CN107417159A - A kind of viscosity-controlling agent for premixing high-strength concrete - Google Patents
A kind of viscosity-controlling agent for premixing high-strength concrete Download PDFInfo
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- CN107417159A CN107417159A CN201710751653.7A CN201710751653A CN107417159A CN 107417159 A CN107417159 A CN 107417159A CN 201710751653 A CN201710751653 A CN 201710751653A CN 107417159 A CN107417159 A CN 107417159A
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- viscosity
- concrete
- controlling agent
- strength concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- 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 construction material to produce and process technical field, is related to a kind of concrete admixture, more particularly to a kind of viscosity-controlling agent for being used for high-strength concrete, can reducing concrete viscosity.The viscosity-controlling agent, include the raw material of following mass fraction：Sodium alginate：0.1%~2.0%；Welan gum：0.2%~3.0%；Xanthans：0.1%~3.0%；Nertralizer：0.1%~1.0%；Water：91.0%~99.5%.Using this viscosity-controlling agent, the viscosity of high-strength concrete mixture can be effectively reduced, there is certain hydrophily, the friction between particle is reduced, increases the mobility of slurry, there is certain thickening property and suspension stability, increase the stability of high-strength concrete.
Description
Technical field
The invention belongs to construction material to produce and process technical field, is related to a kind of concrete admixture, more particularly to a kind of
For high-strength concrete, the viscosity-controlling agent of concrete viscosity can be reduced.
Background technology
The concrete that strength grade is C60~C100 is typically called high-strength concrete by China.High-strength concrete is as one
Kind new construction material, with the performance advantage such as its compression strength is high, ability of anti-deformation is strong, density is big, porosity is low, built in high level
It is widely used in building structure, long-span bridge girder construction and some unique constructions, especially compression strength, it is generally general
Logical mixed doubt soil 4~6 times of intensity, can effectively reduce the section of component, be particularly suitable for being used for skyscraper.However, due to high-strength
Concrete gel rubber material materials are more, and water-cement ratio is relatively low, and causing concrete easily to occur, slurry viscosity is excessive, coarse aggregate sinks
The situations such as drop, the hardened, pumping difficulties of concrete, have a strong impact on the workability of concrete.
From the point of view of rheology angle, fresh concrete is that one kind between elastomer, plastic body and viscous liquid is high
Dense suspension system material, therefore, the rheological property of fresh concrete are the important indicators for characterizing workability of concrete.Influence is newly mixed
The factor of concrete viscosity mainly has the slurry of the viscosity of mortar slurry and coarse aggregate particle surface thickness more than needed in concrete；Its
In, the average water film thickness of the viscosity of slurry mainly between by binder materials is influenceed, and the slurry of coarse aggregate particle surface is had more than needed
Thickness is mainly relevant with stability with the encapsulation of slurry.Because the ratio of mud of existing high-strength concrete is relatively low, cause the material that is gelled
Expect that the water film thickness between particle is reduced so that the friction increase between binder materials, and then cause the viscosity of slurry to increase, flow
Dynamic property is deteriorated, and slurry is also deteriorated the encapsulation and stability on coarse aggregate surface therewith.Therefore, high-strength concrete needs to reduce
The viscosity of concrete mix, improve workability of concrete and pump-conveying property.
Packing density is improved by optimizing gelling material particles grading in patent CN103145360A, and then is increased
The water film thickness of gelling system particle surface；Improve water reducer adsorption efficiency and reduce water reducer dosage, result in coagulation
Aqueous Solution Viscosity reduces in soil；And pattern effect and surface charge effect due to powder granule, reduce between particle mutually
Active force, thus reduce concrete viscosity and concrete strength is not made a difference.But the invention is to former material used
Material requires higher, and raw material quality is uneven in actual production, difference is very big, may cause reduce in practice of construction
The viscosity of concrete.Therefore, it is necessary to a kind of high-strength concrete independent of binder materials reduced with viscosity-controlling agent it is high-strength
The viscosity of concrete mix, improve its workability.
The content of the invention
It is an object of the invention to provide a kind of viscosity-controlling agent for high-strength concrete, by being added in concrete
Hydrophilic colloid is the viscosity improver of main component, reduces the viscosity of high-strength concrete mixture, improves its workability.
A kind of viscosity-controlling agent for high-strength concrete, include the raw material of following mass fraction：
Sodium alginate：0.1%~2.0%；
Welan gum：0.2%~3.0%；
Xanthans：0.1%~3.0%；
Nertralizer：0.1%~1.0%；
Water：91.0%~99.5%.
Preferably, the viscosity-controlling agent, the raw material of following mass fraction is included：
Sodium alginate：0.2%~1.5%；
Welan gum：0.5%~2.1%；
Xanthans：0.3%~2.5%；
Nertralizer：0.2%~0.5%；
Water：94.4%~98.3%.
Wherein, nertralizer is sodium hydroxide or potassium hydroxide.
Nertralizer is used to adjust solution ph, increases the stability of viscosity-controlling agent.
