CN107200497A - A kind of chlorine-free alkali-free liquid accelerating agent and preparation method thereof - Google Patents
A kind of chlorine-free alkali-free liquid accelerating agent and preparation method thereof Download PDFInfo
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- CN107200497A CN107200497A CN201710509481.2A CN201710509481A CN107200497A CN 107200497 A CN107200497 A CN 107200497A CN 201710509481 A CN201710509481 A CN 201710509481A CN 107200497 A CN107200497 A CN 107200497A
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- Prior art keywords
- chlorine
- accelerating agent
- free
- liquid accelerating
- free liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011777 magnesium Substances 0.000 claims abstract description 25
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 25
- 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 19
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 150000004645 aluminates Chemical class 0.000 claims abstract description 14
- 239000012452 mother liquor Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 150000001412 amines Chemical class 0.000 claims abstract description 13
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims abstract description 11
- 150000007524 organic acids Chemical class 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- 239000008367 deionised water Substances 0.000 claims abstract description 10
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 9
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims abstract description 9
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims abstract description 6
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 4
- 239000004310 lactic acid Substances 0.000 claims description 4
- 235000014655 lactic acid Nutrition 0.000 claims description 4
- 235000002906 tartaric acid Nutrition 0.000 claims description 4
- 239000011975 tartaric acid Substances 0.000 claims description 4
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- WUGQZFFCHPXWKQ-UHFFFAOYSA-N Propanolamine Chemical compound NCCCO WUGQZFFCHPXWKQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 3
- 229960004889 salicylic acid Drugs 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 230000000996 additive effect Effects 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 13
- 239000000243 solution Substances 0.000 description 13
- 239000003643 water by type Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000011575 calcium Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 229910001653 ettringite Inorganic materials 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000011378 shotcrete Substances 0.000 description 4
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 235000015165 citric acid Nutrition 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 3
- 229940043237 diethanolamine Drugs 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 159000000013 aluminium salts Chemical class 0.000 description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 235000013024 sodium fluoride Nutrition 0.000 description 2
- 239000011775 sodium fluoride Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000186216 Corynebacterium Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- LLJZKKVYXXDWTB-UHFFFAOYSA-N acetic acid;sodium Chemical compound [Na].[Na].CC(O)=O LLJZKKVYXXDWTB-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910001586 aluminite Inorganic materials 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001934 delay 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
- 230000008034 disappearance Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003152 propanolamines Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to additive preparing technical field, and in particular to a kind of chlorine-free alkali-free liquid accelerating agent and preparation method thereof.Aluminum sulfate and aluminium hydroxide are added in deionized water and heat to obtain aluminate mother liquor by the present invention, magnesium fluosilicate and disodium ethylene diamine tetraacetate are added in deionized water again and heat to obtain magnesium fluosilicate solution, then magnesium fluosilicate solution is mixed with aluminate mother liquor, add organic amine, organic acid and stabilizer stirring, produce chlorine-free alkali-free liquid accelerating agent, gained accelerator of the invention has volume small, the characteristics of rapid hardening effect is good, after use simultaneously, mechanical performance of concrete can be improved, its compression strength is improved, is a kind of preferable concrete admixture.
Description
Technical field
The invention belongs to additive preparing technical field, and in particular to a kind of chlorine-free alkali-free liquid accelerating agent and its preparation side
Method.
Background technology
In rapid construction engineering, Geotechnical Engineering and subterranean tunnel building course, accelerator is often mixed in concrete.Mix
The purpose for entering accelerator is to promote the rate of set of concrete, the strength development course for accelerating concrete and the new construction coagulation of reduction
Soil caused danger peeled off with basic unit due to deadweight in the plastic stage, so as to realize the structures such as facade, top plate, vault
Quick, big thickness construction.
Conventional concrete accelerator can be divided into two kinds of alkaline powdery and alkali liquid accelerator.It is main from the point of view of service condition
There is following problem：1. higher alkali content, on the one hand compromises the health of workmen, on the other hand may also draw
Alkali-aggregate reaction in concrete is played, causes concrete strength and durability to decline；2. dust is big, and dust raising phenomenon is serious, pollutes environment；
3. it is not easy to Wet-mix for Shotcrete operation etc..Although alkali-free powder accelerator overcomes that traditional accelerator alkali content is high to ask
Topic, but therefore, fail to be used widely in the presence of the problem of uneven and dust is big is added in work progress.In recent years, by
Aluminium salt arrives broad development with the sour alkali-free liquid concrete accelerator being composited, due to not chloride in alkali-free liquid accelerating agent
Ion, basic ion, so that will not Corrosion Reinforcement, body that is free from environmental pollution, not injuring operating personnel.It effectively overcomes powdery speed
The problem of solidifying agent, conventional powdered accelerator is progressively replaced.
