
(citric acid) 2%, properties modifier 3%, water 24%；
C, 1 part of graphene oxide and 24 parts of water are added in 70 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 3 parts of properties modifiers are added in above-mentioned gained stable transparent solution, stirring 1h at normal temperatures ensures it fully
Complexing is added 2 parts of citric acids and stirring at normal temperature 30min, obtains stable alkali-free liquid setting accelerator.
Embodiment 4
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, 45 parts of polyaluminium sulfate (Al are added in 45 parts of water and 10 parts of diethanol amine2O3Content 19%) in stir at normal temperatures
It mixes to polyaluminium sulfate and dissolves to form stable transparent solution, is i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 72%, graphene oxide 3%, stabilizer
(citric acid) 3%, properties modifier 2%, water 20%；
C, 3 parts of graphene oxides and 20 parts of water are added in 72 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 2 parts of properties modifiers and 20 parts of water 70 parts of modified poly aluminum sulfate solutions of addition are stirred 1h and ensured at normal temperatures
It is fully complexed, and 3 parts of citric acids and stirring at normal temperature 30min is added, obtains stable alkali-free liquid setting accelerator.
Embodiment 5
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, 50 parts of polyaluminium sulfate (Al are added in 40 parts of water and 10 parts of diethanol amine2O3Content 18%) in stir at normal temperatures
It mixes to polyaluminium sulfate and dissolves to form stable transparent solution, is i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 75%, graphene oxide 1%, stabilizer
(citric acid) 4%, properties modifier 1%, water 19%；
C, 1 part of graphene oxide and 19 parts of water are added in 75 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 1 part of properties modifier is added in above-mentioned gained stable transparent solution, stirring 1h at normal temperatures ensures it fully
Complexing is added 4 parts of citric acids and stirring at normal temperature 30min, obtains stable alkali-free liquid setting accelerator.
Embodiment 6
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, 55 parts of polyaluminium sulfate (Al are added in 40 parts of water and 5 parts of diethanol amine2O3Content 18%) in stir at normal temperatures
It dissolves to form stable transparent solution to polyaluminium sulfate, i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 80%, graphene oxide 2%, stabilizer
(citric acid) 5%, properties modifier 1%, water 12%；
C, 2 parts of graphene oxides and 13 parts of water are added in 80 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 1 part of properties modifier is added in above-mentioned gained stable transparent solution, stirring 1h at normal temperatures ensures it fully
Complexing is added 5 parts of citric acids and stirring at normal temperature 30min, obtains stable alkali-free liquid setting accelerator.
Embodiment 7
A kind of room temperature synthesis early-strength alkali-free liquid setting accelerator is prepared, is as follows：
A, 55 parts of polyaluminium sulfate (Al are added in 40 parts of water and 5 parts of diethanol amine2O3Content 18%) in stir at normal temperatures
It dissolves to form stable transparent solution to polyaluminium sulfate, i.e. modified poly aluminum sulfate solution；
B, each raw material is weighed by following each component：Modified poly aluminum sulfate solution 80%, graphene oxide 1%, stabilizer
(citric acid) 1%, properties modifier 1%, water 17%；
C, 1 part of graphene oxide and 17 parts of water are added in 80 parts of modified poly aluminum sulfate solutions and carry out ultrasonic disperse
20min obtains stable transparent solution；
D, 1 part of properties modifier is added in above-mentioned gained stable transparent solution, stirring 1h at normal temperatures ensures it fully
Complexing is added 1 part of citric acid and stirring at normal temperature 30min, obtains stable alkali-free liquid setting accelerator.
Embodiment 1-7 formula comparisons are shown in Table 1.
Table 1
Embodiment 8
Room temperature synthesis early-strength alkali-free liquid setting accelerator prepared by embodiment 1-7 is more than six in room temperature storage stationary phase
Month, it tests it and mixes performance after cement, test result is shown in Table 2.
