KR102347276B1 - Light-weight mortar composition for repairing with improved fire proof, durability and workability and construction method of repairing concrete structure using the same - Google Patents
Light-weight mortar composition for repairing with improved fire proof, durability and workability and construction method of repairing concrete structure using the same Download PDFInfo
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- KR102347276B1 KR102347276B1 KR1020190160039A KR20190160039A KR102347276B1 KR 102347276 B1 KR102347276 B1 KR 102347276B1 KR 1020190160039 A KR1020190160039 A KR 1020190160039A KR 20190160039 A KR20190160039 A KR 20190160039A KR 102347276 B1 KR102347276 B1 KR 102347276B1
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- concrete structure
- repairing
- mortar composition
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland 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
- C04B14/14—Minerals of vulcanic origin
- C04B14/16—Minerals of vulcanic origin porous, e.g. pumice
-
- 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
- C04B14/22—Glass ; Devitrified glass
- C04B14/24—Glass ; Devitrified glass porous, e.g. foamed glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
-
- 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
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0016—Granular materials, e.g. microballoons
- C04B20/002—Hollow or porous granular materials
- C04B20/004—Hollow or porous granular materials inorganic
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1033—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/02—Elements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- 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
- C04B28/14—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
- C04B28/16—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 containing anhydrite, e.g. Keene's cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/50—Defoamers, air detrainers
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/56—Opacifiers
- C04B2103/58—Shrinkage reducing agents
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
본 발명은 내화성, 내구성 및 작업성이 우수한 보수용 경량 모르타르 조성물 및 이를 이용한 콘크리트 구조물의 보수 공법에 관한 것으로서, 더욱 상세하게는 시멘트 100 중량부에 대하여 규사 50~250 중량부, 실리카 흄 0.1~8 중량부, 폴리머 1~10 중량부, 보강섬유 0.5~5.0 중량부; 칼슘알루미나설파이트(CSA) 1~10 중량부; 무수석고 1~10 중량부; 수축저감제 0.5~2.0 중량부; 소포제 0.1~1.0 중량부; 개질유황 0.1~5 중량부; 팽창폴리머 비드 0.01~0.2 중량부; 감수제 0.1~0.5 중량부; 및 유리분말을 가공 처리한 다공성 골재 1~5 중량부;를 포함하는 콘크리트 구조물 보수용 경량 모르타르 조성물 및 상기 조성물을 이용한 콘크리트 구조물의 보수 공법을 제공한다.
본 발명에 따른 내진 보강용 모르타르 조성물은 발수 효과를 높이고 흡수율을 낮추어 내구성을 향상시킬 수 있도록 코어-쉘 구조의 다공성 골재를 모르타르 조성물에 포함시킴으로써 초기 및 장기 내구성, 내수성 및 내후성을 우수하게 유지할 수 있고, 콘크리트 구조물에 대한 시공성을 향상시키기 위하여 경량 골재를 사용하여 모르타르 조성물을 구성함에 의해 충격이나 진동이 가해지는 터널, 교량, 건물, 철도 구조물 등에 대한 시공시에도 신속한 시공이 가능하기 때문에 시공성 및 작업성이 매우 우수하며, 조성물의 수축성을 낮추고 빠른 시간 안에 강도를 발현할 수 있고, 모르타르 조성물에 보강섬유와 분말 수지를 포함함으로써 초기 및 장기 부착 성능과 균열 저항성을 향상시켜 장기 내구성을 더욱 향상시킬 수 있는 효과가 있다. 또한, 개질 유황을 포함함으로써 내구성, 내화학성, 내화성 등의 물성을 향상시킬 수 있는 효과도 있으며, 특히, 진동이 심한 철도 현장이나, 철도 관련 콘크리트 구조물에 있어서는 부착강도 등 물성이 강화되므로 모르타르 탈락이 발생하는 등 내구성이 부족한 문제점을 개선할 수 있는 장점이 있다. The present invention relates to a lightweight mortar composition for repair excellent in fire resistance, durability and workability, and a method for repairing a concrete structure using the same, and more particularly, 50 to 250 parts by weight of silica sand, 0.1 to 8 parts by weight of silica fume based on 100 parts by weight of cement. parts by weight, 1 to 10 parts by weight of polymer, 0.5 to 5.0 parts by weight of reinforcing fibers; 1 to 10 parts by weight of calcium alumina sulfite (CSA); 1-10 parts by weight of anhydrite; 0.5-2.0 parts by weight of shrinkage reducing agent; 0.1 to 1.0 parts by weight of an antifoam; 0.1 to 5 parts by weight of modified sulfur; 0.01 to 0.2 parts by weight of expanded polymer beads; 0.1-0.5 parts by weight of a water reducing agent; and 1 to 5 parts by weight of porous aggregate processed with glass powder; provides a lightweight mortar composition for repairing a concrete structure, and a method for repairing a concrete structure using the composition.
The mortar composition for earthquake-resistant reinforcement according to the present invention can maintain excellent initial and long-term durability, water resistance and weather resistance by including a core-shell structure porous aggregate in the mortar composition to improve durability by increasing water repellency and lowering water absorption, In order to improve the workability of concrete structures, by constructing a mortar composition using lightweight aggregates, rapid construction is possible even in tunnels, bridges, buildings, and railway structures to which shock or vibration is applied, so constructability and workability This is very good, it can lower the shrinkage of the composition and express strength in a short time, and by including reinforcing fibers and powder resin in the mortar composition, it can improve the initial and long-term adhesion performance and crack resistance to further improve long-term durability. It works. In addition, the inclusion of modified sulfur also has the effect of improving physical properties such as durability, chemical resistance, and fire resistance. There is an advantage in that problems such as insufficient durability can be improved.
Description
본 발명은 건설 재료 분야에 관한 것으로서, 상세하게는 터널 등의 콘크리트 구조물을 보수하기 위한 보수용 경량 모르타르 조성물 및 이를 이용한 콘크리트 구조물의 보수 공법에 관한 것이다.The present invention relates to the field of construction materials, and more particularly, to a lightweight mortar composition for repair for repairing concrete structures such as tunnels, and a method for repairing concrete structures using the same.
일반적으로 콘크리트 구조물은 시간의 경과에 따라 외부 하중, 진동, 자외선, 비 등 여러 외부 요인에 의해 열화가 진행되어 구조적 안정성 문제가 대두되는바, 이에 열화된 콘크리트 구조물은 보수용 모르타르 등을 이용하여 보수 및 보강되고 있다. In general, concrete structures deteriorate over time by various external factors such as external loads, vibrations, ultraviolet rays, and rain, and structural stability problems arise. and being reinforced.
특히 일반 도로용 터널이나 철도용 터널, 수로 터널 등의 터널은 복공 콘크리트 내벽, 바닥 등에 년수가 지남에 따른 마모, 세굴, 단락 등의 열화가 발생할 수 있으므로 보수 공사를 통해 보수 시공을 하지 않으면 대형 사고가 발생될 위험이 잔존한다. In particular, in tunnels such as general road tunnels, railway tunnels, and waterway tunnels, deterioration such as abrasion, scouring, and short circuits may occur over the years on the inner wall and floor of the double-walled concrete. The risk of occurrence remains.
기존의 터널 보수 공사는 보통 이동식의 센터 형틀을 설치하여 펌프 등을 이용해 모르타르를 주입, 충전하는 방법이 사용되고 있는데, 교통을 통제해야 하므로 교통량이 적은 야간을 이용해 보수용 모르타르를 신속히 시공하는 것이 필요하다. In the existing tunnel repair work, the method of injecting and charging mortar using a pump, etc. by installing a movable center frame is usually used. However, it is necessary to quickly construct the repair mortar at night when traffic is low because traffic must be controlled. .
이러한 보수용 모르타르는 작업성을 위해 고유동성과 속경성이 필요하며, 고속의 철도 차량이 통과하므로 내충격성, 내마모성, 내구성, 내진성의 특성이 필요한 동시에 단락의 위험성을 줄이기 위해 경량성이 필요하고 화재에 대한 저항성도 필요한 특성이 있다. These repair mortars require high fluidity and fast hardness for workability, and since high-speed rail vehicles pass through, impact resistance, abrasion resistance, durability, and earthquake resistance are required. There is also a characteristic that requires resistance to
이 경우 기존 구조체와의 부착성과 압축강도 등 물성이 확보되어야 하며, 동시에 경량 특성을 발휘해야 하는데, 실질적으로 경량 특성과 물성 간에는 동시에 만족시키는 것이 쉽지는 않은 상황이다. In this case, physical properties such as adhesion to the existing structure and compressive strength must be secured, and lightweight properties must be exhibited at the same time.
보수용 모르타르를 이용하여 터널 등 콘크리트 구조물을 보수하기 위한 기술에 관하여 많은 기술들이 많이 제안되고 있다. (예를 들어, 대한민국 등록특허 제10-1655108호, 제10-1746220호, 제10-0899843호, 제10-1419445호 등)Many technologies have been proposed with respect to the technology for repairing concrete structures such as tunnels using repair mortar. (For example, Korean Patent Registration Nos. 10-1655108, 10-1746220, 10-0899843, 10-1419445, etc.)
그러나, 기존 기술들에서 제안된 보수재는 조성물 간의 치밀성이 부족하여 구체와의 부착성과 일체성 확보 효과가 충분하지 않아 부착강도, 압축강도, 휨강도 등의 물성에 대한 충분한 확보가 어렵고, 특히 경량성과 요구 물성 간의 밸런스를 만족하는 기술은 아직까지는 존재하지 않은 상황이다. However, since the repair materials proposed in the existing technologies lack the compactness between the compositions, the effect of securing adhesion and integrity with the sphere is not sufficient, so it is difficult to secure sufficient physical properties such as adhesion strength, compressive strength, and flexural strength. A technology that satisfies the balance between physical properties does not yet exist.
