KR102251021B1 - Crack-reducing Polymer Mortar Composition for Repair Section - Google Patents
Crack-reducing Polymer Mortar Composition for Repair Section Download PDFInfo
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- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/16—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
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- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B24/24—Macromolecular compounds
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- C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5014—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing sulfur in the anion, e.g. sulfides
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
- C04B41/5015—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing phosphorus in the anion, e.g. phosphates
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
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- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
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- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
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- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
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- C04B7/34—Hydraulic lime cements; Roman cements ; natural cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
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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
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Abstract
Description
본 발명은 콘크리트 단면보수용 균열저감 성능의 폴리머 모르타르 조성물에 관한 것으로, 산업부산물의 적극적인 활용과 적절한 혼화제의 혼입으로 강도 촉진은 내염성, 수축 저항성과 보수성을 확보하여 균열저감 성능 발현이 가능해짐으로써 화학시설물, 하수처리장, 하수관거 및 해양구조물 등의 콘크리트 단면보수용으로 유리하게 적용할 수 있는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물에 관한 것이다.The present invention relates to a polymer mortar composition with crack reduction performance for concrete cross-section repair, and by actively utilizing industrial by-products and mixing appropriate admixtures, strength promotion secures flame resistance, shrinkage resistance and water holding properties, thereby enabling the expression of crack reduction performance. It relates to a crack-reducing polymer mortar composition for concrete cross-section repair that can be advantageously applied for concrete cross-section repair of facilities, sewage treatment plants, sewage pipes and offshore structures.
콘크리트 구조물은 콘크리트 자체의 알칼리성에 의해서 내부 매립 철근의 부식을 방지한다. 그런데 콘크리트의 알칼리성은 외부 환경에 의해 점차적으로 수분 유입 · 유출에 의한 용출, CO2가스 유입에 따른 CaCO3생성 등이 반복적으로 이루어지며, 이러한 반복은 콘크리트 미세공극을 증가시켜 콘크리트 외부 및 내부의 중성화에 원인이 된다. 콘크리트의 중성화는 철근부식을 초래하고, 또한 내부 압력 증가로 인한 구조물의 부분 균열과 박리는 물론 구조물의 붕괴까지 초래할 수 있다다. 한편 해안에 노출된 콘크리트 구조물에는 해수와 해풍에 포함된 염소이온이 콘크리트 내에 침투하면서 철근에 있는 부동태 피막을 파괴시키기 때문에 염해가 일어나기도 한다. Concrete structures prevent corrosion of reinforced reinforcing bars by the alkalinity of the concrete itself. However, the alkalinity of concrete is gradually eluted by inflow and outflow of moisture due to the external environment, and CaCO3 generation by the inflow of CO2 gas occurs repeatedly, and this repetition increases the micropore of concrete and causes neutralization of the exterior and interior of concrete. Becomes. Neutralization of concrete causes corrosion of reinforcing bars, and may cause partial cracking and delamination of the structure due to an increase in internal pressure, as well as collapse of the structure. On the other hand, salt damage occurs in concrete structures exposed to the shore because chlorine ions contained in seawater and sea breeze penetrate into the concrete and destroy the passive film on the reinforcing bar.
콘크리트 구조물에 균열, 박리, 염해 등의 손상이 일어나면 손상부위의 콘크리트를 제거한 후 제거된 콘크리트 단면을 복구하는 콘크리트 단면보수공사를 실시하며, 콘크리트 단면보수공사에는 단면보수 모르타르가 이용된다. 단면보수 모르타르는 높은 화학적 내구성, 원활한 시공성, 높은 부착강도와 압축강도, 낮은 수축 팽창률 등의 성능이 요구된다. When damage such as cracks, peeling, or salt damage occurs in the concrete structure, concrete section repair work is performed to restore the removed concrete section after removing the concrete in the damaged area. Section repair mortar is used for concrete section repair work. Sectional repair mortar requires high chemical durability, smooth workability, high adhesion and compressive strength, and low shrinkage and expansion rate.
일반적으로 콘크리트 단면보수 모르타르는 시멘트, 고로슬래그 미분말, 플라이애쉬, 메타카올린, 실리카흄 등의 결합재와 우레탄수지, 아크릴수지, 및 폴리에스테르 수지 등의 분말형 폴리머 수지, 유리분말 등의 충진재, 골재 외에 경화제, 유동화제, 증점제 등의 첨가제로 구성된다. 종래에는 통상 보수모르타르에서 보통 포틀랜드 시멘트를 다량 사용하였는데, 다만 염소이온 침투저항성이 부족하여 일부 고로슬래그 미분말 3종(분말도 3,500~4,500cm2/g)과 플라이애시, 실리카퓸을 혼입하여 화학저항성, 장기강도를 확보하고 있다.In general, concrete cross-section repair mortar is a binder such as cement, blast furnace slag powder, fly ash, metakaolin, silica fume, and powdery polymer resins such as urethane resin, acrylic resin, and polyester resin, fillers such as glass powder, aggregates, and hardeners. , Fluidizing agent, thickener, and other additives. Conventionally, a large amount of Portland cement was used in normal repair mortar, but due to lack of chlorine ion penetration resistance, 3 types of blast furnace slag fine powder (powder also 3,500~4,500cm2/g), fly ash, and silica fume were mixed to provide chemical resistance. It has long-term strength.
