CN106477960A - A kind of high-performance liquid accelerator composition and preparation method thereof - Google Patents
A kind of high-performance liquid accelerator composition and preparation method thereof Download PDFInfo
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- CN106477960A CN106477960A CN201610904784.XA CN201610904784A CN106477960A CN 106477960 A CN106477960 A CN 106477960A CN 201610904784 A CN201610904784 A CN 201610904784A CN 106477960 A CN106477960 A CN 106477960A
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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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of high-performance liquid accelerator composition and preparation method thereof.The present invention is made up of the raw material of following weight percents：40～60% inorganic salts, 10～30% rheological agent, 5～10% polyalcohol, 1～5% inorganic acid, 1～5% flocculant, 0.5～1% defoamer, balance of water；Wherein, the percentage by weight sum of above-mentioned each raw material is 100%.The high-performance liquid accelerator of the present invention has the advantages that volume is low, alkali-free, nothing chlorine, storage stability is good, nodeless mesh precipitation, viscosity are low, the later stage nothing loss of strength, overcome the easy layering and precipitating of existing liquid accelerator, viscosity big and the shortcomings of corrosivity is strong.
Description
Technical field
The present invention relates to a kind of high-performance liquid accelerator composition and preparation method thereof.
Background technology
Concrete-spraying technology grows up according to shotcrete principle, compared with normal concrete, spray
Penetrate concrete and have the advantages that rate of set is fast and early strength is high, operating type is flexible, it is adaptable to the Special Ring such as down-hole, tunnel
Construction operation under border.Accelerator application technology plays vital effect in gunite concrete implementation process, is that injection is mixed
Indispensable additive in solidifying soil application engineering method, the quality of its performance directly influence jet quality and the use of gunite concrete
Performance.Accelerator can not only accelerate hydrated cementitious hardening, form enough intensity in a short period of time, and can increase
Jetting thickness of gunite concrete, shortens the time interval between spraying twice, so as to ensure the requirement of special construction.
The thirties in 20th century, foreign countries begin to research and apply accelerator in engineering construction, and put into engineering earliest is
With the liquid with no taste that sodium metasilicate is main former material.Later, external and occur in that in succession multiple with alkali-metal aluminate, carbonate
For the accelerator of main component, these accelerators are referred to as conventional alkaline accelerator, and the skin in work progress to human body has corruption
Erosion injury effect, promotees to coagulate effect typically, and majority contains alkali, chlorine composition, affects the performances such as the durability of concrete.This kind of product
Though product can meet in construction to coagulate the rush of concrete requiring, the late strength of concrete for filling such accelerator loses very
Seriously, main cause is that conventional alkaline accelerator alkali content is high, so that cement is formed at the aquation initial stage after filling gunite concrete
Loose aluminate hyrate structure, causes concrete that alkali-aggregate reaction easily occurs, to the performance of its later strength very not
Profit.Recent two decades come, and begin to use calcium salt and aluminium salt to develop simultaneously to replace the alkali metal salts such as silicate and carbonate both at home and abroad
Production alkali-free（Low alkali）Accelerator, fills alkali-free（Low alkali）After accelerator, spray while rapid hardening effect is significant, can be also significantly improved
Penetrate the early strength of concrete and reduce its later stage loss of strength, and can improve the shear strength of concrete and impermeability and
The cohesive force of concrete and rebar.But this kind of accelerator yield is big, easy layering and precipitating, and the adaptability to variety classes cement
Problem, slurry workability very poor.
How incorporation engineering actual conditions, suit measures to local conditions, reasonable material, accelerator are modified, optimize injection coagulation
The composition design of soil is the key factor for ensureing gunite concrete quality, is the important topic of current urgent need to resolve.
Content of the invention
The present invention is directed to the present situation that current rebound of shotcrete is big, endurance quality is poor, by chemical modification, using organic
The technological means of inorganic compounding, provides a kind of alkali-free, nothing chlorine, nontoxic, tasteless and nonirritant, has rapid hardening, low corrosion, high intensity concurrently
High-performance liquid accelerator and preparation method thereof.
The present invention is achieved through the following technical solutions：
A kind of high-performance liquid accelerator composition, the composition are made up of the raw material of following weight percents：40～60%
Inorganic salts, 10～30% rheological agent, 5～10% polyalcohol, 1～5% inorganic acid, 1～5% flocculant, 0.5～1% disappear
Infusion, balance of water；Wherein, the percentage by weight sum of above-mentioned each raw material is 100%.
