KR20210055280A - Admixture Composition for General Strength High Flowing Concrete - Google Patents

Admixture Composition for General Strength High Flowing Concrete Download PDF

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KR20210055280A
KR20210055280A KR1020190141547A KR20190141547A KR20210055280A KR 20210055280 A KR20210055280 A KR 20210055280A KR 1020190141547 A KR1020190141547 A KR 1020190141547A KR 20190141547 A KR20190141547 A KR 20190141547A KR 20210055280 A KR20210055280 A KR 20210055280A
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concrete
additive
fluidity
composition
admixture composition
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KR102279214B1 (en
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한형섭
이동규
유병현
박찬규
이우진
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동남기업 주식회사
삼성물산 주식회사
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • C04B24/28Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/286Polycarbonates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/041Aluminium silicates other than clay
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/042Magnesium silicates, e.g. talc, sepiolite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B16/00Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B16/02Cellulosic materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • C04B24/28Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/281Polyepoxides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/10Mortars, concrete or artificial stone characterised by specific physical values for the viscosity

Abstract

The present invention relates to an admixture composition for general-strength and high-fluidity concrete containing additives to improve resistance to material separation or the like, mainly based on polycarboxylic acid to secure fluidity. The admixture composition for general-strength and high-fluidity concrete is mainly based on polycarboxylic acid to secure fluidity, and contains additives including polyethylene oxide and magnesium aluminum silicate.

Description

일반강도 고유동성 콘크리트용 혼화제 조성물{Admixture Composition for General Strength High Flowing Concrete} Admixture Composition for General Strength High Flowing Concrete}

본 발명은 저분체 콘크리트에 첨가되어 고유동성이 안정적으로 발현되도록 하면서도 강도저하 없이 재료분리에 대한 저항성, 다양한 원인에 의한 균열저항성을 향상시킬 수 있는 혼화제 조성물에 관한 것이다. The present invention relates to an admixture composition that is added to low-powder concrete to stably exhibit high fluidity while improving resistance to material separation and crack resistance due to various causes without deteriorating strength.

최근 구조물의 고층화 및 대형화 뿐만이 아니라 개성 있는 디자인의 건축물 시공이 증가됨에 따라 부재단면 축소 및 과밀배근으로 인해 콘크리트 채움성이 문제가 되고 있다. 일반적으로 콘크리트의 채움성을 향상시키기 위해서는 콘크리트의 유동성(Slump flow)을 증가시켜야 한다. 하지만, 일반강도 영역에서는 낮은 분체량으로 인해 유동성 증진에 한계가 존재하고, 분체량을 증가시키게 되면 콘크리트 제조원가가 상승하는 문제점이 있다.In recent years, as the construction of buildings with unique designs as well as high-rise and large-sized structures has increased, the concrete filling property has become a problem due to the reduction of member cross-sections and overcrowding. In general, in order to improve the filling property of concrete, it is necessary to increase the slump flow of concrete. However, in the area of general strength, there is a limitation in improving fluidity due to a low amount of powder, and increasing the amount of powder has a problem in that the manufacturing cost of concrete increases.

고유동 콘크리트는 크게 분체계와 증점제계로 구분되는데 분체계는 다량의 결합재의 시용에 의한 정성증대에 기인하여 유동성 및 충전성을 발현한다. 이러한 분체계는 다량의 결합재의 사용에 의해 콘크리트의 유동성을 극대화시켜주는 원리이며 고강도 콘크리트의 영역에 속하는데, SCP용 채움 콘크리트의 필요강도는 35MPa의 콘크리트이므로 분체계의 고유동 콘크리트의 적용은 비효율적이다. High-flow concrete is largely divided into a powder system and a thickener system, and the powder system expresses fluidity and filling properties due to the increase in qualitativeness by the application of a large amount of binder. This splitting system is a principle that maximizes the fluidity of concrete by the use of a large amount of bonding material, and belongs to the area of high strength concrete.Since the required strength of the filled concrete for SCP is 35MPa concrete, the application of the high flow concrete of the splitting system is inefficient. to be.

