KR102472691B1 - Conservative Mortar Composition Using Tapioca Starch - Google Patents
Conservative Mortar Composition Using Tapioca Starch Download PDFInfo
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- KR102472691B1 KR102472691B1 KR1020210116294A KR20210116294A KR102472691B1 KR 102472691 B1 KR102472691 B1 KR 102472691B1 KR 1020210116294 A KR1020210116294 A KR 1020210116294A KR 20210116294 A KR20210116294 A KR 20210116294A KR 102472691 B1 KR102472691 B1 KR 102472691B1
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- tapioca starch
- core material
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- 229920002472 Starch Polymers 0.000 title claims abstract description 25
- 239000008107 starch Substances 0.000 title claims abstract description 25
- 235000019698 starch Nutrition 0.000 title claims abstract description 25
- 240000003183 Manihot esculenta Species 0.000 title claims abstract description 24
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 title claims abstract description 24
- 239000000203 mixture Substances 0.000 title claims abstract description 24
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- 229960002079 calcium pantothenate Drugs 0.000 claims description 7
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- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 3
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- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical group C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
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- 229910000805 Pig iron Inorganic materials 0.000 description 1
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 240000003307 Zinnia violacea Species 0.000 description 1
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 description 1
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- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
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- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Inorganic materials O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 1
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- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/38—Polysaccharides or derivatives thereof
-
- 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
- C04B14/00—Use 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
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1022—Non-macromolecular compounds
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1048—Polysaccharides, e.g. cellulose, or derivatives thereof
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/12—Multiple coating or impregnating
- C04B20/123—Multiple coatings, for one of the coatings of which at least one alternative is described
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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
- 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
- C04B24/124—Amides
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/4596—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with fibrous materials or whiskers
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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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/47—Oils, fats or waxes natural resins
- C04B41/474—Natural resins, e.g. rosin
- C04B41/476—Cellulosic waste liquor, e.g. sulfite lye
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
Abstract
Description
본 발명은 타피오카전분을 활용한 보수 모르타르 조성물에 관한 것으로, 열화된 콘크리트 구조물의 손상부위를 보수함에 있어 접착강도, 내구성 등을 향상시킬 수 있는 보수 모르타르 조성물에 관한 것이다. The present invention relates to a repair mortar composition using tapioca starch, and relates to a repair mortar composition capable of improving adhesive strength, durability, etc. in repairing a damaged portion of a deteriorated concrete structure.
시멘트를 사용한 콘크리트는 건설 재료로 가장 널리 사용되고 있으며, 앞으로도 관련 기술의 발전을 통하여 중추적인 건설 재료로 사용될 것이다. 그러나 콘크리트는 압축강도에 비해 인장강도가 낮은 재료이기 때문에 콘크리트 구조물의 균열발생이 불가피하여 잠재적 위험성을 항상 가지고 있다. 따라서, 콘크리트 부식에 의한 유지관리 및 보수에 많은 사회적 비용이 소요됨으로써 구조물의 유지관리 및 보수분야 사업의 비중이 점차 높아지고 있는 현실이다.Concrete using cement is the most widely used construction material, and will continue to be used as a pivotal construction material through the development of related technologies. However, since concrete is a material with a lower tensile strength than compressive strength, cracks in concrete structures are unavoidable and always have potential risks. Therefore, as maintenance and repair due to concrete corrosion requires a lot of social costs, the proportion of maintenance and repair projects in structures is gradually increasing.
이러한 콘크리트 구조물의 보수/보강을 위한 모르타르 조성물로 다양한 기술이 제시되고 있는 바, 일 예로 대한민국 특허등록 제0975371호에서는 초속경시멘트 16~19 중량%, 직선형 강섬유 4~5 중량%, 잔골재 33~39 중량%, 굵은 골재 34~35 중량%, 물 6~7.9중량%, 고성능감수제 및 지연제 0.5~0.6 중량%로 이루어진 것을 특징으로 하는 초속경 강섬유보강콘크리트 조성물 및 이를 이용한 포장보수방법에 대해서 제시한다. Various technologies have been proposed as mortar compositions for repair/reinforcement of such concrete structures. For example, in Korean Patent Registration No. 0975371, 16 to 19% by weight of ultra-fast cement, 4 to 5% by weight of straight steel fiber, and 33 to 39% by weight of fine aggregate We present an ultra-fast-hardening steel fiber-reinforced concrete composition and a pavement repair method using the same, characterized in that it consists of 34 to 35% by weight of coarse aggregate, 6 to 7.9% by weight of water, and 0.5 to 0.6% by weight of a high-performance water reducing agent and retardant. .