Specifically, the composition includes following seven kinds of schemes：
Scheme one：Inorganic salts 50%, rheological agent 20%, polyalcohol 8%, inorganic acid 3%, flocculant 5%, defoamer 1%, water 13%；
Scheme two：Inorganic salts 43%, rheological agent 22%, polyalcohol 6%, inorganic acid 2%, flocculant 2%, defoamer 0.5%, water 24.5%；
Scheme three：Inorganic salts 41%, rheological agent 30%, polyalcohol 5%, inorganic acid 5%, flocculant 3%, defoamer 0.8%, water 15.2%；
Scheme four：Inorganic salts 47%, rheological agent 25%, polyalcohol 10%, inorganic acid 4%, flocculant 1%, defoamer 1%, water 12%；
Scheme five：Inorganic salts 53%, rheological agent 27%, polyalcohol 7%, inorganic acid 1%, flocculant 4%, defoamer 0.7%, water 7.3%；
Scheme six：Inorganic salts 55%, rheological agent 18%, polyalcohol 9%, inorganic acid 3%, flocculant 2%, defoamer 0.9%, water 12.1%；
Scheme seven：Inorganic salts 58%, rheological agent 14%, polyalcohol 8%, inorganic acid 2%, flocculant 5%, defoamer 0.5%, water 12.5%.
Specifically, the inorganic salts are selected from aluminum sulfate, aluminum nitrate, calcium sulfate, calcium nitrate, ferric sulfate, ferric nitrate, sodium fluoride
In one or more.Anion in affiliated inorganic salts and the calcium ion reaction of generation in cement hydration process, make C3S surface
It is difficult to double electrical layerses are formed, so that the induction period of C3S shortens even disappearing, and then shortens the setting time of cement, improving
The early strength of cement mortar, plays a part of to shorten rapidly cement initial set, final set.
Specifically, the rheological agent selected from hydroxycarboxylic acid, naphthalene sulfonic acid-formaldehyde condensation product, sulfonated melamine compound resin,
Aromatic amino sulphonic acid salt polymer, aliphatic hydroxyl sulphonate polymer, calcium lignosulfonate, sodium lignin sulfonate, wooden
One or more in plain sulfonic acid magnesium, hydroxy polyethers.The Main Function of rheological agent is to promote inorganic ions with organic group or official
The coordination that can be rolled into a ball is combined, so as to increase the stability of inorganic ions.
Specifically, the one kind or many of the polyalcohol in ethylene glycol, propane diols, glycerine, isopropanol, pentaerythrite
Kind.The Main Function of polyalcohol is to promote to be formed stable dispersion liquid as the cosolvent of inorganic salts, improve dissolution of raw material and
Product stability.
Specifically, the inorganic acid selects one or more in phosphoric acid, hydrofluoric acid, sulfuric acid, permanganic acid, peroxy acid, boric acid.
The Main Function of inorganic acid is which is guaranteed the quality to reach prolongation in order to adjust accelerator pH value for acidity, prevent accelerator layering or crystallization
The purpose of phase.
Specifically, the flocculant is selected from PAMA, non-ionic polyacrylamide, amphion polypropylene
One or more in acid amides, super high molecular weight polyacrylamide.There is good compatibility to electrolyte after flocculant hydrolysis, can
With well absorption in cement slurry particle surface, so as to produce bridging benefit, thickening accelerator, improves gunite concrete with this
Viscosity so as to suppress gunite concrete resilience, increase jet thickness of gunite concrete, reach saving material, improve warp
The purpose of Ji benefit.
Specifically, the defoamer is selected from silicone emulsion, the fatty acid ester compounded thing of higher alcohols, polyoxyethylene polyoxypropylene season
Penta 4 alcohol ethers, polyoxyethylene polyoxy propyl alcohol amidogen ether, polypropylene glycerol aether, polyoxyethylene polyoxypropylene glycerin ether, poly dimethyl
One or more in siloxanes.The purpose of defoamer is to reduce surface tension, eliminates the harmful gas in accelerator process
Bubble.
A kind of preparation method of high-performance liquid accelerator composition, comprises the following steps：Water is added in mixing kettle, so
Add inorganic salts afterwards, fully stirring 2～4 hours is dissolved under conditions of 95～105 DEG C, be subsequently adding polyalcohol, flocculant, disappear
Infusion, is stirred for 1～1.5 hour, adds inorganic acid and stir, be cooled to normal temperature, obtain final product liquid flocculant.
The present invention can be used for the cavern of mine working, traffic tunnel, Hydraulic Tunnel, underground railway and all kinds of purposes（Underground
Power station, warehouse etc.）Gunite concrete support lining engineering；Can also be used for side slope, foundation ditch, reservoir, embankment channel, pond etc.
