KR101995844B1 - Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same - Google Patents

Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same Download PDF

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Publication number
KR101995844B1
KR101995844B1 KR1020180161673A KR20180161673A KR101995844B1 KR 101995844 B1 KR101995844 B1 KR 101995844B1 KR 1020180161673 A KR1020180161673 A KR 1020180161673A KR 20180161673 A KR20180161673 A KR 20180161673A KR 101995844 B1 KR101995844 B1 KR 101995844B1
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South Korea
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weight
parts
thickener
underwater concrete
concrete structure
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KR1020180161673A
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Korean (ko)
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이동우
안신영
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이동우
신영건설(주)
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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
    • C04B41/50—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 inorganic materials
    • C04B41/5076—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 inorganic materials with masses bonded by inorganic cements
    • C04B41/5084—Lime, hydraulic lime or magnesium oxide cements
    • 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
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • 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
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/062—Microsilica, e.g. colloïdal silica
    • C—CHEMISTRY; METALLURGY
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    • C04B16/00—Use 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
    • C04B16/04—Macromolecular compounds
    • C04B16/06—Macromolecular compounds fibrous
    • C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B16/0625—Polyalkenes, e.g. polyethylene
    • C04B16/0633—Polypropylene
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    • C04B16/00—Use 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
    • C04B16/04—Macromolecular compounds
    • C04B16/06—Macromolecular compounds fibrous
    • C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B16/0691—Polyamides; Polyaramides
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    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/0409—Waste from the purification of bauxite, e.g. red mud
    • C—CHEMISTRY; METALLURGY
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    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • C—CHEMISTRY; METALLURGY
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    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/146—Silica fume
    • C—CHEMISTRY; METALLURGY
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    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
    • C—CHEMISTRY; METALLURGY
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    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/16—Sulfur-containing compounds
    • C04B24/20—Sulfonated aromatic compounds
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C04B24/2623—Polyvinylalcohols; Polyvinylacetates
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C04B24/2641—Polyacrylates; Polymethacrylates
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    • 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
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/287—Polyamides
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    • 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
    • C04B24/383—Cellulose or derivatives thereof
    • C—CHEMISTRY; METALLURGY
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    • 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
    • C04B28/14—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 calcium sulfate cements
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
    • C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
    • C—CHEMISTRY; METALLURGY
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    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
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    • 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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    • 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
    • C04B41/4598—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 waste materials
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    • C04B7/00—Hydraulic cements
    • C04B7/02—Portland cement
    • C—CHEMISTRY; METALLURGY
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    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/10—Accelerators; Activators
    • C04B2103/14—Hardening accelerators
    • C—CHEMISTRY; METALLURGY
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    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/34—Flow improvers
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    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/44—Thickening, gelling or viscosity increasing agents
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    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/50—Defoamers, air detrainers
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    • 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
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    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/74—Underwater applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Combustion & Propulsion (AREA)
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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to a mortar composition for repair and reinforcement of an underwater concrete structure and a repair and reinforcement method for an underwater concrete structure using the same. More specifically, in repairing and reinforcing the underwater concrete structure, physical strength such as compressive, bending, and tensile strengths of a repairing and reinforcing surface is strengthened. Durability and water resistance are improved by strengthening the bonding strength with a concrete surface, and chemical resistance and waterproof properties are excellent. Moreover, the present invention has excellent resistance to freeze-thawing and salt damage, can maintain a repair and reinforcement effect of the underwater concrete structure for a long time, and can stably complete underwater repair and reinforcement work in a short time, thereby being economical and solving environmental pollution and quality degradation problems caused by material separation. The present invention comprises 100 parts by weight of a binder, 100 to 200 parts by weight of a silica sand, 0.5 to 10 parts by weight of a reinforcing fiber, 10 to 50 parts by weight of a polymer, 0.5 to 2.0 parts by weight of a shrinkage prevention agent, 3 to 7 parts by weight of a silica fume, 0.5 to 10 parts by weight of a clinker, 0.5 to 10 parts by weight of a plaster, 0.5 to 10 parts by weight of an alpha-type hemihydrate gypsum, 0.01 to 5 parts by weight of a fly ash, 0.1 to 5 parts by weight of a red mud, 0.01 to 10 parts by weight of a calcined pozzolana, 0.01 to 10 parts by weight of a microsilica, 0.1 to 1.0 parts by weight of a defoamer, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a thickener mixture.

Description

수중 콘크리트 구조물 보수 보강용 모르타르 조성물 및 이를 이용한 수중 콘크리트 구조물의 보수 보강 공법{Mortar composition for repairing and reinforcing underwater concrete structures, and method of repairing and reinforcing underwater concrete structures using the same}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mortar composition for repairing and reinforcing an underwater concrete structure, and a method of repairing and reinforcing underwater concrete structures using the same,

본 발명은 수중 콘크리트 구조물 보수 보강용 모르타르 조성물 및 이를 이용한 수중 콘크리트 구조물의 보수 보강 공법에 관한 것으로서, 더욱 구체적으로는 수중 콘크리트 구조물을 보수 보강함에 있어 장기 내구성과 콘크리트 구조물과의 부착 강도가 향상되어 보수 보강 효과를 장기간 유지하는 동시에 단시간에 수중 보수 보강 공사를 안정적으로 완료할 수 있어 경제성도 우수하고 재료 분리로 인한 환경 오염 및 품질 저하 문제를 해결할 수 있는 수중 모르타르 조성물을 이용한 수중 콘크리트 구조물의 보수 보강 공법에 관한 것이다. The present invention relates to a mortar composition for repairing and reinforcing an underwater concrete structure, and a repairing and repairing method of an underwater concrete structure using the same. More particularly, the present invention relates to a mortar composition for repairing and reinforcing an underwater concrete structure, Repairing method of underwater concrete structure using an underwater mortar composition which can maintain the reinforcement effect for a long time and can reliably complete underwater repair reinforcement work in a short time, .

철근 콘크리트 구조물은 건설 후 염해나 중성화, 알칼리 골재 반응, 화학적 부식 외에 물의 침투에 의한 강재의 부식 팽창 등으로 구조물이 열화되면서 장기적으로 내구성 및 사용성이 저하된다. 이러한 구조물의 열화가 계속 진행되면 결국 구조물의 붕괴를 초래할 위험성이 있기 때문에 지속적으로 보수하고 관리할 필요가 있다.Reinforced concrete structures are deteriorated in durability and usability in the long term due to deterioration of structures due to salt corrosion, neutralization, alkali aggregate reaction, chemical corrosion as well as corrosion expansion of steel due to penetration of water. As the deterioration of these structures continues, there is a risk that the structure will collapse, so it is necessary to constantly repair and maintain the structures.

구조물 표면의 박리 또는 초기 결함이나 균열의 발생은 열화 요인의 이동을 용이하게 하여 열화의 진행을 촉진시키므로 철근 콘크리트 구조물의 안정성 및 성능 확보를 위해서는 열화 초기에 보수 보강을 실시하여 더 이상의 열화 진행을 억제하고 내구성능을 향상시킬 필요가 있다.Since the detachment of the structure surface or the occurrence of initial defects or cracks facilitates the movement of deterioration factors and promotes the progress of deterioration, it is necessary to repair and reinforce the deterioration progress at the initial stage of deterioration in order to secure the stability and performance of the reinforced concrete structure And it is necessary to improve the durability performance.

따라서 콘크리트의 열화, 강재의 부식, 기타의 원인에 의해 구조물 단면의 박리나 탈락 등의 열화 인자를 포함하는 콘크리트 부분을 제거한 후 단면을 원래의 성능 및 형태로 복원하기 위해 단면 복구 재료를 충진하거나 뿜칠 시공을 하여 보수를 실시하는 것이 일반적이다. Therefore, in order to restore the section to its original performance and shape after removing the concrete part including deterioration factors such as deterioration factor of deterioration such as deterioration of concrete, corrosion of steel and other factors, It is general to carry out repair by construction.

한편, 수중에 존재하는 콘크리트 구조물을 보강하기 위해서는 보수 보강용 모르타르 조성물의 속경성, 수중불분리성 및 고유동성 등의 물성이 추가로 요구된다. 이러한 물성을 만족하기 위한 연구가 지속되고는 있으나, 고강도 무수축성을 가지면서 수중 콘크리트 구조물을 안정적으로 보수 보강할 수 있는 모르타르 조성물은 개발이 더딘 상황이다. On the other hand, in order to reinforce concrete structures existing in water, properties such as quick-hardness, water-separating ability and high fluidity of the mortar composition for repair and reinforcement are further required. Although studies for satisfying these properties are continuing, a mortar composition capable of stably maintaining and reinforcing underwater concrete structures having high strength and no shrinkage has been developed.

종래, 수중에 시공하는 모르타르는 물과 접촉을 최소화하는 방식으로 사용되어 왔으나, 하수 박스나 지하 구조물의 경우 이러한 방식으로도 타설 초기 물과 접촉하는 것을 막을 수 없고 물막이 방식에 한계가 있어 타설 후 재료 분리로 인한 품질 저하 및 환경 오염은 어느 정도 감수해야 하는 것으로 알려져 있는 상황이었다. Conventionally, mortars used in water have been used in a way to minimize contact with water. However, in the case of sewage boxes or underground structures, it is impossible to prevent contact with the initial water in this way, It has been known that quality deterioration due to separation and environmental pollution should be tolerated to some extent.

본 발명은 이러한 종래의 문제점을 해결하기 위해 개발된 기술이다. The present invention is a technique developed to solve such a conventional problem.

[선행기술문헌][Prior Art Literature]

1. 대한민국 등록특허 제10-0639658호1. Korean Patent No. 10-0639658

2. 대한민국 등록특허 제10-1415539호2. Korean Patent No. 10-1415539

3. 대한민국 등록특허 제10-0999354호3. Korean Patent No. 10-0999354

4. 대한민국 등록특허 제10-1489210호4. Korean Patent No. 10-1489210

본 발명은 보수 보강이 필요한 수중 콘크리트 구조물을 보수함에 있어 속경성과 재료 불분리성 및 고유동성의 요구 특성을 유지하면서도 압축 강도 등의 물성을 향상시켜 장기 내구성을 향상시키는 동시에, 콘크리트 구조물면과의 부착 강도를 강화함으로써 보수 보강 효과를 오랜 시간 동안 유지할 수 있도록 하고, 특히 재료의 불분리성이 우수하여 물속에서도 재료분리 저항성, 충진성이 우수함으로써 수직 낙하 타설시에도 재료분리를 일으키지 않으며 수심이 깊은 곳, 침출수가 많은 곳에서도 탁월한 성능을 발휘할 수 있음으로써 연속 타설 시공 및 수질 오염 방지 등 시공성 및 친환경성 등 많은 이점을 갖는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물 및 이를 이용한 수중 콘크리트 구조물의 보수 보강 공법을 제공하고자 한다. The present invention relates to a method of improving the durability of a concrete structure by improving physical properties such as compressive strength while maintaining required properties of quick hardness, material non-separability and high fluidity in repairing a concrete structure underwater requiring repair and reinforcement, It is possible to maintain the maintenance and strengthening effect for a long time by strengthening the adhesion strength. Especially, it is excellent in the non-separability of materials and excellent in material separation resistance and filling property even in water, Mortar composition for repair and reinforcement of underwater concrete structures and many other advantages such as continuous casting and prevention of water pollution by being able to exhibit excellent performance even in places where there is a large amount of leachate, .

