KR20160131348A - Pc pc polycarboxylate copolymer based admixture for performance enhancement of concrete - Google Patents
Pc pc polycarboxylate copolymer based admixture for performance enhancement of concrete Download PDFInfo
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- KR20160131348A KR20160131348A KR1020150063551A KR20150063551A KR20160131348A KR 20160131348 A KR20160131348 A KR 20160131348A KR 1020150063551 A KR1020150063551 A KR 1020150063551A KR 20150063551 A KR20150063551 A KR 20150063551A KR 20160131348 A KR20160131348 A KR 20160131348A
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- admixture
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- concrete
- organic amine
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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
- 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
-
- 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
- C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
- C04B24/121—Amines, polyamines
-
- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
Abstract
Description
The present invention relates to a Co-polymer-based polycarboxylate (PC) admixture, a process for producing the PC admixture, and a concrete composition comprising the admixture.
Conventional lignin- or naphthalene-based water-reducing admixtures have been used extensively in ready mixed concrete mixes. However, due to the chemical components and byproducts, there are many disadvantages to the concrete already mixed with the material.
In other words, the components of the lignin-based water-reducing admixture were limited and it took a considerable amount of time to perform. It is also sensitive to the gypsum used in cement production. More importantly, the quality of products with lignin components is getting worse and, in the end, it also causes difficulties in quality control of the admixture.
In addition, naphthalene-based high performance water reducing agents, even though they have good water reduc- ing performance, are also subject to slump loss control, low capacity cost efficiency, tendency to bleeding and material segregation at high slump, sensitivity to changes in moisture control, Shrinkage, etc., remain a common problem in the use of the admixture.
In the mid-1990s, the next generation of co-polymer PC-admixture appeared in the concrete market, despite the first patent on this type of polymer being issued in the 1980s.
Copolymer (PC) based PC admixtures have completely different chemical composition when compared to the conventionally used lignin / naphthalene. They generally have a basic PC component with the propensity of the attached polyoxyalkylene (poly-oxyalkylene).
In contrast to the decentralized mechanism of the general water reducing admixture that can be explained in terms of electrostatic repulsion between the cement molecules negatively charged on the cement surface due to the absorption of polymer molecules of anions and measured due to the scale of the zeta potential, The electrostatic repulsion of the admixture is only one-third of the measured value of the existing admixture.
The dispersion effect is generally due to the very strong particle interference effect due to the physical space occupation due to the push effect that causes the cement particles to fall off. In addition, its strong dispersing ability and next generation PC admixture can provide significant performance advantages over existing water reducing agents and high performance water reducing agents, and have technical advantages.
The ability to control the workability of the concrete within a wide slump range, the ability to maintain concrete workability during the expansion cycle without minimal delays, the low bleeding and material separation tendency at high workability, the better concrete Low drying shrinkage for stability, close linear dose response for more predictable performance, and improved finishability for better surface finish.
Copolymer-based PC admixtures are designed to meet the specific needs of different application areas in terms of molecular structure design, in terms of performance, the length and density (concentration) of main chains and side chains, the ratio of EO / PO , The density of the side chain, the transplantation of chemical functional groups, and so on.
SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is, therefore, an object of the present invention to provide a cement replenishing material and a lignosulfonate lignosulphonate) or naphthalene-based admixtures, it provides relatively high water reduction and high strength at the same water cement ratio and, due to better and equal dispersing ability, more cement material for cement replacement to obtain the same concrete strength Based PC admixture, a method for producing the PC admixture, and a concrete composition containing the admixture.
Further, according to one embodiment of the present invention, with the same dispersion of the more cement molecules and the lower water cement ratio, the microfilling effect becomes clearer, which is due to the fact that the additive cement materials A PC admixture, a method for producing the PC admixture, and a concrete composition containing the admixture.
According to one embodiment of the present invention, a copolymer-based PC admixture that can be used in a wide variety of concrete applications within a slump range of 100 to 250 mm and 10 to 80 strength (Mpa) A method for producing a PC admixture, and a concrete composition containing the admixture.