본 발명은 상기와 같은 종래 기술의 상황을 고려하여 개발된 것으로서, 내구성, 내충격성, 부착강도, 압축강도 등의 물성이 우수하며, 내화성, 내마모성도 우수한 동시에 경량성의 확보로 인해 단락의 위험성을 줄이고 작업성을 개선한 보수용 모르타르 조성물과 이를 이용하여 터널 등 콘크리트 구조물을 보수하는 공법을 제공하고자 한다. The present invention was developed in consideration of the conditions of the prior art as described above, and has excellent physical properties such as durability, impact resistance, adhesion strength, and compressive strength, and has excellent fire resistance and abrasion resistance. An object of the present invention is to provide a repair mortar composition with improved workability and a method for repairing concrete structures such as tunnels using the same.
상기 과제를 달성하기 위하여 본 발명의 일 구현예는 In order to achieve the above object, one embodiment of the present invention is
시멘트 100 중량부에 대하여 규사 50~250 중량부, 실리카 흄 0.1~8 중량부, 폴리머 1~10 중량부, 보강섬유 0.5~5.0 중량부; 칼슘알루미나설파이트(CSA) 1~10 중량부, 무수석고 1~10 중량부; 수축저감제 0.5~2.0 중량부; 소포제 0.1~1.0 중량부; 개질유황 0.1~5 중량부; 팽창폴리머 비드 0.01~0.2 중량부; 감수제 0.1~0.5 중량부; 및 유리분말을 가공 처리한 다공성 골재 1~5 중량부;를 포함하는 콘크리트 구조물 보수용 경량 모르타르 조성물을 제공한다. 50 to 250 parts by weight of silica sand, 0.1 to 8 parts by weight of silica fume, 1 to 10 parts by weight of polymer, 0.5 to 5.0 parts by weight of reinforcing fibers based on 100 parts by weight of cement; 1 to 10 parts by weight of calcium alumina sulfite (CSA), 1 to 10 parts by weight of anhydrite; 0.5-2.0 parts by weight of shrinkage reducing agent; 0.1 to 1.0 parts by weight of an antifoam; 0.1 to 5 parts by weight of modified sulfur; 0.01 to 0.2 parts by weight of expanded polymer beads; 0.1-0.5 parts by weight of a water reducing agent; and 1 to 5 parts by weight of porous aggregate processed with glass powder; provides a lightweight mortar composition for repairing concrete structures, including.
본 발명의 일 실시예에 있어서, 상기 시멘트는 포틀랜트 시멘트, 슬래그 시멘트, 알루미나 시멘트 및 초속경 시멘트 중에서 선택된 1종 또는 2종 이상의 혼합 시멘트인 것을 특징으로 한다. In one embodiment of the present invention, the cement is characterized in that one or two or more types of mixed cement selected from portland cement, slag cement, alumina cement, and super-velocity cement.
또한, 본 발명의 일 실시예에 있어서, 상기 규사는 입도의 크기가 0.3~3.0 mm 인 입자를 90~99 중량% 포함하고 모스경도(Mohs Hardness) 6.0~10.0인 것을 특징으로 한다. In addition, in one embodiment of the present invention, the silica sand contains 90 to 99% by weight of particles having a particle size of 0.3 to 3.0 mm and a Mohs Hardness of 6.0 to 10.0.
또한, 본 발명의 일 실시예에 있어서, 상기 보강섬유는 유리섬유, 강섬유, 폴리에스테르 섬유, 나일론 섬유, 폴리프로필렌(PP) 섬유, 셀룰로오스 섬유 및 폴리에틸렌 섬유 중에서 선택되는 1종 이상인 것을 특징으로 한다. Further, in one embodiment of the present invention, the reinforcing fiber is characterized in that at least one selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber, and polyethylene fiber.
본 발명의 일 실시예에 있어서, 상기 개질 유황은 유황을 개질제로 중합하여 얻어진 것을 사용하는 것을 특징으로 한다. In one embodiment of the present invention, the modified sulfur is characterized in that it uses a product obtained by polymerizing sulfur as a modifier.
이때, 상기 개질제는 디시클로펜타디엔계 개질제인 것이 바람직하다. In this case, the modifier is preferably a dicyclopentadiene-based modifier.
또한, 본 발명의 일 실시예에 있어서, 상기 팽창폴리머 비드는 EPS(Expanded Polystyrene) 비드인 것을 특징으로 한다. In addition, in one embodiment of the present invention, the expanded polymer beads are characterized in that EPS (Expanded Polystyrene) beads.
또한, 본 발명의 일 실시예에 있어서, 상기 팽창폴리머 비드는 비중이 0.1~0.8인 것을 특징으로 한다. In addition, in one embodiment of the present invention, the expanded polymer beads are characterized in that the specific gravity is 0.1 ~ 0.8.
또한, 본 발명의 일 실시예에 있어서, 상기 유리분말을 가공 처리한 다공성 골재는 수용성 수지를 스프레이 방식으로 유리분말 분쇄물에 도포하고 반죽한 후 킬른에서 소성하여 얻어진 것을 사용하는 것을 특징으로 한다. Further, in one embodiment of the present invention, the porous aggregate processed by the glass powder is characterized in that it is obtained by applying a water-soluble resin to the pulverized glass powder by a spray method, kneading it, and then calcining it in a kiln.
이때, 상기 수용성 수지는 EVA(Ethylene vinyl acetate 공중합체) 수지인 것이 바람직하다. In this case, the water-soluble resin is preferably an EVA (Ethylene vinyl acetate copolymer) resin.
또한, 본 발명의 일 실시예에 있어서, 상기 다공성 골재는 내부는 다공 구조이고 표면은 수용성 수지의 코팅층으로 이루어진 코어-쉘 2중 구조를 가지고 있는 것을 특징으로 한다. In addition, in one embodiment of the present invention, the porous aggregate has a core-shell double structure in which the inside has a porous structure and the surface is made of a coating layer of a water-soluble resin.
또한, 상기 과제를 달성하기 위하여 본 발명의 다른 구현예는In addition, another embodiment of the present invention in order to achieve the above object
콘크리트 구조물 표면의 이물질을 제거 및 정리하는 제1단계;A first step of removing and arranging foreign substances on the surface of the concrete structure;
상기 이물질이 제거된 콘크리트 구조물의 표면에 침투 방수형 보호 프라이머를 시공하는 제2단계; 및a second step of constructing a penetration waterproof protection primer on the surface of the concrete structure from which the foreign matter has been removed; and
상기 침투 방수형 보호 프라이머가 양생되어 표면의 택기가 없는 상태에서 그 표면에 본 발명에 따른 상기 콘크리트 구조물 보수용 경량 모르타르 조성물을 물과 혼합하여 시공하는 제3단계; 를 포함하는 콘크리트 구조물의 보수 공법을 제공한다. a third step of mixing and constructing the lightweight mortar composition for repairing concrete structures according to the present invention on the surface of the surface in a state in which the penetration waterproof protection primer is cured and there is no tackiness on the surface; It provides a repair method of a concrete structure comprising a.
본 발명의 일 실시예에 있어서, 상기 제2단계 이후에, 상기 침투 방수형 보호 프라이머가 시공된 콘크리트 구조물에 보강재를 설치하는 단계를 더 포함하는 것을 특징으로 한다. In one embodiment of the present invention, after the second step, it characterized in that it further comprises the step of installing a reinforcing material in the concrete structure to which the penetration waterproof protection primer is constructed.
이때, 상기 보강재는 탄성 와이어 메쉬, 탄성패드 또는 탄성봉일 수 있다. In this case, the reinforcing material may be an elastic wire mesh, an elastic pad, or an elastic bar.
또한, 본 발명의 일 실시예에 있어서, 상기 제3단계 이후에, 상기 시공된 콘크리트 구조물 보수용 경량 모르타르 조성물의 표면에 마감 코팅재를 시공하는 것을 더 포함하는 것을 특징으로 한다. In addition, in one embodiment of the present invention, after the third step, it characterized in that it further comprises constructing a finishing coating material on the surface of the lightweight mortar composition for repairing the constructed concrete structure.
이때, 상기 콘크리트 구조물은 터널일 수 있으며, 상기 터널은 일반 도로용 터널, 일반 철도용 터널 또는 고속 전철용 터널일 수 있다. In this case, the concrete structure may be a tunnel, and the tunnel may be a tunnel for a general road, a tunnel for a general railroad, or a tunnel for a high-speed train.
본 발명에 따른 내진 보수용 경량 모르타르 조성물 및 이를 이용한 콘크리트 구조물의 보수 공법의 특징 및 장점을 설명하면 다음과 같다. The characteristics and advantages of the lightweight mortar composition for earthquake-resistant repair according to the present invention and the repair method of a concrete structure using the same are described as follows.
1. 우선, 발수 효과를 높이고 흡수율을 낮추어 내구성을 향상시킬 수 있도록 코어-쉘 구조의 다공성 골재를 모르타르 조성물에 포함시킴으로써 초기 및 장기 내구성, 내수성 및 내후성을 우수하게 유지할 수 있다. 1. First, it is possible to maintain excellent initial and long-term durability, water resistance and weather resistance by including a porous aggregate having a core-shell structure in the mortar composition to improve durability by increasing water repellency and lowering water absorption.