상기 과제를 달성하기 위하여 본 발명은In order to achieve the above object,

결합재 100 중량부, 규사 100~200 중량부, 보강섬유 0.5~10 중량부, 폴리머 10 ~ 50 중량부, 수축방지제 0.5~2.0 중량부, 실리카 흄 3~7 중량부, 클링커 0.5 내지 10 중량부, 플라스터 0.5 내지 10 중량부, 알파형 반수석고 0.5 내지 10 중량부, 플라이애쉬 0.01 내지 5 중량부, 레드머드 0.1 내지 5 중량부, 하소포졸라나 0.01 내지 10 중량부, 마이크로실리카 0.01 내지 10 중량부, 소포제 0.1~1.0 중량부, 팽창제 5~10 중량부, 경화촉진제 0.1~10 중량부, 유동화제 0.2~20 중량부 및 증점제 혼합물 2 ~ 20 중량부를 포함하여 구성되는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물로서, 100 to 200 parts by weight of a binder, 0.5 to 10 parts by weight of reinforcing fibers, 10 to 50 parts by weight of a polymer, 0.5 to 2.0 parts by weight of a shrinkage inhibitor, 3 to 7 parts by weight of silica fume, 0.5 to 10 parts by weight of clinker, 0.5 to 10 parts by weight of plaster, 0.5 to 10 parts by weight of alpha type hemihydrate, 0.01 to 5 parts by weight of fly ash, 0.1 to 5 parts by weight of red mud, 0.01 to 10 parts by weight of calcined pomolane, 0.01 to 10 parts by weight of micro silica, 0.1 to 1.0 part by weight of an antifoaming agent, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a mixture of a thickener as a mortar composition ,

상기 결합재는 조강 시멘트 20 ~ 50 중량%, 포틀랜트 시멘트 30 ~ 60 중량% 및 알루미나 시멘트 10 ~ 50 중량%를 포함하여 이루어지며, Wherein the binder comprises 20 to 50 wt% of crude steel cement, 30 to 60 wt% of portland cement, and 10 to 50 wt% of alumina cement,

상기 보강섬유는 폴리프로필렌 섬유, 나일론 섬유 및 아르보셀 섬유의 혼합물로 이루어지고, Wherein the reinforcing fiber is made of a mixture of polypropylene fiber, nylon fiber and arbocell fiber,

상기 폴리머는 EVA(Ethylene-vinyl acetate) 수지와 아크릴계 재유화 수지의 혼합물로 이루어지며, The polymer is made of a mixture of an ethylene-vinyl acetate (EVA) resin and an acrylic resin,

상기 증점제는 셀룰로오스계 증점제 및 아크릴계 증점제의 혼합물로 이루어진 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 제공한다. Wherein the thickener comprises a mixture of a cellulose thickener and an acrylic thickener. The present invention also provides a mortar composition for underwater concrete structure repair and reinforcement.

또한, 상기 과제를 달성하기 위하여 본 발명은In order to achieve the above object,

(1) 결합재 20 ~ 50 중량부, 규사 100~120 중량부, 보강섬유 0.5~2.0 중량부, 폴리머 10 ~ 50 중량부, 수축방지제 0.5~2.0 중량부, 실리카 흄 3~7 중량부, 클링커 0.5 내지 10 중량부, 플라스터 0.5 내지 10 중량부, 알파형 반수석고 0.5 내지 10 중량부, 플라이애쉬 0.01 내지 5 중량부, 레드머드 0.1 내지 5 중량부, 하소포졸라나 0.01 내지 10 중량부, 마이크로실리카 0.01 내지 10 중량부, 소포제 0.1~1.0 중량부, 팽창제 5~10 중량부, 경화촉진제 0.1~10 중량부, 유동화제 0.2~20 중량부 및 증점제 혼합물 2 ~ 20 중량부를 포함하여 구성되는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물로서, 상기 결합재는 조강 시멘트 20 ~ 50 중량%, 포틀랜트 시멘트 30 ~ 60 중량% 및 알루미나 시멘트 10 ~ 50 중량%를 포함하여 이루어지며, 상기 보강섬유는 폴리프로필렌 섬유, 나일론 섬유 및 천연 아르보셀 섬유의 혼합물로 이루어지고, 상기 폴리머는 EVA 수지와 아크릴계 재유화 수지의 혼합물로 이루어지며, 상기 증점제는 셀룰로오스계 증점제 및 아크릴계 증점제의 혼합물로 이루어진 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 제조하는 제1단계;(1) 20 to 50 parts by weight of binders, 100 to 120 parts by weight of silica fibers, 0.5 to 2.0 parts by weight of reinforcing fibers, 10 to 50 parts by weight of polymer, 0.5 to 2.0 parts by weight of shrinkage inhibitor, 3 to 7 parts by weight of silica fume, To 10 parts by weight of plaster, 0.5 to 10 parts by weight of plaster, 0.5 to 10 parts by weight of alpha type hemihydrate, 0.01 to 5 parts by weight of fly ash, 0.1 to 5 parts by weight of red mud, 0.01 to 10 parts by weight of calcined pozzolan, To 10 parts by weight of an antifoaming agent, 0.1 to 1.0 part by weight of an antifoaming agent, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a thickener mixture Wherein the binder comprises 20 to 50% by weight of crude steel cement, 30 to 60% by weight of a portland cement and 10 to 50% by weight of an alumina cement, wherein the reinforcing fiber is a polypropylene fiber, a nylon fiber, Natural arbor Wherein the polymer is a mixture of an EVA resin and an acryl-based re-emulsified resin, and the thickener is a mixture of a cellulose-based thickener and an acrylic thickener, the mortar composition for underwater concrete structure repair and reinforcement ;

(2) 손상된 수중 콘크리트 구조물의 시공 대상면을 치핑하여 손상되지 않은 부분이 나올 때까지 단면을 다듬는 제2단계; 및 (2) a second step of chipping the work surface of the damaged underwater concrete structure and polishing the cross section until an undamaged portion is obtained; And

(3) 상기 다듬어진 시공 대상면에 상기 (1) 단계에서 얻은 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 도포하고 양생시키는 단계;(3) applying and curing the mortar composition for underwater concrete structure repair and reinforcement obtained in the step (1) to the trimmed surface to be applied;

를 포함하는 수중 콘크리트 구조물의 보수 보강 공법을 제공한다. The present invention provides a method of repairing and reinforcing an underwater concrete structure.

본 발명에 따른 수중 콘크리트 구조물 보수 보강용 모르타르 조성물 및 이를 이용한 수중 콘크리트 구조물의 보수 보강 공법에 따르면, 수축 팽창률이 낮아지고 수중에 모르타르를 타설하여 재료가 흩어지지 않으며, 고유동을 나타내는 동시에 고점성을 발휘하여 재료 분리가 억제되어 수중에서의 경화 구조체의 형성이 용이하게 이루어질 수 있다. 또한, 보수 보강 면의 압축 강도, 휨 강도, 인장강도 등 물리적 강도가 강화되며, 콘크리트 면과의 부착 강도가 강화되어 내구성과 내수성이 향상되고, 내화학성 및 방수성도 우수하며, 동경융해 및 염해에 대한 내성도 우수함으로써 수중 콘크리트 구조물의 보수 보강 효과를 장기간 유지할 수 있는 장점이 있다. 또한, 수축성이 낮고 빠른 시간 안에 강도를 발현할 수 있으며, 특히 재료의 불분리성이 우수하여 물속에서도 재료분리 저항성, 충진성이 우수함으로써 수직 낙하 타설시에도 재료분리를 일으키지 않으며 수심이 깊은 곳, 침출수가 많은 곳에서도 탁월한 성능을 발휘할 수 있음으로써 연속 타설 시공 및 수질 오염 방지 등 시공성 및 친환경성 등 많은 이점을 갖는다. According to the mortar composition for underwater concrete structure repair and reinforcement according to the present invention and the repair and reinforcement method of an underwater concrete structure using the same, the shrinkage expansion rate is lowered and the mortar is poured into the water to prevent the material from being scattered. The separation of materials is suppressed and the formation of the cured structure in water can be facilitated. In addition, physical strength such as compressive strength, flexural strength, and tensile strength of the repair and reinforcement surface is strengthened, the adhesion strength with the concrete surface is strengthened, durability and water resistance are improved, chemical resistance and water resistance are excellent, It is also advantageous in that the maintenance and reinforcement effect of the underwater concrete structure can be maintained for a long time due to its excellent resistance to heat. In addition, it has low shrinkability and can exhibit strength in a short time. Especially, since it has excellent non-separating property of materials, it is excellent in material separation resistance and filling property so that material separation does not occur even when a vertical drop is cast. It can exhibit excellent performance even in a place where there are many leachate, and it has many advantages such as continuous casting and prevention of water pollution, workability and environment friendliness.

이하에서는 본 발명에 대하여 더욱 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail.

본 발명에 따른 수중 콘크리트 구조물 보수 보강용 모르타르 조성물은 결합재, 규사, 보강섬유, 폴리머, 수축방지제, 실리카 흄, 클링커, 플라스터, 알파형 반수석고, 플라이애쉬, 레드머드, 하소포졸라나, 마이크로실리카, 소포제, 팽창제, 경화촉진제, 유동화제 및 증점제를 포함하여 구성되는 것을 특징으로 한다.The mortar composition for repairing and reinforcing an underwater concrete structure according to the present invention is characterized in that the mortar composition for repairing and reinforcing an underwater concrete structure is selected from the group consisting of a binder, silica, reinforcing fiber, polymer, shrinkage preventive, silica fume, clinker, plaster, alpha type gypsum, fly ash, An antifoaming agent, an expanding agent, a curing accelerator, a fluidizing agent and a thickening agent.

본 발명에서 상기 결합재는 구체적으로, 일반 포틀랜트 시멘트, 조기 강도가 필요한 경우 조강시멘트나 알루미나 시멘트나 마그네시아 시멘트, 고강도가 요구되는 경우 슬래그 시멘트 등을 사용할 수 있으며, 이들을 단독 또는 혼합하여 사용할 수 있다. In the present invention, the binder may be selected from common portland cement, crude steel cement, alumina cement and magnesia cement when early strength is required, and slag cement when high strength is required. These binders may be used singly or in combination.

본 발명에서 상기 규사는 평균 입경이 0.1~1.2 mm인 세사를 사용하는 것이 바람직하며, 이는 모르타르 조성물의 유동성 및 치밀성을 향상시키기 위함이다. In the present invention, it is preferable that the silica sand having an average particle diameter of 0.1 to 1.2 mm is used to improve the fluidity and compactness of the mortar composition.

본 발명에서 상기 보강섬유는 휨 강도 및 인장 강도를 증진시키고 양생시 표면 크랙을 줄이기 위해 사용되며, 모르타르 시공 후 초기 시공 안정성에 효과적이고 초기 분산성을 높이기 위한 목적으로 사용된다. In the present invention, the reinforcing fiber is used for improving the flexural strength and tensile strength and for reducing surface cracking during curing, and is effective for initial stability after the mortar application and for increasing initial dispersibility.

본 발명에서 상기 보강섬유로는 폴리프로필렌 섬유 20~50 중량%, 나일론 섬유 20~50 중량% 및 아르보셀 섬유 30~60 중량%를 포함하여 이루어진 것을 사용하는 것이 바람직하다. In the present invention, it is preferable to use 20 to 50% by weight of polypropylene fibers, 20 to 50% by weight of nylon fibers and 30 to 60% by weight of arbocell fibers as the reinforcing fibers.

상기 아르보셀 섬유, 더욱 구체적으로는 천연 아르보셀 섬유는 친수성 섬유로서 표면 크랙 발생을 방지하고 강도를 증진시키는 역할을 하며, 폴리프로필렌 섬유 및 나일론 섬유와 혼합 사용시 각 섬유들의 장점을 극대화하여 그 상승효과를 발휘함으로써 강도 증진 및 리바운드량 감소 등의 효과를 볼 수 있다. The above-mentioned Arbocell fiber, more specifically, natural Arbocell fiber is a hydrophilic fiber which prevents surface cracking and enhances the strength, maximizes the advantages of each fiber when mixed with polypropylene fiber and nylon fiber, The effect of improving the strength and reducing the rebound amount can be seen.

