CN106082766A - A kind of water conservation for wet shotcreting viscosifies additive - Google Patents
A kind of water conservation for wet shotcreting viscosifies additive Download PDFInfo
- Publication number
- CN106082766A CN106082766A CN201610375548.3A CN201610375548A CN106082766A CN 106082766 A CN106082766 A CN 106082766A CN 201610375548 A CN201610375548 A CN 201610375548A CN 106082766 A CN106082766 A CN 106082766A
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- China
- Prior art keywords
- additive
- weight
- water conservation
- wet shotcreting
- viscosifies
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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
- C04B2103/44—Thickening, gelling or viscosity increasing agents
-
- 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
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
Abstract
The present invention relates to a kind of water conservation for wet shotcreting and viscosify additive, the following component including by weight: sodium polyacrylate: 35 45 parts；Organic polymer binding agent；45 55 parts；Polyvinyl alcohol: 5 12 parts.By adding viscosifier, owing to it has good caking property and a water-retaining property, on the one hand can reduce the rebound degree of wet shotcreting so that jet quality is more stable, it is to avoid the waste of material；On the other hand, dispersibility and the mobility of concrete slurry can be improved, and then improve the uniformity of wet shotcreting, reduce porosity, finally improve the mechanical property of wet shotcreting.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of water conservation for wet shotcreting and viscosify additive.
Background technology
Concrete-spraying technology is widely used in the surrounding rock supporting of Geotechnical Engineering and underground engineering, in practice it has proved that, injection
Concrete is compared with cast-in-place concrete, and easy construction is easy, saves formwork, cast and form removal operation, makes concrete conveyance, cast
It is combined into one procedure with tamping, saves manpower, shorten the duration, it is also possible to by conveying flexible pipe in high room or narrow and small working area
Between thin-wall construction construction.At present, concrete ejection technology is widely used to metallurgy, coal, water conservancy and various underground engineering
Chamber, the supporting in tunnel.
Concrete-spraying technology develops into tide spray and wet shot from dry spray.For dry spray and tide spray, due to spray during construction
The rebound degree penetrating concrete is high, falls to starching phenomenon seriously, and construction quality can not get ensureing；And dust concentration is big, it is harmful to construction
Personnel's is healthy, and therefore dry spray and tide spraying construction are the most gradually replaced by wet-spray technique.
In carrying out wet shotcreting construction, it is necessary to by concrete admixture, concrete just can be made firmly to attach and to execute
The Worker's Stadium surface.Existing technology is typically all and adds liquid accelerator at shower nozzle, but current on the market, although concrete speed
The kind of solidifying agent is more, but can be actually rare for the accelerator of wet shotcreting generation better effects, if often mixed
The ratio of mud of solidifying soil is excessive, then concrete easily isolates and viscosity is little, and jet thickness is less even cannot wall built-up；If it is mixed
The ratio of mud of solidifying soil is too small, then mixing property of concrete difference and poor fluidity, easy plugging, causes waste of material, and concrete spray
Penetrate quality unstable.How to configure can water conservation, make concrete flowability good, can possess again corresponding adhesion strength, make spray
Penetrate concrete springback rate low, be that present Wet Shotcrete Technology is badly in need of solving the technical problem that.
Theoretically, existing wet shot liquid accelerator solve only concrete fast setting and quickly improves intensity
Problem, does not possess increase water conservation and the effect of adhesion strength.Therefore, the problems referred to above to be improved, necessary research and development one both had
There is water retention, there is again the concrete admixture of Efficient Adhesive Promotion, solve problem present in existing wet shotcreting.
But, the Efficient Adhesive Promotion of common concrete viscosity increaser is general, it is impossible to meet wet shotcreting to high-moisture-retention and
The double requirements of high viscosity.And, concrete is in course of injection, due to the action of gravity of himself, often causes coagulation
Soil is uneven and porosity is higher, has a strong impact on the mechanical property after concrete hardening, and common viscosifier are to improving coagulation
The effect of soil mechanics performance is the most notable.