2. 콘크리트 구조물에 대한 시공성을 향상시키기 위하여 경량 골재를 사용하여 모르타르 조성물을 구성함에 의해 충격이나 진동이 가해지는 터널, 교량, 건물, 철도 구조물 등에 대한 시공시에도 신속한 시공이 가능하기 때문에 시공성 및 작업성이 매우 우수하다. 2. In order to improve the workability of concrete structures, by constructing a mortar composition using lightweight aggregates, it is possible to quickly construct a tunnel, bridge, building, or railway structure to which shock or vibration is applied. The castle is very good.
3. 또한, 조성물의 수축성을 낮추고 빠른 시간 안에 강도를 발현할 수 있으며, 모르타르 조성물에 보강섬유와 분말 수지를 포함함으로써 초기 및 장기 부착 성능과 균열 저항성을 향상시켜 장기 내구성을 더욱 향상시킬 수 있는 효과가 있다. 3. In addition, the effect of lowering the shrinkage of the composition and expressing strength in a short time, and improving the initial and long-term adhesion performance and crack resistance by including reinforcing fibers and powdered resin in the mortar composition to further improve long-term durability there is
4. 또한, 개질 유황을 포함함으로써 내구성, 내화학성, 내화성 등의 물성을 향상시킬 수 있는 효과도 있다. 4. In addition, there is an effect that can improve physical properties such as durability, chemical resistance, fire resistance by including the modified sulfur.
5. 특히, 진동이 심한 철도 현장이나, 철도 관련 콘크리트 구조물에 있어서는 부착강도 등 물성이 강화되므로 모르타르 탈락이 발생하는 등 내구성이 부족한 문제점을 개선할 수 있는 장점이 있다. 5. In particular, in railway sites with severe vibration or in railway-related concrete structures, physical properties such as adhesion strength are strengthened, so there is an advantage in that problems with insufficient durability such as mortar falling off can be improved.
이하에서는 본 발명에 대하여 더욱 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail.
상기한 바와 같이 본 발명에 따른 콘크리트 구조물 보수용 모르타르 조성물은 시멘트 100 중량부에 대하여 규사 50~250 중량부, 실리카 흄 0.1~8 중량부, 폴리머 1~10 중량부, 보강섬유 0.5~5.0 중량부; 칼슘알루미나설파이트(CSA) 1~10 중량부; 무수석고 1~10 중량부; 수축저감제 0.5~2.0 중량부; 소포제 0.1~1.0 중량부; 개질유황 0.1~5 중량부; 팽창폴리머 비드 0.01~0.2 중량부; 감수제 0.1~0.5 중량부; 및 유리분말을 가공 처리한 다공성 골재 1~5 중량부;를 포함하여 구성된다. As described above, the mortar composition for repairing concrete structures according to the present invention contains 50 to 250 parts by weight of silica sand, 0.1 to 8 parts by weight of silica fume, 1 to 10 parts by weight of polymer, 0.5 to 5.0 parts by weight of reinforcing fibers, based on 100 parts by weight of cement. ; 1 to 10 parts by weight of calcium alumina sulfite (CSA); 1-10 parts by weight of anhydrite; 0.5-2.0 parts by weight of shrinkage reducing agent; 0.1 to 1.0 parts by weight of an antifoam; 0.1 to 5 parts by weight of modified sulfur; 0.01 to 0.2 parts by weight of expanded polymer beads; 0.1-0.5 parts by weight of a water reducing agent; and 1 to 5 parts by weight of glass powder processed porous aggregate by weight.
이하에서는, 상기 본 발명에 따른 상기 콘크리트 구조물 보수용 모르타르 조성물을 구성하는 각 성분에 관하여 구체적으로 설명한다.Hereinafter, each component constituting the mortar composition for repairing the concrete structure according to the present invention will be described in detail.
먼저, 본 발명에서 상기 시멘트는 포틀랜트 시멘트, 슬래그 시멘트, 알루미나 시멘트 및 초속경 시멘트 중에서 선택된 1 종 또는 2종 이상의 혼합 시멘트를 사용할 수 있으며, 바람직하게는 포틀랜드 시멘트이다. 구체적으로 포틀랜드 시멘트의 경우도 주요 성분이 C3S 51%, C2S 25%, C3A 9%, C4AF 9%, CaSO4 4% 정도이며, 비표면적은 3,300cm2/g 전후인 것을 사용하는 것이 바람직하다.First, in the present invention, as the cement, one type or a mixed cement of two or more types selected from portland cement, slag cement, alumina cement and super-velocity cement may be used, preferably Portland cement. Specifically, in the case of Portland cement, the main components are C 3 S 51%, C 2 S 25%, C 3 A 9%, C 4 AF 9%, CaSO 4 4%, and the specific surface area is around 3,300 cm 2 /g It is preferable to use a
혼합 시멘트를 사용할 경우에는 포틀랜트 시멘트 40~70 중량%, 슬래그 시멘트 20 ~ 40 중량%, 알루미나 시멘트 5 ~ 25 중량% 및 잔량의 속경성 시멘트를 포함할 수 있다. When mixed cement is used, 40 to 70% by weight of portland cement, 20 to 40% by weight of slag cement, 5 to 25% by weight of alumina cement, and the remaining amount of fast-setting cement may be included.
이중에서 슬래그 시멘트는 수산화칼슘이나 황산염의 자극작용에 의한 수화열에 의한 온도상승 억제, 알칼리 실리카반응의 억제, 황산염 및 해수에 대한 화학저항성, 염화물 이온이나 산소 침투 저항성을 향상시키는 역할을 한다.Among them, slag cement plays a role in suppressing the temperature rise due to the heat of hydration due to the stimulating action of calcium hydroxide or sulfate, suppressing the alkali silica reaction, improving the chemical resistance to sulfate and seawater, and improving the chloride ion or oxygen permeation resistance.
또한, 알루미나 시멘트는 보통 포틀랜드 시멘트에 비해 알루미나 함량이 상대적으로 높은 시멘트로서, 화학적 저항성이 우수하며, 산성 분위기 하에서 사용할 수 있는 장점이 있으며, 경화시간이 짧은 조강 시멘트 일종으로서, 보통 포틀랜드 시멘트와 적정 비율로 사용한다. In addition, alumina cement is a cement with a relatively high alumina content compared to normal Portland cement, has excellent chemical resistance, has the advantage of being able to be used in an acidic atmosphere, and is a type of crude steel cement with a short curing time. use it as
본 발명에서 상기 규사는 입도의 크기가 0.3~3.0 mm 인 입자를 90~99 중량% 포함하고 모스경도(Mohs Hardness) 6.0 이상, 바람직하게는 6.0~10.0인 것을 사용하는 것이 바람직하다. In the present invention, the silica sand contains 90 to 99 wt% of particles having a particle size of 0.3 to 3.0 mm and has a Mohs Hardness of 6.0 or more, preferably 6.0 to 10.0.
본 발명에서 상기 실리카 흄(Silica fume)은 평균 입경 0.1~0.5 mm 정도로 이루어진 완전 구형에 가까운 입자로서 비정질의 활성 실리카이며, 수산화칼슘과 반응하여 상온에서 함수 규산 칼슘으로 변화함으로써 수퍼 포졸란 성질을 띤다. In the present invention, the silica fume is a particle close to a perfectly spherical shape consisting of an average particle diameter of about 0.1 to 0.5 mm, and is an amorphous active silica, which reacts with calcium hydroxide to change into a hydrous calcium silicate at room temperature, thereby exhibiting super pozzolanic properties.
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 due to the ball bearing effect by the spherical particles, and to improve the watertightness and strength due to the filling effect of silica fume between the cement particles, and to increase the strength of the shotcrete. This is because there are effects such as reducing the amount of ground, suppressing alkali silica reaction, and improving chemical resistance by improving adhesion.
본 발명에서 상기 폴리머는 모르타르 성분 간 상용성, 부착성을 증대시켜서 모르타르의 물성을 향상시키는 역할을 하며, 폴리비닐아세테이트, 폴리비닐아세테이트 실란 말단화 중합체, 폴리비닐알코올, 폴리비닐에스테르 실란 말단화 중합체, 메타크릴산 메틸-아크릴산 부틸 및 스티렌-부타디엔 고무 라텍스 중에서 선택된 1종 이상을 사용할 수 있으며, 바람직하게는 폴리비닐아세테이트, 폴리비닐알코올, 메타크릴산 메틸-아크릴산 부틸 및 스티렌-부타디엔 고무 라텍스 중에서 선택된 1종 이상을 사용할 수 있다. 본 발명에서 상기 폴리머의 사용량은 상기 시멘트 100 중량부에 대하여 1 내지 10 중량부의 범위에서 사용하는 것이 바람직하다. In the present invention, the polymer serves to improve the physical properties of the mortar by increasing compatibility and adhesion between mortar components, and polyvinyl acetate, polyvinyl acetate silane-terminated polymer, polyvinyl alcohol, polyvinyl ester silane-terminated polymer , methyl methacrylate-butyl acrylate, and styrene-butadiene rubber latex may be used at least one selected from the group consisting of polyvinyl acetate, polyvinyl alcohol, methyl methacrylate-butyl acrylate and styrene-butadiene rubber latex. One or more types may be used. In the present invention, the amount of the polymer is preferably used in the range of 1 to 10 parts by weight based on 100 parts by weight of the cement.