Wherein, sodium alginate is the high glycan aldehydic acid that is formed with glycosidic bond of aldehyde radical of beta-D-mannuronic acid, is a kind of high viscous
Property, hydrophilic macromolecular compounds, have stronger hydrability.Welan gum is also known as welan gum, is to utilize bioengineering fermentation system
The biological polyoses taken；Welan gum solution is a kind of typical pseudoplastic fluid, can keep solution under standing or medium shear
The cohesiveness of system；At high shear rates, viscosity reduces rapidly；And when shear rate releases, the viscosity of solution recovers again
To maximum.Xanthans is fermented and caused extracellular microbial polysaccharide through Xanthomonas campestris by carbohydrate, to insoluble solid and oil
Drop has good suspension effect, has excellent emulsion stability and suspending power.
A kind of viscosity-controlling agent for high-strength concrete, its application method are to weigh above-mentioned raw materials and mix equal
It is even；In use, the dosage of the viscosity-controlling agent be high-strength concrete in binder materials gross weight 0.1%~
1.5%, it is preferred that be 0.5%~1.0% of binder materials gross weight in high-strength concrete.
It is used for having the beneficial effect that for high-strength concrete viscosity-controlling agent using the present invention, can effectively reduces high-strength concrete and mix
The viscosity of compound；With certain hydrophily, thicker colloidal moisture film is formed between binder materials, is reduced between particle
Friction, increase the mobility of slurry；With certain thickening property and suspension stability, enable slurry is uniform and stable to be wrapped in
Around coarse aggregate, the slurry for being effectively increased coarse aggregate surface is had more than needed, and reduces its viscosity；Increase the stabilization of whole high-strength concrete
Property, coarse aggregate is effectively avoided to sink to the bottom, phenomena such as concrete is hardened, pumping difficulties.
Embodiment
A kind of viscosity-controlling agent for high-strength concrete, it is mixed evenly, is configured to according to the mass fraction of following table
Viscosity-controlling agent：
The viscosity-controlling agent prepared according to upper table, is mixed with concrete respectively, with reference to CECS203-2006《Self-compaction coagulation
Native application technology code》, time speed of the concrete by V-type funnel is determined, judges the viscosity of concrete.
The match ratio of concrete used is as shown in the table：
The concrete performance measured is as shown in the table：
As seen from the above table, viscosity-controlling agent of the invention can effectively reduce concrete viscosity, and reduction amplitude is up to
33.3%~39.1%, meanwhile, 3d, 7d, 28d intensity of concrete are not had much affect.
Claims (5)
1. a kind of viscosity-controlling agent for high-strength concrete, it is characterised in that include the raw material of following mass fraction：
Sodium alginate：0.1%~2.0%；
Welan gum：0.2%~3.0%；
Xanthans：0.1%~3.0%；
Nertralizer：0.1%~1.0%；
Water：91.0%~99.5%.
2. a kind of viscosity-controlling agent for high-strength concrete as claimed in claim 1, it is characterised in that including following quality
The raw material of fraction：
Sodium alginate：0.2%~1.5%；
Welan gum：0.5%~2.1%；
Xanthans：0.3%~2.5%；
Nertralizer：0.2%~0.5%；
Water：94.4%~98.3%.
3. a kind of viscosity-controlling agent for high-strength concrete as claimed in claim 1, it is characterised in that the nertralizer is
Sodium hydroxide or potassium hydroxide.
A kind of 4. viscosity-controlling agent for being used for high-strength concrete as any one of claims 1 to 3, it is characterised in that its
Dosage is 0.1%~1.5% of binder materials gross weight in high-strength concrete.
A kind of 5. viscosity-controlling agent for being used for high-strength concrete as any one of claims 1 to 3, it is characterised in that its
Dosage is 0.5%~1.0% of binder materials gross weight in high-strength concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751653.7A CN107417159A (en) | 2017-08-28 | 2017-08-28 | A kind of viscosity-controlling agent for premixing high-strength concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751653.7A CN107417159A (en) | 2017-08-28 | 2017-08-28 | A kind of viscosity-controlling agent for premixing high-strength concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107417159A true CN107417159A (en) | 2017-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710751653.7A Pending CN107417159A (en) | 2017-08-28 | 2017-08-28 | A kind of viscosity-controlling agent for premixing high-strength concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111484269A (en) * | 2019-01-28 | 2020-08-04 | 西南科技大学 | Viscosity regulator for cement-based grouting material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164754A (en) * | 2006-10-18 | 2008-04-23 | 润弘精密工程事业股份有限公司 | Dry stirring light compartment wall grouting material |
| CN107001887A (en) * | 2014-12-24 | 2017-08-01 | 美国石膏公司 | Seam ornamenting adhesive |
-
2017
- 2017-08-28 CN CN201710751653.7A patent/CN107417159A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101164754A (en) * | 2006-10-18 | 2008-04-23 | 润弘精密工程事业股份有限公司 | Dry stirring light compartment wall grouting material |
| CN107001887A (en) * | 2014-12-24 | 2017-08-01 | 美国石膏公司 | Seam ornamenting adhesive |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111484269A (en) * | 2019-01-28 | 2020-08-04 | 西南科技大学 | Viscosity regulator for cement-based grouting material and preparation method thereof |
| CN111484269B (en) * | 2019-01-28 | 2022-11-25 | 西南科技大学 | Viscosity regulator for cement-based grouting material and preparation method thereof |
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