최근에는 시멘트의 중금속 용출 문제, 시멘트 소성공정에서의 이산화탄소 배출문제 등이 지적되면서 시멘트의 사용량을 줄이고자 하는 방안이 다양하게 연구되고 있으며, 콘크리트 단면보수 모르타르에도 시멘트 대체재로 고로슬래그의 활용 방안이 연구되는 실정이다. 그러한 연구 결과로 특허 제10-1942425호, 특허 제10-0908499호 등이 제안된바 있다. Recently, as the problem of the heavy metal elution of cement and the problem of carbon dioxide emission in the cement sintering process have been pointed out, various ways to reduce the use of cement are being studied, and the use of blast furnace slag as a cement substitute for concrete cross-section repair mortar is studied. It is the actual situation. As a result of such research, Patent No. 10-1942425 and Patent No. 10-0908499 have been proposed.
본 발명은 새로운 콘크리트 단면보수용 폴리머 모르타르 조성물을 제공하고자 개발된 것으로, 산업부산물의 적극적인 활용과 적절한 혼화제의 혼입으로 강도 촉진은 내염성, 수축 저항성과 보수성을 확보하여 균열저감 성능 발현이 가능해진 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물을 제공하는데 기술적 과제가 있다.The present invention was developed to provide a new polymer mortar composition for repairing concrete sections, and the strength promotion through the active use of industrial by-products and the incorporation of appropriate admixtures secures flame resistance, shrinkage resistance and water retention properties, enabling the expression of crack reduction performance. There is a technical problem in providing a repair crack-reducing polymer mortar composition.
또한 본 발명은 고로슬래그 기반으로 장기강도는 물론 우수한 초기강도와 우수한 부착성능을 나타내어 작업성을 향상시킬 수 있는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물을 제공하고자 한다.In addition, the present invention is to provide a crack-reducing polymer mortar composition for concrete section repair that can improve workability by showing long-term strength as well as excellent initial strength and excellent adhesion performance based on blast furnace slag.
나아가 본 발명은 산업부산물의 적극적인 활용으로 친환경성을 더욱 향상시킬 수 있는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물을 제공하고자 한다.Further, the present invention is to provide a crack-reducing polymer mortar composition for repairing concrete sections that can further improve eco-friendliness through active use of industrial by-products.
상기한 기술적 과제를 해결하기 위해 본 발명은, 고로슬래그 미분말, 무수석고, 소석회, 시멘트 킬른더스트(Cement Kiln Dust, 칼슘 락테이트(Calcium Lactate)를 포함하여 조성된 친환경 결합재; 폴리머 수지 분말; 분산제; 보강섬유; 골재;를 포함하여 조성되는 것을 특징으로 하는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물을 제공한다. 이러한 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물에는 수축저감제, 증점제가 더 포함되어 조성될 수 있으며, 이때 친환경 결합재는 분말도가 6,500~8,500cm2/g인 고로슬래그 미분말 73~88중량%; 분말도가 5,000~7,000cm2/g인 무수석고 10~18중량%; 폐소석회 1.5~3중량%; 시멘트 킬른더스트(Cement Kiln Dust) 0.4~3중량%; 칼슘 락테이트(Calcium Lactate) 0.1~3중량%;로 조성되며, 이러한 친환경 결합재 100중량부에 대하여 폴리머계 수지 분말 0.2~4.0중량부, 분산제 0.1~2.0중량부, 보강섬유 0.1~1.5중량부, 수축저감제 0.2~4.0중량부, 증점제 0.001~0.01중량부, 골재 150~250중량부로 바람직하게 조성될 수 있다.In order to solve the above technical problem, the present invention is an eco-friendly binder composed of fine blast furnace slag powder, anhydrous gypsum, slaked lime, cement kiln dust, calcium lactate; polymer resin powder; dispersant; It provides a crack-reducing polymer mortar composition for concrete cross-section repair, comprising a reinforcing fiber; aggregate; The crack-reducing polymer mortar composition for concrete cross-section repair may further include a shrinkage reducing agent and a thickening agent. In this case, the eco-friendly binder is 73-88% by weight of blast furnace slag fine powder with a powderiness of 6,500-8,500cm2/g; 10-18% by weight of anhydrous gypsum with a powderiness of 5,000-7,000cm2/g; 1.5-3% by weight of waste slaked lime ; Cement Kiln Dust (Cement Kiln Dust) 0.4-3% by weight; Calcium Lactate (Calcium Lactate) 0.1-3% by weight; It is composed of; 0.2-4.0 parts by weight of polymer resin powder based on 100 parts by weight of this eco-friendly binder, It may be preferably composed of 0.1 to 2.0 parts by weight of a dispersant, 0.1 to 1.5 parts by weight of reinforcing fibers, 0.2 to 4.0 parts by weight of a shrinkage reducing agent, 0.001 to 0.01 parts by weight of a thickener, and 150 to 250 parts by weight of an aggregate.