본 발명에서 상기 보강 섬유는 조성물 중에 결합재 100 중량부를 기준으로 100~200 중량부의 범위로 사용되는 것이 바람직하다. 상기 함량이 100 중량부 미만이면 인장 강도 및 휨 강도 개선 효과가 미미하며 200 중량부를 초과하면 작업성과 경제성이 나빠질 수 있다. In the present invention, the reinforcing fiber is preferably used in an amount of 100 to 200 parts by weight based on 100 parts by weight of the binder in the composition. When the content is less than 100 parts by weight, the effect of improving the tensile strength and the flexural strength is insignificant. When the content is more than 200 parts by weight, workability and economical efficiency may be deteriorated.

본 발명에서 상기 폴리머는 모르타르 조성물의 경화 전 상태에서는 유동성을 증가시키고 작업성을 개선시키는 역할을 하며, 모르타르 조성물의 경화 후 상태에서는 표면 부착력 증가, 응집력 증가, 굴곡 강도 증가, 굴곡성 증진 및 방수력 증대 등의 효과를 발휘한다. In the present invention, the polymer serves to increase the fluidity and improve the workability of the mortar composition before curing. In the cured state of the mortar composition, the polymer increases surface adhesion, increases cohesion, increases flexural strength, increases water resistance .

본 발명에서 상기 폴리머는 EVA(Ethylene-vinyl acetate) 수지와 아크릴계 재유화 수지의 혼합물을 사용하며, 더욱 구체적으로는 EVA 수지 20~50 중량% 및 아크릴계 재유화 수지 50~80 중량%를 포함하여 이루어진 것을 사용하는 것이 바람직하다. The polymer used in the present invention is a mixture of EVA (ethylene-vinyl acetate) resin and acryl-based re-emulsified resin, more specifically, 20 to 50% by weight of EVA resin and 50 to 80% by weight of acrylic- Is preferably used.

본 발명에서 상기 아크릴계 재유화 수지는 방수 및 접착력을 증가시키며 특수한 제조방법에 의해 제조되는 재유화수지를 사용하는 것이 바람직하다. In the present invention, it is preferable that the acrylic-based re-emulsified resin is water-repellent and re-emulsified by a special manufacturing method.

본 발명에서 상기 아크릴계 재유화 수지는 아크릴계 중합체 80~90중량% 및 가교 가능한 작용기를 가지는 단량체 10~20중량%로 이루어진 전체 단량체 100중량부; 반응성 음이온 유화제 및 비이온 유화제 0.1~5중량부; 중합개시제 0.01~1중량부; 및 물 45~50중량부를 포함하는 프리에멀젼을 중합반응하여 얻어진 아크릴 에멀젼 중합물인 것이 바람직하다. In the present invention, the acryl-based re-emulsified resin is composed of 100 parts by weight of an entire monomer comprising 80 to 90% by weight of an acrylic polymer and 10 to 20% by weight of a monomer having a crosslinkable functional group; 0.1 to 5 parts by weight of a reactive anionic emulsifier and a nonionic emulsifier; 0.01 to 1 part by weight of a polymerization initiator; And 45 to 50 parts by weight of water is preferably a polymer of an acrylic emulsion obtained by polymerizing a pre-emulsion.

더욱, 구체적으로 상기 아크릴계 중합체는 메틸메타아크릴레이트(methyl methacrylate), 에틸 아크릴레이트(ethyl acrylate), 부틸 아크릴레이트(butyl acrylate), 2-에틸헥실아크릴레이트(2-ethylhexylacrylate) 및 2-하이드록시 헥실아크릴레이트(2-hydroxy hexylacrylate), 아크릴로 나이트릴(acrilonitrile), 디메틸아미노에틸메타아크릴레이트(dimethylaminoethylmethacrylate), 아세토아세틱 에틸 메타아크릴레이트(acetoacetoxy ethyl methacrylate), 디비닐벤젠(divinyl benzene), 에틸렌 클리콜 다이메타 아크릴레이트(ethylene glycol dimethacrylate), 부탄디올 다이메타 아크릴레이트(buthanediol dimethacrylate), 싸이클로 헥실 메타아크릴레이트(cyclo hexyl metharylate, 3-클로로-2-하이드록시프로필 메타아크릴레이트(3-chloro-2-hydroxy-propyl methacrylate) 등의 공중합체를 사용할 수 있다.More specifically, the acrylic polymer may be selected from the group consisting of methyl methacrylate, ethyl acrylate, butyl acrylate, 2-ethylhexylacrylate and 2-hydroxyhexyl Acrylate, 2-hydroxyhexylacrylate, acrylonitrile, dimethylaminoethylmethacrylate, acetoacetoxy ethyl methacrylate, divinyl benzene, ethylene glycol, Butylene glycol dimethacrylate, cyclohexyl methacrylate, 3-chloro-2-hydroxypropyl methacrylate, ethylene glycol dimethacrylate, buthanediol dimethacrylate, cyclohexyl methacrylate, hydroxy-propyl methacrylate) may be used.

상기 가교 가능한 작용기를 가지는 단량체는 아크릴계 공중합체와 가교가능한 단량체로서 불포화 카본산인 아크릴산, 메타아크릴산, 이타콘산, 말레인산 중 1종 또는 2종 이상의 혼합물을 사용할 수 있으며, 더욱 구체적으로는 메타크릴옥시프로필트리메톡시실란, 아크릴로 니트릴, 아세토아세틱 에틸 메타아크릴레이트(acetoacetoxy ethyl methacrylate), 디비닐벤젠, 에틸렌 글리콜 다이메타 아크릴레이트(ethylene glycol dimethacrylate), 부탄디올 다이메타 아크릴레이트(buthanediol dimethacrylate), 싸이클로 헥실 메타아크릴레이트(cyclo hexyl metharylate), 3-클로로-2-하이드록시프로필 메타아크릴레이트(3-chloro-2-hydroxypropyl methacrylate, Topolene M) 등의 단량체를 사용할 수 있다.As the monomer having a crosslinkable functional group, acrylic copolymer, acrylic acid, methacrylic acid, itaconic acid, and maleic acid, which are unsaturated carboxylic acids, can be used as a crosslinkable monomer, and mixtures of two or more of these may be used. More specific examples thereof include methacryloxypropyl tri But are not limited to, methoxysilane, acrylonitrile, acetoacetoxy ethyl methacrylate, divinylbenzene, ethylene glycol dimethacrylate, buthanediol dimethacrylate, cyclohexylmethacrylate, Monomers such as cyclohexyl methacrylate and 3-chloro-2-hydroxypropyl methacrylate (Topolene M) can be used.

상기 반응성 음이온 유화제는 폴리옥시에틸렌 노닐페닐 에테르황산암모늄을 사용할 수 있으며, 비이온 유화제로는 알킬폴리에톡시 아크릴레이트(alkyl polyethoxy acrylate), 알킬폴리에톡시 메타크릴레이트(alkyl polyethoxy methacrylate), 아릴폴리에톡시 아크릴레이트(aryl polyethoxy acrylate), 아릴폴리에톡시 메타크릴레이트(aryl polyethoxy methacrylate) 등을 사용할 수 있다.The reactive anionic emulsifier may be polyoxyethylene nonylphenyl ether ammonium sulfate. Examples of the nonionic emulsifier include alkyl polyethoxy acrylate, alkyl polyethoxy methacrylate, Aryl polyethoxy acrylate, aryl polyethoxy methacrylate, and the like can be used.

상기 중합개시제는 과황산암모늄(ammonium persulphate, APS), 과황산칼륨(potassium persulfate, KPS), 과황산나트륨(sodium persulfate, SPS), 술포키실산염, t-부틸히드로퍼옥사이드 등을 사용할 수 있다.The polymerization initiator may be ammonium persulphate (APS), potassium persulfate (KPS), sodium persulfate (SPS), sulfoxylate, t-butyl hydroperoxide, or the like.

상기 아크릴계 재유화 수지는 아크릴계 중합체 80~90중량% 및 가교 가능한 작용기를 가지는 단량체 10~20중량%로 이루어진 전체 단량체 100중량부; 반응성 음이온 유화제 및 비이온 유화제 0.1~5중량부; 중합개시제 0.01~1중량부; 및 물 45~50중량부를 포함하는 프리에멀젼을 중합반응하여 얻어진 아크릴 에멀젼 중합물인 것이 바람직하다. 100 parts by weight of the total monomer consisting of 80 to 90% by weight of an acryl-based polymer and 10 to 20% by weight of a monomer having a crosslinkable functional group; 0.1 to 5 parts by weight of a reactive anionic emulsifier and a nonionic emulsifier; 0.01 to 1 part by weight of a polymerization initiator; And 45 to 50 parts by weight of water is preferably a polymer of an acrylic emulsion obtained by polymerizing a pre-emulsion.

상기 아크릴계 재유화 수지는 반응성 음이온 유화제 및 비이온 유화제를 아크릴계 공중합체 및 가교 가능한 작용기를 가지는 단량체 및 물과 혼합하여 프리 에멀젼 상태로 제조한 후 온도는 약 70~90℃로 유지하면서 상기 프리에멀젼 중 최대 약 10 중량% 정도를 초기 중합 반응시킨다. 이어서 반응물에 잔량의 프리에멀젼과 중합개시제를 약 5~10 시간에 걸쳐 투여하여 연속 중합 반응시킨 후 약 30~90 분 동안 숙성시킨다. 이후 약 60℃ 정도에서 후반응을 거친 후 냉각함으로써 아크릴계 재유화 수지를 제조할 수 있다. The acryl-based re-emulsified resin is prepared by mixing a reactive anionic emulsifier and a nonionic emulsifier with a monomer having an acrylic copolymer and a crosslinkable functional group and water to prepare a pre-emulsion state, and while maintaining the temperature at about 70 to 90 ° C, Up to about 10% by weight is subjected to initial polymerization reaction. Subsequently, the remaining pre-emulsion and the polymerization initiator are added to the reaction product over a period of about 5 to 10 hours, followed by continuous polymerization, followed by aging for about 30 to 90 minutes. After that, the resin is post-reacted at about 60 캜 and then cooled to obtain an acryl-based re-emulsified resin.

본 발명에서 상기 폴리머 성분은 고형분 45~52%, pH 8.0~9.5, 점도 200~2000cps인 것이 바람직하다.In the present invention, the polymer component preferably has a solid content of 45 to 52%, a pH of 8.0 to 9.5, and a viscosity of 200 to 2000 cps.

본 발명에서 상기 폴리머는 EVA 수지와 특수 아크릴계 재유화수지의 혼합물 형태를 사용함으로써 작업성과 내수성이 개선되고 휨강도, 인장강도 및 부착강도, 건조수축 저항성, 기계적 물성이 향상되며, 내약품성, 동결융해 저항성을 포함하는 내구성을 극대화하는 동시에 경제성을 확보할 수 있다. The polymer of the present invention improves workability and water resistance by using a mixture of an EVA resin and a special acryl-based re-emulsified resin, and has improved bending strength, tensile strength and adhesion strength, drying shrinkage resistance and mechanical properties, It is possible to maximize durability including economical efficiency.

본 발명에서 상기 수축 방지제는 네오펜틸글리콜(Neopentyl glycol)을 사용하는 것이 바람직하다. 상기 네오펜틸글리콜은 대칭형의 2개의 알코올기와 알파 카본 위치에 2개의 메틸기를 가지고 있어 에스테르화 반응에 탁월한 반응성을 보여준다. 본 발명에서 상기 네오펜틸글리콜은 백색 결정체 100%로 이루어진 플레이크(flake) 형태 또는 네오펜틸글리콜 90% 및 물 10%로 이루어진 슬러리(slurry) 형태로 사용될 수 있다. In the present invention, neopentyl glycol is preferably used as the shrinkage inhibitor. The neopentyl glycol has two alcohol groups symmetrically and two methyl groups at the alpha carbon position, thus showing excellent reactivity to the esterification reaction. In the present invention, the neopentyl glycol may be used in the form of a flake consisting of 100% white crystals or a slurry composed of 90% neopentyl glycol and 10% water.