The admixture according to an embodiment of the present invention is less cloying than conventional admixtures and this function improves the workability of the concrete in the field and minimizes the potential risk of concrete quality due to the difficulty of casting. Based PC admixture, a process for producing the PC admixture, and a concrete composition containing the admixture.
In addition, according to one embodiment of the present invention, concrete having a consistent quality can be produced in a concrete factory, and since it is formed of a synthetic copolymer PC raw material, it contains far fewer impurities than conventional admixtures , A PC-based PC admixture which can easily correspond to other materials of concrete and is less sensitive to various parameters in concrete formulation, a process for producing the PC admixture, and a concrete composition containing the admixture.
According to one embodiment of the present invention, a copolymer-based PC admixture which is less sensitive to cement chemistry than a conventional admixture and capable of exhibiting stronger performance in the field, a method for producing the PC admixture, The present invention also provides a concrete composition comprising
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.
A first object of the present invention is to provide a concrete admixture for concrete comprising: a copolymer; Organic amine based constituents; And an inorganic compound. ≪ Desc / Clms Page number 5 >
In addition, the organic amine-based constitution may be characterized by being composed of at least one of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) and DEG (Diethylene).
The inorganic compound may be composed of at least one of calcium nitrite and sodium gluconate.
A second object of the present invention is to provide an admixture for concrete comprising 17 to 26% by weight of a copolymer; 1 to 10% by weight of an organic amine-based constituent; 10 to 15% by weight of an inorganic compound; And the balance% by weight of water.
A third object of the present invention is to provide a concrete admixture for concrete, which comprises a standard type copolymer; Slump retentive copolymer; And an initial strength type copolymer. ≪ Desc / Clms Page number 7 >
It may further comprise an organic amine-based constituent.
And. And further contains an inorganic compound.
In addition, the standard copolymer may be characterized in that it provides a dispersing effect due to steric repulsive force which enables uniformity of the material.
The slump retentive copolymer may be characterized by delaying the hydrolysis in the alkaline environment of the cement paste to maintain the dispersing effect.
In addition, the functional group early strength type copolymer may be characterized by stepwise expanding the hydration action of CSA and C3S in the cement to control coagulation and promote initial strength development.
A fourth object of the present invention is to provide a concrete admixture for concrete comprising 3 to 4% by weight of a standard copolymer; 1 to 2% by weight of a slump retentive copolymer; 13 to 20% by weight of an initial strength type copolymer; And the balance% by weight of water.
Further, it may further comprise 1 to 10% by weight of an organic amine-based resin.
Further, it may further comprise 10 to 15% by weight of an inorganic compound.
The fifth object of the present invention can be achieved as a concrete composition, characterized in that it comprises the admixture according to the above-mentioned first to fourth objects in the concrete composition.
A sixth object of the present invention is to provide a method for producing an admixture for concrete, which comprises mixing 3 to 4% by weight of a standard type copolymer, 1 to 2% by weight of a slump retention type copolymer and 13 to 20% Mixing the mixture to prepare a copolymer mixture; And mixing the copolymer mixture with water in an amount of 1 to 10% by weight based on the organic amine, 10 to 15% by weight of the inorganic compound, and the remaining weight% in water. .
According to one embodiment of the present invention, a cementitious material and a cementitious material having a relatively high cement content at the same water cement ratio, as compared to a low cement content or a higher cement replacement lignosulphonate or naphthalene-based admixture, It provides moisture reduction and high strength, and because of its better and more uniform dispersing ability, it has the effect of using more added cement material for replacing cement to obtain the same concrete strength.
Further, according to one embodiment of the present invention, with the same dispersion of the more cement molecules and the lower water cement ratio, the microfilling effect becomes more clear, which has the effect that the added cement materials can contribute to the initial strength expression .
According to one embodiment of the present invention, due to the more diverse formulation design, there is an advantage that it can be used in a wide variety of concrete applications within a slump range of 100 to 250 mm and a strength of 10 to 80 mPa.