또한 본 발명은 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물을 바람직하게 이용한 콘크리트 단면보수공법으로, 콘크리트 구조물에서 손상부위를 정리하고, 폴리머 모르타르 조성물을 폴리머 모르타르 조성물 대비 15~25중량%의 혼합수로 배합하여 손상부위에 충진하는 것을 특징으로 하는 콘크리트 단면보수공법을 제공한다.In addition, the present invention is a concrete cross-section repair method that preferably uses a crack-reducing polymer mortar composition for concrete cross-section repair, and arranges damaged areas in a concrete structure, and mixes the polymer mortar composition with a mixed water of 15 to 25% by weight compared to the polymer mortar composition. It provides a concrete section repair method, characterized in that filling the damaged area.
본 발명에 따르면 다음과 같은 효과를 기대할 수 있다.According to the present invention, the following effects can be expected.
첫째, 콘크리트 단면보수용 모르타르에서 시멘트 사용을 배제하고 고로슬래그 등의 산업부산물을 적극 사용하기 때문에, 이산화탄소 배출을 줄이고 독성물질 또는 환경 오염 요인을 줄일 수 있다. 아울러 산업 부산물의 적극 활용으로 경제성을 확보할 수 있다.First, since the use of cement is excluded from the concrete section repair mortar and industrial by-products such as blast furnace slag are actively used, carbon dioxide emissions can be reduced and toxic substances or environmental pollution factors can be reduced. In addition, economic feasibility can be secured through active use of industrial by-products.
둘째, 본 발명의 콘크리트 단면보수용 모르타르는 시멘트를 배제한 고로슬래그 기반의 결합재를 사용하면서도 적절한 혼화제의 사용하기 때문에, 장기강도는 물론 우수한 초기강도와 우수한 부착성능을 발현하여 작업성을 확보하고, 더불어 내염성, 수축 저항성과 보수성에서 우수한 효과를 발휘하여 균열저감 성능까지 확보할 수 있다. 이로써 콘크리트 단면보수공법에 유리하게 적용할 수 있다.Second, since the mortar for repairing concrete sections of the present invention uses a blast furnace slag-based binder excluding cement and uses an appropriate admixture, it has long-term strength as well as excellent initial strength and excellent adhesion performance to secure workability. It exhibits excellent effects in flame resistance, shrinkage resistance and water retention, and can secure even crack reduction performance. This can be advantageously applied to the concrete section repair method.
본 발명은 콘크리트 단면보수용 균열저감 성능의 폴리머 모르타르 조성물에 관한 것으로, 결합재로 고로슬래그 기반의 친환경 결합재를 사용하면서 폴리머, 분산제, 보강섬유 등의 적절한 혼화제를 함께 사용한다는데 특징이 있다. 구체적으로 본 발명에 따른 폴리머 모르타르 조성물은, 고로슬래그 미분말, 무수석고, 소석회, 시멘트 킬른더스트(Cement Kiln Dust, 칼슘 락테이트(Calcium Lactate)를 포함하여 조성된 친환경 결합재, 혼화제로 폴리머 수지 분말, 분산제 및 보강섬유, 그리고 골재를 포함하여 조성된다. 여기에 혼화제로 수축저감제, 증점제가 더 포함되어 조성될 수 있다. The present invention relates to a polymer mortar composition having a crack-reducing performance for repairing concrete sections, and is characterized in that an eco-friendly binder based on blast furnace slag is used as a binder, and an appropriate admixture such as a polymer, a dispersant, and a reinforcing fiber is used together. Specifically, the polymer mortar composition according to the present invention is an eco-friendly binder composed of fine powder of blast furnace slag, anhydrous gypsum, slaked lime, cement kiln dust, calcium lactate, and polymer resin powder as an admixture. And a reinforcing fiber, and an aggregate, which may further include a shrinkage reducing agent and a thickener as an admixture.