그러나 상기 기술의 경우 콘크리트 구조물과의 충분한 부착성능을 담보할 수 없는 문제가 있다. However, in the case of the above technology, there is a problem in that sufficient adhesion performance with the concrete structure cannot be guaranteed.
본 발명은 앞에서 설명한 바와 같은 종래 기술의 문제점을 해결하기 위하여 발명된 것으로서, 본 발명은 충분한 부착성능이 발현되도록 하면서 압축강도, 작업성도 만족할 수 있는 보수 모르타르 조성물을 제공하고자 함이다. The present invention was invented to solve the problems of the prior art as described above, and the present invention is to provide a repair mortar composition capable of satisfying compressive strength and workability while ensuring sufficient adhesion performance.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 타피오카 전분 활용 보수모르타르 조성물(이하 "본 발명의 조성물"이라함)은, 시멘트를 포함하는 결합재; 골재; 단섬유; 타피오카 전분을 포함하는 혼화제;를 포함하는 것을 특징으로 한다. The repair mortar composition using tapioca starch according to the present invention (hereinafter referred to as "the composition of the present invention") for achieving the above object is a binder containing cement; aggregate; short fibers; It is characterized in that it comprises; admixture containing tapioca starch.
하나의 예로 상기 혼화제는 판토텐산칼슘이 더 포함되는 것을 특징으로 한다. As an example, the admixture is characterized in that it further contains calcium pantothenate.
하나의 예로 상기 단섬유는 유리섬유사로 구성된 심재; 폴리올, 유기 디이소시아네이트를 포함하는 코팅층;을 포함하는 것을 특징으로 한다. As an example, the short fiber is a core material composed of glass fiber yarn; It is characterized in that it comprises; a coating layer containing polyol and organic diisocyanate.
하나의 예로 상기 심재와 상기 코팅층 사이에는 알킬 포스페이트, 카복시메틸 셀룰로오스를 포함하는 중간층이 더 포함되는 것을 특징으로 한다. As an example, an intermediate layer including an alkyl phosphate and carboxymethyl cellulose is further included between the core material and the coating layer.
앞서 설명한 바와 같이, 본 발명의 조성물은 부착강도, 압축강도, 균열저항성이 증진되는 것은 물론 작업성도 증진시킬 수 있는 장점이 있다.As described above, the composition of the present invention has the advantage of improving workability as well as improving adhesion strength, compressive strength, and crack resistance.
도 1은 타피오카 전분을 나타내는 사진이며,
도 2는 타피오카 전분의 현미경 사진이고,
도 3은 타피오카 전분의 입자형태를 나타내는 그림이다.1 is a photograph showing tapioca starch,
2 is a micrograph of tapioca starch,
3 is a diagram showing the particle shape of tapioca starch.
아래에서는 본 발명에 따른 양호한 실시 예를 상세히 설명한다.In the following, preferred embodiments according to the present invention will be described in detail.
본 발명은 시멘트를 포함하는 결합재; 골재; 단섬유; 타피오카 전분을 포함하는 혼화제;를 포함하는 것을 특징으로 한다. The present invention is a binder containing cement; aggregate; short fibers; It is characterized in that it comprises; admixture containing tapioca starch.
상기 시멘트는 당업계에서 모르타르 또는 콘크리트 등에 포함되는 것이라면 종류를 한정하지 않으며, 바람직하게는 일반 포틀랜드 시멘트, 조강 포틀랜드 시멘트, 초조강 포틀랜드 시멘트, 중용열 포틀랜드 시멘트, 내황산염 포틀랜드 시멘트, 백색 포틀랜드 시멘트 및 초속경 시멘트 중 어느 하나 또는 이들의 혼합물을 사용할 수 있으나 이에 한정하는 것은 아니며, 시멘트 분말형태 뿐만 아니라 클링커 형태도 사용 가능하다. 다만 시멘트 클링커를 사용하는 경우 전처리로 소성 및 분쇄과정을 거친 것을 사용하는 것이 바람직하다. The cement is not limited in type as long as it is included in mortar or concrete in the art, and preferably, general Portland cement, early strength Portland cement, ultra-high strength Portland cement, medium heat Portland cement, sulfate-resistant Portland cement, white Portland cement, and zinnia Any one of hard cement or a mixture thereof may be used, but is not limited thereto, and cement powder form as well as clinker form may be used. However, when using cement clinker, it is preferable to use a cement clinker that has undergone a firing and grinding process as a pretreatment.