The admixture according to an embodiment of the present invention is less cloying than conventional admixtures and this function enhances the workability of the concrete in the field and minimizes the potential risk of the concrete quality due to the difficulty of casting .
In addition, according to one embodiment of the present invention, concrete having a consistent quality can be produced in a concrete factory, and since it is formed of a synthetic copolymer PC raw material, it contains far fewer impurities than conventional admixtures , It can easily correspond with other materials of concrete, and has the advantage of being less sensitive to various parameters in concrete formulation.
According to one embodiment of the present invention, the steric repulsion force is less sensitive to cement chemical components than conventional admixtures and has the effect of exerting more powerful performance in the field.
It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.
In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.
Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the etched area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.
The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.
In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.
Hereinafter, the structure and function of the copolymer-based PC admixture according to one embodiment of the present invention will be described. The copolymer-based PC admixture according to one embodiment of the present invention is a next-generation copolymer (Co-polmer) -based modifier admixture. The copolymer-based PC admixture according to one embodiment of the present invention comprises organic amines and inorganic compounds, as described later.
The copolymer-based PC admixture according to one embodiment of the present invention exerts an excellent slump retention performance and a strength of 10 to 80 MPa in a slump range of 10 to 25 cm especially for concrete containing F / A or S / P and an alternative cement material Which can be used for concrete.
The copolymer-based PC admixture according to one embodiment of the present invention is a ready-to-use liquid admixture having excellent cement dispersing function and enables production of high quality, high-performance ready-mixed concrete.
The copolymer-based PC admixture according to an embodiment of the present invention comprises a copolymer, an organic amine-based composition, and an inorganic compound.
Such an organic amine-based constituent may be composed of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) or DEG (Diethylene).
The inorganic compound may be composed of calcium nitrite or sodium gluconate.
Also, in the copolymer-based PC admixture according to an embodiment of the present invention, 17 to 26 wt% of the copolymer, 1 to 10 wt% of the organic amine compound, 10 to 15 wt% of the inorganic compound, And the like.
Also, the copolymer included in the copolymer-based PC admixture according to an embodiment of the present invention is formed by mixing copolymers having three different functions. That is, the copolymer mixture according to one embodiment of the present invention comprises a standard type copolymer, a slump retention type copolymer and an initial strength type copolymer.
The standard type copolymer according to one embodiment of the present invention provides a dispersing effect due to the steric repulsive force which enables the uniformity of the material.
In addition, the slump retentive copolymer will retard hydrolysis in the alkaline environment of the cement paste to maintain the dispersing effect.
And, the functional group early strength type copolymer gradually enlarges the hydration action of CSA and C3S in cement to control coagulation and promote initial strength development.
More specifically, the standard copolymers provide a strong dispersing effect due to the steric repulsion that allows much more uniformity of material in the dispersion of the cement material and in the concrete mixing. It also allows the concrete formulation to be produced at low moisture content. Due to the strong dispersing effect, a more uniform dispersion effect of the cement particles in the concrete formulation allows the cement particles to have more surface area exposed to water for faster, more uniform hydration.
And, the slump retentive copolymer is slowly dispersed in the high alkaline environment of the cement paste to maintain a sustained sufficient dispersion effect to ensure excellent slump retention and thiotropical behavior within a wide range of slump over time Disassemble.
In addition, the functional early strength type copolymers provide a more dispersive effect, helping to step-widen the hydration of CSA and C3S in cement to control coagulation and promote initial strength development. In addition to the early strength type copolymers, small amounts of organic amines and inorganic compounds accelerate the initial hydration of C3A and C3S.
The copolymer-based PC admixture according to one embodiment of the present invention, which has a unique combination of these three types of copolymers, can be used in a wide range of applications such as an excellent mix of concrete, an improved F / A Or S / P powder, can have low cement content or high cement substitution.