친환경 결합재는 시멘트가 배제된 고로슬래그 기반의 결합재로, 고로슬래그 미분말, 무수석고, 소석회, 시멘트 킬른더스트(Cement Kiln Dust, 칼슘 락테이트(Calcium Lactate)를 포함하여 조성된다. 여기서 소석회는 고로슬래그 및 폐기물 소각시설의 습식 스크러버 백필터 시스템에서 집진된 폐소석회를 바람직하게 사용할 수 있는데, 폐소석회의 사용으로 친환경성, 경제성을 더욱 향상시킬 수 있다. 본 발명에서 친환경 결합재는, 분말도가 6,500~8,500cm2/g인 고로슬래그 미분말 70~88중량%; 분말도가 5,000~7,000cm2/g인 무수석고 10~18중량%; 폐소석회 1.5~3중량%; 시멘트 킬른더스트(Cement Kiln Dust) 0.4~3중량%; 칼슘 락테이트(Calcium Lactate) 0.1~3중량%;로 조성하는 것이 바람직하다. The eco-friendly binder is a binder based on blast furnace slag without cement, and is composed of blast furnace slag fine powder, anhydrous gypsum, slaked lime, cement kiln dust, and calcium lactate, where slaked lime is blast furnace slag and blast furnace slag. The waste slaked lime collected in the wet scrubber bag filter system of the waste incineration facility can be preferably used, but the use of slaked lime can further improve eco-friendliness and economy. 70-88% by weight of blast furnace slag fine powder of cm2/g; 10-18% by weight of anhydrous gypsum having a powderiness of 5,000-7,000 cm2/g; 1.5-3% by weight of waste slaked lime; 0.4-3% by weight of cement kiln dust It is preferable to use a composition of 0.1 to 3% by weight; calcium lactate (Calcium Lactate).
친환경 결합재에서 고로슬래그 미분말은 시멘트를 대체하는 주요한 재료이고, 무수석고는 고로슬래그의 잠재수경성을 촉진시키는 자극제가 된다. 고로슬래그 및 무수석고에 의해 수화반응으로 에트링자이트, C-S-H 수화물 등이 생성되어 강도를 발현하게 된다. 이때 칼슘 락테이트(Calcium Lactate, C3H6O3·1/2Ca)는 물과 반응하여 Ca2+를 생성하고 pH를 높임으로써, 강도 발현에 도움이 되는 C-S-H 수화물의 생성에 긍정적인 영향을 준다. 고로슬래그 미분말은 분말도 6,500~8,500cm2/g의 고미분말을 사용하는데, 이러한 분말도는 경제성을 확보하면서 초기에 적절한 반응이 가능하다. 높은 분말도로 고로슬래그 내부의 SiO2 성분이 빠르게 수화반응하여 C-S-H(Calcium silicate hydrate) 수화물을 생성하고 강도를 증진시킬 수 있는 것이다. 고로슬래그 미분말은 70~88중량% 사용하며, 70중량% 미만이면 시멘트 대체 효과 및 강도 증진 효과가 미미하고, 78중량% 초과하면 작업성이 떨어진다. 무수석고도 고로슬래그 미분말과 마찬가지로 경제성 확보와 초기 적절한 반응을 위해 분말도 5,000~7,000cm2/g의 고미분말을 사용한다. 이러한 무수석고는 10~18중량% 사용하는데, 10중량% 미만이면 자극 효과 부족으로 초기 강도 발현이 부진하고, 18중량% 초과하면 경제성이 상실한다. 칼슘 락테이트(Calcium Lactate)는 0.1~3중량% 사용하며, 이러한 범위는 초기 강도 증진 효과와 함께 작업성을 확보하기 위한 범위가 된다.In eco-friendly binders, fine powder of blast furnace slag is a major material replacing cement, and anhydrous gypsum is a stimulant that promotes the latent hydraulicity of blast furnace slag. By hydration reaction by blast furnace slag and anhydrous gypsum, ethringite, CSH hydrate, and the like are produced to develop strength. At this time, calcium lactate (C3H6O3·1/2Ca) reacts with water to produce Ca 2+ and raises the pH, thereby positively affecting the formation of CSH hydrate, which is helpful for strength development. The fine blast furnace slag powder uses a high-fine powder of 6,500 to 8,500 cm2/g, and such a fine powder enables an appropriate reaction in the initial stage while securing economical efficiency. With a high degree of powder, the SiO 2 component inside the blast furnace slag rapidly hydrates to generate CSH (Calcium silicate hydrate) hydrate and improves the strength. The fine blast furnace slag powder is used in an amount of 70 to 88% by weight, and when it is less than 70% by weight, the effect of replacing cement and enhancing strength is insignificant, and when it exceeds 78% by weight, workability is deteriorated. Like the fine powder of blast furnace slag, anhydrous gypsum powder uses 5,000~7,000cm2/g of fine powder for securing economic efficiency and initial appropriate reaction. Such anhydrous gypsum is used in an amount of 10 to 18% by weight, and if it is less than 10% by weight, initial strength expression is sluggish due to lack of stimulating effect, and if it exceeds 18% by weight, economical efficiency is lost. Calcium Lactate is used in an amount of 0.1 to 3% by weight, and this range becomes a range for securing workability with an initial strength enhancing effect.