상기 물은 종류에 한정하지 않으나, 불순물이 없고 깨끗하게 정제된 물을 사용하는 것이 좋다. 또한 물과 결합재(W/B)는 설계기준강도 및 배합강도와 같은 콘크리트의 강도와 내구성 등을 결정하는 수치로서, W/B가 30 내지 55 중량%가 되도록 하는 것이 콘크리트의 건조수축, 재료 분리 등이 일어나지 않는 조건으로 바람직하다.The water is not limited to the type, but it is preferable to use purified water without impurities. In addition, water and binder (W/B) are values that determine the strength and durability of concrete, such as design standard strength and mixing strength. It is preferable under the condition that the etc. do not occur.
상기 결합재에는 고로슬래그 또는 플라이애시가 포함될 수 있다. The binder may include blast furnace slag or fly ash.
상기 고로슬래그는 선철 제조 공정의 부산물인 수재슬래그를 미분쇄한 것으로 시멘트의 장기강도를 높여주고, 수밀성, 내해수성을 증대시키는 역할을 하게 된다. 상기 고로슬래그는 분말도 2,000 내지 15,000㎠/g, 바람직하게는 4,000 내지 8,000㎠/g 을 사용하는 것이 콘크리트 조성물의 유동성을 유지시키면서 콘크리트 조성물의 강도발현이 저하되지 않아 좋다. The blast furnace slag is finely pulverized granulated slag, which is a by-product of the pig iron manufacturing process, and serves to increase the long-term strength of cement and increase water tightness and seawater resistance. The blast furnace slag has a powder degree of 2,000 to 15,000 cm 2 / g, preferably 4,000 to 8,000 cm 2 / g, so that the strength development of the concrete composition is not reduced while maintaining the fluidity of the concrete composition.
특히 상기 고로슬래그는 전체 100 중량% 중에서 2 내지 6 중량%의 무수황산(SO3)을 포함하는 것이 좋으며, 바람직하게는 2 내지 3 중량% 첨가하는 것이 좋다. 상기 무수황산은 고로슬래그를 미분쇄할 때 첨가되는 것이며, 보조자극제의 역할을 수행하게 된다.In particular, the blast furnace slag preferably contains 2 to 6% by weight of sulfuric anhydride (SO 3 ) out of 100% by weight, preferably 2 to 3% by weight. The anhydrous sulfuric acid is added when blast furnace slag is pulverized, and serves as a co-stimulant.
즉 본 발명에서 고로슬래그는 무수황산을 첨가한 상태에서 밀 등의 분쇄수단을 이용하여 미분말화 한 것으로, 입도분포가 일정하게 유지되는 것이 바람직하다. 예컨대 상기 고로슬래그 미분말은 평균 직경 약 6㎛가 되도록 분쇄될 수 있다. 고로슬래그 미분말을 사용하는 이유는 다음과 같다.That is, in the present invention, the blast furnace slag is finely pulverized using a grinding means such as a mill in the state in which anhydrous sulfuric acid is added, and it is preferable that the particle size distribution is maintained constant. For example, the blast furnace slag fine powder may be pulverized to have an average diameter of about 6 μm. The reason for using the blast furnace slag fine powder is as follows.
먼저, 통상의 시멘트의 평균 입자 크기는 16㎛로 시멘트 입자를 둥근 입자로 가정했을 때, 그 공극에 들어갈 수 있는 입자의 크기는 약 6㎛이다. 고로슬래그를 약 6㎛ 이하로 분쇄하여 시멘트 입자 사이를 충진시켜 줌으로써 페이스트의 치밀화가 유도되는 것이다. 이에 더하여 고로슬래그를 미분말화 하는 이유는 Ca(OH)2의 생성량 억제에 있다. 수화생성물로 크게 규산칼슘수화물(calcium silicate hydrate)과 수산화칼슘이 발생하는 데 보통 시멘트 경화체내에 약 20 내지 30% 정도의 수산화칼슘이 발생한다. 이러한 수산화칼슘은 황산에 매우 약하여 다음 반응을 통해 석고가 발생되도록 한다. First, the average particle size of normal cement is 16 μm, and when cement particles are assumed to be round, the particle size that can enter the pores is about 6 μm. Densification of the paste is induced by grinding the blast furnace slag to about 6 μm or less to fill the space between the cement particles. In addition to this, the reason for pulverizing blast furnace slag is to suppress the amount of Ca(OH) 2 produced. Calcium silicate hydrate and calcium hydroxide are largely generated as hydration products, and about 20 to 30% of calcium hydroxide is usually generated in the cement curing body. This calcium hydroxide is very weak to sulfuric acid, so gypsum is generated through the following reaction.