The rock of engineering, dado engineering；The reinforcement and repair engineering of bridge, sea wall, dam, harbour and building construction is can be additionally used in, and
The protection works such as the anti-corrosion and waterproof of each class formation, leak sealing.Practical application methods are as follows：High-performance liquid accelerator is mixed mixed
Solidifying soil is configured to gunite concrete or mortar, uniformly sprays.It is exemplified below：
Using method of the present invention in gunite concrete, mortar：1. using front, according to technical requirements, should be in engineering experiment room
The high-performance liquid accelerator of the checking present invention and cement, the applicability of aggregate, determine the optimum mix amount value；2. during engineer applied,
The material is added in the accelerator feed bin of spraying machine；3. the accelerator volume for being determined according to laboratory, adjusts spraying machine
Associated control parameters, accelerator is mixed in gunite concrete；When 4. spraying, injection machine gun keeps certain angle with basal plane.
The present invention has advantages below and beneficial effect：
（1）The high-performance liquid accelerator of the present invention has that volume is low, alkali-free, nothing chlorine, storage stability be good, nodeless mesh precipitation,
Viscosity is low, the later stage, the easy layering and precipitating of existing liquid accelerator, viscosity were big and corrosivity is strong nothing, the advantages of loss of strength, overcoming
The shortcomings of.
（2）The present invention is pollution-free in process of production, overcomes powder accelerator and has alkali accelerator to direct labor's
Health cost.
（3）The rebound of shotcrete rate prepared with the liquid accelerator of the present invention is little, gunite concrete is impervious durable
Property preferably, save the consumption of raw material, strengthen impermeability and the durability of gunite concrete.
（4）When gunite concrete is prepared using the liquid accelerator of the present invention, can mix up to 30% admixture, no
But reduce the cost of gunite concrete, the consumption of cement is also reduced, indirectly improves environmental pollution.
（5）When preparing gunite concrete using the alkali-free liquid accelerator of the present invention, volume scope is 0.5-3%, and technical ability reaches
To expected technical indicator, far below the volume of existing all kinds of accelerator 6-10%.
（6）The present invention compared with existing accelerator and conventional powdered accelerator, with obvious technology and economic advantages.
Specific embodiment
With reference to embodiment, the present invention is further illustrated, but embodiments of the present invention are not limited to this.
Embodiment 1
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
235kg, aluminum sulfate 450kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；Then sequentially add
190kg hydroxy polyethers, 55kg propane diols, 40kg PAMA, 10kg silicone emulsion, stir 1～1.5 hour, mistake
In journey, temperature maintains 95～105 DEG C；20kg sulfuric acid is added, stirs 20～40min so as to be often cooled to after mixing
Temperature, shuts down, obtains final product the high-performance liquid accelerator product of the present invention.
Embodiment 2
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
365kg, aluminum sulfate 310kg, calcium sulfate 130kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；So
After sequentially add 110kg hydroxy polyethers, 60kg ethylene glycol, 10kg super high molecular weight polyacrylamide, 5kg silicone emulsion, stirring 1
～1.5 hours, during temperature maintain 95～105 DEG C；10kg sulfuric acid is added, stirs 20～40min so as to mix
After be cooled to normal temperature, shut down, obtain final product the high-performance liquid accelerator product of the present invention.
Embodiment 3
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
130kg, calcium nitrate 500kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；Then sequentially add
200kg hydroxycarboxylic acid, 80kg glycerine, 50kg non-ionic polyacrylamide, 10kg polypropylene glycerol aether, stirring 1～1.5 are little
When, during temperature maintain 95～105 DEG C；30kg permanganic acid is added, stirs 20～40min so as to be cold after mixing
But to normal temperature, shut down, obtain final product the high-performance liquid accelerator product of the present invention.
Embodiment 4
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
245kg, ferric nitrate 430kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；Then sequentially add
220kg calcium lignosulfonate, 60kg isopropanol, 20kg amphion polyacrylamide, 5kg polyoxyethylene polyoxy propyl alcohol amidogen ether,
Stirring 1～1.5 hour, during temperature maintain 95～105 DEG C；20kg phosphoric acid is added, stirs 20～40min so as to be mixed
Normal temperature is cooled to after closing uniformly, shuts down, obtain final product the high-performance liquid accelerator product of the present invention.
Embodiment 5
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
152kg, sodium fluoride 410kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；Then sequentially add
300kg sulfonated melamine compound resin, 50kg pentaerythrite, 30kg non-ionic polyacrylamide, 8kg polydimethylsiloxanes
Alkane, stir 1～1.5 hour, during temperature maintain 95～105 DEG C；50kg boric acid is added, stirs 20～40min so as to
Normal temperature is cooled to after mixing, and is shut down, is obtained final product the high-performance liquid accelerator product of the present invention.
