KR101547895B1 - water-soluble latex mortar for concrete repair and construction and method of manufacturing the same and method - Google Patents
water-soluble latex mortar for concrete repair and construction and method of manufacturing the same and method Download PDFInfo
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- KR101547895B1 KR101547895B1 KR1020140161053A KR20140161053A KR101547895B1 KR 101547895 B1 KR101547895 B1 KR 101547895B1 KR 1020140161053 A KR1020140161053 A KR 1020140161053A KR 20140161053 A KR20140161053 A KR 20140161053A KR 101547895 B1 KR101547895 B1 KR 101547895B1
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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
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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
- 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
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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
- 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
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
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- 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
Abstract
Description
본 발명은 콘크리트 구조물 보수용 수용성 라텍스 모르타르 및 이의 제조 및 시공방법에 관한 것으로, 특히 수용성 라텍스, 포졸란 반응성 혼화제, 단사섬유를 이용하여 시멘트 경화체의 조직 및 공극 구조를 개선하여 염해, 중성화, 표면 박리, 골재 탈리 및 팝아웃(Pop out) 등과 같이 콘크리트 구조물(도로의 노면, 교량 교면, 교량의 콘크리트 슬래브, 교량 신축이음부 등의 구조물, 하수관거, 해양콘크리트 구조물, 수중콘크리트 구조물로서 콘크리트로 이루어진 구조물을 포함하는 의미)의 내구성을 저하하는 열화 요인으로부터 콘크리트 구조물을 보호하고, 강도발현이 우수한 양질의 제품을 얻을 수 있도록 한 콘크리트 구조물 보수용 수용성 라텍스 모르타르 및 이의 제조 및 시공방법에 관한 것이다.The present invention relates to a water-soluble latex mortar for repairing a concrete structure, and a method for manufacturing and applying the water-soluble latex mortar for repairing concrete structures. More particularly, the present invention relates to a water- Concrete structures such as road surfaces, bridge bridges, concrete slabs of bridges, bridges and other structures such as bridges, sewer pipes, marine concrete structures, and concrete structures such as underwater concrete structures. The present invention relates to a water-soluble latex mortar for repairing a concrete structure and a method for manufacturing and constructing the same, which is capable of protecting a concrete structure from deterioration deteriorating durability of a concrete structure.
일반적으로 토목 및 건축분야에서 각종 콘크리트 구조물은 환경적 요인과 사용재료의 내구성 저하 등 복합적인 영향으로 중성화, 동해, 염해 등 콘크리트의 열화현상이 진행되어 구조물의 내하력 및 내구성이 저하되고, 안전성이 떨어져 콘크리트 구조물의 유지관리를 위한 열화된 콘크리트 구조물의 단면복구 및 내구성능 향상을 위한 적절한 보수 및 보강 공법이 요구되고 있는 실정이다.Generally, various concrete structures in civil engineering and construction are degraded due to the deterioration of concrete such as neutralization, frost, and saltation due to environmental factors and deterioration of durability of materials used. There is a need for an appropriate repair and reinforcement method for improving the endurance and restoration performance of deteriorated concrete structures for maintenance of concrete structures.
여기서, 상기한 콘크리트 구조물의 보수 및 보강에 널리 이용되는 종래의 재료는 주로 폴리머 시멘트 모르타르가 쓰이고 있다. Here, polymeric cement mortar is mainly used as a conventional material widely used for repairing and reinforcing concrete structures.
상기한 폴리머 시멘트 모르타르는 콘크리트 구조물과의 일체화 특성은 우수하나, 보수재료의 부착성 향상을 위하여 증점제를 첨가함으로써 스프레이 장비를 이용한 기계 시공시 이송호스 내부의 표면과 마찰력이 증대되어 이송호스가 막힐 뿐만 아니라 토출량이 적어져 시공속도가 저하되고, 폴리머의 종류나 첨가량에 따라 흙손 바름 작업성이 나빠지고, 타설 두께가 비교적 얇아 여러 번의 반복적인 시공이 필요하여 시공성의 개선이 요구된다.The polymer cement mortar has excellent integration with the concrete structure. However, since the thickener is added to improve the adhesion of the repairing material, the surface and friction force inside the conveying hose are increased during the machine construction using the spray equipment, However, it is required to improve the workability because the discharge rate is decreased and the construction speed is lowered, the trowel workability is deteriorated depending on the kind of polymer and the amount of addition, and the thickness of the casting is relatively thin.