Ca(OH)2 + H2SO4 → CaSO4ㅇ2H2OCa(OH) 2 + H 2 SO 4 → CaSO 4 ㅇ2H 2 O
이렇게 생성된 석고는 팽창파괴를 일으키는 원인이 되는 에트린자이트를 생성시키는 물질로 작용하여 화학적 부식에 의한 균열, 박리현상을 초래하는 것이다. The gypsum produced in this way acts as a material that generates ettringite, which causes expansion failure, and causes cracking and peeling due to chemical corrosion.
즉 분말도가 높은 고로슬래그를 혼입한 시멘트 경화체의 경우 칼슘 실리케이트(CSH) 수화물이 다량 생성되지만, 황산에 약한 수산화칼슘의 생성은 제어되어 내황산성에도 뛰어난 효과가 발현되도록 하는 것이다.That is, in the case of hardened cement containing high-fineness blast furnace slag, a large amount of calcium silicate (CSH) hydrate is produced, but the production of calcium hydroxide, which is weak to sulfuric acid, is controlled so that excellent sulfuric acid resistance is exhibited.
또한 본 발명의 조성물에는 상기에서 언급한 바는 없으나 굵은 골재와 잔 골재가 더 포함될 수 있는데, 상기 굵은 골재는 일반적으로 자갈(gravels)로도 불리며, 당업계에서 일반적으로 사용하는 것이라면 종류에 한정하지 않는다. 상기 굵은 골재는 부순 골재 또는 천연골재를 사용하는 것이 좋으며, 바람직하게는 KS F 2502 또는 KS F 2527을 만족하는 것을 사용하는 것이 좋다.In addition, although not mentioned above, the composition of the present invention may further include coarse aggregates and fine aggregates. The coarse aggregates are generally referred to as gravels, and are not limited to types commonly used in the art. . It is preferable to use crushed aggregate or natural aggregate as the coarse aggregate, preferably one that satisfies KS F 2502 or KS F 2527.
상기 잔골재는 일반적으로 모래라고 통칭되는 것으로 미세골재, 거친골재 모두 사용이 가능하다. 상기 미세골재는 4번 체(ASTM C125, 4.75mm)를 거의 완전하게 통과하는 물질이 좋으며, 실리카 모래 등을 사용하는 것이 좋다. 상기 거친 골재는 4번 채(ASTM C125, 4.75mm)에 주로 남아있는 물질, 예를 들어 실리카 모래, 석영, 대리석, 화강암, 석회석, 방해석, 장석, 충적사, 기타 모래 등 다른 내구성 골재 또는 이들의 혼합물이 좋다. The fine aggregate is generally referred to as sand, and both fine aggregate and coarse aggregate can be used. The fine aggregate is preferably a material that passes almost completely through the No. 4 sieve (ASTM C125, 4.75 mm), and it is preferable to use silica sand or the like. The coarse aggregate is a material mainly remaining in sieve No. 4 (ASTM C125, 4.75mm), for example, other durable aggregates such as silica sand, quartz, marble, granite, limestone, calcite, feldspar, alluvial sand, and other sand, or their The mixture is good.
또한 본 발명에서는 콘크리트의 유동성을 결정하기 위하여 잔골재율(S/a)이 35 내지 55 부피%를 만족하는 것이 좋은데, 이는 전체 골재(모래+자갈, a)체적에 대한 모래(S)의 체적비로 계산할 수 있다.In addition, in the present invention, in order to determine the fluidity of concrete, it is preferable that the fine aggregate ratio (S / a) satisfies 35 to 55% by volume, which is the volume ratio of sand (S) to the total aggregate (sand + gravel, a) volume can be calculated
한편 본 발명의 조성물에는 단섬유, 타피오카 전분을 포함하는 혼화제가 더 첨가되는데, 바람직하게는 중량비로 결합재 100중량부에 대해 골재 100 내지 200중량부, 단섬유 0.1 내지 5중량부, 혼화제 0.01 내지 1중량부로 배합됨이 타당하다. Meanwhile, an admixture containing short fibers and tapioca starch is further added to the composition of the present invention, preferably 100 to 200 parts by weight of aggregate, 0.1 to 5 parts by weight of short fibers, and 0.01 to 1 part by weight of admixture based on 100 parts by weight of binder in weight ratio. It is reasonable to mix by weight.