증점제계 고유동 콘크리트의 경우 증점제에 의한 재료분리 억제에 의해 낮은 분체량을 사용하고도 제조가 가능하여 SCP용 35MPa급 고유동 콘크리트의 제조에 적합하다. 하지만 증점제계 고유동 콘크리트는 점성의 증대로 인한 콘크리트의 작업성 및 유동성 증대에 많은 어려움이 있으며, 증점제를 고성능 감수제와 별도로 투입해야 하는 하므로 생산시설의 보완 및 추가 투자가 이루어져야 하여 원가상승의 문제점이 대두되고 있다.In the case of thickener-based high-flow concrete, it is suitable for the production of 35MPa-class high-flow concrete for SCP as it can be manufactured even with a low powder weight by suppressing material separation by the thickener. However, the thickener-based high-flow concrete has a lot of difficulty in increasing the workability and fluidity of the concrete due to the increase in viscosity, and since the thickener must be added separately from the high-performance water reducing agent, the production facility must be supplemented and additional investments must be made, resulting in a cost increase It is on the rise.

일 예로 대한민국 특허등록 제0888534호에서는 중량백분율로서 시멘트 조성물 20~25%, 물 5~10%, 골재 65~74.9% 및 고유동화제, 공기연행제, 점증제를 포함하For example, in Korean Patent Registration No. 0888534, as a weight percentage, 20 to 25% of cement composition, 5 to 10% of water, 65 to 74.9% of aggregate, and a superplasticizer, air entraining agent, and thickener are included.

는 혼화제 0.1~0.5%를 교반하는 과정으로 이루어지며, 상기 시멘트 조성물은 중량백분율로서 시멘트 36~44%, 플라이애시 18~22%, 고로슬래그 분말 27~37% 및 석회석 분말 9~11%를 포함하는 것을 특징으로 하는 고유동성 콘크리트 제조방법을 제시하고 있다.Is made by stirring 0.1 to 0.5% of admixture, and the cement composition contains 36 to 44% of cement, 18 to 22% of fly ash, 27 to 37% of blast furnace slag powder, and 9 to 11% of limestone powder as a weight percentage. It proposes a method of manufacturing high-flow concrete characterized in that it is.

그런데 상기 기술의 경우 고유동화제에 의해 고유동성이 확보될 수 있으나 재료분리에 대한 저항성, 균열에 대한 저항성을 기대할 수 없는 문제가 있으며, 시간경과에 따라 안정적인 유동성의 확보가 담보되지 않아 타설과정 등에서 충진성이 저하되는 문제가 있다. However, in the case of the above technology, high fluidity can be secured by a high fluidizing agent, but there is a problem that resistance to material separation and resistance to cracks cannot be expected. There is a problem that the filling property is deteriorated.

대한민국 특허등록 제0888534호Korean Patent Registration No. 0888534

따라서, 본 발명은 저분체 콘크리트에 첨가되어 안정적인 고유동성이 확보되면서도 재료분리에 대한 저항성, 균열에 대한 저항성이 향상될 수 있는 혼화제를 제공하고자 함이다.Accordingly, the present invention is to provide an admixture capable of improving resistance to material separation and resistance to cracks while securing stable fluidity by being added to low-powder concrete.

상기 목적을 달성하기 위해 본 발명의 일반강도 고유동 콘크리트용 혼화제 조성물(이하 "본 발명의 조성물"이라함)은, 유동성확보를 위해 폴리칼본산계를 주재로 하며, 폴리에틸렌옥사이드와 마그네슘알루미늄실리케이트가 포함된 첨가제가 포함되는 것을 특징으로 한다. In order to achieve the above object, the general strength high-flow concrete admixture composition of the present invention (hereinafter referred to as "the composition of the present invention") is mainly made of polycarboxylic acid to secure fluidity, and includes polyethylene oxide and magnesium aluminum silicate. It is characterized in that the added additives are included.

하나의 예로 상기 첨가제에는 소듐 폴리아크릴레이트 스타치가 포함되는 것을 특징으로 한다. As an example, the additive is characterized in that sodium polyacrylate starch is included.

하나의 예로 상기 첨가제에는 하이드록시에틸섬유소, 수산화마그네슘이 포함되는 것을 특징으로 한다.As an example, the additive is characterized in that it contains hydroxyethyl cellulose and magnesium hydroxide.

본 발명의 조성물은 저분체 콘크리트에 있어 안정적으로 고유동성이 발현되도록 하면서도 강도저하 없이 재료분리에 대한 저항성, 각종 원인에 의한 균열저항성을 향상시킬 수 있는 장점이 있다.The composition of the present invention has the advantage of improving resistance to material separation and cracking resistance due to various causes while stably exhibiting high fluidity in low-powder concrete.