이에, 본 발명은 상기한 바와 같은 제문제점을 해결하기 위해 안출된 것으로, 시공 부착력이 우수하고 리바운드량 및 이송호스 내 막힘 현상을 최소화하여 일정한 토출량을 확보하고, 1회 타설 두께를 증가시켜 시공속도 및 시공기간을 단축할 수 있도록 한 콘크리트 구조물 보수용 수용성 라텍스 모르타르 및 이의 제조 및 시공방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus and a method for securing a constant amount of discharge by minimizing the rebound amount and the clogging in the transfer hose, And to provide a water-soluble latex mortar for repairing a concrete structure and a method of manufacturing and constructing the same.
또한, 본 발명은 안정적인 강도발현은 물론 중성화, 동해, 염해 등의 내구성능을 향상시키고 보수 단면과의 일체화 거동 특성이 우수하며 균열제어 효과가 우수한 콘크리트 구조물 보수용 수용성 라텍스 모르타르 및 이의 제조 및 시공방법을 제공하는 데 다른 목적이 있다. The present invention also relates to a water-soluble latex mortar for improving the durability such as neutralization, frost, and saltation as well as stable strength development, and excellent in cracking control effect, There are other purposes to provide.
상기한 목적을 달성하기 위한 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르는 시멘트 87.5~91.0중량부, 실리카 흄, 플라이 애쉬 중에 1종 이상이 선택된 포졸란 반응성 혼화제 5~10중량부, 폴리카본산계 감수제 0.1~2중량부, 유리섬유, 비닐섬유, 폴리비닐알코올 섬유, 폴리프로필렌섬유, 나일론 섬유 중의 어느 하나의 길이 6~12mm의 단사섬유로 구성된 보강섬유 0.1~1.5중량부, CSA계 팽창재와 무수석고(CaSO4)로 구성된 수축저감제 0.5~2.5 중량부로 구성된 시멘트혼합물 40~45중량부와; 강모래, 규사, 부순모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된 잔골재 36~47중량부와; 합성라텍스 고형분 47중량부와 물 57중량부로 구성된 수용성 라텍스 5~15중량부로 구성됨을 특징으로 한다.To achieve the above object, the water-soluble latex mortar for repairing concrete structures according to the present invention comprises 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture selected from at least one of silica fume and fly ash, 0.1 to 2 parts by weight of reinforcing fibers composed of monofilament fibers having a length of 6 to 12 mm of any one of glass fibers, vinyl fibers, polyvinyl alcohol fibers, polypropylene fibers and nylon fibers, 0.1 to 1.5 parts by weight of reinforcing fibers of CSA- (CaSO 4) as shrinkage reducing agent 0.5 to 2.5 parts by weight of cement mixture 40 to 45 parts by weight consisting of consisting of; 36 to 47 parts by weight of a fine aggregate composed of at least one kind selected from river sand, silica sand, crushed sand and regenerated fine aggregate; And 5 to 15 parts by weight of a water-soluble latex composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of water.
또한, 상기한 목적을 달성하기 위한 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 제조방법은 시멘트 87.5~91.0중량부, 실리카 흄, 플라이 애쉬 중에 1종 이상이 선택된 포졸란 반응성 혼화제 5~10중량부, 폴리카본산계 감수제 0.1~2중량부, 유리섬유, 비닐섬유, 폴리비닐알코올 섬유, 폴리프로필렌섬유, 나일론 섬유 중의 어느 하나의 길이 6~12mm의 단사섬유로 구성된 보강섬유 0.1~1.5중량부, CSA계 팽창재와 무수석고(CaSO4)로 구성된 수축저감제 0.5~2.5 중량부로 이루어지는 시멘트혼합물 40~45중량부와; 강모래, 규사, 부순모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된 잔골재 36~47중량부와; 합성라텍스 고형분 47중량부와 물 57중량부로 구성된 수용성 라텍스 5~15중량부로 구성된 콘크리트 구조물 수용성 라텍스 모르타르에 물 4~8중량부를 혼합 교반하여 제조함을 특징으로 한다.In order to achieve the above object, the present invention provides a method for preparing a water-soluble latex mortar for repairing concrete structures, which comprises preparing a water-soluble latex mortar containing 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture selected from silica fume, 0.1 to 2 parts by weight of a polycarboxylic acid-based water reducing agent, 0.1 to 1.5 parts by weight of a reinforcing fiber composed of monofilament fibers having a length of 6 to 12 mm of any one of glass fiber, vinyl fiber, polyvinyl alcohol fiber, polypropylene fiber and nylon fiber, 40 to 45 parts by weight of a cement admixture comprising 0.5 to 2.5 parts by weight of a shrinkage reducing agent composed of an expansion agent and an anhydrous gypsum (CaSO 4 ); 36 to 47 parts by weight of a fine aggregate composed of at least one kind selected from river sand, silica sand, crushed sand and regenerated fine aggregate; 4 to 8 parts by weight of water is mixed and stirred in a concrete structure water-soluble latex mortar composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of a water-soluble latex composed of 57 parts by weight of water.