상기 혼화제에는 도 1 내지 도 3에 도시된 타피오카 전분이 포함되는 바, 상기 타피오카 전분은 열대지방에서 서식하는 카사바 뿌리줄기에서 추출한 전분으로 음식재료로서 가공되어 많이 사용되고 있으나, 접착제, 종이, 비누, 세정제 등의 다양하게 활용되고 있다. 이에 본 발명의 조성물에서는 타피오카 전분의 유기접착제(천연수지계) 성질을 활용하여 점도 및 강도 증진의 효과가 발현되도록 하는 것이다. The admixture includes the tapioca starch shown in FIGS. 1 to 3. The tapioca starch is starch extracted from cassava rhizomes that live in the tropics and is widely used as a food ingredient, but is used as an adhesive, paper, soap, and detergent. It is used in a variety of ways, such as Therefore, in the composition of the present invention, the effect of increasing viscosity and strength is expressed by utilizing the organic adhesive (natural resin) property of tapioca starch.
그런데 상기 타피오카 전분만을 첨가하는 경우 점성이 증가에 의해 분산이 용이하지 않은 문제가 있을 수 있다. 이에 상기 혼화제에는 타피오카 전분에 더하여 판토텐산칼슘이 더 포함되는 예를 제시하고 있다. However, when only the tapioca starch is added, there may be a problem in that dispersion is not easy due to an increase in viscosity. Accordingly, an example in which the admixture further includes calcium pantothenate in addition to tapioca starch is presented.
상기 혼화제에 판토텐산칼슘이 더 첨가됨에 의해 배합과정에서 타 조성이 타피오카 전분에 의해 응집되는 것을 제어토록 하는 것이다. By adding calcium pantothenate to the admixture, it is to control the aggregation of other components by tapioca starch during the mixing process.
바람직하게 상기 혼화제에는 중량비로 타피오카 전분과 판토텐산칼슘이 (8:2) 내지 (9.8:0.2)의 중량비로 혼합되는 것이 타당하다. Preferably, it is reasonable that tapioca starch and calcium pantothenate are mixed in a weight ratio of (8:2) to (9.8:0.2) in the admixture.
상기 단섬유는 페이스트의 가교작용을 통해 균열저항성을 향상시키도록 하는 것인데 더욱 바람직하게는 상기 단섬유는 유리섬유사로 구성된 심재; 폴리올, 유기 디이소시아네이트를 포함하는 코팅층;을 포함하는 것을 특징으로 한다.The short fibers are to improve crack resistance through a cross-linking action of the paste, more preferably, the short fibers are a core material composed of glass fiber yarns; It is characterized in that it comprises; a coating layer containing polyol and organic diisocyanate.
상기 심재는 복수의 유리섬유 단사로 이루어지는데, 페이스트의 가교작용, 골재와 페이스트 간 맞물림 응력증대 등이 기능이 발현되도록 하는 것이다. The core material is composed of a plurality of glass fiber single yarns, and functions such as crosslinking of the paste and increase of interlocking stress between the aggregate and the paste are expressed.
상기 코팅층은 저융점 열가소성 수지로 구성되어 콘크리트가 배합 및 양생될 때 발생하는 경화열에 의해 코팅층이 용융되도록 하는 것이다. 이렇게 코팅층이 구성되어 보관 및 배합과정 등에서 단섬유간 응집이 제어되도록 하여 분산성을 확보토록 하는 것이며, 충분히 균일하게 배합된 후에는 경화열에 의해 용융되도록 하여 페이스트의 수밀성이 확보되도록 하는 것이다. The coating layer is composed of a low-melting thermoplastic resin so that the coating layer is melted by hardening heat generated when concrete is mixed and cured. In this way, the coating layer is configured to control aggregation between single fibers during storage and mixing to secure dispersibility, and after sufficiently uniform mixing, to melt by curing heat to ensure watertightness of the paste.
상기 코팅층은 폴리올, 유기 디이소시아네이트가 포함되는 조성물에 의해 형성되며, 이에 더하여 에틸렌글리콜이 더 포함되는 조성물에 의해 형성된다. The coating layer is formed by a composition containing polyol and organic diisocyanate, and further includes ethylene glycol.