Table 2
The measurement of setting time：According to (JT/T 1088-2016)《Highway engineering gunite concrete alkali-free quick-coagulant》In
Regulation：It chooses the net divergence of 0.35 water-cement ratio, cement and reaches water-reducing agent volume under the conditions of (280 ± 10) mm as detection nothing
The water-reducing agent volume of alkali accelerator.Cement paste setting time tests the ratio of mud 0.35, wherein cement 400g, and water consumption deducts liquid
Water in body accelerator.Load weighted water, cement, water-reducing agent are put into agitated kettle, startup blender mixes slowly 30s and stops
Only.It is once rapidly added load weighted liquid accelerator (weight of the volume on the basis of cement) with syringe, mixes slowly 5s,
Quick stirring 15s again, stirring terminates, and is fitted into immediately in circle section mould, is plugged and pounded, gently vibrated for several times with pocket knife, scrapes off extra net
Slurry, smooth out surface.It is counted from liquid accelerator is added, 50s is not to be exceeded in all operationss time.The measurement of setting time is using mixed
Solidifying soil net slurry normal consistency and coagulation time tester, setting time from being added liquid accelerator, every 10S in test process
It measures once, until initial set and final set.When presetting period is subject in test point insertion slurry apart from bottom plate 4mm ± 1mm, eventually
When the solidifying time is subject in test point insertion slurry less than 0.5mm.
The measurement of compression strength：According to (JT/T 1088-2016)《Highway engineering gunite concrete alkali-free quick-coagulant》In
Regulation, mortar strength test in match ratio water：Cement：The mass ratio of normal sand is 1：2：4, water consumption deducts water-reducing agent and nothing
Institute in alkali accelerator is aqueous.Load weighted water, cement are sequentially placed into agitated kettle, blender is started immediately and mixes slowly
Then 30s equably normal sand is added during second 30s is mixed slowly, then high-speed stirred 30s.Stop mixing 90s,
The mortar on blade and pot wall is scraped in agitated kettle with rubber scraping in first 15s in stopping mixing.It is further continued for high-speed stirring
Mix 30s.The liquid accelerator for recommending volume is added with syringe immediately after, mixes slowly 5s, then quickly stirring 15s, stirring
Terminate.The good mortar of mixing is fitted into cement mortar test mould as early as possible.Enter whole behaviour of mould from addition liquid accelerator to mortar
50s is not to be exceeded as the time, puts it into the maintenance of standard environment curing box, demoulds afterwards for 24 hours, and measure its 1d, 28d, 90d resistance to compression
Intensity.
Test cement used is the new P.O42.5 Portland cements of China, using embodiment 4, embodiment 5,6 and of embodiment
Accelerator prepared by embodiment 7, cement paste setting time and strength of cement mortar can reach (JT/T when volume 5%
1088-2016)《Highway engineering gunite concrete alkali-free quick-coagulant》The requirement of middle Grade A.
Embodiment 9
Adaptation of the room temperature synthesis early-strength alkali-free liquid setting accelerator sample to cement brand prepared by testing example 1-7
Property, test result is shown in Table 3.
Table 3
As shown in Table 3, conch board, good magnificent board, China Resources board, red lion board P.O42.5 Portland cements is respectively adopted, and
Accelerator prepared by addition embodiment 6 cement paste setting time and strength of cement mortar in volume 6% can reach (JT/T
1088-2016)《Highway engineering gunite concrete alkali-free quick-coagulant》The requirement of middle Grade A.
Sample provided by the invention need to do the materials such as Portland cement used in construction and other additives before
Compatibility test, while considering the influence of construction temperature, the ratio of mud, cement freshness, the optimum mix amount is determined with this.Pay attention to construction
In should strictly control the ratio of mud, if the ratio of mud is excessive, setting time can be extended, influence using effect.
Room temperature synthesizing liquid alkali-free quick-coagulant appearance provided by the invention be light yellow uniform liquid, have alkali-free, without chlorine,
Have no irritating odor, volume is low, condensation is fast, does not corrode human body, does not corrode to reinforcing bar, have good adaptability to various cement,
The shortcomings of traditional alkaline strong workability of accelerator corrosivity is poor, setting time is slow, and later strength loss is big is overcome, and raw
Production. art is simple, and raw material cost is low, suitable for mass production.It is widely portable to mine engineering, well lane engineering, traffic tunnel
The construction of shotcrete of the engineerings such as engineering, urban construction, water conservancy and leak stopping, ground cement rapid concrete construction and concrete are urgent
It speedily carries out rescue work, repair the engineerings such as reinforcing.