그리고 상기한 목적을 달성하기 위한 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 시공방법은 대상 콘크리트 구조물의 불순물, 레이턴스 및 열화부위를 핸드워터젯 또는 고압수 세척기를 이용하여 제거하고, 상기 콘크리트 구조물의 열화부위는 콘크리트 구조물의 철근 하부까지 제거하고, 상기 철근에 방청을 처리하는 단계(S Ⅰ); 상기 열화부위가 제거된 콘크리트 구조물의 표면에 프라이머를 도포하는 단계(S Ⅱ); 상기 프라이머 상부에, 시멘트 87.5~91.0중량부, 실리카 흄, 플라이 애쉬 중에 1종 이상이 선택된 포졸란 반응성 혼화제 5~10중량부, 폴리카본산계 감수제 0.1~2중량부, 유리섬유, 비닐섬유, 폴리비닐알코올 섬유, 폴리프로필렌섬유, 나일론 섬유 중의 어느 하나의 길이 6~12mm의 단사섬유로 구성된 보강섬유 0.1~1.5중량부, CSA계 팽창재와 무수석고(CaSO4)로 구성된 수축저감제 0.5~2.5 중량부로 구성된 시멘트혼합물 40~45중량부와; 강모래, 규사, 부순모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된 잔골재 36~47중량부와; 합성라텍스 고형분 47중량부와 물 57중량부로 구성된 수용성 라텍스 5~15중량부로 구성된 콘크리트 구조물 보수용 수용성 라텍스 모르타르에 물 4~8중량부를 혼합 교반한 콘크리트 구조물 보수용 수용성 라텍스 모르타르를 도막두께 5~10mm로 타설하여 단면을 복구하는 단계(S Ⅲ); 상기 단면이 복구된 콘크리트 구조물의 표면에 표면보호제를 도포하여 마무리하는 단계(S Ⅳ)로 이루어짐을 특징으로 한다.According to another aspect of the present invention, there is provided a method of constructing a water-soluble latex mortar for repairing a concrete structure, comprising: removing a impurity, a latent and a deteriorated portion of a target concrete structure using a hand water jet or a high- The deteriorated portion is removed to the lower portion of the reinforcing bar of the concrete structure, and the rustproofing is performed on the reinforcing bar (SII); Applying a primer (SII) to the surface of the concrete structure from which the deteriorated portion has been removed; Wherein the primer is provided on the primer with a mixture of 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture selected from at least one of silica fume and fly ash, 0.1 to 2 parts by weight of a polycarboxylic acid-based water reducing agent, 0.1 to 1.5 parts by weight of reinforcing fibers composed of monofilament fibers having a length of 6 to 12 mm in any one of an alcohol fiber, a polypropylene fiber and a nylon fiber, 0.5 to 2.5 parts by weight of a shrinkage reducing agent composed of a CSA-based expansion material and anhydrous gypsum (CaSO 4 ) 40 to 45 parts by weight of the cement admixture constituted; 36 to 47 parts by weight of a fine aggregate composed of at least one kind selected from river sand, silica sand, crushed sand and regenerated fine aggregate; Water-soluble latex mortar for repairing a concrete structure, which is prepared by mixing 4 to 8 parts by weight of water with water-soluble latex mortar for repairing concrete structure composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of water, and 5 to 15 parts by weight of water, (SIII); < / RTI > And a step (S IV) of applying a surface protective agent to the surface of the restored concrete structure and finishing the surface of the concrete structure.
이상에서 설명한 바와 같이, 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 및 이의 제조 및 시공방법은 다음과 같은 효과가 있다.As described above, the water-soluble latex mortar for repairing concrete structures according to the present invention and the method of manufacturing and constructing the same have the following effects.