본 발명에서 상기 보강섬유는 휨 강도, 인장 강도 증진은 물론 양생 시 표면 크랙(균열)을 줄일 수 있어 모르타르 시공 후 초기 시공 안정성에 효과적이며, 초기 분산성을 높이기 위한 목적으로 사용된다. 본 발명에서 상기 보강섬유는 일정 정도의 친수성을 갖는 섬유를 사용하는 것이 바람직한데, 예를 들어 유리섬유, 강섬유, 폴리에스테르 섬유, 나일론 섬유, 폴리프로필렌(PP) 섬유, 셀룰로오스 섬유 및 폴리에틸렌 섬유 중에서 선택되는 1종 이상을 사용하는 것이 바람직하나, 이에 한정되는 것은 아니다. In the present invention, the reinforcing fiber is effective for initial construction stability after mortar construction as it can reduce surface cracks (cracks) during curing as well as increase flexural strength and tensile strength, and is used for the purpose of increasing initial dispersibility. In the present invention, it is preferable to use a fiber having a certain degree of hydrophilicity as the reinforcing fiber, for example, glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber, and polyethylene fiber It is preferable to use one or more of the following, but is not limited thereto.
본 발명에서 상기 칼슘알루미나설파이트는 물과 혼합되어 수화하면 콘크리트 수축을 보상하는 현상이 발생하여 모르타르의 균열을 방지하고 조직을 치밀하게 하는 역할을 한다. In the present invention, when the calcium alumina sulfite is mixed with water and hydrated, a phenomenon of compensating for concrete shrinkage occurs, thereby preventing cracking of the mortar and making the structure dense.
본 발명에서 상기 무수석고는 모르타르 조성물의 초기 부착성을 향상시켜 모재에의 부착강도를 증진시키는 역할을 한다. In the present invention, the anhydrite serves to improve the initial adhesion of the mortar composition to increase the adhesion strength to the base material.
본 발명에서 상기 수축저감제는 분자량 100 이상으로 2개 이상의 수산기를 갖는 것을 사용하는 것이 바람직하며, 예를 들어 네오펜틸글리콜(Neopentyl glycol)을 사용할 수 있다. 상기 네오펜틸글리콜은 대칭형의 2개의 알코올 기와 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, it is preferable to use the shrinkage reducing agent having a molecular weight of 100 or more and having two or more hydroxyl groups, for example, neopentyl glycol may be used. The neopentyl glycol has two symmetrical alcohol groups and two methyl groups at the alpha carbon position, thereby showing excellent reactivity in the esterification reaction. In the present invention, the neopentyl glycol may be used in the form of a flake composed of 100% white crystals or a slurry composed of 90% neopentyl glycol and 10% water.
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 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. 본 발명에서 상기 재유화형 분말수지는 콘크리트 구조체와의 일체화를 위한 접착성, 공극 충진에 의한 물 및 유해 물질의 침투 방지성 및 내마모성, 휨 및 충격에 대한 저항성, 재료 분리를 방지하는 점성 부여 등의 역할을 하는 것으로서, EVA(Ethylene vinyl acetate), SBR(Styrene butadienerubber)또는 아크릴계를 사용할 수 있고, 조성물 중 약 1~10 중량부의 범위로 포함되는 것이 바람직하다. In the present invention, the antifoaming agent is a component used to improve the strength and appearance of the mortar by removing the macropores in the mortar. Generally, an oily substance with low volatility and high diffusion power or a water-soluble surfactant is used, for example, kerosene , mineral oil-based antifoaming agents such as liquid paraffin; Oil-and-oil-based antifoaming agents such as animal and vegetable oils, sesame oil, castor oil, and their alkylene oxide adducts; fatty acid-based antifoaming agents such as oleic acid, stearic acid and their alkylene oxide adducts; fatty acid ester antifoaming agents such as glycerin monoricinolate, alkenyl succinic acid fluid, sorbitol monolaurate, sorbitol trioleate, and natural wax; Polyoxyalkylenes, (poly)oxyalkyl ethers, acetylene ethers, (poly)oxyalkylene fatty acid esters, (poly)oxyalkylene sorbitan fatty acid esters, (poly)oxyalkylenealkyl (aryl) ether oxyalkylene-based antifoaming agents such as sulfate ester salts, (poly)oxyalkylenealkyl phosphate esters, (poly)oxyalkylenealkylamines, and (poly)oxyalkyleneamide; alcohol-based antifoaming agents such as octyl alcohol, hexadecyl alcohol, acetylene alcohol, glycols and the like; amide-based antifoaming agents such as acrylate polyamines; phosphate ester-based antifoaming agents such as tributyl phosphate and sodium octyl phosphate; metal soap-based antifoaming agents such as aluminum stearate and calcium oleate; Silicone-based 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. In the present invention, the re-emulsifying powder resin has adhesion for integration with concrete structures, penetration prevention and abrasion resistance of water and harmful substances by void filling, resistance to bending and impact, and viscosity to prevent material separation. As a role, EVA (Ethylene vinyl acetate), SBR (Styrene butadienerubber) or acrylic may be used, and it is preferably included in the range of about 1 to 10 parts by weight of the composition.
본 발명에서 상기 개질유황은 유황을 예를 들어 디시클로펜타디엔계 개질제 등을 이용하여 중합시켜 얻어진 개질 유황을 사용할 수 있으며, 개질유황은 내구성, 내화학성 등의 일반 물성을 향상시키는 역할을 한다. 개질유황의 사용량은 전체 조성물 중에 약 0.1~5 중량부의 범위로 포함되는 것이 바람직하다. In the present invention, the modified sulfur may be a modified sulfur obtained by polymerizing sulfur using, for example, a dicyclopentadiene-based modifier, and the modified sulfur serves to improve general physical properties such as durability and chemical resistance. The amount of the modified sulfur used is preferably included in the range of about 0.1 to 5 parts by weight in the total composition.
본 발명에서 상기 팽창폴리머 비드는 예를 들어 EPS(Expanded Polystyrene) 비드를 사용할 수 있으며, 비중은 0.1~0.8에 해당하는 경량비드를 사용하는 것이 바람직하다. 이러한 팽창폴리머 비드는 모르타르의 하중을 감소시켜 보수시 모르타르 탈락의 문제를 해소할 수 있는 장점이 있으며, 또한 접착제의 사용량을 줄일 수 있는 장점도 있다. 본 발명에서 상기 팽창폴리머 비드는 조성물 중에서 약 0.01~0.2 중량부의 범위로 포함되는 것이 바람직하다. In the present invention, the expanded polymer beads may be, for example, EPS (Expanded Polystyrene) beads, and it is preferable to use a lightweight bead having a specific gravity of 0.1 to 0.8. Such expanded polymer beads have the advantage of reducing the load on the mortar to solve the problem of mortar falling off during repair, and also have the advantage of reducing the amount of adhesive used. In the present invention, the expanded polymer beads are preferably included in the range of about 0.01 to 0.2 parts by weight in the composition.
본 발명에서 상기 감수제는 물-시멘트 비율을 감소시켜 유동성을 확보하고 내구성 저하를 방지하는 역할을 하며, 나프탈렌계, 멜라민계, 술폰산계, 폴리카르본산계 감수제 등을 시용할 수 있다. 상기 감수제는 조성물 중에서 약 0.1~0.5 중량부의 범위로 포함되는 것이 바람직하다. In the present invention, the water-reducing agent reduces the water-cement ratio to secure fluidity and prevent deterioration of durability, and naphthalene-based, melamine-based, sulfonic acid-based, and polycarboxylic acid-based water-reducing agents can be applied. The water reducing agent is preferably included in the composition in an amount of about 0.1 to 0.5 parts by weight.
본 발명에서 상기 유리분말을 가공 처리한 다공성 골재는 수용성 수지를 스프레이 방식으로 유리분말 분쇄물에 도포하고 반죽한 후 킬른에서 소성하여 얻어진 것을 사용하되, 상기 수용성 수지는 EVA(Ethylene vinyl acetate 공중합체) 수지를 이용하여 유리분말 분쇄물의 표면에 코팅한 것을 사용하는 것이 바람직하다. 유리분말은 예를 들어 폐유미분말을 미세하게 분쇄한 것을 사용할 수 있으며, 이러한 분쇄물에 수용성 수지를 스프레이하고 이를 페이스트 상태로 반죽한 후 킬른을 이용해 소성 처리한 것을 사용할 수 있다. 이때 소성 온도는 유리상에는 다공 구조를 형성하되 표면의 수용성 수지는 분해시키지 않는 온도 범위에서 진행하는 것이 바람직하다. 이러한 소성 이후에는 사이즈별로 분리하기 위해 시빙(sieving) 과정을 더 진행할 수도 있다. In the present invention, the glass powder processed porous aggregate is obtained by applying and kneading a water-soluble resin to a pulverized glass powder by a spray method, and then calcining in a kiln, wherein the water-soluble resin is EVA (Ethylene vinyl acetate copolymer) It is preferable to use a resin coated on the surface of the pulverized glass powder. As the glass powder, for example, finely pulverized waste oil powder may be used, and a water-soluble resin may be sprayed on the pulverized material, kneaded into a paste state, and then calcined using a kiln may be used. In this case, the firing temperature is preferably carried out in a temperature range that forms a porous structure on the glass but does not decompose the water-soluble resin on the surface. After the firing, a sieving process may be further performed in order to separate them by size.