도 1은 시료별 유동성(FLOW) 실험결과를 나타내는 그래프이고,
도 2는 시료별 U-box 채움높이에 대한 실험결과를 나타내는 그래프이다.
1 is a graph showing the result of an experiment on flowability (FLOW) for each sample,
2 is a graph showing the experimental results for the height of U-box filling for each sample.

이하 본 발명의 실시 예 및 실험 예를 첨부되는 도면을 통해 보다 상세히 설명하도록 한다.Hereinafter, embodiments and experimental examples of the present invention will be described in more detail with reference to the accompanying drawings.

본 발명의 조성물은 폴리칼본산계를 주재로 하며 재료분리에 대한 저항성 등을 향상시키기 위해 첨가제가 포함되는 것을 특징으로 한다.The composition of the present invention is mainly made of polycarboxylic acid and is characterized in that an additive is included in order to improve resistance to material separation.

상기 폴리칼본산계의 경우 기존에 사용하던 혼화제에 비하여 우수한 감수성능을 발휘할 뿐만 아니라, 슬럼프 로스가 적고, 또한 우수한 혼련성을 가지는 특징이 있다. 이러한 폴리칼본산계는 1개의 주쇄와 측쇄로 구성되어 주쇄는 시멘트 입자의 간격을 넓혀 혼합수가 효과적으로 시멘트와 접촉하여 수화반응을 원활하게 하는 기능을 하여 주로 콘크리트의 감수효과를 높이는 역할을 하고, 측쇄는 시간에 따라 감소하는 콘크리트의 유동특성을 지연시켜 작업성 즉 유동성을 높이는 역할을 하는 것이다. In the case of the polycarboxylic acid, not only exhibits excellent water-reducing performance compared to the conventional admixtures, but also has less slump loss and has excellent kneading properties. This polycarboxylic acid system consists of one main chain and a side chain. The main chain increases the water-reducing effect of concrete by expanding the distance between the cement particles and effectively contacting the cement to facilitate the hydration reaction. It plays a role of increasing workability, that is, fluidity, by delaying the flow characteristics of concrete, which decreases with time.

그런데 저분체 콘크리트에서 고유동성을 확보하기 위해 폴리칼본산계를 다량 첨가하는 경우 재료분리가 발생되는 문제가 있는 바, 본 발명에서는 재료분리에 대한 저항성 등을 향상시키기 위해 첨가제가 포함되도록 하는 것이며, 재료분리에 대한 저항성을 향상시키기 위한 첨가제에는 폴리에틸렌옥사이드가 포함되도록 하는 것이다. However, when a large amount of polycarboxylic acid is added to secure high fluidity in low-powder concrete, there is a problem that material separation occurs.In the present invention, the additive is included in order to improve resistance to material separation. The additive for improving the resistance to separation is to include polyethylene oxide.

그런데 첨가제로 폴리에틸렌옥사이드만을 첨가하는 경우 재료분리방지에는 효과가 발현되나 이러한 혼화제를 콘크리트 조성에 배합하여 사용하는 경우 카르복시메틸 반응에서 물이 생성되는데 이렇게 생성된 물이 입자간 응집력을 강화시켜 덩어리지게 하는 현상이 발생되는 바, 이러한 현상에 의해 작업성이 저하되는 문제가 발생되는 경우가 있다. However, when only polyethylene oxide is added as an additive, it is effective to prevent material separation. However, when these admixtures are mixed in the concrete composition, water is generated in the carboxymethyl reaction. As a phenomenon occurs, there may be a problem that the workability is deteriorated due to this phenomenon.

