CN108975752A - A kind of environmental protection alkali-free liquid accelerator and preparation method thereof - Google Patents
A kind of environmental protection alkali-free liquid accelerator and preparation method thereof Download PDFInfo
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- CN108975752A CN108975752A CN201811269794.6A CN201811269794A CN108975752A CN 108975752 A CN108975752 A CN 108975752A CN 201811269794 A CN201811269794 A CN 201811269794A CN 108975752 A CN108975752 A CN 108975752A
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- parts
- alkali
- free liquid
- liquid 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of environmentally friendly alkali-free liquid accelerators and preparation method thereof, belong to building material technical field；Ingredient including following parts by weight: 25-35 parts of aluminum sulfate, 5-20 parts of acrylamide, 1-5 parts of sodium metaphosphate, unsaturated acetic anhydride 1-5 parts, 1-5 parts of unitary unsaturation end hydroxy polyether, 5-8 parts of alkanolamine, 5-20 parts of gleditsia sinensis ethanol extract, 1-5 parts of initiator, 1-3 parts of polyether polyol；The accelerator compounded by mentioned component, not containing sulfate, chloride ion, alkali；Setting time meets relevant national standard requirement, and intensity is higher within 1 day, intensity free of losses in 28 days, and simple production process, and accelerator is free of any severe toxicity and hazardous materials, weakly acidic, influences on the surrounding enviroment of production area smaller.
Description
Technical field
The invention belongs to building material technical field, in particular to a kind of environmentally friendly alkali-free liquid accelerator and preparation method thereof.
Background technique
With the development of wet-spray technique, demand of the market to liquid accelerator is increasing, and gunite concrete is mainly used for
Support engineering, in order to meet supporting construction requirement, the necessary quick-hardening of gunite concrete reaches pre-hardening and whole in a short time
Solidifying, accelerator is to mix the additive that concrete can be made to condense hardening rapidly in concrete, its effect is the water for increasing cement
Change speed, so that concrete is formed enough intensity in a short period of time, to guarantee the construction requirement of support engineering.It is now domestic
Construction of shotcrete largely uses liquid basified accelerator, its intensity early period is higher, but later strength loss is serious, may
It causes a hidden trouble to the safety of engineering.Alkaline accelerator generally has very high alkali content, and in construction, alkaline accelerator not only pollutes
Environment also has very strong corrosivity to human body, and the moment threatens the health of worker, and being especially splashed to human eye can cause to lose
It is bright.
For these problems of alkaline accelerator, domestic many researchers have set about studying alkali free accelerator,
That is alkali-free quick-coagulant.Alkali-free quick-coagulant is generally weakly acidic, substantially reduces to skin corrosivity, increasingly reinforces in environmental protection ideas
Today, alkali-free quick-coagulant gradually replace alkaline accelerator to be trend of the times, and west American-European countries eliminates alkaline rapid hardening completely
Agent, also
There are many countries also vigorously promoting the use alkali-free quick-coagulant.
But from the prior art, there is also use some toxicity or corrosivity higher in the ingredient of alkali-free quick-coagulant
Substance, such as trifluoroacetic acid, hydrofluoric acid etc.；Some related performance indicators are unsatisfactory for relevant national standard；Either
There are problems that expensive and is not easy to transport or needs to process again.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of environmentally protective alkali-free liquid accelerator with
And preparation method；It is easily lost with the higher later strength of alkali-free liquid accelerator toxicity for solving the problem of current.
The present invention is achieved through the following technical solutions.
A kind of environmental protection alkali-free liquid accelerator, the ingredient including following parts by weight: 25-35 parts of aluminum sulfate, acrylamide 5-
20 parts, 1-5 parts of sodium metaphosphate, unsaturated acetic anhydride 1-5 parts, 1-5 parts of unitary unsaturation end hydroxy polyether, 5-8 parts of alkanolamine,
5-20 parts of gleditsia sinensis ethanol extract, 1-5 parts of initiator, 1-3 parts of polyether polyol.
A kind of preparation method of environmental protection alkali-free liquid accelerator, comprising the following steps:
1) acrylamide aqueous solution, unsaturated acetic anhydride aqueous solution, unitary unsaturation end hydroxy polyether, initiator solution are mixed
It closes stirring to be reacted, reaction temperature is 60-80 DEG C, time for adding 0.2-6.0h, and gleditsia sinensis ethyl alcohol is added after being added dropwise and mentions
Liquid is taken, continues that alkanolamine is added after stirring, heat preservation 2-3h obtains mixed reactant；
2) aluminum sulfate aqueous solution and sodium metaphosphate aqueous solution are mixed, keeps the temperature 1-2h at 50-90 DEG C, adds polyether polyols
Alcohol, at the uniform velocity stirring 1-4h；Obtain the alkali-free liquid accelerator.
Preferably, the initiator is ammonium persulfate or potassium peroxydisulfate.
Preferably, the polyether polyol is polyoxypropyleneglycol or polytetrahydrofuran diol.