본 발명에서 상기 실리카 흄(Silica fume)은 평균 입경 0.1~0.5 mm 정도로 이루어진 완전 구형에 가까운 입자로서 비정질의 활성 실리카이며, 아래의 화학식에서와 같이 수산화칼슘과 반응하여 상온에서 함수 규산 칼슘으로 변화함으로써 수퍼 포졸란 성질을 띤다. In the present invention, the silica fume is an amorphous activated silica having an average particle size of about 0.1 to 0.5 mm and is an amorphous active silica. The silica fume reacts with calcium hydroxide at a room temperature to convert it into calcium hydrate, Pozzolanic properties.

3CaOSiO2 + H2O → C-S-H(시멘트겔) + Ca(OH)2 3CaOSiO 2 + H 2 O → CSH (cement gel) + Ca (OH) 2

본 발명에서 상기 모르타르 조성물에 상기 실리카 흄을 첨가하는 이유는, 구상 입자에 의한 볼 베어링 효과로 분산성 및 감수 효과를 향상시키고 시멘트 입자 사이에 실리카 흄의 충전 효과로 수밀성 향상 및 고강도화, 그리고 숏크리트의 부착성 향상으로 그라운드량 감소, 알칼리 실리카 반응 억제 및 화학적 저항성 향상 등의 효과가 있기 때문이다. The reason for adding the silica fume to the mortar composition in the present invention is to improve the dispersibility and water reducing effect by the ball bearing effect by the spherical particles and improve the watertightness and strength of the shotcrete due to the charging effect of silica fume between the cement particles, This is because an improvement in adhesion improves the reduction of the ground amount, the inhibition of the reaction of the alkali silica, and the improvement of the chemical resistance.

또한, 본 발명에서 상기 클링커(clinker)는 규산칼슘인 알라이트, 베라이트 및 세라이트 등으로 구성된다. 상기 클링커는 결합제와 물의 혼합을 촉진시키는 역할을 한다. 상기 클링커는 상기 모르타르 조성물 중에 0.5 중량부 내지 10 중량부의 범위로 포함되는 것이 바람직한데, 상기 클링커의 함량이 0.5 중량부 미만인 경우는 결합제와 물의 혼합이 용이하지 않으며, 10 중량부를 초과하는 경우는 강도가 저하되는 문제가 있다.In the present invention, the clinker is composed of calcium silicate, alite, berylite, celite, and the like. The clinker serves to promote the mixing of the binder and water. If the content of the clinker is less than 0.5 part by weight, mixing of the binder with water is not easy. When the amount of the clinker is more than 10 parts by weight, the strength of the clinker may be in the range of 0.5 to 10 parts by weight, Is lowered.

또한, 본 발명에서 상기 플라스터(plaster)는 결합제에 포함된 성분이 물과 용이하게 혼합되도록 하는 역할을 한다. 상기 플라스터는 상기 모르타르 조성물 중에 0.5 중량부 내지 10 중량부의 범위로 포함되는 것이 바람직한데, 따라서, 상기 플라스터의 함량이 0.5 중량부 미만인 경우는 결합제에 포함된 다양한 성분이 물과 용이하게 혼합되기 어려운 문제가 있고, 10 중량부를 초과하는 경우는 강도 및 내화학성 등이 저하되는 문제가 있다.In addition, the plaster in the present invention plays a role of allowing components contained in the binder to be easily mixed with water. It is preferable that the plaster is contained in the mortar composition in the range of 0.5 to 10 parts by weight. Therefore, when the content of the plaster is less than 0.5 parts by weight, various components contained in the binder may not easily mix with water And if it exceeds 10 parts by weight, the strength and chemical resistance are deteriorated.

또한, 본 발명에서 상기 알파형 반수석고는 이수석고를 -600 토르(torr) 이상의 감압 하에 약 75~100℃의 온도로 1시간 이상 가열하여 얻어진 것으로서, 감압 가열에 의해 알파형 반수석고로 제조되며 상기 알파형 반수석고는 수축 팽창율이 거의 제로에 가까운 성능을 발휘하며, 수축 팽창에 의한 균열을 억제하는 효과가 있다. 더욱 구체적으로 설명하면, 일반적으로 석고는 크게 천연석고와 화학석고로 나뉘는데, 보통 SO3의 함량에 따라 순도가 결정되며 석고에 들어있는 결정수의 함량에 따라 이수석고, 반수석고, 무수석고로 구분된다. 이수석고는 탈수조건에 따라 알파형, 베타형 또는 무수석고로 전이되는데 건조한 상태에서 탈수가 이루어지는 경우에는 베타형으로, 습식상태에서 탈수되는 경우에는 알파형으로 전이된다. 알파형 반수석고는 베타형 반수석고에 비하여 강도가 10배 이상 뛰어나고 초기 경화시간이 짧으며 수축 팽창에 따른 균열을 억제하는 효과가 있다. 또한, 알파형 반수석고는 후술하는 CSA계 팽창제와 함께 고강도, 급결 및 팽창성을 강화하는 역할을 하며, CSA계 팽창제의 단점을 보완하는 역할을 한다. Further, in the present invention, the alpha-hemihydrate gypsum is obtained by heating an alum-type gypsum at a temperature of about 75 to 100 DEG C under a reduced pressure of -600 torr or more for 1 hour or more, The alpha type hemihydrate gypsum exhibits almost zero shrinkage expansion rate, and has an effect of suppressing cracks due to shrinkage expansion. More specifically, in general, gypsum is largely classified into natural gypsum and chemical gypsum. The purity is determined according to the content of SO 3 , and the gypsum gypsum is divided into the gypsum gypsum, half gypsum and anhydrous gypsum do. It is transformed into alpha type, beta type or anhydrous gypsum depending on the dehydration condition. It is transformed into beta type when dehydrated in a dry state, and alpha type when dehydrated in a wet state. Alpha-type hemihydrate gypsum has more than 10 times more strength than beta-type hemihydrate gypsum, has a short initial curing time, and has the effect of suppressing cracks due to expansion and shrinkage. In addition, the alpha-type hemihydrate gypsum plays a role of strengthening the high strength, quickness and expandability together with the CSA type expanding agent described later, and it plays a role of supplementing the disadvantage of the CSA type expanding agent.

본 발명에서 상기 알파형 반수석고는 상기 모르타르 조성물 중에 0.5 중량부 내지 10 중량부의 범위로 포함되는 것이 바람직한데, 상기 알파형 반수석고의 함량이 0.5 중량부 미만인 경우는 균열에 대한 저항성이 저하되며, 10 중량부를 초과하는 경우는 반응속도가 빨라져서 가사시간이 짧아지므로 작업성이 떨어지는 문제가 있다.In the present invention, it is preferable that the alpha-hemihydrate gypsum is contained in the mortar composition in the range of 0.5 to 10 parts by weight. When the content of the alpha-hemihydrate gypsum is less than 0.5 part by weight, When the amount is more than 10 parts by weight, the reaction speed is increased, and the pot life is shortened.

또한, 본 발명에서 상기 플라이애쉬(fly ash)는 화력발전소 등 석탄을 연료로 사용하는 시설에서 석탄을 태우고 남은 성분들이 산화물 형태로 남아 산화 실리콘(SiO2)나 산화 알루미늄(Al2O3) 성분의 미세한 먼지로 남은 것을 의미한다. 상기 플라이애쉬를 혼합하여 사용하면 작업성이 개선되고 경화열이 낮아질 뿐만 아니라 장기적인 강도 및 수밀성이 향상되어 경제적이다. 상기 플라이애쉬는 상기 모르타르 조성물 중에 0.01 중량부 내지 5 중량부의 범위로 포함되는 것이 바람직한데, 상기 플라이애쉬의 함량이 0.01 미만인 경우는 보수 보강제의 부착성능이 저하되며, 5 중량부를 초과하는 경우는 내화학성이 저하되는 문제가 있다. In addition, in the present invention, the fly ash is produced by burning coal in a facility using coal as a fuel, such as a thermal power plant, so that the remaining components remain in the form of oxide to form silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ) Which means that the dust remains as fine dust. When the fly ash is mixed and used, workability is improved, curing heat is lowered, and long-term strength and water tightness are improved, which is economical. It is preferable that the fly ash is contained in the mortar composition in the range of 0.01 to 5 parts by weight. When the content of the fly ash is less than 0.01, the performance of the maintenance reinforcing agent is deteriorated. When the fly ash content exceeds 5 parts by weight, There is a problem that chemical properties are deteriorated.

또한, 본 발명에서 상기 레드머드는 본 발명에 따른 보수 보강제의 초기 강도를 높이는 역할을 하며, 주요 구성 성분으로는 SiO2와 Al2O3를 포함하고 미량의 Fe2O3, MgO, Na2O 등을 포함한다. 본 발명에서 상기 레드머드는 상기 모르타르 조성물 중에 0.1 중량부 내지 5 중량부의 범위로 포함되는 것이 바람직한데, 상기 함량이 0.1 중량부 미만인 경우는 보수 보강제의 초기 강도 향상 효과가 저하되며, 5 중량부를 초과하는 경우는 강도 향상 효과가 더 이상 증대되지 않는다. In the present invention, the red mud serves to increase the initial strength of the maintenance reinforcing agent according to the present invention, and includes SiO 2 and Al 2 O 3 as major constituents, and trace amounts of Fe 2 O 3 , MgO, Na 2 O, and the like. In the present invention, it is preferable that the red mud is contained in the mortar composition in the range of 0.1 to 5 parts by weight. If the content is less than 0.1 part by weight, the effect of improving the initial strength of the repair reinforcing agent is deteriorated, The strength improvement effect is not further increased.

또한, 본 발명에서 상기 하소포졸라나(calcinated pozzolana)는 주로 세립인 적색의 화산성 흙으로 구성되어 있는 천연 포졸라나에 칼슘을 첨가하여 제조하며, 본 발명에 따른 보수보강제의 방수성을 향상시키는 역할을 한다. 구체적으로 상기 하소포롤라나는 천연 포졸라나 100 중량부에 칼슘 1~20 중량부를 혼합한 혼합물을 1000~1200℃에서 0.5~1 시간 동안 소성한 후 평균입도가 10~20 μm가 되도록 분쇄한 것을 사용하는 것이 바람직하다. 상기와 같이 처리된 하소포졸라나는 모르타르에 적용시 조직의 치밀성을 향상시켜 방수성 및 강도를 증가시키는 역할을 한다. 상기 하소포졸라나는 상기 모르타르 조성물 중에 0.01 중량부 내지 10 중량부의 범위로 포함되는 것이 바람직한데, 상기 하소포졸라나의 함량이 0.01 중량부 미만인 경우는 보수 보강제의 방수성이 저하되며, 10 중량부를 초과하는 경우는 보수 보강제의 강도가 저하되는 문제가 있다.In the present invention, the calcined pozzolana is prepared by adding calcium to natural pozzolana, which is mainly composed of fine-grained red, volatile acid earth, and serves to improve the water resistance of the repair or reinforcing agent according to the present invention do. Specifically, a mixture obtained by mixing 100 parts by weight of natural povolacne with 1 to 20 parts by weight of calcium is calcined at 1000 to 1200 ° C. for 0.5 to 1 hour and then pulverized to have an average particle size of 10 to 20 μm . When the above-mentioned treated soapollane is applied to the mortar, it enhances the denseness of the tissue to increase water resistance and strength. It is preferable that the lower phospololane is contained in the mortar composition in the range of 0.01 to 10 parts by weight. When the content of the lower phospololane is less than 0.01 part by weight, the water repellency of the maintenance reinforcing agent is lowered, There is a problem that the strength of the maintenance reinforcing agent is lowered.