Embodiment 6
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
120kg, aluminum nitrate 200kg, calcium sulfate 270kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；So
After sequentially add 120kg calcium lignosulfonate, 130kg sodium lignin sulfonate, 50kg ethylene glycol, 50kg propane diols, 10kg cloudy from
Sub- super high molecular weight polyacrylamide polyacrylamide, 5kg silicone emulsion, the fatty acid ester compounded thing of 5kg higher alcohols, stirring 1～
1.5 hours, during temperature maintain 95～105 DEG C；40kg peroxy acid is added, stirs 20～40min so as to mix
After be cooled to normal temperature, shut down, obtain final product the high-performance liquid accelerator product of the present invention.
Embodiment 7
As a example by preparing 1000kg product
Prepare high-performance liquid accelerator composition product, its proportioning according to weight meter, in mixing tank put into running water 73kg,
Calcium nitrate 200kg, ferric sulfate 330kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；Then successively
Add 270kg sulfonated melamine compound resin, 70kg isopropanol, 40kg PAMA, 7kg polyoxyethylene polyoxy
Propyl alcohol amidogen ether, stir 1～1.5 hour, during temperature maintain 95～105 DEG C；Add 10kg sulfuric acid, stirring 20～
40min so as to be cooled to normal temperature after mixing, shuts down, obtains final product the high-performance liquid accelerator product of the present invention.
Embodiment 8
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
121kg, ferric nitrate 200kg, sodium fluoride 350kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；So
After sequentially add 80kg naphthalene sulfonic acid-formaldehyde condensation product, 100kg sulfonated melamine compound resin, 40kg glycerine, 50 isopropanols,
20kg non-ionic polyacrylamide, 9kg polyoxyethylene polyoxypropylene glycerin ether, stir 1～1.5 hour, during temperature maintain
At 95～105 DEG C；30kg phosphoric acid is added, stirs 20～40min so as to normal temperature after mixing, is cooled to, shut down, obtain final product this
The high-performance liquid accelerator product of invention.
Embodiment 9
As a example by preparing 1000kg product
High-performance liquid accelerator composition product is prepared, its proportioning puts into running water according to weight meter, in mixing tank
125kg, calcium nitrate 580kg, stir 2～4 hours until abundant solvent under conditions of 95～105 DEG C；Then sequentially add
140kg magnesium lignosulfonate, 80kg isopropanol, 50kg amphion polyacrylamide, the fatty acid ester compounded thing of 5kg higher alcohols,
Stirring 1～1.5 hour, during temperature maintain 95～105 DEG C；20kg boric acid is added, stirs 20～40min so as to be mixed
Normal temperature is cooled to after closing uniformly, shuts down, obtain final product the high-performance liquid accelerator product of the present invention.
The performance indications of product of the present invention are as follows：
The detection project and technical requirements of high-performance liquid accelerator composition, is divided into homogeneity index and physical performance index,
Detection and technical indicator are shown in Tables 1 and 2.
The homogeneity Indexs measure item of 1 product of table and technical indicator
| Detection project | Unit | Index |
| Outward appearance | / | Uniform liquid, slightly yellow |
| Density | g/cm3 | 1.20±0.05 |
| Solid content | m3 | ≥40 |
| pH | / | 2±1 |
| Alkali content | % | ≤0.1 |
| Cl- | % | ≤0.01 |
| Smell | / | No |
2 physical property detection of table and technical indicator
As seen from the above table, the product of the present invention there is alkali-free, nothing chlorine, nontoxic, tasteless and nonirritant, have rapid hardening, low corrosion, height concurrently
The advantages of intensity.
It should be noted that above example is only in order to illustrative and not limiting technical scheme, although with reference to upper
State embodiment to be described in detail the present invention, it will be understood by those within the art that：Still can be to the present invention
Modify or equivalent, any modification or partial replacement without departing from the spirit and scope of the present invention, which all should be contained
Cover in scope of the presently claimed invention.
Claims (9)
1. a kind of high-performance liquid accelerator composition, it is characterised in that the composition is by the raw material of following weight percents
Composition：40～60% inorganic salts, 10～30% rheological agent, 5～10% polyalcohol, 1～5% inorganic acid, 1～5% flocculation
Agent, 0.5～1% defoamer, balance of water；Wherein, the percentage by weight sum of above-mentioned each raw material is 100%.