Summary of the invention
It is an object of the invention to as overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of water conservation for wet shotcreting increases
Viscous additive.
In order to reach above-mentioned purpose, the present invention adopts the following technical scheme that
A kind of water conservation for wet shotcreting viscosifies additive, the following component including by weight:
Sodium polyacrylate: 35-45 part；
Organic polymer binding agent；45-55 part；
Polyvinyl alcohol: 5-12 part.
Owing to the ionic phenomenon of sodium polyacrylate intramolecular many anionic groups makes strand increase, viscosity increases, shape
Becoming high-viscous solution, it can form gel after being dissolved in water.The not imbibition of the viscosity of sodium polyacrylate produces, and therefore gathers
The addition of sodium acrylate can't affect water-retaining property and the mobility of wet shotcreting, is significantly improving concrete slurry viscosity
Meanwhile, relatively low concrete springback rate can still be kept.
Being found through experiments, the polyvinyl alcohol under this proportioning can play good Water-saving effect.
Further, described organic polymer binding agent includes hydroxypropyl methyl cellulose, xanthan gum or sodium alginate.
Preferably, described organic polymer binding agent is hydroxypropyl methyl cellulose.During viscosity test, have passed through several
The cooperation experiment of different components, after finding jointly to coordinate sodium polyacrylate and hydroxypropyl methyl cellulose both components, its
Viscosity can reach synergistic effect, can improve the viscosity of concrete to greatest extent.Additionally, add hydroxypropyl in concrete slurry
After ylmethyl cellulose and polyvinyl alcohol, aggregate particle can well be bonded, and then connects in micelle shape.
Bleeding and isolation when this can reduce concrete setting manifest, make concrete curing after more homogenizing, improve the power of concrete
Learn performance.
Further, a kind of water conservation for wet shotcreting viscosifies additive, also includes the carbonic acid of the part of 1-4 by weight
Sodium, sodium carbonate can increase elasticity and the ductility of concrete slurry, in addition with the pumping of beneficially concrete slurry and minimizing resilience.
Further, a kind of water conservation for wet shotcreting viscosifies additive, also includes the carbonic acid of the part of 1-2 by weight
Calcium, reduces calcium content and can obtain softer gel, increases calcium content and can obtain harder gel.The calcium of excess is likely led
Cause local response is too fast, results in discontinuous gel or precipitation.Increase above-mentioned appropriate calcium, will not produce discontinuous gel or
The situation of precipitation, and slurry viscosity can be increased, and ultimately facilitate the concrete strength after increasing scleroma solidification.
During use, the weight of described viscosifier accounts for the 2%-6% of cement weight in concrete.
Further, a kind of water conservation for wet shotcreting viscosifies additive, also includes the part of 60-200 by weight
Silica flour.Concrete is in course of injection, due to jet impact force and the action of gravity of himself, often causes concrete uneven
Even porosity is higher, has a strong impact on the mechanical property after concrete hardening.On the one hand this need by increasing the viscous of concrete
Property improved, on the other hand, by adding silica flour in viscosifier, can ensure while concrete viscosity, increase mixed
The later strength of solidifying soil, improves impervious and durability, and then the mechanical property of high concrete.
During use, the weight of described viscosifier accounts for the 6%-10% of cement weight in concrete.
The invention has the beneficial effects as follows:
By adding viscosifier, owing to it has good caking property and water-retaining property, on the one hand wet shot coagulation can be reduced
The rebound degree of soil so that jet quality is more stable, it is to avoid the waste of material；On the other hand, concrete slurry can be improved
Dispersibility and mobility, and then improve the uniformity of wet shotcreting, reduce porosity, finally improve the power of wet shotcreting
Learn performance.
Viscosifier in use, are added directly in cement grout and stir together, and construction is simple, easy to operate, and
Will not cause with workmen and directly contact, it is ensured that workmen's is healthy and safe.