첫째, 본 발명은 실리카 흄 및 수용성 라텍스를 사용함으로써, 발현 강도의 증진과 시멘트 경화체의 조직 및 공극 구조를 개선하여 수밀성과 중성화, 동해, 염해 등의 저항성을 향상시키고 미세균열을 억제할 수 있는 효과가 있다.First, by using silica fume and water-soluble latex, the present invention improves the strength of the expression and improves the texture and void structure of the hardened cement to improve resistance to watertightness, neutralization, frost and salt damage, and inhibit microcracks .
둘째, 본 발명은 콘크리트 구조물 보수용 수용성 라텍스 모르타르의 유동성을 증가시켜 이송호스 내 막힘 현상을 최소화하여 일정한 토출량의 확보가 가능하고 기존 구조체와의 부착력이 우수하여 리바운드량 감소 및 1회 타설 두께를 증가시켜 종래의 기술에 비해 시공속도의 상승 및 시공기간 단축시킬 수 있는 효과가 있다.Second, the present invention minimizes the clogging in the transfer hose by increasing the fluidity of the water-soluble latex mortar for repairing the concrete structure, and it is possible to secure a constant discharge amount and to improve the adhesion with the existing structure, So that the construction speed can be increased and the construction time can be shortened compared with the conventional technique.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르는 시멘트혼합물 40~45중량부와, 잔골재 36~47중량부와, 수용성 라텍스 5~15중량부로 구성된다.The water-soluble latex mortar for repairing concrete structures according to the present invention comprises 40 to 45 parts by weight of a cement admixture, 36 to 47 parts by weight of fine aggregate, and 5 to 15 parts by weight of a water-soluble latex.
여기서, 상기 시멘트혼합물은 시멘트 87.5~91.0중량부, 포졸란 반응성 혼화제 5~10중량부, 감수제 0.1~2중량부, 보강섬유 0.1~1.5중량부, 수축저감제 0.5~2.5 중량부로 구성된다.Here, the cement mixture is composed of 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture, 0.1 to 2 parts by weight of a water reducing agent, 0.1 to 1.5 parts by weight of reinforcing fibers, and 0.5 to 2.5 parts by weight of a shrinkage reducing agent.
또한, 상기 잔골재는 강모래, 규사, 부순 모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된다.The fine aggregate is composed of at least one of river sand, silica sand, crushed sand, and reclaimed fine aggregate.
그리고 상기 수용성 라텍스는 합성라텍스 고형분 47중량부와 물 57중량부로 구성된다.The water-soluble latex is composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of water.
이하, 상기한 바와 같은 구성으로 이루어진 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 제조에 대해 설명한다.Hereinafter, the production of water-soluble latex mortar for repairing concrete structures according to the present invention will be described.
본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 제조방법은 시멘트혼합물 40~45중량부와, 잔골재 36~47중량부와, 수용성 라텍스 5~15중량부와 물 4~8중량부를 혼합 교반하여 제조한다.The method for preparing a water-soluble latex mortar for repairing concrete structures according to the present invention comprises mixing 40 to 45 parts by weight of a cement mixture, 36 to 47 parts by weight of fine aggregate, 5 to 15 parts by weight of a water-soluble latex and 4 to 8 parts by weight of water, .
여기서, 상기 시멘트 혼합물은 시멘트 87.5~91.0중량부, 포졸란 반응성 혼화제 5~10중량부, 감수제 0.1~2중량부, 보강섬유 0.1~1.5중량부, 수축저감제 0.5~2.5 중량부로 이루어진다.Here, the cement mixture comprises 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture, 0.1 to 2 parts by weight of a water reducing agent, 0.1 to 1.5 parts by weight of reinforcing fibers, and 0.5 to 2.5 parts by weight of a shrinkage reducing agent.
또한, 상기 잔골재는 강모래, 규사, 부순 모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된다.The fine aggregate is composed of at least one of river sand, silica sand, crushed sand, and reclaimed fine aggregate.
그리고 상기 수용성 라텍스는 합성라텍스 고형분 47중량부와 물 57중량부로 구성된다.The water-soluble latex is composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of water.
즉, 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 제조방법은 시멘트혼합물 40~45중량부와 잔골재 36~47중량부와 수용성 라텍스 5~15중량부 물 4~8중량부를 충분히 교반 및 혼합하여 제조한다.That is, the method for preparing a water-soluble latex mortar for repairing concrete structures according to the present invention is characterized in that 40 to 45 parts by weight of a cement admixture, 36 to 47 parts by weight of fine aggregate and 5 to 15 parts by weight of water- do.