2. a kind of high-performance liquid accelerator composition according to claim 1, it is characterised in that the composition includes
Seven kinds of schemes below：
Scheme one：Inorganic salts 50%, rheological agent 20%, polyalcohol 8%, inorganic acid 3%, flocculant 5%, defoamer 1%, water 13%；
Scheme two：Inorganic salts 43%, rheological agent 22%, polyalcohol 6%, inorganic acid 2%, flocculant 2%, defoamer 0.5%, water 24.5%；
Scheme three：Inorganic salts 41%, rheological agent 30%, polyalcohol 5%, inorganic acid 5%, flocculant 3%, defoamer 0.8%, water 15.2%；
Scheme four：Inorganic salts 47%, rheological agent 25%, polyalcohol 10%, inorganic acid 4%, flocculant 1%, defoamer 1%, water 12%；
Scheme five：Inorganic salts 53%, rheological agent 27%, polyalcohol 7%, inorganic acid 1%, flocculant 4%, defoamer 0.7%, water 7.3%；
Scheme six：Inorganic salts 55%, rheological agent 18%, polyalcohol 9%, inorganic acid 3%, flocculant 2%, defoamer 0.9%, water 12.1%；
Scheme seven：Inorganic salts 58%, rheological agent 14%, polyalcohol 8%, inorganic acid 2%, flocculant 5%, defoamer 0.5%, water 12.5%.
3. a kind of high-performance liquid accelerator composition according to claim 1 and 2, it is characterised in that the inorganic salts
One or more in aluminum sulfate, aluminum nitrate, calcium sulfate, calcium nitrate, ferric sulfate, ferric nitrate, sodium fluoride.
4. a kind of high-performance liquid accelerator composition according to claim 1 and 2, it is characterised in that the rheological agent
Selected from hydroxycarboxylic acid, naphthalene sulfonic acid-formaldehyde condensation product, sulfonated melamine compound resin, aromatic amino sulphonic acid salt polymer, fat
One kind in fat race hydroxy sulfonate polymer, calcium lignosulfonate, sodium lignin sulfonate, magnesium lignosulfonate, hydroxy polyethers
Or it is multiple.
5. a kind of high-performance liquid accelerator composition according to claim 1 and 2, it is characterised in that the polyalcohol
One or more in ethylene glycol, propane diols, glycerine, isopropanol, pentaerythrite.
6. a kind of high-performance liquid accelerator composition according to claim 1 and 2, it is characterised in that the inorganic acid
Select one or more in phosphoric acid, hydrofluoric acid, sulfuric acid, permanganic acid, peroxy acid, boric acid.
7. a kind of high-performance liquid accelerator composition according to claim 1 and 2, it is characterised in that the flocculant
Selected from PAMA, non-ionic polyacrylamide, amphion polyacrylamide, super high molecular weight polyacrylamide
In one or more.
8. a kind of high-performance liquid accelerator composition according to claim 1 and 2, it is characterised in that the defoamer
Selected from silicone emulsion, the fatty acid ester compounded thing of higher alcohols, polyoxyethylene polyoxypropylene pentaerythrite ether, polyoxyethylene polyoxy propyl alcohol
One or more in amidogen ether, polypropylene glycerol aether, polyoxyethylene polyoxypropylene glycerin ether, dimethyl silicone polymer.
9. the preparation method of a kind of high-performance liquid accelerator composition described in any one of claim 1～8, its feature exist
In comprising the following steps：Water is added in mixing kettle, inorganic salts are subsequently adding, fully dissolve under conditions of 95～105 DEG C and stir
Mix 2～4 hours, polyalcohol, flocculant, defoamer is subsequently adding, be stirred for 1～1.5 hour, add inorganic acid stirring all
Even, normal temperature is cooled to, obtains final product liquid flocculant.
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| CN107473620A (en) * | 2017-08-11 | 2017-12-15 | 五家渠格辉新材料有限责任公司 | A kind of alkali-free liquid concrete accelerator and its preparation method and application |
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| CN113480221A (en) * | 2021-08-02 | 2021-10-08 | 江西立晶新材料科技有限公司 | Liquid alkali-free accelerator and preparation method and application thereof |
| CN113998915A (en) * | 2021-10-27 | 2022-02-01 | 陕西科之杰新材料有限公司 | Liquid alkali-free accelerator and preparation method thereof |
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| CN110713190B (en) * | 2018-12-29 | 2022-04-22 | 江苏苏博特新材料股份有限公司 | Sulfur-free, fluorine-free and alkali-free liquid accelerator and preparation method thereof |
| CN113480221A (en) * | 2021-08-02 | 2021-10-08 | 江西立晶新材料科技有限公司 | Liquid alkali-free accelerator and preparation method and application thereof |
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