이에 본 발명에서는 첨가제로 폴리에틸렌옥사이드에 더하여 마그네슘알루미늄실리케이트가 더 포함되도록 하는 예를 제시하고 있는데, 상기 마그네슘알루미늄실리케이트는 상기에서 언급한 바와 같이 본 발명의 조성물이 혼화제로서 콘크리트 조성물에 첨가되어 배합될 시에 카르복시메틸 반응에서 생성되는 물을 흡수, 제거함으로써 반응물이 덩어리지는 것을 방지하는 역할을 수행하게 되어 폴리에틸렌옥사이드의 첨가에 의해 재료분리가 방지되도록 하면서 이에 더하여 마그네슘알루미늄실리케이트의 첨가에 의해 작업성이 저하되는 것을 방지토록 하기 위한 것이다.Accordingly, the present invention provides an example in which magnesium aluminum silicate is further included in addition to polyethylene oxide as an additive. As mentioned above, when the composition of the present invention is added to the concrete composition as an admixture and blended By absorbing and removing water generated in the carboxymethyl reaction, it plays a role of preventing the reaction product from being lumped, preventing material separation by the addition of polyethylene oxide, and in addition to this, the workability is lowered by the addition of magnesium aluminum silicate. It is to prevent it from becoming.

이에 더하여 상기 첨가제에 마그네슘알루미늄실리케이트가 첨가됨에 의해 상기에서 언급한 바와 같이 카르복시메틸 반응에서 생성되는 물을 흡수함에 따라 보습제로서 기능도 발현되도록 하는 것이다. In addition, as magnesium aluminum silicate is added to the additive, as mentioned above, the function as a moisturizing agent is also expressed as it absorbs water generated in the carboxymethyl reaction.

즉 본 발명의 조성물이 칼리본산계를 주재로 하고 폴리에틸렌옥사이드를 첨가제로 한 혼화제만을 첨가하는 경우 고유동성 확보에 따른 수축균열의 문제가 유발될 수 있는데 상기 마그네슘알루미늄실리케이트가 첨가됨에 의해 이러한 수축균열의 문제가 제어되는 것이다. That is, when the composition of the present invention is mainly made of calibon acid and only an admixture containing polyethylene oxide as an additive is added, the problem of shrinkage cracking may be caused by securing high fluidity. The addition of magnesium aluminum silicate may cause such shrinkage cracking. The problem is controlled.

이하에서 설명하는 바와 같이 본 발명의 조성물은 균열저항성을 향상시키기 위해 하이드록시에틸섬유소가 포함되도록 하는데 균열제어를 위해 하이드록시에틸섬유소를 다량으로 첨가하는 경우 하이드록시에틸섬유소 간 뭉침이 발생되거나 층분리현상이 발생되는 문제가 있을 수 있는 바, 본 발명의 조성물과 같이 마그네슘알루미늄실리케이트가 첨가되도록 하여 이러한 문제점을 해결하게 된 것이다. As described below, the composition of the present invention contains hydroxyethyl cellulose to improve crack resistance.When hydroxyethyl cellulose is added in a large amount for crack control, aggregation between hydroxyethyl cellulose occurs or layer separation There may be a problem in which the phenomenon occurs, and this problem is solved by adding magnesium aluminum silicate as in the composition of the present invention.

또한 본 발명의 조성물에 있어 상기 첨가제에는 상기 조성들 외에도 소듐 폴리아크릴레이트 스타치가 더 포함되는 예를 제시한다. 이는 상기에서 언급한 바와 같이 본 발명의 조성물에 있어 첨가제에는 폴리에틸렌옥사이드가 포함되어 재료분리를 방지토록 하는데 폴리에틸렌옥사이드에 의해 점성이 너무 일찍 발현되는 경우 충분한 작업성 및 충진성이 확보되지 않는 문제가 있다. In addition, the additive in the composition of the present invention presents an example in which sodium polyacrylate starch is further included in addition to the above compositions. As mentioned above, the additives in the composition of the present invention contain polyethylene oxide to prevent material separation, but when the viscosity is expressed too early by polyethylene oxide, there is a problem that sufficient workability and filling properties are not secured. .

이에 본 발명에서는 상기 조성들 외에도 소듐 폴리아크릴레이트 스타치가 더 포함되도록 하는데 소듐 폴리아크릴레이트 스타치가 포함됨에 의해 배합후 타설과정에까지 작업성이 유지되도록 하는 것이다. 즉 폴리에틸렌옥사이드에 의해 배합물이 젤(Gel) 형태가 되는데 소듐 폴리아크릴레이트 스타치의 첨가에 의해 이러한 배합물이 배합과정 등에서 기계적 충돌에 의해 졸(Sol) 형태로 변하여 작업성이 시간적 경과에도 불구 유지되도록 하는 것이며 이후 타설후에 기계적 충돌 등 에너지가 제거되면 다시 젤(Gel) 형태가 되도록 하는 것이다. Accordingly, in the present invention, in addition to the above compositions, sodium polyacrylate starch is further included. By including sodium polyacrylate starch, workability is maintained until the pouring process after mixing. In other words, polyethylene oxide makes the blend into a gel form, and the addition of sodium polyacrylate starch changes the blend into a sol form due to mechanical impact in the blending process, etc., so that workability is maintained despite the passage of time. After that, when energy such as mechanical collision is removed after pouring, it becomes a gel form again.