When viscosifier are applied to job site, one time spray-up thickness can reach 10cm, within rebound degree is reduced to 5%, and
And with low cost, there is market prospect widely.
Detailed description of the invention
The present invention is described in detail below.
Embodiment 1:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 35 parts, hydroxypropyl methyl cellulose 55 parts, polyvinyl alcohol 5 parts.When mixing cement serosity, viscosifier are introduced directly into water
Slurry liquid stirs together.Viscosifier account in concrete the 5% of cement weight.
Embodiment 2:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 45 parts, hydroxypropyl methyl cellulose 45 parts, polyvinyl alcohol 12 parts.When mixing cement serosity, viscosifier are introduced directly into water
Slurry liquid stirs together.Viscosifier account in concrete the 2% of cement weight.
Embodiment 3:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 42 parts, hydroxypropyl methyl cellulose 50 parts, polyvinyl alcohol 9 parts, sodium carbonate 4 parts, calcium carbonate 2 parts.At the serosity that mixes cement
Time, viscosifier are introduced directly in cement grout and stir together.Viscosifier account in concrete the 6% of cement weight.
Embodiment 4:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 38 parts, hydroxypropyl methyl cellulose 52 parts, polyvinyl alcohol 8 parts, sodium carbonate 2 parts.When mixing cement serosity, by viscosifier
It is introduced directly in cement grout and stirs together.Viscosifier account in concrete the 4% of cement weight.Viscosifier are at this component
Under formula, effect reaches optimum.
Embodiment 5:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 40 parts, hydroxypropyl methyl cellulose 50 parts, polyvinyl alcohol 7 parts, sodium carbonate 1 part, calcium carbonate 1 part, silica flour 60 parts.In stirring
During cement grout, viscosifier are introduced directly in cement grout and stir together.Viscosifier account for cement weight in concrete
6%.
Embodiment 6:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 45 parts, xanthan gum 50 parts, polyvinyl alcohol 12 parts, sodium carbonate 4 parts, calcium carbonate 1 part, silica flour 200 parts.At the serosity that mixes cement
Time, viscosifier are introduced directly in cement grout and stir together.Viscosifier account in concrete the 10% of cement weight.
Embodiment 7:
A kind of water conservation for wet shotcreting viscosifies additive, is made up of following composition by weight: polyacrylic acid
Sodium: 45 parts, sodium alginate 50 parts, polyvinyl alcohol 12 parts, sodium carbonate 4 parts, calcium carbonate 1 part, silica flour 130 parts.At the slurry that mixes cement
During liquid, viscosifier are introduced directly in cement grout and stir together.Viscosifier account in concrete the 8% of cement weight.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to embodiment will be apparent from for those skilled in the art, as defined herein typically
Principle can realize without departing from the spirit or scope of the present invention in other embodiments, is not described in detail
Part, for prior art, do not repeat at this.Therefore, the present invention is not intended to be limited to these enforcements shown in this article
Example, and it is to fit to the widest scope consistent with principles disclosed herein and feature.
Claims (10)
1. the water conservation thickening additive for wet shotcreting, it is characterised in that include following component by weight: poly-
Sodium acrylate: 35-45 part；Organic polymer binding agent；45-55 part；Polyvinyl alcohol: 5-12 part.
A kind of water conservation for wet shotcreting the most according to claim 1 viscosifies additive, it is characterised in that have described in:
Machine high polymer binder includes hydroxypropyl methyl cellulose, xanthan gum or sodium alginate.
A kind of water conservation for wet shotcreting the most according to claim 1 viscosifies additive, it is characterised in that have described in:
Machine high polymer binder is hydroxypropyl methyl cellulose.
4. viscosify additive according to the arbitrary described a kind of water conservation for wet shotcreting of claim 1-3, it is characterised in that:
Also include the sodium carbonate of the part of 1-4 by weight.
A kind of water conservation for wet shotcreting the most according to claim 4 viscosifies additive, it is characterised in that: also include
The calcium carbonate of the part of 1-2 by weight.