Claims (9)
1. a kind of room temperature synthesizes early-strength alkali-free liquid setting accelerator, which is characterized in that it by following mass percentage component
Composition：Modified poly aluminum sulfate solution 60~80%, graphene oxide 1~3%, stabilizer 1~5%, properties modifier 1~
5%, surplus is water；
The modified poly aluminum sulfate solution component and mass percent are：Polyaluminium sulfate 45~60%, diethanol amine 5~
15%, water 30~45%；Preparation method is：1h is mixed in polyaluminium sulfate, diethanol amine and water at normal temperatures to obtain.
2. room temperature according to claim 1 synthesizes early-strength alkali-free liquid setting accelerator, which is characterized in that the polyaluminum sulfate
Aluminium is industrial polymerisation aluminum sulfate, wherein Al2O3Content is more than 17%.
3. room temperature according to claim 1 synthesizes early-strength alkali-free liquid setting accelerator, which is characterized in that the graphite oxide
Alkene is 5 layers of layered graphite oxide alkene below.
4. room temperature according to claim 1 synthesizes early-strength alkali-free liquid setting accelerator, which is characterized in that the stabilizer is
It is one or more in ethylenediamine tetra-acetic acid, citric acid, salicylic acid, phosphoric acid.
5. room temperature according to claim 1 synthesizes early-strength alkali-free liquid setting accelerator, which is characterized in that the property regulation
Agent is polyacrylamide and Ludox in mass ratio 1：2 are mixed obtained stable transparent solution.
6. room temperature according to claim 1 synthesizes early-strength alkali-free liquid setting accelerator, which is characterized in that the Ludox
For commercial acid Ludox, mass fraction 30~40%.
7. a kind of preparation method of any room temperature synthesis early-strength alkali-free liquid setting accelerators of claim 1-6, feature
It is, is as follows：
1) graphene oxide and water are added in modified poly aluminum sulfate solution and ultrasonic disperse uniformly obtains stable transparent solution；
2) properties modifier is added in stable transparent solution obtained by step 1), stabilizer is added after stirring 1h at normal temperatures and stirred
It mixes and uniformly obtains room temperature synthesis early-strength alkali-free liquid setting accelerator.
8. a kind of application method of any room temperature synthesis early-strength alkali-free liquid setting accelerators of claim 1-6, feature
It is, is as follows：It, will be normal at concrete ejection machine nozzle during using concrete sprayer gunite concrete
Temperature synthesis early-strength alkali-free liquid setting accelerator, which is added in concrete, prepares gunite concrete.
9. application method according to claim 8, which is characterized in that the room temperature synthesizes early-strength alkali-free liquid setting accelerator
Volume is 5~7%.
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| CN110104987A (en) * | 2019-06-21 | 2019-08-09 | 广州市建筑科学研究院有限公司 | A kind of high early-strength alkali-free liquid accelerator and its preparation method and application |
| CN110510906A (en) * | 2019-09-30 | 2019-11-29 | 山东中岩建材科技有限公司 | A kind of alkali-free liquid accelerator and preparation method thereof |
| CN113200704A (en) * | 2021-05-19 | 2021-08-03 | 湖南加美乐素新材料股份有限公司 | Environment-friendly stable alkali-free liquid accelerator and preparation method and application thereof |
| CN113845327A (en) * | 2021-10-27 | 2021-12-28 | 中国科学院过程工程研究所 | Graphene alkali-free liquid accelerator and preparation method and application thereof |
| CN115286279A (en) * | 2022-08-10 | 2022-11-04 | 庐江县新创新型材料有限公司 | Environment-friendly concrete liquid accelerator and preparation method and application thereof |
| CN115368051A (en) * | 2022-10-25 | 2022-11-22 | 石家庄市长安育才建材有限公司 | Antifreeze accelerator, preparation method thereof and sprayed concrete |
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| CN113845327A (en) * | 2021-10-27 | 2021-12-28 | 中国科学院过程工程研究所 | Graphene alkali-free liquid accelerator and preparation method and application thereof |
| CN115286279A (en) * | 2022-08-10 | 2022-11-04 | 庐江县新创新型材料有限公司 | Environment-friendly concrete liquid accelerator and preparation method and application thereof |
| CN115286279B (en) * | 2022-08-10 | 2023-08-25 | 庐江县新创新型材料有限公司 | Environment-friendly concrete liquid accelerator and preparation method and application thereof |
| CN115368051A (en) * | 2022-10-25 | 2022-11-22 | 石家庄市长安育才建材有限公司 | Antifreeze accelerator, preparation method thereof and sprayed concrete |
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