The reduced water cement ratio can also improve the microfilling effect of the added cement material and help the added cement materials contribute to the early strength development. Additional pozzolanic reactions will ensure the later strength development of the concrete formulation, including many additive cement materials.
Also, the copolymer-based PC admixture according to an embodiment of the present invention may contain 3 to 4% by weight of the standard copolymer, 1 to 2% by weight of the slump-retaining copolymer, 13 to 20% by weight of the initial strength copolymer, 1 to 10% by weight based on the organic amine, 10 to 15% by weight of the inorganic compound, and the balance of water by weight.
The method of preparing an admixture according to an embodiment of the present invention comprises mixing 3 to 4% by weight of a standard type copolymer, 1 to 2% by weight of a slump retention type copolymer, and 13 to 20% by weight of an initial strength type copolymer, To prepare a copolymer mixture. The copolymer mixture is prepared by mixing 1 to 10% by weight of an organic amine based compound, 10 to 15% by weight of an inorganic compound and the remaining weight% by weight of water.
As mentioned above, the organic amine-based constituent may be composed of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) or DEG (Diethylene).
The organic amine-based constituent may be composed of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) or DEG (Diethylene).
Low Cement Content or Higher Cement Replacement by Controlling Cement Filler and Coagulation Time Compared to typical lignosulphonate or naphthalene based admixtures, the copolymer-based PC admixture according to one embodiment of the present invention has the same water It provides relatively high moisture reduction and high strength in the cement ratio, and because of its better and more uniform dispersing ability, it makes it possible to use more added cement material to replace the cement to obtain the same concrete strength.
This is because much more powerful steric repulsion dominates the dispersion mechanism of the PC admixture, which is different from the mechanism of electrostatic repulsion of conventional admixtures.
With the same dispersion of the more cement molecules and the lower water cement ratio, the microfilling effect becomes more clear, which makes it possible for the additive cement materials to contribute to the initial strength development.
In addition, the copolymer-based PC admixture according to one embodiment of the present invention has excellent slump retention performance. That is, the copolymer-based PC admixture according to one embodiment of the present invention provides excellent slump retention in a wide range of slumps where conventional admixtures did not show effective performance without added coagulation time.
Unlike lignin or naphthalene-based admixtures that have been used in ready-made concrete consisting of retarding components that help to maintain slump retention by increased coagulation time, the copolymer-based PC according to one embodiment of the present invention The admixture does not contain an inhibiting element.
The slump retention performance of the copolymer-based PC admixture according to one embodiment of the present invention is controlled by one type of copolymer structure, which can be hydrolyzed in a highly alkaline environment, Cement molecules are slowly released and absorbed to the surface in order to drop them.
Also, the copolymer-based PC admixture according to an embodiment of the present invention can be applied to a wide concrete mix design. That is, the copolymer-based PC admixture according to one embodiment of the present invention can be used in a wide variety of concrete applications within a slump range of 100 to 250 mm, and 10 to 80 strength (Mpa) have.
And, the copolymer-based PC admixture according to one embodiment of the present invention is less glutinous than other common admixtures. This function becomes more apparent in formulations that require a smaller amount of cement and water. This function enhances the workability of the concrete in the field and minimizes the potential risk of concrete quality due to the difficulty of casting.
Also, the copolymer-based PC admixture according to one embodiment of the present invention helps to produce concrete with consistent quality in a concrete factory. Since the present invention is formed from a copolymer PC raw material, it contains far fewer impurities than the conventional admixture from by-products. Thus, the present invention based on a PC. It can be more compatible with other materials in concrete and is less sensitive to various parameters in concrete formulation. In addition, hysteretic repulsion is less sensitive to cement chemistry than conventional admixtures for better quality control and is more robust in the field.
It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .
Claims (19)
Copolymer;
Organic amine based constituents; And
Based copolymer admixture characterized by comprising an inorganic compound.
The organic amine-
Based PC admixture characterized in that it is composed of at least one of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) and DEG (Diethylene).