Further, polyether polyol is added in the step 2), at the uniform velocity stirs 1-4h under the conditions of 50-80 DEG C.
The present invention is generated compared with the existing technology to be had the beneficial effect that.
1) preparation method of the invention by by acrylamide and unsaturated acetic anhydride, unitary unsaturation end hydroxy polyether into
Row, which is copolymerized, is made suspension stabilizer, then is used for preparing the synthesis of alkali-free liquid accelerator, by introducing high-molecular copolymer
Accelerator is optimized, the coherency of liquid accelerator is improved, effectively inhibits the generation of precipitating, mother liquor is improved and deposits
The stability of storage, stability can reach 1 year or more.
2) alkali-free liquid accelerator prepared by the present invention not containing sulfate, chloride ion, alkali, therefore the resistance to of concrete can be promoted
Long property.
3) preparation method method of the present invention is by modified by alkanolamine, and with gleditsia sinensis ethanol extract be employed together in
In the synthesis of alkali-free liquid accelerator, the early strength and later strength of concrete can be improved.
4) the gleditsia sinensis ethanol extract that preparation method of the present invention introduces can not only improve the conversion ratio of copolyreaction, moreover it is possible to
The initial set of effective control alkali-free liquid accelerator and final setting time.
5) alkali-free liquid accelerator prepared by the present invention can adapt to various cement, meet the requirements cement setting time,
It can be widely applied in the construction of gunite concrete.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, in conjunction with reality
Example is applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this
Invention, is not intended to limit the present invention.Below with reference to the embodiment technical solution that the present invention will be described in detail, but protection scope not by
This limitation.
Embodiment 1
A kind of preparation method of environmental protection alkali-free liquid accelerator, comprising the following steps:
Weigh raw material: aluminum sulfate 25g, acrylamide 5g, sodium metaphosphate 1g, unsaturated acetic anhydride 5g, unitary unsaturation terminal hydroxy group
Polyethers 4g, alkanolamine 7g, gleditsia sinensis ethanol extract 15g, ammonium persulfate 1g, polyoxypropyleneglycol 1g.
1) by acrylamide aqueous solution, unsaturated acetic anhydride aqueous solution, unitary unsaturation end hydroxy polyether, ammonium persulfate water
Solution mixing is reacted, and reaction temperature is 80 DEG C, time for adding 5h, and gleditsia sinensis ethyl alcohol is added after being added dropwise and extracts
Liquid continues that alkanolamine is added after stirring, and heat preservation 2h obtains mixed reactant；
2) aluminum sulfate aqueous solution and sodium metaphosphate aqueous solution are mixed, keeps the temperature 1h at 60 DEG C, add polypropylene oxide two
Alcohol, at the uniform velocity stirring 4h；Obtain the alkali-free liquid accelerator.
Embodiment 2
A kind of preparation method of environmental protection alkali-free liquid accelerator, comprising the following steps:
Weigh raw material: aluminum sulfate 35g, acrylamide 15g, sodium metaphosphate 5g, unsaturated acetic anhydride 4g, unitary unsaturation terminal hydroxy group
Polyethers 1g, alkanolamine 8g, gleditsia sinensis ethanol extract 5g, potassium peroxydisulfate 5g, polytetrahydrofuran diol 3g.
1) by acrylamide aqueous solution, unsaturated acetic anhydride aqueous solution, unitary unsaturation end hydroxy polyether, potassium peroxydisulfate water
Solution mixing is reacted, and reaction temperature is 60 DEG C, time for adding 6h, and gleditsia sinensis ethyl alcohol is added after being added dropwise and extracts
Liquid continues that alkanolamine is added after stirring, and heat preservation 3h obtains mixed reactant；
2) aluminum sulfate aqueous solution and sodium metaphosphate aqueous solution are mixed, keeps the temperature 2h at 90 DEG C, add polytetrahydrofuran two
Alcohol at the uniform velocity stirs 2h under the conditions of 50 DEG C；Obtain the alkali-free liquid accelerator.
Embodiment 3
A kind of preparation method of environmental protection alkali-free liquid accelerator, comprising the following steps:
Weigh raw material: aluminum sulfate 30g, acrylamide 20g, sodium metaphosphate 4g, unsaturated acetic anhydride 1g, unitary unsaturation terminal hydroxy group
Polyethers 5g, alkanolamine 5g, gleditsia sinensis ethanol extract 20g, ammonium persulfate 3g, polyoxypropyleneglycol 2g.
1) by acrylamide aqueous solution, unsaturated acetic anhydride aqueous solution, unitary unsaturation end hydroxy polyether, ammonium persulfate water
Solution mixing is reacted, and reaction temperature is 70 DEG C, time for adding 1h, and gleditsia sinensis ethyl alcohol is added after being added dropwise and extracts
Liquid continues that alkanolamine is added after stirring, and heat preservation 2.5h obtains mixed reactant；
2) aluminum sulfate aqueous solution and sodium metaphosphate aqueous solution are mixed, keeps the temperature 1.5h at 50 DEG C, adds polypropylene oxide
Glycol, at the uniform velocity stirring 3h；Obtain the alkali-free liquid accelerator.