이렇게 유리 분말을 가공 처리한 다공성 골재는 소성 처리에 의해 내부는 다공 구조를 갖지만, 표면은 수용성 수지로 코팅된 코어-쉘 구조의 2중 구조를 갖는 것을 특징으로 한다. 즉, 수용성 수지를 스프레이 방식으로 유리분말 분쇄물에 도포하고 반죽한 후 킬른에서 소성하여 얻어진 것을 사용하되, 상기 수용성 수지는 EVA(Ethylene vinyl acetate 공중합체) 수지이고, 상기 수용성 수지를 이용하여 유리분말 분쇄물에 스프레이하고 페이스트 상태로 반죽한 후 킬른을 이용해 소성 처리한 것으로서, 소성 온도가 유리상에는 다공 구조를 형성하되 표면의 수용성 수지는 분해시키지 않는 온도 범위에서 소성 처리함으로써 내부는 다공 구조를 갖지만 표면은 수용성 수지로 코팅된 코어-쉘 구조의 2중 구조를 갖게 된다.The porous aggregate obtained by processing the glass powder in this way has a porous structure inside by firing treatment, but has a double structure of a core-shell structure coated with a water-soluble resin on the surface. That is, a water-soluble resin is applied to the pulverized glass powder by a spray method, kneaded, and then calcined in a kiln, wherein the water-soluble resin is EVA (Ethylene vinyl acetate copolymer) resin, and glass powder using the water-soluble resin It is a product that is sprayed on the pulverized material and kneaded into a paste state, and then fired using a kiln. The firing temperature forms a porous structure on the glass but does not decompose the water-soluble resin on the surface. Silver has a double structure of a core-shell structure coated with a water-soluble resin.
이러한 유리 분말은 또한 소성 처리에 의해 구형에 가까운 형태를 하고 있으므로 경량체이지만 강도, 내구성 등의 물성 저하는 최소화될 수 있는 동시에, 다공 구조를 하고 있지만 표면 수지 코팅에 의해 흡수율이 줄어들기 때문에 모르타르시 물비(W/C)를 줄일 수 있는 장점이 있어 작업성이 개선되고 잉여수에 따른 문제가 개선될 수 있으며, 소성 처리로 인해 내화성, 내화학성 및 내구성이 향상되도록 하는 역할을 한다. This glass powder also has a spherical shape by firing treatment, so although it is lightweight, deterioration of physical properties such as strength and durability can be minimized. It has the advantage of reducing the water cost (W/C), so workability can be improved and problems caused by surplus water can be improved, and it serves to improve fire resistance, chemical resistance and durability due to the firing process.
본 발명은 상기와 같은 조성으로 얻어지는 모르타르 조성물에 필요에 따라 분산제 0.1 ~ 1.0 중량부, 지연제 0.01 ~ 1.0 중량부, 알칼리활성화제 0.1 ~ 1.0 중량부에서 선택되는 1종 이상의 첨가제를 더 포함할 수 있다.The present invention may further include one or more additives selected from 0.1 to 1.0 parts by weight of a dispersant, 0.01 to 1.0 parts by weight of a retarder, and 0.1 to 1.0 parts by weight of an alkali activator, as needed in the mortar composition obtained with the above composition. have.
상기 분산제는 모르타르의 입자 표면에 흡착하여 입자 표면에 전하를 주어 입자들끼리 상호 반력을 일으키므로, 응집된 입자를 분산시켜 유동을 증가시켜 감수 효과로 인한 강도 증진이 가능하게 한다. 상기 분산제로서는 통상의 감수제를 사용할 수 있으며, 예를 들어 리그닌술포네이트, 폴리나프탈렌술포네이트, 폴리멜라민술포네이트 또는 폴리카복실레이트계 감수제로 이루어진 군으로부터 단독 또는 둘 이상 혼합 사용이 가능하다. 상기 분산제의 함량은 상기 시멘트 100 중량부에 대하여 0.1 ~ 1.0 중량부를 사용하는 것이 바람직하다.The dispersant is adsorbed on the particle surface of the mortar to give an electric charge to the particle surface to cause a mutual reaction force between the particles. As the dispersant, a conventional water reducing agent may be used, for example, from the group consisting of lignin sulfonate, polynaphthalene sulfonate, polymelamine sulfonate or polycarboxylate-based water reducing agent, it is possible to use alone or a mixture of two or more. The content of the dispersant is preferably 0.1 to 1.0 parts by weight based on 100 parts by weight of the cement.
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 securing workability for a certain period of time by adjusting the hydration rate of the mortar. The retarder includes boric acid and borates such as borax, sodium borate, potassium borate, gluconic acid, citric acid, tartaric acid, glucoheptonic acid, arabonic acid, malic acid or citric acid and their sodium, potassium, calcium, magnesium, ammonium, triethanolamine oxycarboxylic acids such as inorganic salts or organic salts such as these; Monosaccharides such as glucose, fructose, galactose, saccharose, xylose, abitose, lipose, and isomerized sugar, oligosaccharides such as disaccharide and trisaccharide, oligosaccharide such as dextrin, or polysaccharide such as dextran; sugars such as molasses containing these; sugar alcohols such as sorbitol; magnesium silicofluoride; phosphoric acid and its salts or boric acid esters; aminocarboxylic acids and their salts; alkali soluble protein; fumic acid; tannic acid; phenol; polyhydric alcohols such as glycerin; Aminotri(methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra(methylenephosphonic acid), diethylenetriaminepenta(methylenephosphonic acid) and alkali metal salts thereof, alkali Phosphonic acids, such as an earth metal salt, and its derivative(s), etc. can be used. It is preferable to add 0.01 to 1.0 parts 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 activator is a component affecting strength expression, and one or a mixture of two or more selected from alkali metal hydroxides, chlorides, sulfur oxides and carbonates may be used, and preferably sodium carbonate and sodium hydrogen carbonate are used. It is advantageous in terms of strength development. In the present invention, it is preferable to add 0.1 to 1.0 parts by weight of the alkali activator based on 100 parts by weight of the cement.
상기와 같이 얻어지는 본 발명에 따른 경량 모르타르 조성물을 이용하여 콘크리트 구조물의 보수 시공을 수행할 수 있다. 이하에서는 이러한 콘크리트 구조물의 보수 시공 방법에 관하여 상세히 설명한다. The repair and construction of the concrete structure can be performed using the lightweight mortar composition according to the present invention obtained as described above. Hereinafter, a method for repairing and constructing such a concrete structure will be described in detail.
먼저, 콘크리트 구조물에서 열화 등에 의해 콘크리트에 균열이 발생하여 시간이 지나게 되면 콘크리트의 압축강도와 철근의 인장강도가 점차 떨어지게 되고 균열 부위로 노출된 콘크리트는 중성화 현상이 진행되어 철근의 부식이 일어난다. 구조물의 진단 및 점검을 실시하여 이와 같은 현상이 발행하면 콘크리트 구조물을 보강해야 건물의 수명을 오랫동안 유지할 수 있다. First, cracks occur in the concrete due to deterioration in the concrete structure, and over time, the compressive strength of concrete and the tensile strength of reinforcing bars gradually decrease. If such a phenomenon occurs by performing diagnosis and inspection of the structure, the lifespan of the building can be maintained for a long time by reinforcing the concrete structure.
상기와 같은 열화된 콘크리트 구조물 또는 내진 보강이 필요한 콘크리트 구조물에서 먼저 이물질, 그리스, 레이턴스 등을 제거하고, 균열이 발생한 콘크리트와 노출된 철근을 제거하여 열화되지 않은 콘크리트가 나올 때까지 단면을 기계를 이용하여 파쇄하고 다듬는다. Remove foreign substances, grease, laitance, etc. from the deteriorated concrete structure as described above or the concrete structure requiring seismic reinforcement, remove cracked concrete and exposed reinforcing bars, and machine the cross section until undeteriorated concrete comes out. used to shred and shred.
구체적으로, 콘크리트 구조물의 보수 시공을 실시하기 전에 시공을 실시할 콘크리트 구조물(예: 터널 벽면 등)의 단면 또는 표면 상태를 점검하여 열화된 콘크리트 단면 또는 표면을 치핑하면서 페놀프탈레인 용액을 이용하여 중성화 깊이를 측정하고, 이후 중성화 반응에 의해 열화가 진행된 콘크리트 단면 또는 표면을 제거한다. Specifically, before carrying out repair or construction of a concrete structure, check the cross-section or surface condition of the concrete structure to be constructed (e.g., a tunnel wall, etc.) Measure, and then remove the concrete cross section or surface deteriorated by the neutralization reaction.
이어서, 콘크리트가 제거된 부분을 그라인딩하여 표면 작업을 진행하고 고압수를 이용하여 세척한다. 상기 고압수 작업 전에 공기 압축기를 이용하여 세척하는 공정을 추가로 둘 수 있다. Then, the surface from which the concrete has been removed is grinded to perform surface work, and then washed with high-pressure water. A process of washing using an air compressor before the high-pressure water operation may be additionally provided.
이어서, 상기와 같은 표면 정리 후에, 상기 이물질이 제거된 콘크리트 구조물의 표면에 침투 방수형 보호 프라이머를 도포 시공하여 방수층을 형성하는 과정을 진행할 수 있다. Then, after the surface cleaning as described above, the process of forming a waterproof layer by coating a penetration waterproof protection primer on the surface of the concrete structure from which the foreign substances are removed may be performed.
즉, 철근의 상태를 확인하여 철근의 부식이 심할 경우 철근 배면을 꺼내어 부식이 심한 부분에 철 브러시나 그라인더를 이용하여 부식부분(녹)을 제거하고 침투 방수형 보호 프라이머를 도포한다. 본 발명에서 상기 침투 방수형 보호 프라이머로는 카복실아민 등 아민계 프라이머를 사용하는 것이 바람직하나, 이에 한정하지 않는다. In other words, check the condition of the reinforcing bar, and if the reinforcing bar is severely corroded, take out the back side of the reinforcing bar, use an iron brush or grinder to remove the corrosive part (rust) on the severely corroded part, and apply a penetration waterproof protection primer. In the present invention, it is preferable to use an amine-based primer such as carboxylamine as the penetration waterproof protection primer, but is not limited thereto.