또한, 본 발명에서 상기 마이크로실리카는 10 내지 200㎛의 입경을 갖는 실리카 입자이며, 본 발명에 따른 보수 보강제의 강도 및 내화학성을 향상시키는 역할을 한다. 상기 마이크로실리카는 상기 모르타르 조성물 중에 0.01 중량부 내지 10 중량부의 범위로 포함되는 것이 바람직한데, 상기 마이크로실리카의 함량이 0.01 중량부 미만이면 보수 보강제의 강도 및 내화학성이 저하되며, 10 중량부를 초과하는 경우는 보수 보강제의 부착성능이 저하되는 문제가 있다. Also, in the present invention, the micro silica is a silica particle having a particle diameter of 10 to 200 탆 and serves to improve the strength and chemical resistance of the repair or reinforcing agent according to the present invention. The content of the microsilica in the mortar composition is preferably in the range of 0.01 to 10 parts by weight. When the content of the microsilica is less than 0.01 parts by weight, the strength and chemical resistance of the repair improver are lowered. When the content of the microsilica exceeds 10 parts by weight There is a problem that the adhesion performance of the maintenance reinforcing agent is deteriorated.

본 발명에서 상기 소포제는 모르타르 내의 거대 기공을 제거하여 모르타르의 강도와 외관을 좋게 하기 위하여 사용되는 성분으로, 일반적으로 휘발성이 적고 확산력이 큰 기름상의 물질 또는 수용성이 계면활성제가 이용되며, 예로는 고급알콜류, 인산에스테르계, 실리콘계, 비수용성 알콜류 등을 사용할 수 있다. In the present invention, the defoaming agent is a component used for removing macropores in the mortar to improve the strength and appearance of the mortar. In general, an oil-like substance or a water-soluble surfactant having low volatility and high diffusing power is used, Alcohols, phosphoric acid esters, silicones, non-water-soluble alcohols and the like.

더욱 구체적인 예로서는, 등유, 유동 파라핀 등과 같은 광유계 소포제; 동식물유, 참기름, 피마자유와 이들의 알킬렌옥사이드 부가물 등과 같은 유지계 소포제; 올레인산, 스테아린산과 이들의 알킬렌옥사이드 부가물 등과 같은 지방산계 소포제; 글리세린모노리시놀레이트, 알케닐호박산 유동체, 솔비톨모노라울레이트, 솔비톨트리올레이트, 천연 왁스 등과 같은 지방산 에스테르계 소포제; 폴리옥시알킬렌류, (폴리)옥시알킬에테르류, 아세틸렌에테르류, (폴리)옥시알킬렌지방산에스테르류, (폴리)옥시알킬렌솔비탄지방산에스테르류, (폴리)옥시알킬렌알킬(아릴)에테르황산에스테르염류, (폴리)옥시알킬렌알킬인산에스테르류, (폴리)옥시알킬렌알킬아민류, (폴리)옥시알킬렌아미드 등과 같은 옥시알킬렌계 소포제; 옥틸알콜, 헥사데실알콜, 아세틸렌알콜, 글리콜류 등과 같은 알콜계 소포제; 아크릴레이트폴리아민 등과 같은 아미드계 소포제; 인산트리부틸, 나트륨옥틸포스페이트 등과 같은 인산에스테르계 소포제; 알루미늄스테아레이트, 칼슘올레이트 등과 같은 금속비누계 소포제; 디메틸실리콘유, 실리콘 페이스트, 실리콘 에멀젼, 유기변성폴리실록산(디메틸폴리실록산 등의 폴리오르가노실록산), 플루오로실리콘유 등과 같은 실리콘계 소포제를 사용할 수 있다. More specific examples include mineral oil defoaming agents such as kerosene and liquid paraffin; Retentive defoamers such as animal and vegetable oils, sesame oil, castor oil and their alkylene oxide adducts; Fatty acid defoaming agents such as oleic acid, stearic acid and alkylene oxide adducts thereof; Fatty acid ester defoaming agents such as glycerin monoricinolate, alkenyl succinic acid liquid, sorbitol monolaurate, sorbitol trioleate, natural wax and the like; (Poly) oxyalkylene sorbitan fatty acid esters, (poly) oxyalkylene alkyl (aryl) ethers, polyoxyalkylene polyoxyalkylene ethers, polyoxyalkylene ethers, acetylene ethers, Oxyalkylene antifoaming agents such as sulfuric acid ester salts, (poly) oxyalkylene alkyl phosphoric acid esters, (poly) oxyalkylene alkylamines and (poly) oxyalkylene amides; Alcohol-based antifoaming agents such as octyl alcohol, hexadecyl alcohol, acetylene alcohol, glycols and the like; Amide-based antifoaming agents such as acrylate polyamines and the like; Phosphoric acid ester antifoaming agents such as tributyl phosphate, sodium octyl phosphate and the like; Metal soap defoamers such as aluminum stearate, calcium oleate and the like; Silicone antifoaming agents such as dimethyl silicone oil, silicone paste, silicone emulsion, organic modified polysiloxane (polyorganosiloxane such as dimethyl polysiloxane), fluorosilicone oil and the like can be used.

본 발명에서 상기 팽창제는 칼슘 설포알루미네이트(CSA)와 석고가 4~9 : 1~6의 중량비로 혼합하여 제조한 것을 사용할 수 있으며, 상기 석고는 인산 무수석고 또는 불산 무수석고 중에서 선택하여 사용할 수 있다. In the present invention, the swelling agent may be a mixture of calcium sulfoaluminate (CSA) and gypsum in a weight ratio of 4 to 9: 1 to 6, and the gypsum may be selected from anhydrous gypsum phosphate or anhydrous gypsum have.

본 발명에서 상기 경화촉진제는 모르타르의 경화를 촉진하여 초기 강도를 발현토록 하는 것으로서, 예를 들어 염화칼슘, 규산나트륨, 규산칼슘, 황산나트륨, 황산칼슘, 염화리튬 및 황산리튬 중에서 선택된 1종 또는 2종 이상의 혼합물을 사용할 수 있다. In the present invention, the curing accelerator promotes the hardening of the mortar to exhibit the initial strength. Examples of the curing accelerator include one or more selected from calcium chloride, sodium silicate, calcium silicate, sodium sulfate, calcium sulfate, lithium chloride and lithium sulfate Mixtures may be used.

본 발명에서 상기 유동화제는 모르타르의 입자 표면에 흡착하여 입자 표면에 전하를 주어 입자들끼리 상호 반력을 일으키므로, 응집된 입자를 분산시켜 유동을 증가시켜 감수 효과로 인한 강도 증진이 가능하게 하는 역할을 한다. 상기 유동화제로서는 예를 들어 멜라민셀폰산계, 나프탈렌셀폰산계, 폴리카본산계, 리그닌슬폰산계 또는 알킬아릴슬폰산계 유동화제를 사용할 수 있으며, 더욱 구체적으로는 리그닌술포네이트, 폴리나프탈렌술포네이트, 폴리멜라민술포네이트 또는 폴리카복실레이트계 감수제로 이루어진 군으로부터 단독 또는 둘 이상 혼합 사용이 가능하다. In the present invention, the fluidizing agent is adsorbed on the surface of the mortar so as to impart charge to the surface of the particles, causing the particles to mutually react with each other, thereby increasing the flow by dispersing the aggregated particles, . As the fluidizing agent, for example, melamine cellphonic acid type, naphthalene cellphonic acid type, polycarbonic acid type, lignin sulfonic acid type or alkylarylsulfonic acid type fluidizing agent can be used, and more specifically, ligninsulfonate, polynaphthalenesulfonate, Or a polycarboxylate-based water reducing agent, may be used singly or in combination of two or more thereof.

특히, 상기 유동화제 사용시 응결시간에 영향을 주므로 응결시간 조절제를 적절히 포함하여 사용할 수 있다. Particularly, since the effect of the fluidizing agent on the coagulation time is affected, a coagulation time adjusting agent can be appropriately used.

또한, 상기와 같은 조성으로 얻어지는 모르타르 조성물에 필요에 따라 지연제 0.01 ~ 1.0 중량부, 알칼리활성화제 0.1 ~ 1.0 중량부에서 선택되는 1종 이상의 첨가제를 더 포함하여 구성될 수 있다. The mortar composition obtained by the above composition may further comprise at least one additive selected from the group consisting of a retarder and an alkali activator in an amount of 0.01 to 1.0 part by weight and 0.1 to 1.0 part by weight, respectively.

상기 지연제는 모르타르의 수화속도를 조정하여 일정기간 작업성을 확보할 목적으로 첨가될 수 있다. 지연제로는 붕산과 붕사, 붕산나트륨, 붕산칼륨과 같은 붕산염류, 글루콘산, 시트릭산, 타르타르산, 글루코헵톤산, 아라본산, 사과산 또는 구연산 및 이들의 나트륨, 칼륨, 칼슘, 마그네슘, 암모늄, 트리에탄올아민 등의 무기염 또는 유기염 등의 옥시카복실산; 글루코오스, 프럭토오스, 갈락토오스, 사카로오스, 크실로오스, 아비토오스, 리포오즈, 이성화당 등의 단당류나, 2당, 3당 등의 올리고당, 또는 덱스트린 등의 올리고당, 또는 덱스트란 등의 다당류, 이들을 포함하는 당밀류 등의 당류; 솔비톨 등의 당알콜; 규불화 마그네슘; 인산 및 그의 염 또는 붕산 에스테르류; 아미노카복실산과 그의 염; 알칼리 가용 단백질; 푸민산; 탄닌산; 페놀; 글리세린 등의 다가알콜; 아미노트리(메틸렌포폰산), 1-히드록시에틸리덴-1,1-디포스폰산, 에틸렌디아민테트라(메틸렌포스폰산), 디에틸렌트리아민펜타(메틸렌포스폰산) 및 이들의 알칼리 금속염, 알칼리토류 금속염 등의 포스폰산 및 그 유도체 등을 사용할 수 있다. 그 함량은 상기 시멘트 100 중량부를 기준으로 0.01 ~ 1.0 중량부를 첨가하는 것이 바람직하다.The retarder may be added for the purpose of ensuring workability for a certain period of time by adjusting the hydration rate of the mortar. Examples of the delaying agent include boric acid salts such as boric acid and borax, boric acid salts such as sodium borate and potassium borate, gluconic acid, citric acid, tartaric acid, glucoheptonic acid, arabic acid, malic acid or citric acid and sodium, potassium, calcium, magnesium, An oxycarboxylic acid such as an inorganic salt or an organic salt; There may be mentioned monosaccharides such as glucose, fructose, galactose, saccharose, xylose, avitose, lipoose and isomerized sugar, oligosaccharides such as 2 sugars and 3 sugars, oligosaccharides such as dextrin, polysaccharides such as dextran, Saccharides such as molasses and the like containing them; Sugar alcohols such as sorbitol; Magnesium styrenesulfonate; Phosphoric acid and its salts or boric acid esters; Aminocarboxylic acids and their salts; Alkali-soluble proteins; Fumic acid; Tannic acid; phenol; Polyhydric alcohols such as glycerin; Aminotri (methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediamine tetra (methylenephosphonic acid), diethylenetriamine penta (methylenephosphonic acid) and their alkali metal salts, And phosphonic acid and derivatives thereof such as earth metal salts. The content thereof is preferably 0.01 to 1.0 part by weight based on 100 parts by weight of the cement.

상기 알칼리활성화제는 강도 발현에 영향을 미치는 성분으로, 알칼리 금속수산화물, 염화물, 황산화물 및 탄산화물에서 선택되는 하나 또는 둘 이상의 혼합물을 사용할 수 있고, 바람직하게는 탄산나트륨 및 탄산수소나타륨을 사용하는 것이 강도 발현 측면에서 유리하다. 본 발명에서 상기 알칼리활성화제의 함량은 상기 시멘트 100 중량부를 기준으로 0.1~1.0 중량부를 첨가하는 것이 바람직하다. The alkali activating agent may be one or a mixture of two or more selected from among alkali metal hydroxides, chlorides, sulfur oxides and carbonates, and preferably sodium carbonate and sodium hydrogencarbonate Which is advantageous in terms of strength development. In the present invention, the content of the alkali activator is preferably 0.1 to 1.0 part by weight based on 100 parts by weight of the cement.