The above-
Wherein the composition is composed of at least one of calcium nitrate and sodium gluconate.
17 to 26% by weight of a copolymer;
1 to 10% by weight of an organic amine-based constituent;
10 to 15% by weight of an inorganic compound; And
And the remaining weight percent comprises water.
A concrete composition comprising the admixture according to any one of claims 1 to 4.
Standard type copolymers;
Slump retentive copolymer; And
Lt; RTI ID = 0.0 > PC < / RTI > admixture.
Based copolymer admixture further comprising an organic amine based constituent.
Based copolymer admixture further comprising an inorganic compound.
The above-
Based PC admixture characterized by providing a dispersing effect due to steric repulsive force which enables uniformity of the material.
The slump-retaining-type copolymer may contain,
Based PC admixture characterized in that the hydrolysis is delayed in the alkaline environment of the cement paste to maintain the dispersing effect.
The above-mentioned functional group early strength type copolymer comprises
Based PC admixture characterized in that the hydration of CSA and C3S in the cement is progressively widened to control coagulation and promote initial strength development.
A concrete composition comprising the admixture according to any one of claims 5 to 11.
3 to 4% by weight of a standard copolymer;
1 to 2% by weight of a slump retentive copolymer;
13 to 20% by weight of an initial strength type copolymer; And
And the remaining weight percent comprises water.
Based copolymer admixture further comprising 1 to 10% by weight of an organic amine based polymer.
And 10 to 15% by weight of an inorganic compound.
16. A concrete composition comprising an admixture according to any one of claims 13 to 15.
Mixing 3 to 4% by weight of a standard copolymer, 1 to 2% by weight of a slump-retaining copolymer and 13 to 20% by weight of an initial strength copolymer to prepare a copolymer mixture; And
Mixing the copolymer mixture with water in an amount of 1 to 10% by weight based on the organic amine, 10 to 15% by weight of the inorganic compound, and the remainder in% by weight based on the weight of the copolymer.
The organic amine-
Based PC admixture characterized in that it is composed of at least one of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) and DEG (Diethylene).
The organic amine-
Based PC admixture characterized in that it is composed of at least one of DEIPA (Diethanolisopropanolamine), TEA (Triehanolamine) and DEG (Diethylene).
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| KR1020150063551A KR20160131348A (en) | 2015-05-07 | 2015-05-07 | Pc pc polycarboxylate copolymer based admixture for performance enhancement of concrete |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6048393A (en) | 1998-05-26 | 2000-04-11 | W.R. Grace & Co. -Conn. | Processing additives for hydraulic cements |
| JP3423853B2 (en) | 1996-02-22 | 2003-07-07 | 株式会社日本触媒 | Cement admixture and cement composition |
| KR100655561B1 (en) | 2004-04-23 | 2006-12-08 | 한국산노프코 주식회사 | Plasticizer for cement |
| KR100668942B1 (en) | 2004-12-03 | 2007-01-12 | 주식회사 엘지화학 | Cement admixture and method for preparing the same |
| JP2014040359A (en) | 2012-08-24 | 2014-03-06 | Nippon Paper Industries Co Ltd | Cement admixture and cement composition using the same |
-
2015
- 2015-05-07 KR KR1020150063551A patent/KR20160131348A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3423853B2 (en) | 1996-02-22 | 2003-07-07 | 株式会社日本触媒 | Cement admixture and cement composition |
| US6048393A (en) | 1998-05-26 | 2000-04-11 | W.R. Grace & Co. -Conn. | Processing additives for hydraulic cements |
| KR100655561B1 (en) | 2004-04-23 | 2006-12-08 | 한국산노프코 주식회사 | Plasticizer for cement |
| KR100668942B1 (en) | 2004-12-03 | 2007-01-12 | 주식회사 엘지화학 | Cement admixture and method for preparing the same |
| JP2014040359A (en) | 2012-08-24 | 2014-03-06 | Nippon Paper Industries Co Ltd | Cement admixture and cement composition using the same |
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