The above content is combine specific preferred embodiment to the further description done of the present invention, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from the present invention, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by being submitted
Claims determine scope of patent protection.
Claims (7)
1. a kind of environmental protection alkali-free liquid accelerator, which is characterized in that the ingredient including following parts by weight: 25-35 parts of aluminum sulfate, third
5-20 parts of acrylamide, 1-5 parts of sodium metaphosphate, unsaturated acetic anhydride 1-5 parts, 1-5 parts of unitary unsaturation end hydroxy polyether, alkanol
5-8 parts of amine, 5-20 parts of gleditsia sinensis ethanol extract, 1-5 parts of initiator, 1-3 parts of polyether polyol.
2. a kind of environmentally friendly alkali-free liquid accelerator according to claim 1, which is characterized in that the initiator is over cure
Sour ammonium or potassium peroxydisulfate.
3. a kind of environmentally friendly alkali-free liquid accelerator according to claim 1, which is characterized in that the polyether polyol is
Polyoxypropyleneglycol or polytetrahydrofuran diol.
4. a kind of preparation method of environmentally friendly alkali-free liquid accelerator as described in claim 1, which is characterized in that including following step
It is rapid:
1) acrylamide aqueous solution, unsaturated acetic anhydride aqueous solution, unitary unsaturation end hydroxy polyether, initiator solution are mixed
It closes stirring to be reacted, reaction temperature is 60-80 DEG C, time for adding 0.2-6.0h, and gleditsia sinensis ethyl alcohol is added after being added dropwise and mentions
Liquid is taken, continues that alkanolamine is added after stirring, heat preservation 2-3h obtains mixed reactant；
2) aluminum sulfate aqueous solution and sodium metaphosphate aqueous solution are mixed, keeps the temperature 1-2h at 50-90 DEG C, adds polyether polyols
Alcohol, at the uniform velocity stirring 1-4h；Obtain the alkali-free liquid accelerator.
5. a kind of environmentally friendly alkali-free liquid accelerator preparation method according to claim 4, which is characterized in that the initiation
Agent is ammonium persulfate or potassium peroxydisulfate.
6. a kind of environmentally friendly alkali-free liquid accelerator preparation method according to claim 4, which is characterized in that the polyethers
Polyalcohol is polyoxypropyleneglycol or polytetrahydrofuran diol.
7. a kind of environmentally friendly alkali-free liquid accelerator preparation method according to claim 4, which is characterized in that the step
2) polyether polyol is added in, at the uniform velocity stirs 1-4h under the conditions of 50-80 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269794.6A CN108975752A (en) | 2018-10-29 | 2018-10-29 | A kind of environmental protection alkali-free liquid accelerator and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811269794.6A CN108975752A (en) | 2018-10-29 | 2018-10-29 | A kind of environmental protection alkali-free liquid accelerator and preparation method thereof |
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| CN108975752A true CN108975752A (en) | 2018-12-11 |
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| CN201811269794.6A Pending CN108975752A (en) | 2018-10-29 | 2018-10-29 | A kind of environmental protection alkali-free liquid accelerator and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195423A (en) * | 2021-12-21 | 2022-03-18 | 贵州乾鑫丰建材有限公司 | Alkali-free liquid accelerator and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5164315B2 (en) * | 2005-07-22 | 2013-03-21 | 電気化学工業株式会社 | Spraying material and spraying method using the same |
| CN108178548A (en) * | 2017-12-28 | 2018-06-19 | 福建科之杰新材料有限公司 | A kind of preparation method of high-durability alkali-free liquid accelerator |
-
2018
- 2018-10-29 CN CN201811269794.6A patent/CN108975752A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5164315B2 (en) * | 2005-07-22 | 2013-03-21 | 電気化学工業株式会社 | Spraying material and spraying method using the same |
| CN108178548A (en) * | 2017-12-28 | 2018-06-19 | 福建科之杰新材料有限公司 | A kind of preparation method of high-durability alkali-free liquid accelerator |
Non-Patent Citations (4)
| Title |
|---|
| 刘红飞等: "《建筑外加剂》", 28 February 2006, 中国建筑工业出版社 * |
| 姚治邦编著: "《水工建筑材料常用配方及工艺》", 30 June 1989, 河海大学出版社 * |
| 朱效荣编: "《数字量化混凝土实用技术》", 31 May 2016, 中国建材工业出版社 * |
| 蒋林华主编: "《混凝土材料学》", 31 August 2006, 河海大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195423A (en) * | 2021-12-21 | 2022-03-18 | 贵州乾鑫丰建材有限公司 | Alkali-free liquid accelerator and preparation method and application thereof |
| CN114195423B (en) * | 2021-12-21 | 2022-12-30 | 贵州乾鑫丰建材有限公司 | Alkali-free liquid accelerator and preparation method and application thereof |
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Application publication date: 20181211 |