또한, 본 발명에서 상기 증점제는 수중에서 모르타르 조성물의 점성을 향상시켜 분해되는 것을 방지하기 위하여 첨가되는 것으로, 셀룰로오스계 증점제 및 아크릴계 증점제의 혼합물을 사용하는 것이 바람직하며, 구체적으로는 셀룰로오스계 증점제 10~50 중량% 및 아크릴계 증점제 50~90 중량%를 혼합하여 사용하는 것이 바람직하다. In the present invention, the thickener is added in order to prevent the degradation of the mortar composition by improving the viscosity of the mortar composition. It is preferable to use a mixture of a cellulose thickener and an acrylic thickener. Specifically, 50% by weight of an acrylic thickener and 50 to 90% by weight of an acrylic thickener.

상기 셀룰로오스계 증점제는 다당류 폴리머의 일종이며, 원료인 펄프의 중합도에 따라 증점제의 중합도 및 점도가 결정되며 이러한 분자량, 치환율, 점도에 따라 특성이 다르게 나타난다. 따라서 한 가지 종류의 증점제로 사용하기 보다는 적절한 점도값을 갖는 증점제를 병용 선택하여 사용토록 하는 것이 바람직The cellulose-based thickener is a kind of polysaccharide polymer, and the polymerization degree and viscosity of the thickener are determined according to the degree of polymerization of the pulp as a raw material, and the properties are different depending on the molecular weight, substitution rate and viscosity. Therefore, it is preferable to use a thickener having an appropriate viscosity value in combination, rather than as a kind of thickener

하다. 구체적으로는 메틸계 셀룰로오스, 에틸계 셀룰로오스, 프로필계 셀룰로오스 중에서 선택되는 것을 사용할 수 있으며, 더욱 구체적인 예로서는 메틸셀룰로오스, 히드록시메틸셀룰로오스, 카복시메틸셀룰로오스와 같은 메틸계 셀룰로오스; 에틸셀룰로오스, 히드록시에틸셀룰로오스, 카복시에틸셀룰로오스와 같은 에틸계 셀룰로오스; 히드록시프로필셀룰로오스와 같은 프로필계 셀룰로오스에서 선택되는 셀룰로오스계 증점제를 사용할 수 있다. Do. Specifically, Methyl cellulose, ethyl cellulose, and propyl cellulose; and more specific examples thereof include methyl cellulose such as methyl cellulose, hydroxymethyl cellulose and carboxymethyl cellulose; Ethyl celluloses such as ethyl cellulose, hydroxyethyl cellulose and carboxyethyl cellulose; Cellulose type thickeners selected from propyl cellulose such as hydroxypropyl cellulose can be used.

상기 아크릴계 증점제는 주로 폴리아크릴아마이드가 주성분이고 응결 지연성이 적고 기포발생이 적은 장점이 있으나 시간경과에 따라 작업성이 현저하게 떨어지는 단점이 있으므로 이러한 단점을 해결하기 위하여 셀룰로오스계와 아크릴계를 적절히 혼합하여 사용하는 것이 바람직하다.The acrylic thickener mainly has polyacrylamide as a main component, has less retardation of coagulation and less bubbles, but has a disadvantage in that the workability is remarkably lowered with time. Therefore, in order to solve such disadvantages, a cellulose- Is preferably used.

상기 아크릴계 증점제의 구체적인 예로는 폴리아크릴아미드, 아크릴산 소다, 폴리에틸렌 옥사이드 및 아크릴아미드와 아크릴산 소다의 공중합체 중에서 선택되는 1종 또는 2종 이상의 혼합물을 사용할 수 있다. Specific examples of the acrylic thickener include polyacrylamide, sodium acrylate, polyethylene oxide, and copolymers of acrylamide and sodium acrylate, or a mixture of two or more thereof.

또한, 본 발명에 따른 상기 수중 콘크리트 구조물 보수 보강용 모르타르 조성물은 그 물리적 성능 강화를 위해 천연석 분말을 더 포함할 수 있다. In addition, the mortar composition for repair and reinforcement of underwater concrete structures according to the present invention may further include natural stone powder for enhancing its physical performance.

상기 천연석 분말은 운모, 제올라이트 및 벤토나이트의 혼합물을 사용하며 그 함량은 상기 시멘트 100 중량부에 대하여 0.1 ~ 5 중량부로 사용되는 것이 바람직하다. 더욱 바람직하게는, 상기 천연석 분말은 운모, 제올라이트 및 벤토나이트의 3종 혼합물로 이루어지는 것이 좋으며 분말의 크기는 0.01~10 ㎛ 범위에 드는 것을 사용하는 것이 좋고, 각각의 혼합 비율은 30~60:20~50:20~50의 중량비로 혼합되는 것이 바람직하다. The natural stone powder is preferably a mixture of mica, zeolite and bentonite, and the content thereof is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the cement. More preferably, the natural stone powder is composed of a mixture of three kinds of mica, zeolite and bentonite. It is preferable to use a powder having a size in the range of 0.01 to 10 μm and a mixing ratio of 30 to 60:20, 50: 20 to 50 by weight.

상기 운모, 제올라이트 및 벤토나이트는 다공성 물질로서 탈취성, 항균성, 항곰팡이성이 우수하고 유익한 미생물과 효소를 가지고 있어 시멘트 특유의 냄새와 알칼리성 물질을 차단할 수 있고 시멘트의 독성을 분해 제거하는 기능을 갖는다. 이와 같은 천연석 분말은 모르타르 조성물이 경화되는 과정에서 보강섬유 및 폴리비닐알콜 분말 수지와 시멘트 및 규사 성분 간을 강력하게 결합하고 조직을 이루는 각 구성 성분 간의 강력한 접착력과 침투에 의한 결착력이 발휘되어 조직이 치밀해지도록 하는 역할을 한다. 따라서 상기 천연석 분말을 사용할 경우 모르타르의 표면 평활성이 좋아지고, 방수성, 인장강도, 압축강도, 내열성, 내구성 등의 물성이 향상되는 효과를 볼 수 있다. The mica, zeolite and bentonite are porous materials having excellent deodorizing, antibacterial and antifungal properties and have beneficial microorganisms and enzymes, which can block the characteristic odor of cement and alkaline substance, and has the function of decomposing and removing the toxicity of cement. Such natural stone powders strongly bind the reinforcing fibers and the polyvinyl alcohol powder resin with the cement and siliceous components during the hardening of the mortar composition, and exhibit strong adhesive force between the components constituting the structure and adhesion force due to penetration, And to make it compact. Therefore, when the natural stone powder is used, the surface smoothness of the mortar is improved, and the physical properties such as water resistance, tensile strength, compressive strength, heat resistance and durability are improved.

이어서, 상기 본 발명에 따른 모르타르 조성물을 이용하여 수중 콘크리트 구조물을 보수 보강하는 방법에 관하여 설명한다. Next, a method for repairing and reinforcing a concrete structure in water using the mortar composition according to the present invention will be described.

본 발명에 따른 수중 콘크리트 구조물의 보수 보강 공법은 The repair and reinforcement method of an underwater concrete structure according to the present invention

(1) 결합재 20 ~ 50 중량부, 규사 100~120 중량부, 보강섬유 0.5~2.0 중량부, 폴리머 10 ~ 50 중량부, 수축방지제 0.5~2.0 중량부, 실리카 흄 3~7 중량부, 클링커 0.5 내지 10 중량부, 플라스터 0.5 내지 10 중량부, 알파형 반수석고 0.5 내지 10 중량부, 플라이애쉬 0.01 내지 5 중량부, 레드머드 0.1 내지 5 중량부, 하소포졸라나 0.01 내지 10 중량부, 마이크로실리카 0.01 내지 10 중량부, 소포제 0.1~1.0 중량부, 팽창제 5~10 중량부, 경화촉진제 0.1~10 중량부, 유동화제 0.2~20 중량부 및 증점제 혼합물 2 ~ 20 중량부를 포함하여 구성되는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물로서, 상기 결합재는 조강 시멘트 20 ~ 50 중량%, 포틀랜트 시멘트 30 ~ 60 중량% 및 알루미나 시멘트 10 ~ 50 중량%를 포함하여 이루어지며, 상기 보강섬유는 폴리프로필렌 섬유, 나일론 섬유 및 천연 아르보셀 섬유의 혼합물로 이루어지고, 상기 폴리머는 EVA 수지와 아크릴계 재유화 수지의 혼합물로 이루어지며, 상기 증점제는 셀룰로오스계 증점제 및 아크릴계 증점제의 혼합물로 이루어진 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 제조하는 제1단계;(1) 20 to 50 parts by weight of binders, 100 to 120 parts by weight of silica fibers, 0.5 to 2.0 parts by weight of reinforcing fibers, 10 to 50 parts by weight of polymer, 0.5 to 2.0 parts by weight of shrinkage inhibitor, 3 to 7 parts by weight of silica fume, To 10 parts by weight of plaster, 0.5 to 10 parts by weight of plaster, 0.5 to 10 parts by weight of alpha type hemihydrate, 0.01 to 5 parts by weight of fly ash, 0.1 to 5 parts by weight of red mud, 0.01 to 10 parts by weight of calcined pozzolan, To 10 parts by weight of an antifoaming agent, 0.1 to 1.0 part by weight of an antifoaming agent, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a thickener mixture Wherein the binder comprises 20 to 50% by weight of crude steel cement, 30 to 60% by weight of a portland cement and 10 to 50% by weight of an alumina cement, wherein the reinforcing fiber is a polypropylene fiber, a nylon fiber, Natural arbor Wherein the polymer is a mixture of an EVA resin and an acryl-based re-emulsified resin, and the thickener is a mixture of a cellulose-based thickener and an acrylic thickener, the mortar composition for underwater concrete structure repair and reinforcement ;

(2) 손상된 수중 콘크리트 구조물의 시공 대상면을 치핑하여 손상되지 않은 부분이 나올 때까지 단면을 다듬는 제2단계; 및 (2) a second step of chipping the work surface of the damaged underwater concrete structure and polishing the cross section until an undamaged portion is obtained; And

(3) 상기 다듬어진 시공 대상면에 상기 (1) 단계에서 얻은 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 도포하고 양생시키는 단계;(3) applying and curing the mortar composition for underwater concrete structure repair and reinforcement obtained in the step (1) to the trimmed surface to be applied;

를 포함하여 구성된다. .

상기 모르타르 조성물 도포시 스프레이 또는 흙손을 이용하여 1차 타설시 5~15 mm, 2차 및 3차 타설시 20~50 mm 및 최종 타설시 5~15 mm 두께로 시공 및 미장하여 형성시킬 수 있다.When the mortar composition is applied, it may be formed by spraying or troweling at a thickness of 5 to 15 mm for primary casting, 20 to 50 mm for secondary and tertiary casting, and 5 to 15 mm for final casting.

이하에서는 본 발명을 실시예예 의거하여 더욱 상세하게 설명한다. 그러나, 본 발명의 범위가 하기 실시예에 의해 제한되는 것은 아니다. Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited by the following examples.

[실시예][Example]

(실시예 1)(Example 1)

포틀랜트 시멘트 45중량%, 조강시멘트 35중량% 및 슬래그 시멘트 25 중량%를 혼합하여 결합재를 제조하였다.45% by weight of portland cement, 35% by weight of crude steel cement and 25% by weight of slag cement were mixed to prepare a binder.