바람직하게 중량평균분자량이 1,200 ~ 1,500인 폴리올 100중량부에 대해 에틸렌글리콜 10 내지 30중량부, 유기 디이소시아네이트 20 ~ 50 중량부를 배합토록 하는 것이 타당하다. Preferably, it is appropriate to blend 10 to 30 parts by weight of ethylene glycol and 20 to 50 parts by weight of organic diisocyanate with respect to 100 parts by weight of a polyol having a weight average molecular weight of 1,200 to 1,500.
상기 폴리올은, 폴리에스테르 디올, 폴리에테르 디올 및 폴리카보네트 디올 중에서 하나 이상을 사용하고, 상기 유기 디이소시아네이트는 디페닐메탄 디이소시아네이트, 톨루엔 디이소시아네이트, 헥사메틸렌 디이소시아네이트, 디시클로헥실메탄 디이소시아네이트, 이소포론디이소시아네이트 및 나프탈렌 디이소시아네이트 중에서 하나 이상을 사용하는 것이 타당하다. The polyol uses at least one of polyester diol, polyether diol and polycarbonate diol, and the organic diisocyanate is diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, It is reasonable to use at least one of isophorone diisocyanate and naphthalene diisocyanate.
경화열은 시멘트의 종류와 혼입량, 혼화재의 종류, 혼화재의 혼입량, 혼화제 종류 등 다양한 원인에 의해 그 범위가 다르지만 대략 최고온도 섭씨 50도 내지 90도의 범위를 가지는 바, 상기 코팅층의 경우도 상기 배합범위에서 섭씨 50도 내지 90도의 저융점이 형성되도록 하는 것이 타당하다.The heat of curing varies in its range depending on various causes such as the type and amount of cement, the type of admixture, the amount of admixture, the type of admixture, etc., but has a range of about 50 to 90 degrees Celsius at a maximum temperature, and the coating layer also has the above mixing range It is reasonable to form a low melting point of 50 to 90 degrees Celsius at .
한편 상기 코팅층이 보관과정 또는 배합초기에 용융되거나 벗겨지는 경우 유리섬유사로 이루어진 심재에 마찰로 정전기가 발생되어 섬유간 응집이 발생되거나 타 조성과 응집이 발생되어 균일한 분산을 저해하는 요인으로 작용할 수 있는 바, 본 발명에서는 상기 심재와 상기 코팅층 사이에는 알킬 포스페이트, 카복시메틸 셀룰로오스(carboxylmethyl cellulose)를 포함하는 중간층이 더 포함되는 예를 제시한다.On the other hand, when the coating layer is melted or peeled off during storage or at the beginning of mixing, static electricity is generated due to friction on the core material made of glass fiber yarns, resulting in agglomeration between fibers or aggregation with other compositions, which can act as a factor that hinders uniform dispersion. As such, the present invention suggests an example in which an intermediate layer including alkyl phosphate and carboxylmethyl cellulose is further included between the core material and the coating layer.
상기 알킬 포스페이트는 심재에 정전기 발생을 방지토록 하는 조성에 해당하며, 상기 카복시메틸 셀룰로오스는 점성제로서 첨가되는데 상기 카복시메틸 셀룰로오스는 점탄성을 향상시킴으로써 심재의 분산과정에서 점성을 낮추어 균일한 분산이 이루어지도록 함과 동시에 분산 후 점성이 복원되도록 하여 페이스트와 심재의 부착강도를 증진시키도록 하는 것이다. 즉 카복시메틸 셀룰로오스는 코팅층이 제거후 페이스트의 수분과 반응을 통해 점진적으로 점성이 발현되도록 함으로써 심재의 충분한 분산이 이루어진 후에 부착강도가 발현되도록 하는 것이다. The alkyl phosphate corresponds to a composition for preventing static electricity generation in the core material, and the carboxymethyl cellulose is added as a viscous agent. The carboxymethyl cellulose improves viscoelasticity to lower the viscosity during the dispersion process of the core material so that uniform dispersion is achieved. At the same time, the viscosity is restored after dispersion to enhance the adhesive strength between the paste and the core material. That is, carboxymethyl cellulose is to gradually develop viscosity through reaction with moisture of the paste after the coating layer is removed, so that adhesive strength is developed after sufficient dispersion of the core material.
이하에서는 실험 예에 의해 본 발명에 대해 설명한다.Hereinafter, the present invention will be described by means of experimental examples.
하기에서 보는 바와 같이 각각 시료를 제작하였으며, 그 실험결과가 표 1에 도시되고 있다. As shown below, each sample was prepared, and the experimental results are shown in Table 1.