친환경 결합재에서 소석회는 자극제로서 고로슬래그의 수화반응을 촉진하여 초기에 에트링자이트, C-S-H 수화물의 양을 증가시켜 강도를 촉진시킨다(C5S3A + CH + 3CS + 34H → C6AS3H32 + 3CSH). 소석회는 습식 스크러버 백필터 시스템에서 집진된 폐소석회를 바람직하게 사용하는데, 이러한 폐소석회는 초기 강도 증진 효과와 작업성 확보를 위해 1.5~3중량% 사용하는 것이 바람직하다. 시멘트 킬른더스트(Cement Kiln Dust)는 시멘트 킬른더스트(Cement Kiln Dust 이하 CKD)는 시멘트 제조공정에서 발생되는 배출가스에 포함된 비산분진을 집진한 것으로, 탄산칼슘 및 알칼리가 포함되어 있기 때문에 초기 수화 반응 촉진으로 응결 촉진과 초기강도 증진에 기여한다. 시멘트 킬른더스트(Cement Kiln Dust)는 0.4~3중량% 사용하는 것이 바람직한데, 이는 초기 강도 증진 효과와 함께 작업성을 확보하기 위함이다.In eco-friendly binders, slaked lime promotes the hydration reaction of blast furnace slag as a stimulant, and increases the amount of ethringite and C-S-H hydrate in the initial stage, thereby promoting strength (C5S3A + CH + 3CS + 34H → C6AS3H32 + 3CSH). The slaked lime preferably uses the waste slaked lime collected in the wet scrubber bag filter system, and the slaked lime is preferably used in an amount of 1.5 to 3% by weight in order to increase the initial strength and ensure workability. Cement Kiln Dust (Cement Kiln Dust or CKD) is a collection of fugitive dust contained in the exhaust gas generated from the cement manufacturing process.Since it contains calcium carbonate and alkali, the initial hydration reaction Acceleration contributes to promoting condensation and increasing initial strength. It is preferable to use 0.4 to 3% by weight of cement kiln dust, which is to secure workability as well as initial strength enhancement effect.
본 발명의 균열저감 모르타르 조성물은 혼화제로 폴리머 수지 분말, 분산제, 보강섬유를 사용한다. 폴리머 수지 분말은 작업성, 보수성, 부착강도 향상에 기여하며, 친환경 결합재가 고미분말의 재료 사용으로 반죽시 점성이 증가하므로 폴리머 수지 분말은 종래보다 적은 혼입율로 친환경 결합재 100중량부에 대하여 0.2~4.0중량부 사용하는 것이 바람직하다. 0.2중량부 미만이면 혼입 효과가 미미하고, 4.0중량부 초과하면 경제성이 상실한다. 분산제는 재료들의 균질한 분산을 통한 적절한 작업성 확보, 혼합수량의 감소를 통한 강도 증진 기여를 위한 재료가 되며, 나프탈렌계 분산제를 적절히 사용할 수 있다. 분산제는 결합재 100중량부에 대하여 0.1~2.0중량부 사용하는데, 0.1중량부 미만이면 혼입 효과가 미미하고, 2.0중량부 초과하면 경제성 상실과 함께 작업성 및 강도 저하가 우려된다. 보강섬유는 경화 수축균열 감소, 휨 인장강도 증진에 기여하며, 바람직하게는 6mm 정도의 길이의 PP섬유를 사용한다. 보강섬유는 결합재 100중량부에 대하여, 0.1~1.5중량부 사용하며, 0.1중량부 미만이면 강도 증진 효과가 미미하고 1.5중량부 초과하면 경제성 상실은 물론 작업성 및 강도 저하가 초래된다.The crack reducing mortar composition of the present invention uses a polymer resin powder, a dispersant, and a reinforcing fiber as an admixture. Polymer resin powder contributes to the improvement of workability, water retention, and adhesion strength, and since the viscosity of the eco-friendly binder increases when kneaded by the use of a high-fine powder material, the polymer resin powder is 0.2 to 4.0 parts by weight per 100 parts by weight of the eco-friendly binder with less mixing ratio than before. It is preferable to use parts by weight. If it is less than 0.2 parts by weight, the mixing effect is insignificant, and if it exceeds 4.0 parts by weight, economic feasibility is lost. The dispersant is a material for securing proper workability through homogeneous dispersion of materials, and contributing to strength enhancement through a reduction in the amount of mixed material, and a naphthalene-based dispersant can be appropriately used. The dispersant is used in an amount of 0.1 to 2.0 parts by weight with respect to 100 parts by weight of the binder. If it is less than 0.1 parts by weight, the mixing effect is insignificant, and if it exceeds 2.0 parts by weight, there is a concern about loss of economy and workability and strength reduction. The reinforcing fiber contributes to curing shrinkage cracking reduction and enhancement of flexural and tensile strength, and preferably, a PP fiber having a length of about 6 mm is used. Reinforcing fibers are used in 0.1 to 1.5 parts by weight based on 100 parts by weight of the binder, and if less than 0.1 parts by weight, the strength enhancing effect is insignificant, and if it exceeds 1.5 parts by weight, economicality is lost, as well as workability and strength decrease.