At present, people successfully have developed some alkali-free liquid accelerating agent products.Such as number of patent application
CN200810203051.9 discloses a kind of " environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof ", its by
Aluminum sulfate, sodium fluoride, triethanolamine and polyacrylamide composition, wherein aluminum sulfate and sodium fluoride are main rapid hardening component, with
Polyacrylamide is organic adhesion promoting component, improves the thickness of a jetted layers and improves the adhesion strength between concrete and matrix,
The rebound loss in course of injection is reduced, material is saved.
And for example number of patent application CN201110112424.3 disclose " a kind of alkali-free chlorine-free liquid concrete accelerator and its
Preparation method and application ", the product includes following components：Aluminium salt, inorganic acid, Organic Alcohol, hydramine, complexant and water.Wherein, should
Accelerator is using aluminum sulfate as main rapid hardening composition, then using organic amine as increasing stick component, improves jetted layers thickness, reduce
Rebound loss.
From above-mentioned patented technology can be seen that existing alkali-free liquid accelerating agent in main rapid hardening composition be aluminum sulfate.Sulphur
The Ca that aluminium ion in sour aluminium can be produced with hydrated cementitious（OH）2The productions such as reaction generation drated calcium aluminate, hydrated calcium aluminate sulfate
Thing, makes cement slurry produce condensation, but being introduced into for sulfate ion in aluminum sulfate will make the sulfuric acid in hydrated cementitious environment
Ion concentration increases, and causes entringite content increase in hydrated product, delays clinker C3A hydration process, extension is solidifying
The knot time.This, which is resulted in, reaches that the setting time of requirement must just use more aluminum sulfate.Therefore at present based on aluminum sulfate
Want the alkali-free liquid accelerator of rapid hardening composition very big using volume（Highest volume can reach 12%）.However, aluminum sulfate is mixed
When amount is very big, the sulfate radical of high content can be introduced in concrete, and concrete causes when sulphates content is higher
The possibility that secondary ettringite occurs in gunite concrete is greatly increased, and the formation of secondary ettringite can form swelling stress so that
Concrete cracking even completely loses mechanical property.Therefore, how to overcome prior art not enough, a kind of volume of exploitation is small, rapid hardening
Effect is good, and will not cause after concrete cracking, the accelerator also being had no adverse effects to mechanical performance of concrete, as industry
Interior urgent problem to be solved.
The content of the invention
Present invention mainly solves technical problem：Have that volume is big for existing alkali-free liquid accelerating agent, rapid hardening effect not
Ideal, and easily make concrete cracking using rear, or even there is provided a kind of chlorine-free alkali-free liquid rapid hardening the problem of forfeiture mechanical property
Agent and preparation method thereof.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of chlorine-free alkali-free liquid accelerating agent, it is characterised in that the chlorine-free alkali-free liquid accelerating agent is by aluminum sulfate, hydroxide
Aluminium, magnesium fluosilicate, disodium ethylene diamine tetraacetate, organic amine, organic acid, stabilizer and deionized water composition；The matter of each composition
Measuring percentage is：30~40% aluminum sulfate, 10~15% aluminium hydroxides, 4~6% magnesium fluosilicates, 2~5% disodium ethylene diamine tetraacetates,
1~4% organic amine, 1~3% organic acid, 0.5~2% stabilizer, surplus is deionized water.
The organic amine is any one in diethanol amine, triethanolamine, Propanolamine.
The organic acid is the one or more in citric acid, tartaric acid, lactic acid, salicylic acid.
The stabilizer is phosphoric acid.
A kind of preparation method of chlorine-free alkali-free liquid accelerating agent, specific preparation process is：
S1. aluminum sulfate and aluminium hydroxide are added in deionized water, is heated to 80~90 DEG C, it is anti-with 300~400r/min stirrings
1~2h is answered, aluminate mother liquor is obtained；
S2. magnesium fluosilicate and disodium ethylene diamine tetraacetate are added in deionized water, 50~60 DEG C is heated to, with 300~400r/
Min is stirred to solid and is completely dissolved, and obtains magnesium fluosilicate solution；
S3. magnesium fluosilicate solution is added dropwise in aluminate mother liquor with 1~2mL/min, stirred with 300~400r/min to dropwise addition
Finish, add organic amine and organic acid, continue to stir 30~40min, be cooled to after room temperature and add stabilizer, with 200~
300r/min stirs 10~20min, obtains chlorine-free alkali-free liquid accelerating agent.