상기 결합재 100 중량부, 평균입경이 0.1~1.2 mm인 세사로 이루어진 규사 150 중량부, 폴리프로필렌 섬유, 나일론 섬유 및 아르보셀 섬유가 각각 30:30:40의 중량비율로 혼합된 보강 섬유 2.0 중량부, EVA 수지 및 아크릴계 재유화 수지가 30:70 중량비로 혼합된 폴리머 수지 20 중량부, 50~80 중량%네오펜틸글리콜 수축방지제 1.0 중량부, 실리카 흄 5.0 중량부, 클링커 5 중량부, 플라스터 5 중량부, 알파형 반수석고 5 중량부, 플라이애쉬 3 중량부, 레드머드 1 중량부, 하소포졸라나 7 중량부, 마이크로실리카 3 중량부, 소포제 0.3 중량부, 칼슘 설포알루미네이트(CSA) 팽창제 8 중량부, 경화촉진제 2.0 중량부, 유동화제 1.0 중량부 및 셀룰로오스계 증점제 및 아크릴계 증점제가 20:80 중량비로 혼합된 증점제 혼합물 10 중량부를 일정량의 물과 혼합하여 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 제조하였다. 100 parts by weight of the binder, 150 parts by weight of silica sand having an average particle size of 0.1 to 1.2 mm, 2.0 parts by weight of reinforcing fibers in which polypropylene fiber, nylon fiber and arbocel fiber were mixed at a weight ratio of 30:30:40, , 20 parts by weight of a polymer resin in which EVA resin and acrylic resin were mixed at a weight ratio of 30:70, 50 to 80% by weight of neopentyl glycol shrinkage inhibitor, 1.0 part by weight of silica fume, 5 parts by weight of clinker, 5 parts by weight of plaster 5 parts by weight of alpha-hemihydrate gypsum, 3 parts by weight of fly ash, 1 part by weight of red mud, 7 parts by weight of calcined porpholane, 3 parts by weight of microsilica, 0.3 parts by weight of defoamer, 8 parts by weight of calcium sulfoaluminate (CSA) , 2.0 parts by weight of a curing accelerator, 1.0 part by weight of a fluidizing agent, and 10 parts by weight of a thickener mixture in which a cellulose thickener and an acrylic thickener were mixed in a weight ratio of 20:80, were mixed with a predetermined amount of water, A mortar composition for water reinforcement was prepared.

(실시예 2)(Example 2)

실시예 1과 동일한 방법으로 제조하되 상기 조성에 분말의 직경이 0.01~10 ㎛ 범위에 포함되며 운모, 제올라이트 및 벤토나이트가 각각 40:30:30의 중량비로 혼합된 천연석 분말 1.0 중량부를 더 포함한 것만 다르게 하여 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 제조하였다. Except that 1.0 parts by weight of natural stone powder mixed in a weight ratio of mica, zeolite and bentonite of 40:30:30 were contained in the composition in the range of 0.01 to 10 mu m in diameter, To prepare a mortar composition for underwater concrete structure repair and reinforcement.

(비교예 1)(Comparative Example 1)

포틀랜트 시멘트 100 중량부, 석회석 9.5 중량부, 규사(평균입경 0.5mm) 55 중량부 및 수중불분리제(메틸셀룰로오스) 3.5 중량부를 혼합하여 모르타르 조성물을 제조하였다. 추가로 상기 포틀랜트 시멘트 100중량부에 대해 분산제 0.5 중량부, 소포제 0.2 중량부, 지연제 0.05 중량부를 첨가한 후, 물 16 중량부를 혼합하여 모르타르 조성물을 제조하였다.A mortar composition was prepared by mixing 100 parts by weight of portland cement, 9.5 parts by weight of limestone, 55 parts by weight of silica sand (average particle diameter 0.5 mm) and 3.5 parts by weight of an underwater bleaching agent (methyl cellulose). To the 100 parts by weight of the portland cement, 0.5 parts by weight of a dispersant, 0.2 parts by weight of a defoaming agent and 0.05 parts by weight of a retarder were added, and then 16 parts by weight of water was mixed to prepare a mortar composition.

(비교예 2)(Comparative Example 2)

비교예 1과 동일한 조성으로 조성물을 얻되 상기 포틀랜트 시멘트 100 중량부를 기준으로 석고 성분 3.5 중량부를 추가로 포함하여 비교예 1과 동일한 방법으로 모르타르 조성물을 제조하였다. A mortar composition was prepared in the same manner as in Comparative Example 1, except that 3.5 parts by weight of the gypsum component was added based on 100 parts by weight of the portland cement.

(비교예 3)(Comparative Example 3)

결합재로 포틀랜트시멘트 및 조강시멘트의 혼합물을 사용하여 비교예 1과 동일한 방법으로 모르타르 조성물을 제조하였다.A mortar composition was prepared in the same manner as in Comparative Example 1, using a mixture of portland cement and crude steel cement as a binder.

성능 평가Performance evaluation

(1) 모르타르 조성물의 물성(1) Properties of Mortar Composition

상기 실시예 및 비교예에서 제조된 모르타르 조성물을 이용하여 시험체를 제조하여 하기 시험 방법에 의해 물성을 측정하였다.The mortar composition prepared in the above Examples and Comparative Examples was used to prepare a test specimen, and physical properties were measured by the following test methods.

1) 응결시간 : KSF 24361) Curing time: KSF 2436

2) 휨강도 : KS F 2476「폴리머 시멘트 모르타르의 강도시험 방법」2) Bending strength: KS F 2476 "Strength test method of polymer cement mortar"

3) 압축강도 : KSF 24053) Compressive strength: KSF 2405

4) 부착강도 : KS F 4716 「폴리머 시멘트 모르타르의 강도시험 방법」4) Bond strength: KS F 4716 "Strength test method of polymer cement mortar"

5) 길이변화율 : KS F 2424 모르타르 및 콘크리트의 길이 변화 시험 방법에 따라 측정하였다. 그 값은 초기 시공체의 값을 0으로 하여, “-”는 수축율을 나타내는 것이며, “+”는 팽창율을 나타내는 것이다.5) Length change ratio: KS F 2424 The length change rate of mortar and concrete was measured according to the test method. The value of "0" represents the value of the initial applied body, "-" represents the shrinkage ratio, and "+" represents the expansion ratio.

6) 플로우 : KS L 5220에 준하여 실시6) Flow: Conducted according to KS L 5220

그 결과를 하기 표 1에 나타내었다. The results are shown in Table 1 below.

항목Item 실시예 1Example 1 실시예 2Example 2 비교예 1Comparative Example 1 비교예 2Comparative Example 2 비교예 3Comparative Example 3 응결시간(분)Condensation time (min) 초결Fresh 3030 2929 3535 3838 6161 종결closing 4141 3939 5050 5555 100100 휨강도
(N/mm2)Flexural strength
(N / mm 2 ) 기중mourning 1919 1818 1010 1010 88 수중Underwater 1515 1515 88 99 77 압축강도
(N/mm2)Compressive strength
(N / mm 2 ) 기중mourning 7171 7575 4444 4444 4040 수중Underwater 6565 6666 4040 4040 3838 부착강도
(N/mm2)Bond strength
(N / mm 2 ) 기중mourning 6.96.9 6.56.5 3.23.2 3.53.5 2.02.0 수중Underwater 5.05.0 5.55.5 1.21.2 1.71.7 0.90.9 길이변화율(%)Length change rate (%) +0.01+0.01 +0.02+0.02 +0.01+0.01 +0.02+0.02 +0.15+0.15 플로우(mm)Flow (mm) 100100 120120 130130 133133 122122

상기 표 1에서 보는 바와 같이 본 발명에 따른 수중 콘크리트 구조물 보수 보강용 모르타르 조성물의 경우, 종래의 수중 구조물용 모르타르 조성물에 비하여 물성이 현저하게 우수하며, 특히 기중 및 수중에서의 압축강도 및 부착 강도가 현저히 우수한 것을 확인할 수 있다. As shown in Table 1, the mortar composition for underwater concrete structure repair and reinforcement according to the present invention has remarkably excellent physical properties as compared with the conventional mortar composition for underwater structures, and in particular, the compressive strength and the adhesion strength It can be confirmed that it is remarkably excellent.

(2) 단면복구 성능 평가(2) Evaluation of sectional restoration performance

1) 내후성 평가1) Weatherability evaluation

ASTM G 155에 따라 400시간 측정하였다. ASTM G 155 for 400 hours.

2) 표면 경도 평가2) Evaluation of surface hardness

KS D 6711에 따라 연필경도를 측정하였다. The pencil hardness was measured according to KS D 6711.

3) 내수성 평가3) Water resistance evaluation

90℃ 열수에서 연속으로 표면 변형(균열, 블리스터 등)이 일어나는 시간을 측정하였다. The time at which surface deformation (cracks, blisters, etc.) occurred continuously in 90 ° C hot water was measured.

상기 평가 결과를 표 2에 나타내었다. The evaluation results are shown in Table 2.

내후성(백색)Weatherability (white) 표면경도Surface hardness 내수성Water resistance 실시예 1Example 1 △E2.0? E2.0 4H4H 720hr720 hr 실시예 2Example 2 △E1.9E1.9 4H4H 700hr700hr 비교예 1Comparative Example 1 △E3.2E3.2 3H3H 420hr420hr 비교예 2Comparative Example 2 △E3.5E3.5 3H3H 310hr310hr 비교예 3Comparative Example 3 △E3.8E3.8 2H2H 350hr350hr

상기 표 1 및 표 2의 결과로부터 본 발명에 따른 수중 콘크리트 구조물의 보수 보강 공법을 사용하면 모르타르의 성능도 우수하고, 콘크리트와의 부착성도 뛰어나며, 내후성, 내수성 등의 물성도 우수하므로 수중 콘크리트 구조물의 보수 보강을 효율적으로 할 수 있으며 또한, 보수 보강의 효과도 장기간 동안 유지할 수 있음을 확인할 수 있다.From the results of Table 1 and Table 2, it can be seen that when the repair and reinforcement method of the underwater concrete structure according to the present invention is used, the performance of the mortar is excellent and also the adhesion with concrete is excellent, and the properties such as weather resistance and water resistance are also excellent. It can be seen that the repair and reinforcement can be efficiently performed and the effect of the repair and reinforcement can be maintained for a long period of time.

이상과 같이, 본 발명을 실시예를 참조하여 그 특징에 관하여 구체적으로 설명하였으나, 본 발명은 본 발명이 속하는 기술 분야의 통상의 기술자에 의하여 다양한 변형 및 변경이 가능하고 이러한 변형 및 변경은 본 발명의 보호범위에 속하는 것으로 해석되어야 할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, The present invention is not limited thereto.

Claims (11)