이어서, 선택적으로, 상기 침투 방수형 보호 프라이머가 시공된 콘크리트 구조물에 보강재를 설치할 수 있다. Then, optionally, the reinforcing material may be installed in the concrete structure on which the penetration waterproof protection primer is installed.
상기 보강재는 부식의 정도가 매우 심하여 철근으로서의 구조적 기능을 상실한 경우 철근을 절단하고 새로운 철근, 탄소봉, 로드 등의 보강재를 삽입하여 앵커 클립 등을 이용해 설치하는 공정으로서, 이 때 사용될 수 있는 보강재로는 탄성 와이어 메쉬, 탄성 패드, 탄성봉 등이 바람직하다. When the reinforcing material loses its structural function as a reinforcing bar due to a very severe degree of corrosion, the reinforcing bar is cut and a new reinforcing bar, carbon bar, rod, etc. reinforcing material is inserted and installed using an anchor clip, etc. Reinforcing materials that can be used at this time include An elastic wire mesh, an elastic pad, an elastic rod, etc. are preferable.
이어서, 상기 프라이머가 도포되고 양생되어 표면의 택기가 없는 상태에서(또는 상기 보강재가 설치된 상태에서) 콘크리트 구조물에 기계식 분사 장치를 사용하여 본 발명에 따른 상기 경량 모르타르 조성물을 분사하여 도포한다. Then, the primer is applied and cured, and the lightweight mortar composition according to the present invention is sprayed and applied to the concrete structure in a state where there is no tackiness on the surface (or in the state in which the reinforcement is installed) using a mechanical spraying device.
본 발명에서 사용될 수 있는 기계식 분사 장치로는 믹싱장비, 토출장비, 발전기 및 콤프레셔가 결합 또는 탑재된 일체형 모르타르 분사 장치를 사용하는 것이 바람직하다. As the mechanical spraying device that can be used in the present invention, it is preferable to use an integrated mortar spraying device in which a mixing device, a discharge device, a generator and a compressor are combined or mounted.
본 발명에서는 상기 얻어지는 본 발명에 따른 경량 모르타르 조성물을 시공 대상면에 도포하여 콘크리트 구조물을 보수 보강 및 내진 보강하는데, 1회 이상 반복 시공하는 경우 대상면과의 접착성을 위해 표면을 연마하여 거칠게 마감하며, 상기 도포는 스프레이 또는 흙손을 이용하여 1차 타설시 5 ~ 15 mm, 2차 및 3차 타설시 20 ~ 50 mm, 최종 타설 시 5 ~ 15 mm로 시공 및 미장하는 것이 바람직하나 상기 두께는 치핑된 콘크리트의 두께에 따라 변경 가능하다.In the present invention, the obtained lightweight mortar composition according to the present invention is applied to the construction target surface to repair and reinforce the concrete structure and to reinforce the earthquake resistance. In the case of repeated construction more than once, the surface is polished to provide a rough finish for adhesion to the target surface. It is preferable to apply the application using a spray or a trowel to 5 to 15 mm for the first pour, 20 to 50 mm for the second and third pouring, and 5 to 15 mm for the final pouring, but the thickness is It can be changed according to the thickness of the chipped concrete.
이렇게 하여 상기 콘크리트 구조물에 타설된 경량 모르타르 조성물을 양생시킴에 의해 보수 시공이 완료될 수 있다. In this way, the repair construction can be completed by curing the lightweight mortar composition poured into the concrete structure.
한편, 본 발명에서는 콘크리트 구조물의 보수 시공 후, 보수 성능의 내구성과 수명을 향상시키기 위하여 마감 코팅재를 추가로 도포하여 코팅할 수 있다. Meanwhile, in the present invention, after the repair and construction of the concrete structure, in order to improve the durability and lifespan of the repair performance, a finishing coating material may be additionally applied and coated.
본 발명에서 상기 마감 코팅재로는 아크릴-우레탄 공중합체계 코팅재를 사용할 수 있으나, 이에 한정되는 것은 아니다. 본 발명에서 상기 마감 코팅재를 도포하는 것은 상기 경량 모르타르 조성물의 도포 이후 약 1주일 정도의 시간이 지난 후에 실시할 수 있다. In the present invention, an acrylic-urethane copolymer-based coating material may be used as the finishing coating material, but the present invention is not limited thereto. In the present invention, applying the finishing coating material may be carried out after about one week has elapsed after the application of the lightweight mortar composition.
본 발명에서 상기 아크릴-우레탄 공중합체계 마감 코팅재는 내후성, 표면 강도 및 내수성 강화 효과가 매우 우수하다. 본 발명에서 상기 마감 코팅재는 20~200g/m2으로 도포하고 도포 두께는 건조 전 단계에서 50 ~ 300㎛의 두께로 도포하는 것이 바람직하다. In the present invention, the acrylic-urethane copolymer-based finishing coating material is very excellent in weather resistance, surface strength and water resistance strengthening effect. In the present invention, the finishing coating material is applied at 20 to 200 g/m 2 and the coating thickness is preferably applied to a thickness of 50 to 300 μm in the pre-drying stage.
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 based on Examples. However, the scope of the present invention is not limited by the following examples.
[실시예][Example]
(제조예 1) 모르타르 조성물 제조(Preparation Example 1) Preparation of mortar composition
포틀랜드 시멘트 100 중량부, 규사(입도 0.3~3.0mm, 경도 6 이상) 150 중량부, 실리카 흄 5.0 중량부, 폴리비닐아세테이트 폴리머 5 중량부, 유리 섬유 및 강섬유의 혼합물 1.0 중량부, 칼슘알루미나설파이트 5 중량부, 무수석고 5.0 중량부, 네오펜틸글리콜 수축저감제 1.0 중량부, 소포제 0.3 중량부, 개질유황 0.5 중량부, EPS 비드(비중 0.5) 0.1 중량부, 유리분말을 가공처리한 다공성 골재 4 중량부 및 감수제 0.2 중량부를 적당량의 물과 균일하게 혼합하여 모르타르 조성물을 제조하였다. 이때 상기 유리분말을 가공처리한 다공성 골재는 폐유리를 미세하게 분쇄한 후 EVA 수지를 스프레이하고 페이스트 상으로 반죽한 후 킬른에서 소성하여 얻어진 코어-쉘 2중 구조의 다공성 골재를 사용하였다. Portland cement 100 parts by weight, silica sand (particle size 0.3-3.0 mm, hardness 6 or more) 150 parts by weight, silica fume 5.0 parts by weight, polyvinyl acetate polymer 5 parts by weight, 1.0 parts by weight of a mixture of glass fiber and steel fiber, calcium alumina sulfite 5 parts by weight, 5.0 parts by weight of anhydrite, 1.0 parts by weight of neopentyl glycol shrinkage reducing agent, 0.3 parts by weight of an antifoaming agent, 0.5 parts by weight of modified sulfur, 0.1 parts by weight of EPS beads (specific gravity 0.5), glass powder processed porous aggregate 4 A mortar composition was prepared by uniformly mixing parts by weight and 0.2 parts by weight of a water reducing agent with an appropriate amount of water. In this case, as the porous aggregate processed with the glass powder, a core-shell double structure porous aggregate obtained by finely pulverizing waste glass, spraying EVA resin, kneading it into a paste, and calcining in a kiln was used.
(제조예 2) 모르타르 조성물 제조(Preparation Example 2) Preparation of mortar composition
포틀랜드 시멘트 100 중량부, 규사(입도 0.3~3.0mm, 경도 6 이상) 100 중량부, 실리카 흄 6.0 중량부, 폴리비닐아세테이트 폴리머 8 중량부, 유리 섬유 및 강섬유의 혼합물 2.0 중량부, 칼슘알루미나설파이트 4 중량부, 무수석고 6.0 중량부, 네오펜틸글리콜 수축저감제 1.0 중량부, 소포제 0.3 중량부, 개질유황 0.6 중량부, EPS 비드(비중 0.5) 0.15 중량부, 유리분말을 가공처리한 다공성 골재 3 중량부 및 감수제 0.2 중량부를 적당량의 물과 균일하게 혼합하여 모르타르 조성물을 제조하였다. 이때 상기 유리분말을 가공처리한 다공성 골재는 폐유리를 미세하게 분쇄한 후 수성 아크릴 수지를 스프레이하고 페이스트 상으로 반죽한 후 킬른에서 소성하여 얻어진 코어-쉘 2중 구조의 다공성 골재를 사용하였다. Portland cement 100 parts by weight, silica sand (particle size 0.3-3.0 mm, hardness 6 or more) 100 parts by weight, silica fume 6.0 parts by weight, polyvinyl acetate polymer 8 parts by weight, glass fiber and steel fiber mixture 2.0 parts by weight, calcium alumina sulfite 4 parts by weight, 6.0 parts by weight of anhydrite, 1.0 parts by weight of neopentyl glycol shrinkage reducing agent, 0.3 parts by weight of antifoaming agent, 0.6 parts by weight of modified sulfur, 0.15 parts by weight of EPS beads (specific gravity 0.5), glass powder processed porous aggregate 3 A mortar composition was prepared by uniformly mixing parts by weight and 0.2 parts by weight of a water reducing agent with an appropriate amount of water. In this case, as the porous aggregate processed with the glass powder, a core-shell double structure porous aggregate obtained by finely pulverizing waste glass, spraying an aqueous acrylic resin, kneading it into a paste, and then calcining it in a kiln was used.