A kind of water conservation for wet shotcreting the most according to claim 1 viscosifies additive, it is characterised in that: also include
The calcium carbonate of the part of 1-2 by weight.
7. viscosify additive, its feature according to the arbitrary described a kind of water conservation for wet shotcreting of claim 1,2,3 or 6
It is: the weight of described viscosifier accounts for the 2%-6% of cement weight in concrete.
A kind of water conservation for wet shotcreting the most according to claim 4 viscosifies additive, it is characterised in that: described increasing
The weight of stick accounts for the 2%-6% of cement weight in concrete.
A kind of water conservation for wet shotcreting the most according to claim 1 viscosifies additive, it is characterised in that: also include
The silica flour of the part of 60-200 by weight.
A kind of water conservation for wet shotcreting the most according to claim 9 viscosifies additive, it is characterised in that: described
The weight of viscosifier accounts for the 6%-10% of cement weight in concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610375548.3A CN106082766B (en) | 2016-05-31 | 2016-05-31 | A kind of water conservation thickening additive for wet shotcreting |
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|---|---|---|---|
| CN201610375548.3A CN106082766B (en) | 2016-05-31 | 2016-05-31 | A kind of water conservation thickening additive for wet shotcreting |
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| Publication Number | Publication Date |
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| CN106082766A true CN106082766A (en) | 2016-11-09 |
| CN106082766B CN106082766B (en) | 2019-01-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108821683A (en) * | 2018-07-09 | 2018-11-16 | 中国科学院武汉岩土力学研究所 | A kind of tunnel wet shot high-performance concrete material |
| CN109293277A (en) * | 2018-12-05 | 2019-02-01 | 湖南圣华节水科技股份有限公司 | A kind of degradable curing compound and its methods for making and using same |
| CN109694231A (en) * | 2019-02-22 | 2019-04-30 | 山东创能机械科技有限公司 | A kind of phosphorus magnesia-based cements gunite material and its preparation method and application |
| CN112125570A (en) * | 2020-08-28 | 2020-12-25 | 赵源 | Admixture for shotcrete and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101234864A (en) * | 2008-02-28 | 2008-08-06 | 赵鲁波 | Building plastering mortar additive |
| CN102659445A (en) * | 2012-05-30 | 2012-09-12 | 湖北大学 | Foaming agent for preparation of Water-retaining foam concrete |
-
2016
- 2016-05-31 CN CN201610375548.3A patent/CN106082766B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101234864A (en) * | 2008-02-28 | 2008-08-06 | 赵鲁波 | Building plastering mortar additive |
| CN102659445A (en) * | 2012-05-30 | 2012-09-12 | 湖北大学 | Foaming agent for preparation of Water-retaining foam concrete |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108821683A (en) * | 2018-07-09 | 2018-11-16 | 中国科学院武汉岩土力学研究所 | A kind of tunnel wet shot high-performance concrete material |
| CN109293277A (en) * | 2018-12-05 | 2019-02-01 | 湖南圣华节水科技股份有限公司 | A kind of degradable curing compound and its methods for making and using same |
| CN109293277B (en) * | 2018-12-05 | 2021-10-22 | 湖南圣华节水科技股份有限公司 | Degradable concrete curing agent and preparation and application methods thereof |
| CN109694231A (en) * | 2019-02-22 | 2019-04-30 | 山东创能机械科技有限公司 | A kind of phosphorus magnesia-based cements gunite material and its preparation method and application |
| CN109694231B (en) * | 2019-02-22 | 2021-11-05 | 山东创能机械科技有限公司 | Phosphorus-magnesium-based cement guniting material and preparation method and application thereof |
| CN112125570A (en) * | 2020-08-28 | 2020-12-25 | 赵源 | Admixture for shotcrete and preparation method and application thereof |
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| Publication number | Publication date |
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| CN106082766B (en) | 2019-01-25 |
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