The beneficial effects of the invention are as follows：
Accelerator prepared by the present invention provides Al initial stage3+And SO4 2-With the C in cement3Ca in A and solution2+With reference to generation calcium
Aluminite, and occur by disodium ethylene diamine tetraacetate and metal ion it is coordination cross-linked, by the corynebacterium entringite of generation not medium well
Length becomes elongated needle-like entringite and mutually overlapped, while gel C-S-H grows and is filled near entringite
Entringite gap, due to Ca in slurry solution2+Concentration declines, C3The calcium silicon layer on S surfaces is destroyed, the C in cement3S starts water
Change the substantial amounts of C-S-H of generation to be enclosed in around entringite, and fill the space of its formation, make cement slurry lost flowability,
Promote the condensation of cement slurry, while F-With hydrolysis product of cement Ca in cement slurry（OH）2Reaction generation solubility is smaller
CaF2, substantial amounts of crystal is separated out, due to substantial amounts of Ca2+It is consumed, it is difficult in C3S surfaces form double electrical layerses, make C3S is lured
Phase disappearance is led, the deferred action of gypsum in cement is eliminated, cement is able to condense rapidly, the early strength of cement is improved.In addition, because
Chlorine-free alkali-free liquid accelerating agent prepared by the present invention, reduces the sulfate radical that high content is introduced in concrete, so that spray
Penetrate the possibility that secondary ettringite occurs in concrete to substantially reduce, reduce the swelling stress that secondary ettringite formation is produced, improve
The cracking performance of concrete, improves mechanical property.
Embodiment
Take 30~40g aluminum sulfate and 10~15g aluminium hydroxides to add in 15~30mL deionized waters, be heated to 80~90
DEG C, with 300~400r/min, 1~2h of stirring reaction, aluminate mother liquor is obtained, then take 4~6g magnesium fluosilicates and 2~5g ethylenediamine tetraacetics
Acetic acid disodium, adds in 10~20mL deionized waters, is heated to 50~60 DEG C, stirs complete to solid with 300~400r/min
Dissolving, is obtained magnesium fluosilicate solution, is then added dropwise to magnesium fluosilicate solution in aluminate mother liquor with 1~2mL/min, with 300~
400r/min is stirred to completion of dropping, and keeping temperature is 60~80 DEG C, adds 1~4g organic amines, 1~3g organic acids, 60
Continue to stir 30~40min at~80 DEG C, be cooled to addition 0.5~2.0g stabilizers after room temperature, then stir with 200~300r/min
10~20min is mixed, chlorine-free alkali-free liquid accelerating agent is obtained.The organic amine is any in diethanol amine, triethanolamine, Propanolamine
It is a kind of.The organic acid is the one or more in citric acid, tartaric acid, lactic acid, salicylic acid.The stabilizer is phosphoric acid.
Example 1
Take 30g aluminum sulfate and 10g aluminium hydroxides to add in 15mL deionized waters, 80 DEG C are heated to, with 300r/min stirring reactions
1h, obtains aluminate mother liquor, then takes 4g magnesium fluosilicates and 2g disodium ethylene diamine tetraacetates, adds in 10mL deionized waters, is heated to
50 DEG C, stirred to solid and be completely dissolved with 300r/min, obtain magnesium fluosilicate solution, then by magnesium fluosilicate solution with 1mL/min
It is added dropwise in aluminate mother liquor, is stirred with 300r/min to completion of dropping, keeping temperature is 60 DEG C, adds 1g diethanol amine,
1g citric acids, are continued to stir 30min at 60 DEG C, are cooled to addition 0.5g phosphoric acid after room temperature, then stirred with 200r/min
10min, obtains chlorine-free alkali-free liquid accelerating agent.
Example 2
Take 35g aluminum sulfate and 13g aluminium hydroxides to add in 23mL deionized waters, 85 DEG C are heated to, with 350r/min stirring reactions
1h, obtains aluminate mother liquor, then takes 5g magnesium fluosilicates and 4g disodium ethylene diamine tetraacetates, adds in 15mL deionized waters, is heated to
55 DEG C, stirred to solid and be completely dissolved with 350r/min, obtain magnesium fluosilicate solution, then by magnesium fluosilicate solution with 1mL/min
It is added dropwise in aluminate mother liquor, is stirred with 350r/min to completion of dropping, keeping temperature is 70 DEG C, adds 3g triethanolamines,
2g tartaric acid, is continued to stir 35min at 70 DEG C, is cooled to addition 1.3g phosphoric acid after room temperature, then stirred with 250r/min
15min, obtains chlorine-free alkali-free liquid accelerating agent.