상기한 콘크리트 구조물 보수용 수용성 라텍스 모르타르 구성에서 시멘트 혼합물은 시멘트 87.5~91.0중량부, 포졸란 반응성 혼화제 5~10중량부, 감수제 0.1~2.0중량부, 보강섬유 0.1~1.5중량부, 수축저감제 0.5~2.5중량부로 구성되는 것이 바람직하다.In the water-soluble latex mortar composition for repairing concrete structures, the cement admixture comprises 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture, 0.1 to 2.0 parts by weight of a water reducing agent, 0.1 to 1.5 parts by weight of a reinforcing fiber, 2.5 parts by weight.
여기서, 상기 포졸란 반응 혼화제는 실리카 흄, 플라이 애쉬 중에 1종 이상을 선택적으로 사용할 수 있다. The pozzolanic reaction admixture may be selected from silica fume and fly ash.
또한, 상기 포졸란 반응 혼화제는 산업부산물로서 미세한 고형 입자 형태로 시멘트 입자의 공극을 충전하는 마이크로 필러 효과와 골재 입자, 모르타르와 펌프 및 운송호스 사이의 마찰을 감소시킴으로써 워커빌리티(wordability)와 펌퍼빌리티(pumpability)를 증가시키고 모르타르의 점착성, 재료분리 저항성을 개선하며 블리딩을 감소시키는 역할을 한다. In addition, the pozzolanic reaction admixture is an industrial by-product that reduces the friction between the aggregate particles, the mortar and the pump, and the transport hose by reducing the micropillar effect of filling the pores of the cement particles in the form of fine solid particles, thereby improving wordability and pumpability ) And improves the tackiness of the mortar, resistance to material separation and reduces bleeding.
그리고 수화반응으로 생성되는 수산화칼슘(Ca(OH)2)와 반응하여 장기 강도에 유리하다. It reacts with calcium hydroxide (Ca (OH) 2 ) produced by hydration reaction and is advantageous for long term strength.
포졸란 반응 혼화제는 5% 미만 사용시에는 그 효과를 기대하기 어려우며, 10% 이상 사용할 수 있지만 초기 강도 발현이 느리게 되는 단점이 있다.It is difficult to expect the effect of the pozzolanic reaction admixture when it is used in an amount less than 5%, and it can be used in an amount of 10% or more, but the initial strength development is slow.
한편, 상기 보강섬유는 보수모르타르의 균열, 휨인성 및 부착강도 증진을 위하여 사용한다. On the other hand, the reinforcing fibers are used for improving the cracking, flexural toughness and adhesion strength of the repair mortar.
그 종류로는 유리섬유, 비닐섬유, 폴리비닐알코올 섬유, 폴리프로필렌섬유, 나일론 섬유 등이 있으며, 나일론 섬유를 사용하는 것이 바람직하다. Examples of the fiber include glass fiber, vinyl fiber, polyvinyl alcohol fiber, polypropylene fiber and nylon fiber, and it is preferable to use nylon fiber.
본 발명의 모르타르에 사용되는 보강섬유의 길이는 6~12mm 사이의 단사섬유가 사용되는 것이 바람직하며, 1.5% 이상 사용시에는 믹서에서 섬유의 뭉침 현상(fiber ball)이 발생하여 시공성이 저하된다. The length of the reinforcing fiber used in the mortar of the present invention is preferably between 6 and 12 mm, and when the fiber is used in excess of 1.5%, a fiber ball is generated in the mixer and the workability is lowered.
나일론 섬유는 소성수축 균열 저감 뿐만 아니라 모르타르의 물성 및 내구성을 증진시킨다. Nylon fiber improves the physical properties and durability of mortar as well as reducing shrinkage cracking.
또한, 친수성을 지니고 있어 페이스트와 부착력이 우수하며, 표면마감력 및 분산성이 우수한 특성이 있다. In addition, it has a hydrophilic property, excellent in paste and adhesion, and excellent in surface finishing power and dispersibility.
나일론 섬유는 분자 내에 N이나 O에 부분적인 음전하를 띠고 있으므로 부분적인 양전하가 있는 물 분자의 H와 상호 정전기 적인 작용을 하여 시멘트 페이스트와의 결합력을 강화시키는 등의 장점이 있다.Nylon fibers have a negative electric charge in N or O in the molecule, so they have the advantage of strengthening the bonding force with the cement paste by performing a mutual electrostatic action with H of a water molecule having a partial positive charge.
상기 감수제는 혼합물의 물/시멘트비를 감소시켜 강도 및 내구성을 개선하기 위하여 사용한다. The water reducing agent is used to improve the strength and durability by reducing the water / cement ratio of the mixture.