위와 같은 혼화제 외에도 수축저감제, 증점제를 더 사용할 수 있다. 수축저감제는 모세관 응축수를 용해하여 표면장력을 완화시킴으로써 모르타르의 수축저감에 기여하며, 바람직하게는 펜틸글리콜(Pentyl Glycol)과 같은 Flake 형태의 유기계 수축저감제를 사용한다. 수축저감제는 결합재 100중량부에 대하여 0.3~2.0중량부 사용하는 것이 바람직한데, 0.3중량부 미만이면 수축저감 효과가 미미하고, 2.0중량부 초과하면 초기강도, 장기강도 부진이 우려된다. 증점제는 점성 증가로 부착성능 향상에 기여하며, 분말 타입의 멜라민계 증점제를 바람직하게 사용한다. 증점제는 결합재 100중량부에 대하여, 점성 효과와 함께 경제성, 작업성, 강도 발현 등을 고려하여 0.001~0.01중량부 사용하면 적당하다.In addition to the above admixtures, shrinkage reducing agents and thickening agents can be used. The shrinkage reducing agent contributes to reducing the shrinkage of the mortar by dissolving the capillary condensate water to relieve the surface tension, and preferably, an organic shrinkage reducing agent in the form of a flake such as pentyl glycol is used. It is preferable to use 0.3 to 2.0 parts by weight of the shrinkage reducing agent based on 100 parts by weight of the binder. If it is less than 0.3 parts by weight, the effect of reducing the shrinkage is insignificant, and if it exceeds 2.0 parts by weight, there is a concern about sluggish initial strength and long-term strength. The thickener contributes to the improvement of adhesion performance by increasing the viscosity, and a powder-type melamine-based thickener is preferably used. It is appropriate to use 0.001 to 0.01 parts by weight of the thickener based on 100 parts by weight of the binder in consideration of the viscous effect, economy, workability, and strength expression.
단면보수 모수타르에서 골재는 충전재로서 경제성 및 작업성 확보, 강도 발현에 기여한다. 골재는 흡수율 2% 이하의 규사를 사용하는 것이 바람직한데, 흡수율이 높을 경우 혼합수가 다량 필요하여 강도 저하를 초래한다. 더불어 4호사(1.2~0.85mm) 5~20중량%, 5호사(0.85~0.6mm) 20~40중량%, 6호사(0.6~0.25mm) 50~70중량% 수준으로 혼입하여 사용하는 것이 바람직하다. 다만 시공 현장의 상황과 여러 요인들로 인해 잔골재의 조립율에 따른 모르타르의 점성, 강도, 부착력, 작업성이 변동될 수 있으므로, 현장의 온도와 상황에 맞게 적절히 조정하면서 사용한다. 골재는 결합재 100중량부에 대하여 120~200중량부 사용하며, 120중량부 미만이면 상대적으로 결합재 사용량이 증가하여 경제성이 떨어지고 200중량부 미만이면 초기강도 저하가 우려된다.In cross section repair parameter tar, aggregate contributes to securing economical efficiency and workability as a filler, and enhancing strength. It is preferable to use silica sand having an absorption rate of 2% or less as the aggregate, but when the absorption rate is high, a large amount of mixed water is required, resulting in a decrease in strength. In addition, it is desirable to mix and use 5 to 20% by weight of No. 4 (1.2 to 0.85mm), 20 to 40% by weight of No. 5 (0.85 to 0.6mm), and 50 to 70% by weight of No. 6 (0.6 to 0.25mm). Do. However, the viscosity, strength, adhesion, and workability of the mortar may vary depending on the assembly rate of the fine aggregate due to the conditions of the construction site and various factors, so use it while appropriately adjusting it according to the temperature and situation of the site. Aggregate is used in an amount of 120 to 200 parts by weight based on 100 parts by weight of the binder, and if it is less than 120 parts by weight, the amount of the binder is relatively increased, resulting in poor economic efficiency, and if it is less than 200 parts by weight, there is a concern that initial strength decreases.