상기에서 본 바와 같이 칼리본산계를 주재로 하고 폴리에틸렌옥사이드를 첨가제로 한 혼화제만을 첨가하는 경우 고유동성 확보에 따른 수축균열의 문제가 유발될 수 있다. As described above, when only an admixture made of calibon acid as the main material and polyethylene oxide as an additive is added, a problem of shrinkage cracking due to securing high fluidity may be caused.

이에 본 발명에서는 상기 첨가제에 하이드록시에틸섬유소가 더 포함되는 예를 제시하고 있다. Accordingly, the present invention provides an example in which hydroxyethyl cellulose is further included in the additive.

상기 하이드록시에틸섬유소는 수용성 고분자로서 첨가되는 것으로 수성 성분의 폴리머 에멀젼을 통해 피막기능을 부여하게 되는 것이다. 즉 물에 상기 하이드록시에틸섬유소가 분산된 상태에서 도포 등이 되어 수분증발에 따라 폴리머 필름을 형성시킴으로써 시멘트 입자 표면으로부터의 수분 증발을 억제시킨다. 즉 이러한 하이드록시에틸섬유소에 의해 수분증발을 방지함으로써 모세관현상에 의한 균열 등을 제어하게 되는 것이다. 또한 수분증발에 의한 유동성 저하의 문제도 해결토록 하는 것이다. The hydroxyethyl cellulose is added as a water-soluble polymer and imparts a film function through a polymer emulsion of an aqueous component. In other words, the hydroxyethyl cellulose is dispersed in water to form a polymer film according to the water evaporation, thereby suppressing water evaporation from the surface of the cement particles. That is, moisture evaporation is prevented by the hydroxyethyl fiber, thereby controlling cracking due to capillary phenomenon. It also solves the problem of lowering fluidity due to water evaporation.

이와 같이 저분체 콘크리트에 하이드록시에틸섬유소를 포함하는 혼화제를 첨가하여 고유동성이 확보되도록 함과 동시에 수분증발을 제어하여 균열을 제어토록 하게 된다. In this way, an admixture containing hydroxyethyl cellulose is added to the low-powder concrete to ensure high fluidity, and at the same time, moisture evaporation is controlled to control cracking.

한편 본 발명의 조성물이 특히 대형 구조물 등의 용도로 콘크리트 조성물에 첨가되어 사용될 시 상기에서 언급한 바와 같이 마그네슘알루미늄실리케이트 및 하이드록시에틸섬유소의 상호작용에 의해 수분증발 등에 의한 균열은 제어할 수 있으나 경화과정에서 온도수축에 의한 균열은 제어할 수 없는데 본 발명의 조성물에서는 이러한 온도균열을 제어하기 위한 조성으로서 상기 첨가제에 상기 조성들 외에 수산화마그네슘이 더 포함되는 예를 제시하고 있다. 상기 수산화마그네슘의 경우 페이스트의 경화과정에서 발생되는 경화열을 흡수하여 온도균열을 제어토록 하기 위한 것이다. On the other hand, when the composition of the present invention is added to and used in a concrete composition, especially for large structures, as mentioned above, cracks due to moisture evaporation or the like can be controlled by the interaction of magnesium aluminum silicate and hydroxyethyl fiber, but hardening. In the process, cracks due to temperature contraction cannot be controlled. However, the composition of the present invention provides an example in which magnesium hydroxide is further included in the additive in addition to the above compositions as a composition for controlling such temperature cracking. The magnesium hydroxide is intended to control temperature cracking by absorbing the curing heat generated during the curing process of the paste.