(비교제조예 1) 모르타르 조성물 제조(Comparative Preparation Example 1) Preparation of mortar composition
상기 포틀랜트 시멘트 결합재 100 중량부에 평균입경이 0.1~1.0 mm인 세사로 이루어진 규사 55 중량부, 석회석(경기광업) 9.5 중량부와 적당량의 물을 혼합하여 모르타르 조성물을 제조하였다. A mortar composition was prepared by mixing 55 parts by weight of silica sand composed of fine sand having an average particle diameter of 0.1 to 1.0 mm, 9.5 parts by weight of limestone (Gyeonggi Mining) and an appropriate amount of water to 100 parts by weight of the Portland cement binder.
(비교제조예 2) 모르타르 조성물 제조(Comparative Preparation Example 2) Preparation of mortar composition
포틀랜드 시멘트 100 중량부, 고로 급냉 슬래그 및 고로 서냉 슬래그가 5:5의 중량비로 혼합된 것으로서 평균 입경이 2~10 ㎛인 합성 슬래그 미분말 20 중량부, 고분자 수지(EVA수지) 1.0 중량부, 셀룰로오스 섬유 1.0 중량부 및 탄산수소나트륨 0.5 중량부를 혼합하고 여기에 평균입경이 0.1~1.0 mm인 세사로 이루어진 규사 55 중량부, 석회석(경기광업) 9.5 중량부와 적당량의 물을 혼합하여 모르타르 조성물을 제조하였다. Portland cement 100 parts by weight, blast furnace quenching slag and blast furnace slow cooling slag are mixed in a weight ratio of 5:5, and 20 parts by weight of fine synthetic slag powder having an average particle size of 2 to 10 μm, 1.0 parts by weight of polymer resin (EVA resin), and cellulose fiber A mortar composition was prepared by mixing 1.0 parts by weight and 0.5 parts by weight of sodium bicarbonate, 55 parts by weight of silica sand consisting of fine sand having an average particle diameter of 0.1 to 1.0 mm, 9.5 parts by weight of limestone (Gyeonggi Mining) and an appropriate amount of water. .
(비교제조예 3) 모르타르 조성물 제조(Comparative Preparation Example 3) Preparation of mortar composition
포틀랜드 시멘트 65 중량부, 고로 급냉 슬래그 및 고로 서냉 슬래그가 5:5의 중량비로 혼합된 것으로서 평균 입경이 2~10 ㎛인 합성 슬래그 미분말 20 중량부, 고분자 수지(EVA수지) 1.0 중량부, 셀룰로오스 섬유 1.0 중량부 및 탄산수소나트륨 0.5 중량부, 수중불분리제(메틸셀룰로오스) 0.5 중량부, 분산제(PC계) 0.5 중량부, 소포제 0.2 중량부, 지연제(타르타르산) 0.05 중량부를 첨가하여 혼합한 후, 여기에 평균입경이 0.1~1.0 mm인 세사로 이루어진 규사 55 중량부, 석회석(경기광업) 9.5 중량부와 적당량의 물을 혼합하여 모르타르 조성물을 제조하였다. Portland cement 65 parts by weight, blast furnace quenching slag and blast furnace slow cooling slag are mixed in a weight ratio of 5:5, and 20 parts by weight of fine synthetic slag powder having an average particle diameter of 2 to 10 μm, 1.0 parts by weight of polymer resin (EVA resin), and cellulose fiber 1.0 parts by weight and 0.5 parts by weight of sodium bicarbonate, 0.5 parts by weight of a non-separating agent in water (methylcellulose), 0.5 parts by weight of a dispersant (PC-based), 0.2 parts by weight of an antifoaming agent, and 0.05 parts by weight of a retarder (tartaric acid) were added and mixed. , 55 parts by weight of silica sand consisting of fine sand having an average particle diameter of 0.1 to 1.0 mm, 9.5 parts by weight of limestone (Gyeonggi Mining) and an appropriate amount of water were mixed to prepare a mortar composition.
[실시예 1][Example 1]
손상된 콘크리트 구조물의 표면을 치핑하여 파쇄하고 그라인딩하여 표면을 정리한 후 고압세척기를 이용하여 표면을 세척하였다. 이후, 노출된 철근에 아민계 침투 방수형 보호 프라이머를 도포하고 상기 프라이머가 양생되고 표면 택기가 없는 상태에서 상기 제조예 1에서 제조한 모르타르 조성물을 도포하여 구조물의 표면까지 평활하게 도포 작업한 후 4일간 건조 양생하여 보강 시공을 마무리하였다. The surface of the damaged concrete structure was chipped, crushed, and ground to clean the surface, and then the surface was washed using a high-pressure washer. After that, an amine-based penetration waterproofing type protective primer is applied to the exposed reinforcing bar, and the mortar composition prepared in Preparation Example 1 is applied in a state where the primer is cured and there is no surface tackifier, and the surface of the structure is applied smoothly to the surface of the structure. Reinforcement construction was completed by drying and curing for one day.
[실시예 2][Example 2]
손상된 콘크리트 구조물의 표면을 치핑하여 파쇄하고 그라인딩하여 표면을 정리한 후 고압세척기를 이용하여 표면을 세척하였다. 이후, 노출된 철근에 아민계 침투 방수형 보호 프라이머를 도포하고 상기 프라이머가 양생되고 표면 택기가 없는 상태에서 상기 제조예 2에서 제조한 모르타르 조성물을 도포하여 구조물의 표면까지 평활하게 도포 작업한 후 4일간 건조 양생하여 보강 시공을 마무리하였다. The surface of the damaged concrete structure was chipped, crushed, and ground to clean the surface, and then the surface was washed using a high-pressure washer. After that, an amine-based penetration waterproofing protective primer is applied to the exposed reinforcing bar, and the mortar composition prepared in Preparation Example 2 is applied in a state where the primer is cured and there is no surface tackifier, and the surface of the structure is applied smoothly until the surface of the structure 4 Reinforcement construction was completed by drying and curing for one day.
[실시예 3][Example 3]
손상된 콘크리트 구조물의 표면을 치핑하여 파쇄하고 그라인딩하여 표면을 정리한 후 고압세척기를 이용하여 표면을 세척하였다. 이후, 노출된 철근에 아민계 침투 방수형 보호 프라이머를 도포하고 상기 프라이머가 양생되고 표면 택기가 없는 상태에서 상기 제조예 1에서 제조한 모르타르 조성물을 도포하여 구조물의 표면까지 평활하게 도포 작업한 후 4일간 건조 양생하여 보강 시공을 마무리하였다. 상기 건조 및 양생된 모르타르 표면에 마감 코팅재를 100㎛ 두께로 2회 도장한 후 경화 및 건조하여 보강 시공을 마무리하였다. The surface of the damaged concrete structure was chipped, crushed, and ground to clean the surface, and then the surface was washed using a high-pressure washer. After that, an amine-based penetration waterproofing type protective primer is applied to the exposed reinforcing bar, and the mortar composition prepared in Preparation Example 1 is applied in a state where the primer is cured and there is no surface tackifier, and the surface of the structure is applied smoothly to the surface of the structure. Reinforcement construction was completed by drying and curing for one day. After applying the finishing coating material twice to a thickness of 100 μm on the dried and cured mortar surface, it was cured and dried to finish the reinforcement construction.
[실시예 4][Example 4]
손상된 콘크리트 구조물의 표면을 치핑하여 파쇄하고 그라인딩하여 표면을 정리한 후 고압세척기를 이용하여 표면을 세척하였다. 이후, 노출된 철근에 아민계 침투 방수형 보호 프라이머를 도포하고 상기 프라이머가 양생되고 표면 택기가 없는 상태에서 상기 제조예 2에서 제조한 모르타르 조성물을 도포하여 구조물의 표면까지 평활하게 도포 작업한 후 4일간 건조 양생하여 보강 시공을 마무리하였다. 상기 건조 및 양생된 모르타르 표면에 마감 코팅재를 100㎛ 두께로 2회 도장한 후 경화 및 건조하여 보강 시공을 마무리하였다. The surface of the damaged concrete structure was chipped, crushed, and ground to clean the surface, and then the surface was washed using a high-pressure washer. After that, an amine-based penetration waterproofing protective primer is applied to the exposed reinforcing bar, and the mortar composition prepared in Preparation Example 2 is applied in a state where the primer is cured and there is no surface tackifier, and the surface of the structure is applied smoothly until the surface of the structure 4 Reinforcement construction was completed by drying and curing for one day. After applying the finishing coating material twice to a thickness of 100 μm on the dried and cured mortar surface, it was cured and dried to finish the reinforcement construction.
[비교예 1][Comparative Example 1]
실시예 1과 동일하게 실시하되, 비교제조예 1에서 제조된 모르타르 조성물을 사용하여 콘크리트 구조물의 보강 시공을 한 것만 다르게 하여 실시하였다. It was carried out in the same manner as in Example 1, except that the reinforcement construction of the concrete structure was performed using the mortar composition prepared in Comparative Preparation Example 1.
[비교예 2][Comparative Example 2]
실시예 1과 동일하게 실시하되, 비교제조예 2에서 제조된 모르타르 조성물을 사용하여 콘크리트 구조물의 보강 시공을 한 것만 다르게 하여 실시하였다. It was carried out in the same manner as in Example 1, except that the reinforcement construction of the concrete structure was performed using the mortar composition prepared in Comparative Preparation Example 2 differently.
[비교예 3][Comparative Example 3]
실시예 1과 동일하게 실시하되, 비교제조예 3에서 제조된 모르타르 조성물을 사용하여 콘크리트 구조물의 보강 시공을 한 것만 다르게 하여 실시하였다. It was carried out in the same manner as in Example 1, except that the reinforcement construction of the concrete structure was performed using the mortar composition prepared in Comparative Preparation Example 3 differently.