위와 같이 친환경 결합재, 혼화제, 골재로 조성된 콘크리트 단면보수 모르라트는 건조 모르타르가 되며, 이러한 건조 모르타르를 건조 모르타르 대비 15~25중량%의 혼합수로 배합하면 현장에서 작업 가능한 습식 모르타르가 된다. 콘크리트 단면보수공법은 콘크리트 구조물에서 손상부위를 정리하고, 손상부위에 습식 모르타르를 충진하는 방법으로 실시하게 된다. 손상부위의 정리는 손상된 콘크리트를 제거하고 콘크리트 성능회복제 및 프라이머를 도포하는 방법으로 수행할 수 있으며, 콘크리트 성능회복제와 프라이머 도포는 콘크리트 모체의 성능 회복 및 흡수 제어형 모르타르의 부착력 향상에 기여한다. 더불어 습식 모르타르를 충진한 후에는 보호 코팅제를 도포하는 것이 보수된 콘크리트 단면 보호를 위해 바람직하한다.Concrete cross-section repair mortar composed of eco-friendly binders, admixtures, and aggregates as above becomes a dry mortar, and if this dry mortar is blended with a mixed water of 15 to 25% by weight compared to the dry mortar, it becomes a wet mortar that can be worked on the site. The concrete section repair method is carried out by arranging the damaged area in the concrete structure and filling the damaged area with wet mortar. The damaged area can be cleaned up by removing the damaged concrete and applying a concrete performance recovery agent and a primer, and the application of a concrete performance recovery agent and a primer contributes to the recovery of the performance of the concrete matrix and the improvement of the adhesion of the absorption-controlled mortar. In addition, after filling the wet mortar, it is preferable to apply a protective coating to protect the repaired concrete section.
이하에서는 시험예에 의거하여 본 발명을 상세히 살펴본다. 다만, 아래의 시험예는 본 발명을 예시하기 위한 것일 뿐이며, 본 발명의 범위가 이로써 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail based on test examples. However, the following test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.
[제조예] 결합재[Production Example] Binder
아래 [표 1]과 같은 조성으로 결합재를 준비하였다. 비교예1은 일반적으로 보수현장에서 사용하는 OPC 기반의 결합재이고, 비교예2와 실시예1,2는 본 발명에서 제안하는 친환경 결합재이다. A binder was prepared in the composition as shown in [Table 1] below. Comparative Example 1 is an OPC-based binder generally used at a repair site, and Comparative Example 2 and Examples 1 and 2 are eco-friendly binders proposed in the present invention.
- 실리카흄: 분말도 30,000~35,000cm2/g, 비중 2.18
- 고로슬래그 고미분말: 분말도 6,500~8,500cm2/g
- 무수석고: 분말도 5,000~7,000cm2/g
- 폐소석회: 습식스크러버 백필터 시스템에서 집진
- 시멘트 킬른더스트: 분말도 7,000~8,000cm2/g
- 칼슘 락테이트: 밀도 1.49g/cm3-CSA: Powder degree 4,600cm2/g, specific gravity: 2.87, Al2O3 content 36%
-Silica fume: 30,000~35,000cm2/g of powder, specific gravity 2.18
-Blast furnace slag fine powder: powder 6,500~8,500cm2/g
-Anhydrous Gypsum: Powder degree 5,000~7,000cm2/g
-Waste slaked lime: dust collected by wet scrubber bag filter system
-Cement kiln dust: 7,000~8,000cm2/g powder
-Calcium lactate: density 1.49g/cm3
[시험예] 단면보수 모르타르의 특성[Test Example] Characteristics of cross-section repair mortar
1. 단면보수 모르타르의 배합1. Mixing of cross-section repair mortar
아래 [표 2]와 같은 조성으로 건조 모르타르를 조성하고, 건조 모르타르 대비 19.5중량%로 혼합수를 혼합하여 습식 모르타르로 배합하였다. 건조 모르타르 조성에서 골재는 규사 4호 7중량%, 규사 5호 35중량%, 규사 6호 57중량%로 혼합하여 사용하였다. A dry mortar was prepared with the composition shown in [Table 2] below, and mixed water at 19.5% by weight compared to the dry mortar was mixed into a wet mortar. In the dry mortar composition, the aggregate was used by mixing 7% by weight of silica sand No. 4, 35% by weight of silica sand No. 5, and 57% by weight of silica sand No. 6.