그 종류로는 폴리카본산계, 멜라민계 또는 나프탈렌계 감수제를 사용할 수 있다. As the kind thereof, a polycarboxylic acid type, melamine type or naphthalene type water reducing agent can be used.
멜라민계 또는 나프탈렌계 감수제는 폴리카본산계 감수제에 비하여 강도 및 내구성의 개선 효과가 미미하고, 물/시멘트비 저감 효과가 크지 않으며, 수용성 합성 라텍스와 혼합하는 경우에 상용성이 떨어지는 단점이 있다. The melamine- or naphthalene-based water reducing agent has a weak improvement effect on the strength and durability as compared with the polycarboxylic acid-based water reducing agent and has a disadvantage in that the water / cement ratio reduction effect is not large and compatibility with water-soluble synthetic latex is poor.
그러므로 상기 감수제는 폴리카본산계 감수제를 사용하는 하는 것이 바람직하다.Therefore, it is preferable to use a polycarboxylic acid-based water reducing agent as the water reducing agent.
상기 수축저감제는 보수모르타르의 수축을 줄이기 위해 사용되며 CSA계 팽창재와 무수석고(CaSO4)를 사용한다. The shrinkage reducing agent is used to reduce shrinkage of the repair mortar, and CSA-based expansion agent and anhydrous gypsum (CaSO 4 ) are used.
여기서, 상기 팽창재의 사용량이 지나치게 많으면 모르타르의 팽창을 유도해서 균열 및 부착력 저하가 발생할 수 있으며, 그 양이 적으면 건조수축에 대한 저항성이 떨어져 건조 및 소성수축에 대해 균열이 발생할 수 있으므로 적절한 양의 팽창재를 첨가하는 것이 바람직하다.If the amount of the expanding agent used is too large, the expansion of the mortar may induce cracks and adhesion deterioration. If the amount of the expanding agent is too small, the resistance to drying shrinkage may be low and cracks may occur due to drying and plastic contraction. It is preferable to add an expanding agent.
또한, 상기 콘크리트 구조물 보수용 수용성 라텍스 모르타르를 구성하는 성분 중 수용성 라텍스는 SB라텍스 고형분 47 중량부와 물 53 중량부를 혼합하는 것이 특히 바람직하다.The water-soluble latex among components constituting the water-soluble latex mortar for repairing concrete structures is particularly preferably mixed with 47 parts by weight of SB latex solids and 53 parts by weight of water.
그리고 상기 라텍스 개질 모르타르는 도막 두께가 5~10㎜ 정도 형성되도록 도포하는 것이 바람직하다.It is preferable that the latex modified mortar is applied so that the thickness of the latex modified mortar is about 5 to 10 mm.
또한, 상기 라텍스 개질 모르타르는 수용성 합성라텍스 5~15 중량%, 시멘트 혼합물 81~87 중량%, 물 4~8중량%로 이루어진 것이 바람직하다.The latex modified mortar preferably comprises 5 to 15% by weight of a water-soluble synthetic latex, 81 to 87% by weight of a cement mixture, and 4 to 8% by weight of water.
이는 수용성 합성 라텍스 함량이 5% 미만의 경우, 보수재료로서의 성능을 기대하기 어려우며, 15%를 초과하면 점착성이 증가하여 작업하기 어려우며, 라텍스를 분산시키기 위한 분산제를 사용해야 하기 때문에 경제적, 시공적 측면에서 불리하게 된다.If the content of the water-soluble synthetic latex is less than 5%, it is difficult to expect the performance as a maintenance material. If the content of the water-soluble synthetic latex is more than 15%, it becomes difficult to work because of increased viscosity and dispersant for dispersing latex. Disadvantage.
이하, 상기한 바와 같은 구성 및 제조로 이루어진 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 시공에 대해 설명한다.Hereinafter, the construction of water-soluble latex mortar for repairing concrete structures according to the present invention will be described.
본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 시공방법은 대상 콘크리트 구조물의 불순물, 레이턴스 및 열화부위를 핸드워터젯 또는 고압수 세척기로 제거하는 단계(S Ⅰ); 상기 콘크리트 구조물의 표면에 프라이머를 도포하는 단계(S Ⅱ); 상기 프라이머 상부에 콘크리트 구조물 보수용 수용성 라텍스 모르타르을 타설하여 단면을 복구하는 단계(S Ⅲ); 상기 단면이 복구된 콘크리트 구조물의 표면을 마무리하고 표면보호제를 도포하여 마무리하는 단계(S Ⅳ)로 이루어진다.The water soluble latex mortar construction method for repairing concrete structures according to the present invention comprises the steps of removing impurities, laitance and deteriorated parts of a target concrete structure by hand water jet or high pressure water washing machine (S Ⅰ); Applying a primer to the surface of the concrete structure (SII); Placing a water-soluble latex mortar for repairing a concrete structure on the primer to restore a section (S III); (SIV) finishing the surface of the restored concrete structure and applying a surface protective agent to the finished concrete structure.