결합재 100 중량부, 규사 100~200 중량부, 보강섬유 0.5~10 중량부, 폴리머 10 ~ 50 중량부, 수축방지제 0.5~2.0 중량부, 실리카 흄 3~7 중량부, 클링커 0.5 내지 10 중량부, 플라스터 0.5 내지 10 중량부, 알파형 반수석고 0.5 내지 10 중량부, 플라이애쉬 0.01 내지 5 중량부, 레드머드 0.1 내지 5 중량부, 하소포졸라나 0.01 내지 10 중량부, 마이크로실리카 0.01 내지 10 중량부, 소포제 0.1~1.0 중량부, 팽창제 5~10 중량부, 경화촉진제 0.1~10 중량부, 유동화제 0.2~20 중량부 및 증점제 혼합물 2 ~ 20 중량부를 포함하여 구성되는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물로서,
상기 결합재는 조강 시멘트 20 ~ 50 중량%, 포틀랜트 시멘트 30 ~ 60 중량% 및 알루미나 시멘트 10 ~ 50 중량%를 포함하여 이루어지며,
상기 보강섬유는 폴리프로필렌 섬유, 나일론 섬유 및 아르보셀 섬유의 혼합물로 이루어지고,
상기 폴리머는 EVA(Ethylene-vinyl acetate) 수지 20~50 중량% 및 아크릴계 재유화 수지 50~80 중량%를 포함하여 이루어지며, 상기 아크릴계 재유화 수지는 아크릴계 중합체 80~90중량% 및 가교 가능한 작용기를 가지는 단량체 10~20중량%로 이루어진 전체 단량체 100중량부; 반응성 음이온 유화제 및 비이온 유화제 0.1~5중량부; 중합개시제 0.01~1중량부; 및 물 45~50중량부를 포함하는 프리에멀젼을 중합반응하여 얻어진 아크릴 에멀젼 중합물인 것을 특징으로 하되, 상기 가교 가능한 작용기를 가지는 단량체는 메타크릴옥시프로필트리메톡시실란, 아크릴로 니트릴, 아세토아세틱 에틸 메타아크릴레이트, 디비닐벤젠, 에틸렌 글리콜 다이메타 아크릴레이트, 부탄디올 다이메타 아크릴레이트, 싸이클로 헥실 메타아크릴레이트 및 3-클로로-2-하이드록시프로필 메타아크릴레이트 중에서 선택된 1종 또는 2종 이상의 혼합물인 것을 특징으로 하며,
상기 증점제는 셀룰로오스계 증점제 및 아크릴계 증점제의 혼합물로 이루어진 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
100 to 200 parts by weight of a binder, 0.5 to 10 parts by weight of reinforcing fibers, 10 to 50 parts by weight of a polymer, 0.5 to 2.0 parts by weight of a shrinkage inhibitor, 3 to 7 parts by weight of silica fume, 0.5 to 10 parts by weight of clinker, 0.5 to 10 parts by weight of plaster, 0.5 to 10 parts by weight of alpha type hemihydrate, 0.01 to 5 parts by weight of fly ash, 0.1 to 5 parts by weight of red mud, 0.01 to 10 parts by weight of calcined pomolane, 0.01 to 10 parts by weight of micro silica, 0.1 to 1.0 part by weight of an antifoaming agent, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a mixture of a thickener as a mortar composition ,
Wherein the binder comprises 20 to 50 wt% of crude steel cement, 30 to 60 wt% of portland cement, and 10 to 50 wt% of alumina cement,
Wherein the reinforcing fiber is made of a mixture of polypropylene fiber, nylon fiber and arbocell fiber,
Wherein the polymer comprises 20 to 50% by weight of an ethylene-vinyl acetate (EVA) resin and 50 to 80% by weight of an acryl-based re-emulsified resin, wherein the acrylic-based resin comprises 80 to 90% by weight of an acrylic polymer, 100 parts by weight of an entire monomer consisting of 10 to 20% by weight of a monomer to be contained; 0.1 to 5 parts by weight of a reactive anionic emulsifier and a nonionic emulsifier; 0.01 to 1 part by weight of a polymerization initiator; And 45 to 50 parts by weight of water, wherein the monomer having a crosslinkable functional group is selected from the group consisting of methacryloxypropyltrimethoxysilane, acrylonitrile, acetoaceticyl ethyl Is a mixture of at least one member selected from the group consisting of methacrylate, divinylbenzene, ethylene glycol dimethacrylate, butanediol dimethacrylate, cyclohexylmethacrylate and 3-chloro-2-hydroxypropylmethacrylate In addition,
Wherein the thickener comprises a mixture of a cellulose thickener and an acrylic thickener. ≪ RTI ID = 0.0 > 18. < / RTI >
청구항 1에 있어서, 상기 보강섬유는 폴리프로필렌 섬유 20~50 중량%, 나일론 섬유 20~50 중량% 및 아르보셀 섬유 30~60 중량%를 포함하여 이루어진 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
The reinforcing fiber of claim 1, wherein the reinforcing fiber comprises 20 to 50 wt% of polypropylene fiber, 20 to 50 wt% of nylon fiber, and 30 to 60 wt% of Arbocel fiber. .
삭제delete 삭제delete 삭제delete 청구항 1에 있어서, 상기 경화촉진제는 칼슘설포 알루미네이트, 염화칼슘, 규산나트륨, 규산칼슘, 황산나트륨, 황산칼슘, 염화리튬 및 황산리튬 중에서 선택된 1종 또는 2종 이상의 혼합물인 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
The curing accelerator according to claim 1, wherein the curing accelerator is one or a mixture of two or more selected from calcium sulfoaluminate, calcium chloride, sodium silicate, calcium silicate, sodium sulfate, calcium sulfate, lithium chloride and lithium sulfate. Reinforced mortar composition.
청구항 1에 있어서, 상기 유동화제는 멜라민셀폰산계, 나프탈렌셀폰산계, 폴리카본산계, 리그닌슬폰산계 또는 알킬아릴슬폰산계 유동화제인 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
The mortar composition for repairing and reinforcing an underwater concrete structure according to claim 1, wherein the fluidizing agent is a melamine cellophane-based, naphthalene-based, cellophane-based, polycarbonate-based, lignin-sulfonated or alkylarylsulfonic acid-based fluidizing agent.
청구항 1에 있어서, 상기 증점제는 셀룰로오스계 증점제 10~50 중량% 및 아크릴계 증점제 50~90 중량%를 포함하는 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
The mortar composition for repairing and reinforcing an underwater concrete structure according to claim 1, wherein the thickener comprises 10 to 50% by weight of a cellulose thickener and 50 to 90% by weight of an acrylic thickener.
청구항 8에 있어서, 상기 셀룰로오스계 증점제는 메틸계 셀룰로오스, 에틸계 셀룰로오스, 프로필계 셀룰로오스 중에서 선택되는 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
[Claim 8] The mortar composition according to claim 8, wherein the cellulose thickener is selected from methyl cellulose, ethyl cellulose and propyl cellulose.
청구항 8에 있어서,
상기 아크릴계 증점제는 폴리아크릴아미드, 아크릴산 소다, 폴리에틸렌 옥사이드 및 아크릴아미드와 아크릴산 소다의 공중합체 중에서 선택되는 1종 또는 2종 이상의 혼합물인 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물.
The method of claim 8,
Wherein the acrylic thickener is one or a mixture of two or more selected from the group consisting of polyacrylamide, sodium acrylate, polyethylene oxide, and copolymers of acrylamide and sodium acrylate.
(1) 결합재 20 ~ 50 중량부, 규사 100~120 중량부, 보강섬유 0.5~2.0 중량부, 폴리머 10 ~ 50 중량부, 수축방지제 0.5~2.0 중량부, 실리카 흄 3~7 중량부, 클링커 0.5 내지 10 중량부, 플라스터 0.5 내지 10 중량부, 알파형 반수석고 0.5 내지 10 중량부, 플라이애쉬 0.01 내지 5 중량부, 레드머드 0.1 내지 5 중량부, 하소포졸라나 0.01 내지 10 중량부, 마이크로실리카 0.01 내지 10 중량부, 소포제 0.1~1.0 중량부, 팽창제 5~10 중량부, 경화촉진제 0.1~10 중량부, 유동화제 0.2~20 중량부 및 증점제 혼합물 2 ~ 20 중량부를 포함하여 구성되는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물로서, 상기 결합재는 조강 시멘트 20 ~ 50 중량%, 포틀랜트 시멘트 30 ~ 60 중량% 및 알루미나 시멘트 10 ~ 50 중량%를 포함하여 이루어지며, 상기 보강섬유는 폴리프로필렌 섬유, 나일론 섬유 및 천연 아르보셀 섬유의 혼합물로 이루어지고, 상기 폴리머는 EVA(Ethylene-vinyl acetate) 수지 20~50 중량% 및 아크릴계 재유화 수지 50~80 중량%를 포함하여 이루어지며, 상기 아크릴계 재유화 수지는 아크릴계 중합체 80~90중량% 및 가교 가능한 작용기를 가지는 단량체 10~20중량%로 이루어진 전체 단량체 100중량부; 반응성 음이온 유화제 및 비이온 유화제 0.1~5중량부; 중합개시제 0.01~1중량부; 및 물 45~50중량부를 포함하는 프리에멀젼을 중합반응하여 얻어진 아크릴 에멀젼 중합물인 것을 특징으로 하되, 상기 가교 가능한 작용기를 가지는 단량체는 메타크릴옥시프로필트리메톡시실란, 아크릴로 니트릴, 아세토아세틱 에틸 메타아크릴레이트, 디비닐벤젠, 에틸렌 글리콜 다이메타 아크릴레이트, 부탄디올 다이메타 아크릴레이트, 싸이클로 헥실 메타아크릴레이트 및 3-클로로-2-하이드록시프로필 메타아크릴레이트 중에서 선택된 1종 또는 2종 이상의 혼합물인 것을 특징으로 하며, 상기 증점제는 셀룰로오스계 증점제 및 아크릴계 증점제의 혼합물로 이루어진 것을 특징으로 하는 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 제조하는 제1단계;
(2) 손상된 수중 콘크리트 구조물의 시공 대상면을 치핑하여 손상되지 않은 부분이 나올 때까지 단면을 다듬는 제2단계; 및
(3) 상기 다듬어진 시공 대상면에 상기 (1) 단계에서 얻은 수중 콘크리트 구조물 보수 보강용 모르타르 조성물을 도포하고 양생시키는 단계;
를 포함하는 수중 콘크리트 구조물의 보수 보강 공법.(1) 20 to 50 parts by weight of binders, 100 to 120 parts by weight of silica fibers, 0.5 to 2.0 parts by weight of reinforcing fibers, 10 to 50 parts by weight of polymer, 0.5 to 2.0 parts by weight of shrinkage inhibitor, 3 to 7 parts by weight of silica fume, To 10 parts by weight of plaster, 0.5 to 10 parts by weight of plaster, 0.5 to 10 parts by weight of alpha type hemihydrate, 0.01 to 5 parts by weight of fly ash, 0.1 to 5 parts by weight of red mud, 0.01 to 10 parts by weight of calcined pozzolan, To 10 parts by weight of an antifoaming agent, 0.1 to 1.0 part by weight of an antifoaming agent, 5 to 10 parts by weight of an expanding agent, 0.1 to 10 parts by weight of a curing accelerator, 0.2 to 20 parts by weight of a fluidizing agent and 2 to 20 parts by weight of a thickener mixture Wherein the binder comprises 20 to 50% by weight of crude steel cement, 30 to 60% by weight of a portland cement and 10 to 50% by weight of an alumina cement, wherein the reinforcing fiber is a polypropylene fiber, a nylon fiber, Natural arbor Wherein the polymer comprises 20 to 50% by weight of an ethylene-vinyl acetate (EVA) resin and 50 to 80% by weight of an acryl-based re-emulsified resin, and the acrylic- By weight and 10 to 20% by weight of a monomer having a crosslinkable functional group; 0.1 to 5 parts by weight of a reactive anionic emulsifier and a nonionic emulsifier; 0.01 to 1 part by weight of a polymerization initiator; And 45 to 50 parts by weight of water, wherein the monomer having a crosslinkable functional group is selected from the group consisting of methacryloxypropyltrimethoxysilane, acrylonitrile, acetoaceticyl ethyl Is a mixture of at least one member selected from the group consisting of methacrylate, divinylbenzene, ethylene glycol dimethacrylate, butanediol dimethacrylate, cyclohexylmethacrylate and 3-chloro-2-hydroxypropylmethacrylate Wherein the thickener comprises a mixture of a cellulose thickener and an acrylic thickener. The first step of preparing the mortar composition for underwater concrete structure repair and reinforcement comprises:
(2) a second step of chipping the work surface of the damaged underwater concrete structure and polishing the cross section until an undamaged portion is obtained; And
(3) applying and curing the mortar composition for underwater concrete structure repair and reinforcement obtained in the step (1) to the trimmed surface to be applied;
Repair and Rehabilitation Method of Underwater Concrete Structure.
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CN112851245A (en) * 2021-01-27 2021-05-28 青岛华欧砼业有限公司 Underwater concrete and preparation method thereof
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CN114276077A (en) * 2021-12-09 2022-04-05 堡森(上海)新材料科技有限公司 Underwater building structure repair material and preparation method and application thereof
CN114230304A (en) * 2021-12-23 2022-03-25 绵竹市铸诚混凝土有限公司 Environment-friendly anti-freezing concrete and preparation method thereof
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CN115974444A (en) * 2022-12-26 2023-04-18 天津大学 Cement crack activation crosslinking repair system and preparation method and application thereof
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CN116969743A (en) * 2023-09-22 2023-10-31 高密市东泰建材有限公司 Ceramic tile paving dry powder sand slurry special for decoration and preparation method thereof
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