CN106431059A - Alkali-free liquid accelerating agent for spraying concrete and preparing method thereof - Google Patents
Alkali-free liquid accelerating agent for spraying concrete and preparing method thereof Download PDFInfo
- Publication number
- CN106431059A CN106431059A CN201610814134.6A CN201610814134A CN106431059A CN 106431059 A CN106431059 A CN 106431059A CN 201610814134 A CN201610814134 A CN 201610814134A CN 106431059 A CN106431059 A CN 106431059A
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- China
- Prior art keywords
- alkali
- free liquid
- afluon
- asta
- accelerator
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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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- 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 discloses an alkali-free liquid accelerating agent for spraying concrete and a preparing method thereof, and belongs to the field of building materials. The alkali-free liquid accelerating agent is prepared from, by weight, 20%-40% of aluminum sulfate, 1%-3% of magnesium fluoride, 10%-15% of hydrofluoric acid, 5%-15% of sodium fluoride, 0.3%-3% of water glass, 0.1%-1.0% of triethanolamine, 0.1%-1.0% of polyacrylamide and the balance water, and the total weight of all the components meet 100%. The obtained accelerating agent is the viridescent thick liquid, the density is 1.35 g/cm<3> to 1.45 g/cm<3>, the pH value is 3.5 to 4.0, and the solid content is 40% to 50%. The raw materials are wide in source and low in cost, devices used in production are the normal pressure and temperature devices, the investment cost is small, the production process is simple, and the alkali-free liquid accelerating agent has the good general popularization performance, and is suitable for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of alkali-free liquid accelerator for gunite concrete and preparation method thereof, belongs to construction material
Field.
Background technology
In domestic jetting cement work progress, the use of alkaline accelerator still occupies great proportion.Conventional alkaline rapid hardening
Agent has extremely disadvantageous impact to late strength of concrete, and late strength of concrete can be made to lose at most up to 50%.Partial alkaline
Also contain chloride ion in accelerator, have corrosiveness to bar construction.
Alkaline accelerator causes very big wound by channels such as sputtering and directly contacts in work progress to construction worker
, there is great construction safety hidden danger in evil.But due to low cost, the reason such as volume is little, setting time is fast, still in the market
Occupy leading position.
In recent years, with the raising of construction requirement and the progress of related-art technology, the low alkali accelerator in part starts to take
Generation alkaline accelerator, by contrast, low alkali accelerator reduces the late strength of concrete extent of damage, to environment and personnel
Harm is also reduced, but does not still fundamentally solve the shortcoming containing alkali accelerator, during low alkali accelerator use, is mixed
Solidifying soil later strength is lost still up to 15% ~ 20%, and the low alkali accelerator of liquid has to workmen's exposed position compared with major injury, powder
There is airborne dust problem etc. in agent accelerator.The engineering project of part high-quality requirement cannot be met, also with social development background under
Environmental protection theme runs in the opposite direction.
In order to meet high-quality construction of shotcrete engine request, the research to alkali-free liquid accelerator is compeled in eyebrow
Eyelash.High-quality concrete construction will not only meet the requirement of concrete itself, will more protect constructor in work progress
Member's is healthy.For the development of alkali-free liquid accelerator, China has carried out the research work of correlation, but is available for industrialization
Production, excellent performance shaped article actually rare.Related product is mainly rested in outside some famous transnational concrete
Plus agent manufacturer, but as unit price is expensive, actually rare in the use of China at present.
Content of the invention
The present invention is intended to provide a kind of alkali-free liquid accelerator for gunite concrete and preparation method thereof.
The invention provides a kind of alkali-free liquid accelerator for gunite concrete, including the original of following percentage by weight
Material：
Aluminum sulfate：20～40%, Afluon (Asta)：1～3%, Fluohydric acid.：10～15%, sodium fluoride：5～15%, waterglass：0.3～3%,
Triethanolamine：0.1～1.0%, polyacrylamide：0.1～1.0%, remaining is that water, each component weight meets 100%；
Gained accelerator is absinthe-green thick liquid, and density is 1.35g/cm3～1.45g/cm3, pH value is 3.5～4.0, Gu
Content is 40%～50%.
Further, the aluminum sulfate is Al2O3The technical grade sulfuric acid aluminum of content >=16%；The Afluon (Asta) be purity >=
99% technical grade Afluon (Asta)；The Fluohydric acid. is the technical grade hydrofluoric acid aqueous solution of HF content >=40%；The sodium fluoride is pure
The technical grade sodium fluoride of degree >=98%；The waterglass is modulus 2.4～2.6, the sodium silicate of Baume degrees 38.4～48.3 is water-soluble
Liquid；The triethanolamine is the technical grade triethanolamine of purity >=85%；The polyacrylamide is purity >=98%, 80 mesh of particle diameter
Technical grade polyacrylamide.