Example 3
Take 40g aluminum sulfate and 15g aluminium hydroxides to add in 30mL deionized waters, 90 DEG C are heated to, with 400r/min stirring reactions
2h, obtains aluminate mother liquor, then takes 6g magnesium fluosilicates and 5g disodium ethylene diamine tetraacetates, adds in 20mL deionized waters, is heated to
60 DEG C, stirred to solid and be completely dissolved with 400r/min, obtain magnesium fluosilicate solution, then by magnesium fluosilicate solution with 2mL/min
It is added dropwise in aluminate mother liquor, is stirred with 400r/min to completion of dropping, keeping temperature is 80 DEG C, adds 4g Propanolamines, 3g
Lactic acid, continues to stir 40min at 80 DEG C, is cooled to addition 2.0g phosphoric acid after room temperature, then stirs 20min with 300r/min, obtains
Chlorine-free alkali-free liquid accelerating agent.
Comparative example：The concrete accelerator of Hefei building materials company production.
According to JC477-2005《Gunite concrete accelerator》Requirement, it is obtained to present example 1~3 without chlorine without
Alkali liquid accelerating agent and the accelerator of comparative example carry out performance detection, and detection project is cement paste setting time and cement mortar
Compression strength.Raw materials used quality and raw materials used quality are distinguished as shown in Table 1 and Table 2, the performance test results such as institute of table 3
Show：
The quality of the raw material of table 1
| Material name | Quality |
| Cement | Portland cement |
| Sand | Iso standard sand |
| Water | Running water |
The quality of raw material needed for table 2 prepares cement paste and cement mortar
The performance test results of table 3
In summary, chlorine-free alkali-free liquid accelerating agent produced by the present invention has volume small, the characteristics of rapid hardening effect is good, makes simultaneously
With rear, mechanical performance of concrete can be improved, its compression strength is improved, be a kind of preferable concrete admixture.
Claims (5)
1. a kind of chlorine-free alkali-free liquid accelerating agent, it is characterised in that the chlorine-free alkali-free liquid accelerating agent is by aluminum sulfate, hydroxide
Aluminium, magnesium fluosilicate, disodium ethylene diamine tetraacetate, organic amine, organic acid, stabilizer and deionized water composition；The matter of each composition
Measuring percentage is：30~40% aluminum sulfate, 10~15% aluminium hydroxides, 4~6% magnesium fluosilicates, 2~5% disodium ethylene diamine tetraacetates,
1~4% organic amine, 1~3% organic acid, 0.5~2% stabilizer, surplus is deionized water.
2. a kind of chlorine-free alkali-free liquid accelerating agent as claimed in claim 1, it is characterised in that the organic amine is diethanol
Any one in amine, triethanolamine, Propanolamine.
3. a kind of chlorine-free alkali-free liquid accelerating agent as claimed in claim 1, it is characterised in that the organic acid be citric acid,
One or more in tartaric acid, lactic acid, salicylic acid.
4. a kind of chlorine-free alkali-free liquid accelerating agent as claimed in claim 1, it is characterised in that the stabilizer is phosphoric acid.
5. a kind of preparation method of chlorine-free alkali-free liquid accelerating agent as claimed in claim 1, it is characterised in that specific to prepare step
Suddenly it is：
S1. aluminum sulfate and aluminium hydroxide are added in deionized water, is heated to 80~90 DEG C, it is anti-with 300~400r/min stirrings
1~2h is answered, aluminate mother liquor is obtained；
S2. magnesium fluosilicate and disodium ethylene diamine tetraacetate are added in deionized water, 50~60 DEG C is heated to, with 300~400r/
Min is stirred to solid and is completely dissolved, and obtains magnesium fluosilicate solution；
S3. magnesium fluosilicate solution is added dropwise in aluminate mother liquor with 1~2mL/min, stirred with 300~400r/min to dropwise addition
Finish, add organic amine and organic acid, continue to stir 30~40min, be cooled to after room temperature and add stabilizer, with 200~
300r/min stirs 10~20min, obtains chlorine-free alkali-free liquid accelerating agent.
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