여기서, 상기 콘크리트 구조물의 열화부위 제거는 콘크리트 구조물의 철근 하부까지 제거하고, 상기 철근에 방청처리한다.Here, the removal of the deteriorated portion of the concrete structure is performed by removing the lower portion of the reinforcing bar of the concrete structure and rusting the reinforcing bar.
또한, 상기 콘크리트 구조물 보수용 수용성 라텍스 모르타르는 시멘트혼합물 40~45중량부와, 잔골재 36~47중량부와, 수용성 라텍스 5~15중량부로 구성된다.The water-soluble latex mortar for repairing the concrete structure is composed of 40 to 45 parts by weight of a cement admixture, 36 to 47 parts by weight of fine aggregate, and 5 to 15 parts by weight of a water-soluble latex.
그리고, 상기 시멘트혼합물은 시멘트 87.5~91.0중량부, 포졸란 반응성 혼화제 5~10중량부, 감수제 0.1~2중량부, 보강섬유 0.1~1.5중량부, 수축저감제 0.5~2.5 중량부로 구성된다.The cement mixture is composed of 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture, 0.1 to 2 parts by weight of a water reducing agent, 0.1 to 1.5 parts by weight of reinforcing fibers, and 0.5 to 2.5 parts by weight of a shrinkage reducing agent.
또한, 상기 잔골재는 강모래, 규사, 부순모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된다.The fine aggregate is composed of at least one of river sand, silica sand, crushed sand, and reclaimed fine aggregate.
그리고, 상기 수용성 라텍스는 합성라텍스 고형분 47중량부와 물 57중량부로 구성된다.The water-soluble latex is composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of water.
즉, 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 시공방법은 콘크리트 구조물의 불순물, 레이턴스, 열화된 부위 등을 핸드워터젯, 고압수 세척기 등으로 제거하는 단계(S Ⅰ)와, 제거된 부위에 프라이머를 도포처리하는 단계(S Ⅱ)와, 상기 프라이머가 도포된 상부에 상기 콘크리트 구조물 보수용 수용성 라텍스 모르타르를 타설하여 콘크리트 구조물 단면을 복구하는 단계(S Ⅲ)와, 단면이 복구된 콘크리트 구조물을 표면 마무리하고, 표면보호제를 도포하여 마무리하는 단계(S Ⅳ)를 순차적으로 시행하여 콘크리트 구조물을 보수함을 특징으로 한다.That is, the method of constructing a water soluble latex mortar for repairing concrete structures according to the present invention includes a step (S I) of removing impurities, laitance, and deteriorated parts of a concrete structure by a hand water jet or a high pressure water washing machine, A step (SII) of applying a primer (SII), a step (SIII) of restoring a cross section of the concrete structure by placing the water-soluble latex mortar for repairing the concrete structure on the upper part to which the primer is applied, And a step (S IV) of finishing the surface, applying a surface protective agent and finishing the step (S IV), in order to repair the concrete structure.
여기서, 상기 열화된 부위를 철근 하부까지 제거하고, 상기 프라이머 처리하는 단계 전에 노출된 철근을 방청처리한다. Here, the deteriorated portion is removed to a lower portion of the reinforcing bar, and the exposed reinforcing bar is rust-proofed before the primer treatment.
상기 핸드워터젯, 고압수 세척기를 이용하는 경우에 정상적인 경우에는 콘크리트 구조물의 철근이 노출되지 않지만 열화가 심한 경우에는 열화된 부위에서 철근이 노출될 수도 있는데, 이렇게 철근이 노출되는 경우에는 방청 처리하여 철근의 부식을 방지하는 것이 바람직하다.When the hand water jet or high pressure water washing machine is used, the reinforcing bars of the concrete structure are not exposed in the normal case, but the reinforcing bars may be exposed in the deteriorated areas when the deterioration is severe. It is desirable to prevent corrosion.