The invention provides the preparation method of the alkali-free liquid accelerator for gunite concrete, including following step
Suddenly：
（1）Aluminum sulfate, Afluon (Asta) is weighed, after grinder grinding 15min, crosses 300 mesh sieves；
（2）Weigh Fluohydric acid., after being dissolved in water, add ground aluminum sulfate, Afluon (Asta), under room temperature blender with 1000 turns/
The mixing speed that divides quickly stirs 15min, until being completely dissolved；
（3）Sodium fluoride is added step（2）In solution after stirring, stirred to being completely dissolved with 300 revs/min of speed；
（4）Triethanolamine is weighed, adds step（3）In solution after stirring, 5min is stirred with 100 revs/min of speed；
（5）In step（4）Polyacrylamide is added in the system that stirring is finished, after being completely dissolved, stand 30min；
（6）It is eventually adding waterglass, stirring at low speed（100 revs/min）To uniform state, obtain light green viscous solution and be final producing
Product：Alkali-free liquid accelerator.
Above-mentioned preparation method is carried out in the container (glass, pottery or rustless steel etc.) of acid corrosion-resistant.
Aluminum sulfate, Afluon (Asta), sodium fluoride employed in the present invention is main rapid hardening composition, by changing cement granules table
The zeta potential in face, affects the retarding effect of Gypsum Fibrosum, so as to significantly shorten the presetting period of the setting time of cement, particularly cement.
Sodium fluoride can promote the formation of the internal hydras structure of cement, can improve shear strength, the impermeability of concrete of concrete
And the cohesive force of concrete and rebar, test and show that sodium fluoride has to the final setting time of cement significant shortening to act on.Three second
The function of hydramine is to shorten the setting time of cement to a certain extent and early age strength of concrete is significantly increased, especially
It is that 1d comprcssive strength can improve 20%～40%, polyacrylamide is a kind of organic adhesion promoting component, is usually used in not disperseing under water to mix
The preparation of solidifying soil, which is added by a certain percentage can improve the cohesiveness of concrete in accelerator, improve the thickness of jetted layers
Spend and improve the adhesion strength between concrete and matrix, reduce the rebound loss in course of injection, save material.
Beneficial effects of the present invention：
Present invention is mainly used for concrete spraying, no airborne dust in work progress, to workmen's respiratory tract non-hazardous, construction environment
Also than conventional powder accelerator, the feature of environmental protection is had more, the accelerator composition is nontoxic corrosion-free, even if being splashed to the exposed limb of workmen
On body, harm is not resulted in yet, be safety in production there is provided guarantee；The suitability of the present invention is extensive, and can be used for various high-quality will
The engineering project that asks, preferable to cement adaptability, setting time is in suitable construction requirement scope, and late strength of concrete
Free of losses, can effectively improve concrete tack, and work progress falling loss is little, improves efficiency of construction, reduces and be constructed into
This, accelerate engineering fltting speed；The present invention is raw materials used to be used in modern industry production extremely extensive raw material, source
Extensively, cheap, in production, device therefor is normal temperature and pressure equipment, and cost of investment is little, and production process is simple, with good
Popularity, suitable mass industrialized production.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following examples.
Embodiment 1：
Present embodiments provide a kind of alkali-free liquid accelerator for gunite concrete：
By aluminum sulfate 25%, Afluon (Asta) 1%, Fluohydric acid. 10%, sodium fluoride 5%, triethanolamine 0.1%, polyacrylamide 0.1%,
Waterglass 0.3%, the percentage by weight of water 58.5% are formulated.
The aluminum sulfate is Al2O3The technical grade sulfuric acid aluminum of content >=16%；The Afluon (Asta) is the technical grade of purity >=99%
Afluon (Asta)；The Fluohydric acid. is the technical grade hydrofluoric acid aqueous solution of HF content >=40%；The sodium fluoride is the work of purity >=98%
Industry level sodium fluoride；The waterglass is modulus 2.4～2.6, the sodium silicate aqueous solution of Baume degrees 38.4～48.3；Three ethanol
Amine is the technical grade triethanolamine of purity >=85%；The polyacrylamide is purity >=98%, the technical grade poly- third of 80 mesh of particle diameter
Acrylamide.