바람직하게 상기 첨가제에는 폴리에틸렌옥사이드 100중량부에 대해 마그네슘알루미늄실리케이트 20 내지 40중량부, 소듐 폴리아크릴레이트 스타치 20 내지 40중량부, 하이드록시에틸섬유소 20 내지 40중량부, 수산화마그네슘 1 내지 5중량부가 포함되도록 하는 것이 타당하다. Preferably, the additive includes 20 to 40 parts by weight of magnesium aluminum silicate, 20 to 40 parts by weight of sodium polyacrylate starch, 20 to 40 parts by weight of hydroxyethyl cellulose, and 1 to 5 parts by weight of magnesium hydroxide based on 100 parts by weight of polyethylene oxide. It makes sense to be included.

이하 실험예를 통해 본 발명의 실시예를 설명한다. Hereinafter, examples of the present invention will be described through experimental examples.

본 실험에서의 각 시료는 하기 표 1에서 보는 바와 같은 배합에 의해 제조되었다. 각 시료에 있어 혼화제(AD)는 혼화제 전체 100중량부에 대해 첨가제 30중량부가 포함되도록 하고, 실시예 1은 첨가제로 폴리에틸렌옥사이드만이 포함된 예이며, 실시예 2는 첨가제로 폴리에틸렌옥사이드 100중량부에 대해 마그네슘알루미늄실리케이트 20중량부가 포함된 예이고, 실시예 3은 첨가제로 폴리에틸렌옥사이드 100중량부에 대해 마그네슘알루미늄실리케이트 20중량부, 소듐 폴리아크릴레이트 스타치 20중량부가 포함된 예이고, 실시예 4는 첨가제로 폴리에틸렌옥사이드 100중량부에 대해 마그네슘알루미늄실리케이트 20중량부, 소듐 폴리아크릴레이트 스타치 20중량부, 하이드록시에틸섬유소 20중량부, 수산화마그네슘 3중량부가 포함된 예이다.Each sample in this experiment was prepared by the formulation as shown in Table 1 below. In each sample, the admixture (AD) is to contain 30 parts by weight of an additive based on the total 100 parts by weight of the admixture, Example 1 is an example containing only polyethylene oxide as an additive, and Example 2 is 100 parts by weight of polyethylene oxide as an additive. For example, 20 parts by weight of magnesium aluminum silicate is included, and Example 3 is an example in which 20 parts by weight of magnesium aluminum silicate and 20 parts by weight of sodium polyacrylate starch are included with respect to 100 parts by weight of polyethylene oxide as an additive, and Example 4 Is an example including 20 parts by weight of magnesium aluminum silicate, 20 parts by weight of sodium polyacrylate starch, 20 parts by weight of hydroxyethyl fiber, and 3 parts by weight of magnesium hydroxide based on 100 parts by weight of polyethylene oxide as additives.

Figure pat00001
Figure pat00001

■ 목표 분체량 : 400 kg/m3 ■ Target powder amount: 400 kg/m 3

■ 목표 유동성 : Slump flow 600 mm 이상■ Target fluidity: Slump flow 600 mm or more

■ 목표 채움성 : U-box 채움 높이 300 mm 이상■ Target fillability: U-box fill height 300 mm or more

■ 목표 공기량 : 4.5 ± 1.5 %■ Target air volume: 4.5 ± 1.5%

■ 목표 유지시간 : 1시간■ Target retention time: 1 hour

Figure pat00002
Figure pat00002

실험결과가 상기 표 2 및 도 1 등에 도시되고 있는데, 실시예 1 내지 4 공히 즉시 및 60분 경시 후 유동성 및 채움성의 실험 목표를 충족하고 있는 것을 알 수 있다. The experimental results are shown in Table 2 and Fig. 1, and it can be seen that both of Examples 1 to 4 meet the experimental goals of fluidity and filling properties immediately and after 60 minutes elapsed time.

실시예 2의 경우가 실시예 1의 경우보다 시간경과(60분)후 유동성 및 채움성에서 유리한 결과가 도출되는 것을 알 수 있는데 이는 실시예 2의 경우 첨가제로 폴리에틸렌옥사이드에 더하여 마그네슘알루미늄실리케이트가 첨가됨에 기인한 것으로 사료되는 바, 상기에서 언급한 바와 같이 마그네슘알루미늄실리케이트가 카르복시메틸 반응에서 생성되는 물을 흡수, 제거함으로써 반응물이 덩어리지는 것을 방지하는 역할을 수행하게 되어 작업성이 저하되는 것을 방지토록 하는 기능이 발현됨에 기인한 것으로 판단된다. In the case of Example 2, it can be seen that more favorable results are derived in the flowability and filling properties after the passage of time (60 minutes) than in the case of Example 1. In the case of Example 2, magnesium aluminum silicate was added in addition to polyethylene oxide as an additive. As mentioned above, magnesium aluminum silicate absorbs and removes water generated in the carboxymethyl reaction, thereby preventing the reactants from lumping, thus preventing deterioration in workability. It is believed that this is due to the expression of the function.