[실시예 1][Example 1]
시멘트 100중량부에 대해 골재 150중량부, 단섬유 1중량부, 혼화제 0.1중량부를 배합하되, 단섬유는 유리섬유로 구성되고, 혼화제에는 타피오카 전분만이 포함되도록 하여 시료를 제작하였다. Samples were prepared by mixing 150 parts by weight of aggregate, 1 part by weight of short fibers, and 0.1 part by weight of an admixture with respect to 100 parts by weight of cement, but the short fibers were composed of glass fibers and only tapioca starch was included in the admixture.
[실시예 2][Example 2]
시멘트 100중량부에 대해 골재 150중량부, 단섬유 1중량부, 혼화제 0.1중량부를 배합하되, 단섬유는 유리섬유로 구성되고, 혼화제에는 타피오카 전분 및 판토텐산칼슘이 포함되며, 타피오카 전분과 판토텐산칼슘은 중량비로 9:1로 배합하여 시료를 제작하였다. 150 parts by weight of aggregate, 1 part by weight of short fibers, and 0.1 part by weight of an admixture were mixed with 100 parts by weight of cement, but the short fibers were composed of glass fibers, and the admixture contained tapioca starch and calcium pantothenate. Samples were prepared by mixing at a weight ratio of 9:1.
[실시예 3][Example 3]
실시예 2와 동일하게 배합하되, 단섬유는 유리섬유사로 구성된 심재와, 폴리올, 유기 디이소시아네이트를 포함하는 코팅층으로 구성되도록 하여 시료를 제작하였다. Samples were prepared by mixing in the same manner as in Example 2, but with short fibers composed of a core material composed of glass fiber yarns and a coating layer containing polyol and organic diisocyanate.
[실시예 4][Example 4]
실시예 3과 동일하게 배합하되, 단섬유는 유리섬유사로 구성된 심재와, 알킬 포스페이트, 카복시메틸 셀룰로오스를 포함하는 중간층과, 폴리올, 유기 디이소시아네이트를 포함하는 코팅층으로 구성되도록 하여 시료를 제작하였다. Samples were prepared by mixing in the same manner as in Example 3, but consisting of a core material composed of glass fiber yarns for short fibers, an intermediate layer containing alkyl phosphate and carboxymethyl cellulose, and a coating layer containing polyol and organic diisocyanate.
[비교예][Comparative example]
시멘트 100중량부에 대해 골재 150중량부, 단섬유 1중량부, 혼화제 0.1중량부를 배합하되, 단섬유는 유리섬유로 구성되고, 혼화제에는 옥수수 전분만이 포함되도록 하여 시료를 제작하였다. Samples were prepared by mixing 150 parts by weight of aggregate, 1 part by weight of short fibers, and 0.1 part by weight of an admixture with respect to 100 parts by weight of cement, but the short fibers were composed of glass fibers and only corn starch was included in the admixture.
(28d, MPa)compressive strength
(28d, MPa)
(28d, MPa)adhesion strength
(28d, MPa)
상기 표 1에서 보는 바와 같이 작업성면(플로우)에서 보면 실시예 1보다 실시예 2가 더 우수한 결과가 도출되는 것을 알 수 있는데, 이는 실시예 2의 혼화제에 판토텐산칼슘이 더 첨가되어 부착강도면에서 거의 동일한 결과를 도출하나 작업성면에서 유리한 결과가 도출되도록 하는 것을 알 수 있다. As shown in Table 1, it can be seen that Example 2 produces better results than Example 1 in terms of workability (flow), which is due to the addition of calcium pantothenate to the admixture of Example 2, It can be seen that almost the same results are obtained, but advantageous results are obtained in terms of workability.