Preparation method is：
（1）Aluminum sulfate, Afluon (Asta) is weighed, after grinder grinds, crosses 300 mesh sieves；
（2）Weigh Fluohydric acid., after being dissolved in water, add ground aluminum sulfate, Afluon (Asta), under room temperature blender with 1000 turns/
The mixing speed that divides quickly stirs 15min, until being completely dissolved；
（3）Sodium fluoride is added step（2）In solution after stirring, stirred to being completely dissolved with 300 revs/min of speed；
（4）Triethanolamine is weighed, adds step（3）In solution after stirring, 5min is stirred with 100 revs/min of speed；
（5）In step（4）Polyacrylamide is added in the system that stirring is finished, after being completely dissolved, stand 30min；
（6）It is eventually adding waterglass, stirring at low speed（100 revs/min）To uniform state, obtain light green viscous solution and be final producing
Product：Alkali-free liquid accelerator.
Embodiment 2：
Present embodiments provide a kind of alkali-free liquid accelerator for gunite concrete：
By aluminum sulfate 27%, Afluon (Asta) 1.5%, Fluohydric acid. 11%, sodium fluoride 7%, triethanolamine 0.3%, polyacrylamide
0.3%th, waterglass 0.8%, the percentage by weight of water 52.1% are formulated.
Preparation method is with embodiment 1.
Embodiment 3：
Present embodiments provide a kind of alkali-free liquid accelerator for gunite concrete：
By aluminum sulfate 30%, Afluon (Asta) 2%, Fluohydric acid. 12%, sodium fluoride 10%, triethanolamine 0.5%, polyacrylamide 0.5%,
Waterglass 1.5%, the percentage by weight of water 43.5% are formulated.
Preparation method is with embodiment 1.
Embodiment 4：
Present embodiments provide a kind of alkali-free liquid accelerator for gunite concrete：
By aluminum sulfate 35%, Afluon (Asta) 2.5%, Fluohydric acid. 14%, sodium fluoride 13%, triethanolamine 0.7%, polyacrylamide
0.7%th, waterglass 2.3%, the percentage by weight of water 31.8% are formulated.
Preparation method is with embodiment 1.
Embodiment 5：
Present embodiments provide a kind of alkali-free liquid accelerator for gunite concrete：
By aluminum sulfate 40%, Afluon (Asta) 3%, Fluohydric acid. 15%, sodium fluoride 15%, triethanolamine 1.0%, polyacrylamide 1.0%,
Waterglass 3%, the percentage by weight of water 22% are formulated.
Preparation method is with embodiment 1.
The alkali-free quick-coagulant for preparing is by 0.4 water-cement ratio making cement test setting time, sand：Cement：Water=3:2:1 water
Gray scale making cement cement mortar strength is tested.Test cement used is the P.O42.5 reference cement in Shandong Luneng cement plant, benchmark used
The husky benchmark sand that produces for Xiamen Ai Si normal sand company limited, test method and examination criteria are with reference to JC477-2005《Spray
Penetrate concrete accelerator》、GB/T17671-1999《Test method for strength of hydraulic cement mortar》、GB/T1346-2011《Cement standard
Denseness water consumption, setting time, the stability method of inspection》、GB8076-2008《Concrete admixture》.
It is embodied as effect as shown in the table：
Accelerator chloride ion content of the present invention, alkali content, setting time and 1d, 28d, 90d be can be seen that by data in table
Intensity all reaches JC477-2005《Gunite concrete accelerator》Technical requirement.
The present invention is applied to gunite concrete, as a result shows：Concrete coagulation effect is good, later strength height, and this
Bright alkali-free chlorine-free, has no adverse effect to concrete performance, and requiring in high-quality can be safe to use in engineering construction；The present invention gives birth to
Production. art is simple, and cost of material is relatively low, is worth with good popularity.
Claims (4)
1. a kind of alkali-free liquid accelerator for gunite concrete, it is characterised in that including the raw material of following percentage by weight：
Aluminum sulfate：20～40%, Afluon (Asta)：1～3%, Fluohydric acid.：10～15%, sodium fluoride：5～15%, waterglass：0.3～3%,
Triethanolamine：0.1～1.0%, polyacrylamide：0.1～1.0%, remaining is that water, each component weight meets 100%；
Gained accelerator is absinthe-green thick liquid, and density is 1.35g/cm3～1.45g/cm3, pH value is 3.5～4.0, Gu
Content is 40%～50%.
2. the alkali-free liquid accelerator for gunite concrete according to claim 1, it is characterised in that：The aluminum sulfate
For Al2O3The technical grade sulfuric acid aluminum of content >=16%；The Afluon (Asta) is the technical grade Afluon (Asta) of purity >=99%；The Fluohydric acid.