또한 실시예 3의 경우가 실시예 2의 경우보다도 시간경과(60분)후 유동성 및 채움성에서 유리한 결과가 도출되는 것을 알 수 있는데 이는 실시예 3의 경우 첨가제로 소듐 폴리아크릴레이트 스타치가 더 첨가됨에 기인한 것으로 판단되는 바, 상기에서 언급한 바와 같이 소듐 폴리아크릴레이트 스타치의 첨가에 의해 배합물이 배합과정 등에서 기계적 충돌에 의해 졸(Sol) 형태로 변하여 작업성이 시간적 경과에도 불구 유지됨에 기인한 것으로 판단된다. In addition, in the case of Example 3, it can be seen that more favorable results are derived in the flowability and filling properties after the passage of time (60 minutes) than in the case of Example 2. This is because in the case of Example 3, sodium polyacrylate starch was further added as an additive. As mentioned above, the addition of sodium polyacrylate starch causes the blend to change into a sol form due to mechanical impact in the blending process, and the workability is maintained despite the passage of time. It is judged to be.

또한 강도면에서 보면 실시예 2의 경우가 실시예 1의 경우보다 강도면에서 유리한 것을 알 수 있는데 이는 상기에서 언급한 바와 같이 마그네슘알루미늄실리케이트가 수분증발에 의한 균열을 제어함에 기인한 것으로 보이며, 실시예 4의 경우가 실시예 2 및 실시예 3보다 강도면에서 유리한 것을 알 수 있는데 이 경우도 상기에서 언급한 바와 같이 하이드록시에틸섬유소, 수산화마그네슘의 더 첨가됨에 의해 각종 균열에 대한 저항성의 향상에 기인한 것으로 판단된다.In addition, in terms of strength, it can be seen that the case of Example 2 is more advantageous in terms of strength than the case of Example 1. This seems to be due to the control of cracks due to moisture evaporation, as mentioned above, It can be seen that the case of Example 4 is more advantageous in terms of strength than Examples 2 and 3, but also in this case, as mentioned above, by further addition of hydroxyethyl cellulose and magnesium hydroxide, it is possible to improve resistance to various cracks. It is believed to be caused by.

이상 설명한 내용을 통해 당업자라면 본 발명의 기술사상을 일탈하지 아니하는 범위에서 다양한 변경 및 수정이 가능함을 알 수 있을 것이다. 따라서, 본 발명의 기술적 범위는 명세서의 상세한 설명에 기재된 내용으로 한정되는 것이 아니라 특허 청구의 범위에 의해 정하여 져야만 할 것이다. It will be appreciated by those skilled in the art through the above description that various changes and modifications can be made without departing from the technical idea of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the claims.

--

Claims (3)

유동성확보를 위해 폴리칼본산계를 주재로 하며, 폴리에틸렌옥사이드와 마그네슘알루미늄실리케이트가 포함된 첨가제가 포함되는 것을 특징으로 하는 일반강도 고유동 콘크리트용 혼화제 조성물.
An admixture composition for general strength high flow concrete, characterized in that the main material is polycarboxylic acid to secure fluidity, and an additive including polyethylene oxide and magnesium aluminum silicate is included.
제 1항에 있어서,
상기 첨가제에는 소듐 폴리아크릴레이트 스타치가 포함되는 것을 특징으로 하는 일반강도 고유동성 콘크리트용 혼화제 조성물.
The method of claim 1,
The additive is a general strength high fluidity concrete admixture composition, characterized in that it contains sodium polyacrylate starch.
제 2항에 있어서,
상기 첨가제에는 하이드록시에틸섬유소, 수산화마그네슘이 포함되는 것을 특징으로 하는 일반강도 고유동성 콘크리트용 혼화제 조성물.
The method of claim 2,
The additive is a general strength high fluidity concrete admixture composition, characterized in that it contains hydroxyethyl cellulose and magnesium hydroxide.
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