압축강도면에서 실시예들이 비교예보다 우수한 것을 알 수 있는데, 기존 증점제로 옥수수전분보다 타피카오 전분이 압축강도면에서 우수한 결과를 도출하는 것을 알 수 있다. 또한 실시예 3이 실시예 2보다 유리한 결과를 도출하는 것을 알 수 있는데, 이는 실시예 2 및 실시예 1의 경우 단섬유로 유리섬유가 첨가되도록 하여 단섬유간 뭉침 등에 의해 실시예 3의 경우보다 압축강도가 저하되는 효과가 발현되는 것으로 판단된다. 즉 실시예 3의 경우 단섬유는 유리섬유사로 구성된 심재와, 저융점의 열가소성 수지로 구성된 코팅층으로 구성되도록 하여 단섬유가 배합과정에서 균일하게 분산되도록 함에 기인한 것으로 판단된다. 이러한 점은 균열저항성(길이변화)에서도 실시예 3이 실시예 2보다 유리한 결과로서 도출되도록 하는 것을 알 수 있다. It can be seen that the examples are superior to the comparative examples in terms of compressive strength, and it can be seen that tapicao starch as a conventional thickener produces superior results in terms of compressive strength than corn starch. In addition, it can be seen that Example 3 derives more advantageous results than Example 2. This is because, in the case of Example 2 and Example 1, glass fibers are added as short fibers, resulting in aggregation between single fibers, etc., compared to Example 3. It is judged that the effect of reducing the compressive strength is expressed. That is, in the case of Example 3, it is determined that the short fibers are composed of a core material composed of glass fiber yarns and a coating layer composed of a low melting point thermoplastic resin so that the short fibers are uniformly dispersed during the mixing process. It can be seen that this point allows Example 3 to lead to more advantageous results than Example 2 in crack resistance (length change).
균열저항성의 면에서 실시예 4가 가장 유리한 결과로서 도출되는 것을 알 수 있는데, 이는 단섬유에 심재와 코팅층 사이에 알킬 포스페이트, 카복시메틸 셀룰로오스를 포함하는 조성물에 의해 중간층이 형성되도록 함에 기인한 것으로 판단된다. 즉 배합과정 등에 코팅층이 조기에 용융이 이루어지더라도 심재에 마찰에 의한 정전기의 발생을 제어함으로써 섬유간 응집을 제어하고, 충분한 분산후 점성이 발현되도록 하는 것에 기인한 것으로 판단된다. 이러한 점은 부착강도에 있어서도 실시예 4가 가장 유리한 결과를 도출하는 것으로 제시되고 있는 것이다. In terms of crack resistance, it can be seen that Example 4 is derived as the most advantageous result, which is judged to be due to the formation of an intermediate layer by a composition containing alkyl phosphate and carboxymethyl cellulose between the core material and the coating layer in the short fiber. do. That is, even if the coating layer is melted early in the mixing process, it is determined that it is due to controlling the cohesion between fibers by controlling the generation of static electricity due to friction on the core material, and ensuring that viscosity is developed after sufficient dispersion. This point suggests that Example 4 derives the most advantageous results in terms of adhesion strength.
이상과 같이 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 상기 실시예에 한정되지 않음은 물론이며, 본 발명이 속하는 분야에서 통상의 기술적 지식을 가진 자에 의해 상기 기재된 내용으로부터 다양한 수정 및 변형이 가능할 수 있음은 물론이다.As described above, although the present invention has been described with limited embodiments and drawings, the present invention is not limited to the above embodiments, of course, from the above description by a person having ordinary technical knowledge in the field to which the present invention belongs. Of course, various modifications and variations may be possible.
Claims (4)
상기 단섬유는,
유리섬유사로 구성된 심재; 폴리올, 유기 디이소시아네이트를 포함하는 코팅층; 및 알킬 포스페이트, 카복시메틸 셀룰로오스를 포함하고 상기 심재와 상기 코팅층 사이에 마련되는 중간층을 포함하며, 상기 중간층이 심재에 정전기 발생을 방지하면서 상기 코팅층의 제거후 페이스트의 수분과 반응을 통해 점진적으로 점성이 발현되도록 유도하여 심재의 분산이 이루어진 후 부착강도가 발현될 수 있게 하는 것을 특징으로 하는 타피오카 전분 활용 보수모르타르 조성물.
A binder containing cement; aggregate; short fibers; An admixture containing tapioca starch; including,
The single fiber,
A core material composed of glass fiber yarn; a coating layer containing polyol and organic diisocyanate; and an intermediate layer comprising alkyl phosphate and carboxymethyl cellulose and provided between the core material and the coating layer, wherein the intermediate layer prevents static electricity from being generated in the core material and gradually becomes viscous through reaction with moisture of the paste after removal of the coating layer. A repair mortar composition using tapioca starch, characterized in that the adhesive strength can be expressed after the core material is dispersed by inducing to express.
상기 혼화제는 판토텐산칼슘이 더 포함되는 것을 특징으로 하는 타피오카 전분 활용 보수모르타르 조성물.According to claim 1,
The admixture is tapioca starch utilization repair mortar composition, characterized in that it further contains calcium pantothenate.
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| KR20010103702A (en) * | 1998-11-16 | 2001-11-23 | 추후제출 | Polyisocyanurate Compositions and Composites |
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