Technical grade hydrofluoric acid aqueous solution for HF content >=40%；The sodium fluoride is the technical grade sodium fluoride of purity >=98%；The water
Glass is modulus 2.4～2.6, the sodium silicate aqueous solution of Baume degrees 38.4～48.3；The triethanolamine is the work of purity >=85%
Industry level triethanolamine；The polyacrylamide is purity >=98%, the technical grade polyacrylamide of 80 mesh of particle diameter.
3. the preparation method of the alkali-free liquid accelerator for gunite concrete described in a kind of claim 1 or 2, its feature exists
In：Comprise the following steps：
（1）Aluminum sulfate, Afluon (Asta) is weighed, after grinder grinds, crosses 300 mesh sieves；
（2）Weigh Fluohydric acid., after being dissolved in water, add ground aluminum sulfate, Afluon (Asta), under room temperature blender with 1000 turns/
The mixing speed that divides quickly stirs 15min, until being completely dissolved；
（3）Sodium fluoride is added step（2）In solution after stirring, stirred to being completely dissolved with 300 revs/min of speed；
（4）Triethanolamine is weighed, adds step（3）In solution after stirring, 5min is stirred with 100 revs/min of speed；
（5）In step（4）Polyacrylamide is added in the system that stirring is finished, after being completely dissolved, stand 30min；
（6）Waterglass is eventually adding, with 100 revs/min of stirring at low speed to uniform state, is obtained light green viscous solution and be final producing
Product：Alkali-free liquid accelerator.
4. the preparation method of the alkali-free liquid accelerator for gunite concrete according to claim 3, it is characterised in that：
The preparation method is carried out in the glass, ceramic or rustless steel container of acid corrosion-resistant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610814134.6A CN106431059A (en) | 2016-09-09 | 2016-09-09 | Alkali-free liquid accelerating agent for spraying concrete and preparing method thereof |
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| CN201610814134.6A CN106431059A (en) | 2016-09-09 | 2016-09-09 | Alkali-free liquid accelerating agent for spraying concrete and preparing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986674A (en) * | 2018-01-23 | 2018-05-04 | 云南森博混凝土外加剂有限公司 | A kind of alkali-free quick-coagulant |
| CN108178552A (en) * | 2018-01-23 | 2018-06-19 | 云南森博混凝土外加剂有限公司 | A kind of preparation method of alkali-free quick-coagulant |
| CN117602911A (en) * | 2024-01-22 | 2024-02-27 | 江苏欧西建材科技发展有限公司 | Saline-alkali-resistant rapid repair mortar and preparation method thereof |
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|---|---|---|---|---|
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN101475335A (en) * | 2009-01-13 | 2009-07-08 | 江苏博特新材料有限公司 | Liquid accelerator for sprayed concrete and preparation thereof |
| CN102219425A (en) * | 2011-04-15 | 2011-10-19 | 中铁隧道集团有限公司 | Alkali-free liquid accelerating agent and preparation method thereof |
| CN102219433A (en) * | 2011-05-04 | 2011-10-19 | 山西潞安环保能源开发股份有限公司 | Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof |
| CN105753364A (en) * | 2016-01-25 | 2016-07-13 | 湖南省建筑工程集团总公司 | Alkali-free high-strength concrete flash setting admixture |
-
2016
- 2016-09-09 CN CN201610814134.6A patent/CN106431059A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423356A (en) * | 2008-11-20 | 2009-05-06 | 同济大学 | Environment-friendly type alkali-free liquid accelerator for sprayed concrete and preparation method thereof |
| CN101475335A (en) * | 2009-01-13 | 2009-07-08 | 江苏博特新材料有限公司 | Liquid accelerator for sprayed concrete and preparation thereof |
| CN102219425A (en) * | 2011-04-15 | 2011-10-19 | 中铁隧道集团有限公司 | Alkali-free liquid accelerating agent and preparation method thereof |
| CN102219433A (en) * | 2011-05-04 | 2011-10-19 | 山西潞安环保能源开发股份有限公司 | Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof |
| CN105753364A (en) * | 2016-01-25 | 2016-07-13 | 湖南省建筑工程集团总公司 | Alkali-free high-strength concrete flash setting admixture |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107986674A (en) * | 2018-01-23 | 2018-05-04 | 云南森博混凝土外加剂有限公司 | A kind of alkali-free quick-coagulant |
| CN108178552A (en) * | 2018-01-23 | 2018-06-19 | 云南森博混凝土外加剂有限公司 | A kind of preparation method of alkali-free quick-coagulant |
| CN117602911A (en) * | 2024-01-22 | 2024-02-27 | 江苏欧西建材科技发展有限公司 | Saline-alkali-resistant rapid repair mortar and preparation method thereof |
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Application publication date: 20170222 |
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