한편, 본 발명에 따른 콘크리트 구조물 보수용 수용성 라텍스 모르타르 시공방법은 실리카 흄 및 수용성 라텍스를 사용함으로써, 발현 강도의 증진과 시멘트 경화체의 조직 및 공극 구조를 개선하여 수밀성과 중성화, 동해, 염해 등의 저항성을 향상시키고 미세균열을 억제할 수 있다.Meanwhile, the water-soluble latex mortar construction method for repairing concrete structures according to the present invention uses silica fume and water-soluble latex to improve the strength of the expression and improve the structure and pore structure of the cement hardened body to improve resistance to watertightness, neutralization, And microcracks can be suppressed.
또한, 콘크리트 구조물 보수용 수용성 라텍스 모르타르의 유동성을 증가시켜 이송호스내 막힘현상을 최소화하여 일정한 토출량의 확보가 가능하고 기존 구조체와의 부착력이 우수하여 리바운드량 감소 및 1회 타설두께를 증가시켜 종래의 기술에 비해 시공속도의 상승 및 시공기간 단축시킬 수 있다.In addition, by increasing the fluidity of the water-soluble latex mortar for repairing concrete structures, it is possible to secure a constant discharge amount by minimizing the clogging in the transfer hose, and the adhesion with the existing structure is excellent, The construction speed can be increased and the construction time can be shortened.
Claims (14)
상기 열화부위가 제거된 콘크리트 구조물의 표면에 프라이머를 도포하는 단계(S Ⅱ);
상기 프라이머 상부에, 시멘트 87.5~91.0중량부, 실리카 흄, 플라이 애쉬 중에 1종 이상이 선택된 포졸란 반응성 혼화제 5~10중량부, 폴리카본산계 감수제 0.1~2중량부, 유리섬유, 비닐섬유, 폴리비닐알코올 섬유, 폴리프로필렌섬유, 나일론 섬유 중의 어느 하나의 길이 6~12mm의 단사섬유로 구성된 보강섬유 0.1~1.5중량부, CSA계 팽창재와 무수석고(CaSO4)로 구성된 수축저감제 0.5~2.5 중량부로 구성된 시멘트혼합물 40~45중량부와; 강모래, 규사, 부순모래, 재생잔골재 중에서 적어도 1종 이상으로 구성된 잔골재 36~47중량부와; 합성라텍스 고형분 47중량부와 물 57중량부로 구성된 수용성 라텍스 5~15중량부로 구성된 콘크리트 구조물 보수용 수용성 라텍스 모르타르에 물 4~8중량부를 혼합 교반한 콘크리트 구조물 보수용 수용성 라텍스 모르타르를 도막두께 5~10mm로 타설하여 단면을 복구하는 단계(S Ⅲ);
상기 단면이 복구된 콘크리트 구조물의 표면에 표면보호제를 도포하여 마무리하는 단계(S Ⅳ)로 이루어짐을 특징으로 하는 콘크리트 구조물 보수용 수용성 라텍스 모르타르 시공방법.Removing the impurity, the laitance, and the deteriorated portion of the target concrete structure using a hand water jet or a high-pressure water washing machine, removing the deteriorated portion of the concrete structure to the lower portion of the reinforcing bar of the concrete structure, I);
Applying a primer (SII) to the surface of the concrete structure from which the deteriorated portion has been removed;
Wherein the primer is provided on the primer with a mixture of 87.5 to 91.0 parts by weight of cement, 5 to 10 parts by weight of a pozzolanic reactive admixture selected from at least one of silica fume and fly ash, 0.1 to 2 parts by weight of a polycarboxylic acid-based water reducing agent, 0.1 to 1.5 parts by weight of reinforcing fibers composed of monofilament fibers having a length of 6 to 12 mm in any one of an alcohol fiber, a polypropylene fiber and a nylon fiber, 0.5 to 2.5 parts by weight of a shrinkage reducing agent composed of a CSA-based expansion material and anhydrous gypsum (CaSO 4 ) 40 to 45 parts by weight of the cement admixture constituted; 36 to 47 parts by weight of a fine aggregate composed of at least one kind selected from river sand, silica sand, crushed sand and regenerated fine aggregate; Water-soluble latex mortar for repairing a concrete structure, which is prepared by mixing 4 to 8 parts by weight of water with water-soluble latex mortar for repairing concrete structure composed of 47 parts by weight of a synthetic latex solid and 57 parts by weight of water, and 5 to 15 parts by weight of water, (SIII); < / RTI >
And a step (SIV) of applying a surface protective agent to the surface of the recovered concrete structure to finish the step (SIV).
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