성능 평가performance evaluation
(1) 모르타르 조성물의 물성(1) Physical properties of mortar composition
상기 제조예 및 비교 제조예에서 제조된 모르타르를 이용하여 시험체를 제조하여 하기 시험 방법에 의해 물성을 측정하였다.A test specimen was prepared using the mortar prepared in Preparation Examples and Comparative Preparation Examples, and physical properties were measured by the following test method.
1) 흡수율, 플로우, 슬러리 밀도 : KS L 5220에 준하여 실시1) Absorption rate, flow, and slurry density: In accordance with KS L 5220
2) 휨강도 : KS F 2476「폴리머 시멘트 모르타르의 강도시험 방법」2) Flexural 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) Adhesive 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 rate: It was measured according to KS F 2424 mortar and concrete length change test method. The value of the initial construction body is set to 0, and "-" indicates the shrinkage rate, and "+" indicates the expansion rate.
그 결과를 하기 표 1에 나타내었다. The results are shown in Table 1 below.
(N/mm2)flexural strength
(N/mm 2 )
(N/mm2)compressive strength
(N/mm 2 )
(N/mm2)Adhesive strength
(N/mm 2 )
율(%)change in length
rate(%)
상기 표 1에서 보는 바와 같이 본 발명에 따른 경량 모르타르 조성물의 경우, 종래의 모르타르 조성물에 비하여 흡수율, 압축강도, 부착강도 등의 물성이 현저하게 우수한 것을 확인할 수 있다. As shown in Table 1, in the case of the lightweight mortar composition according to the present invention, it can be confirmed that the physical properties, such as water absorption, compressive strength, adhesion strength, etc. are remarkably excellent compared to the conventional mortar composition.
(2) 내진 성능 및 단면 복구 성능 평가(2) Evaluation of seismic performance and cross-section recovery performance
1) 내후성 평가1) Weatherability evaluation
ASTM G 155에 따라 400시간 측정하였다. 400 hours were measured according to ASTM G 155.
2) 표면 경도 평가2) Surface hardness evaluation
KS D 6711에 따라 연필경도를 측정하였다. 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 for continuous surface deformation (cracks, blisters, etc.) to occur in hot water at 90°C was measured.
상기 평가 결과를 표 2에 나타내었다. Table 2 shows the evaluation results.
상기 표 2에서 보는 바와 같이 본 발명에 따른 경량 모르타르 조성물을 사용하여 콘크리트 구조물을 보수 시공하고 선택적으로 그 표면에 마감 코팅재를 도포한 경우 종래의 모르타르 조성물을 사용하고 종래의 코팅제를 사용한 경우에 비하여 내후성, 표면 경도 및 내수성이 현저하게 우수함을 확인할 수 있다. As shown in Table 2 above, when a concrete structure is repaired using the lightweight mortar composition according to the present invention and a finishing coating material is selectively applied to the surface, the weather resistance compared to the case where the conventional mortar composition is used and a conventional coating agent is used. , it can be seen that the surface hardness and water resistance are remarkably excellent.
상기 표 1 및 표 2의 결과로부터 본 발명에 따른 경량 모르타르 조성물은 모르타르의 물리적 성능도 우수하고, 콘크리트와의 부착성도 뛰어나며, 내후성, 내수성 등의 물성도 우수하므로 터널 등 콘크리트 구조물의 보수 효과를 장기간 유지할 수 있고 또한 내진 성능 발휘에도 유리할 수 있음을 확인할 수 있다. From the results of Tables 1 and 2, the lightweight mortar composition according to the present invention has excellent physical performance of mortar, excellent adhesion to concrete, and excellent physical properties such as weather resistance and water resistance. It can be confirmed that it can be maintained and can also be advantageous in exhibiting seismic performance.
본 발명은 상술한 특정의 실시예에 의해 한정되지 않으며, 청구범위에 기재된 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론, 그와 같은 변경은 첨부된 청구범위에 속하는 것으로 해석되어야 한다. The present invention is not limited by the specific embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the present invention described in the claims. , such changes should be construed as falling within the scope of the appended claims.
Claims (17)
상기 시멘트는 포틀랜트 시멘트, 슬래그 시멘트, 알루미나 시멘트 및 초속경 시멘트 중에서 선택된 1종 또는 2종 이상의 혼합 시멘트이고,
상기 규사는 입도의 크기가 0.3~3.0 mm 인 입자를 90~99 중량% 포함하고 모스경도(Mohs Hardness) 6.0~10.0이며,
상기 보강섬유는 유리섬유, 강섬유, 폴리에스테르 섬유, 나일론 섬유, 폴리프로필렌(PP) 섬유, 셀룰로오스 섬유 및 폴리에틸렌 섬유 중에서 선택되는 1종 이상이고,
상기 개질 유황은 유황을 개질제로 중합하여 얻어진 것을 사용하되, 상기 개질제는 디시클로펜타디엔계 개질제인 것을 특징으로 하며,
상기 팽창폴리머 비드는 EPS(Expanded Polystyrene) 비드로서, 비중이 0.1~0.8인 것을 특징으로 하고,
상기 유리분말을 가공 처리한 다공성 골재는 수용성 수지를 스프레이 방식으로 유리분말 분쇄물에 도포하고 반죽한 후 킬른에서 소성하여 얻어진 것을 사용하되, 상기 수용성 수지는 EVA(Ethylene vinyl acetate 공중합체) 수지이고, 상기 수용성 수지를 이용하여 유리분말 분쇄물에 스프레이하고 페이스트 상태로 반죽한 후 킬른을 이용해 소성 처리한 것으로서, 소성 온도가 유리상에는 다공 구조를 형성하되 표면의 수용성 수지는 분해시키지 않는 온도 범위에서 소성 처리함으로써 내부는 다공 구조를 갖지만 표면은 수용성 수지로 코팅된 코어-쉘 구조의 2중 구조를 갖는 것을 특징으로 하는 콘크리트 구조물 보수용 경량 모르타르 조성물.
50-250 parts by weight of silica sand, 0.1-8 parts by weight of silica fume, 1-10 parts by weight of polymer, 0.5-5.0 parts by weight of reinforcing fibers based on 100 parts by weight of cement; 1 to 10 parts by weight of calcium alumina sulfite (CSA); 1-10 parts by weight of anhydrite; 0.5-2.0 parts by weight of shrinkage reducing agent; 0.1 to 1.0 parts by weight of an antifoam; 0.1 to 5 parts by weight of modified sulfur; 0.01 to 0.2 parts by weight of expanded polymer beads; 0.1-0.5 parts by weight of a water reducing agent; And 1 to 5 parts by weight of porous aggregate processed with glass powder; As a lightweight mortar composition for repairing concrete structures comprising:
The cement is one or more mixed cements selected from Portland cement, slag cement, alumina cement, and super-velocity cement,
The silica sand contains 90 to 99% by weight of particles having a particle size of 0.3 to 3.0 mm and has a Mohs Hardness of 6.0 to 10.0,
The reinforcing fiber is at least one selected from glass fiber, steel fiber, polyester fiber, nylon fiber, polypropylene (PP) fiber, cellulose fiber and polyethylene fiber,
The modified sulfur is obtained by polymerizing sulfur with a modifier, wherein the modifier is a dicyclopentadiene-based modifier,
The expanded polymer beads are EPS (Expanded Polystyrene) beads, characterized in that the specific gravity is 0.1 to 0.8,
The porous aggregate treated with the glass powder is obtained by applying and kneading a water-soluble resin to a pulverized glass powder by a spray method, and then calcining in a kiln, wherein the water-soluble resin is EVA (Ethylene vinyl acetate copolymer) resin, The water-soluble resin is sprayed onto the pulverized glass powder, kneaded into a paste, and then calcined using a kiln. The calcination temperature is within a temperature range that forms a porous structure on the glass but does not decompose the water-soluble resin on the surface. By doing so, the interior has a porous structure, but the surface is coated with a water-soluble resin and has a double structure of a core-shell structure. Lightweight mortar composition for repairing a concrete structure.
상기 이물질이 제거된 콘크리트 구조물의 표면에 침투 방수형 보호 프라이머를 시공하는 제2단계; 및
상기 침투 방수형 보호 프라이머가 양생되어 표면의 택기가 없는 상태에서 그 표면에 상기 청구항 1에 따른 콘크리트 구조물 보수용 경량 모르타르 조성물을 물과 혼합하여 시공하는 제3단계;
를 포함하는 콘크리트 구조물의 보수 공법.
A first step of removing and arranging foreign substances on the surface of the concrete structure;
a second step of constructing a penetration waterproof protection primer on the surface of the concrete structure from which the foreign matter has been removed; and
a third step of mixing and constructing the lightweight mortar composition for repairing a concrete structure according to claim 1 with water on the surface of the surface in a state in which the penetration waterproof protection primer is cured and there is no tackiness on the surface;
A method of repairing a concrete structure comprising a.
The method for repairing a concrete structure according to claim 12, further comprising, after the second step, installing a reinforcing material in the concrete structure on which the penetration waterproof protection primer is installed.
The method according to claim 13, wherein the reinforcing material is an elastic wire mesh, an elastic pad, or an elastic bar.
[13] The method according to claim 12, wherein after the third step, the method for repairing a concrete structure further comprising applying a finishing coating material to the surface of the constructed lightweight mortar composition for repairing a concrete structure.
The method according to claim 12, wherein the concrete structure is a tunnel.
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| KR102369069B1 (en) | 2021-08-11 | 2022-03-03 | 선진건설 주식회사 | Mortar composition comprising antibacterial and antiviral fiber stiffener and the method of repairing of concrete structure using thereof |
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