- 분산제 : 나프탈렌계 분말형 분산제
- 증점제 : 멜라민계 분말형 증점제-Shrinkage reducing agent: Flake-type Pentyl Glycol
-Dispersant: Naphthalene powder type dispersant
-Thickener: Melamine powder type thickener
2. 단면보수 모르타르의 특성2. Characteristics of cross-section repair mortar
[표 2]와 같이 조성하여 혼합수로 배합한 습식 모르타르에 대하여, 압축강도, 휨강도, 부착강도, 플로우, 단위용적질량, 길이변화, 보수성, 염소이온침투저항성 등 특성을 평가하였다. 압축강도와 휨강도는 KS L ISO 679[시멘트의 강도 시험 방법]에 따라 시험하여 재령 3일, 7일, 28일에 측정하고, 부착강도는 KS F 4042[콘크리트 구조물 보수용 폴리머 모르타르 시험방법]에 따라 시험하여 재령 3일, 7일, 28일에 측정하였다. 플로우와 단위용적질량은 KS F 2476[폴리머 시멘트 모르타르의 시험방법]에 따라 시험하고, 길이변화는 Data Rogger(TDS-530)법을 사용하여 시험하고, 염소이온침투저항성은 KS F 4042[콘크리트 구조물 보수용 폴리머 시멘트 모르타르 시험방법]에 따라 시험하고, 보수성은 KS L 5219[메이슨리 시멘트 시험방법]에 따라 시험하였다. 시험 결과는 아래 [표 3]과 같다.Properties such as compressive strength, flexural strength, adhesion strength, flow, unit volume mass, length change, water retention, and chloride ion penetration resistance were evaluated for the wet mortar formulated as shown in [Table 2] and blended with mixed water. Compressive strength and flexural strength were tested in accordance with KS L ISO 679 [Cement strength test method] and measured at 3, 7 and 28 days of age, and the adhesion strength was determined by KS F 4042 [Polymer mortar test method for repairing concrete structures]. It was tested and measured on the 3rd, 7th, and 28th day of age. Flow and unit volumetric mass are tested according to KS F 2476 [Test Method of Polymer Cement Mortar], length change is tested using Data Rogger (TDS-530) method, and chloride ion penetration resistance is KS F 4042 [concrete structure It was tested according to the polymer cement mortar test method for repair], and the water retention property was tested according to KS L 5219 [Masonry Cement Test Method]. The test results are shown in [Table 3] below.
(MPa)Compressive strength
(MPa)
(MPa)Flexural strength
(MPa)
(Coulombs)Chlorine ion penetration resistance
(Coulombs)
위의 [표 3]에서와 같이 고로슬래그 기반의 결합재를 사용한 실시예1~3은 종래 OPC 기반의 결합재를 사용한 비교예1보다 장기강도, 보수성, 길이변화, 염소이온 침투저항성에서 개선된 것으로 확인되며, 다만 초기강도는 다소 낮은 것으로 확인된다. 실시예2는 실시예1에서 혼화제 중 수축저감제의 사용량을 줄인 예가 되는데, 실시예1과 비교할 때 초기강도, 보수성, 길이변화, 염소이온 침투저항성이 더욱 개선된 것으로 확인된다. 실시예3은 실시예2에서 부족한 성능을 향상시키면서 과한 성능을 다소 떨어뜨리고 아울러 생산성과 경제성을 확보하기 위해 첨가제 부분에서 수축저감제와 증점제를 삭제하고 폴리머 수지를 상당부분 하향 조정한 예가 되는데, 시험결과 실시예2보다 초기 압축강도는 향상되었고 장기강도는 비교예1보다도 우수한 결과를 나타냈다. As shown in [Table 3] above, Examples 1 to 3 using a blast furnace slag-based binder were confirmed to be improved in long-term strength, water retention, length change, and chloride ion penetration resistance than Comparative Example 1 using a conventional OPC-based binder. However, it is confirmed that the initial strength is somewhat low. Example 2 is an example in which the amount of the shrinkage reducing agent among the admixtures in Example 1 is reduced. Compared with Example 1, the initial strength, water retention, length change, and chloride ion penetration resistance are further improved. Example 3 is an example in which the shrinkage reducing agent and the thickener were removed from the additive part and the polymer resin was significantly lowered in order to slightly lower the excessive performance while improving the insufficient performance in Example 2 and secure productivity and economy. Results The initial compressive strength was improved than that of Example 2, and the long-term strength was superior to that of Comparative Example 1.
Claims (6)
상기 친환경 결합재는, 분말도가 6,500~8,500cm2/g인 고로슬래그 미분말 70~88중량%; 분말도가 5,000~7,000cm2/g인 무수석고 10~18중량%; 폐소석회 1.5~3중량%; 시멘트 킬른더스트(Cement Kiln Dust) 0.4~3중량%; 칼슘 락테이트(Calcium Lactate) 0.1~3중량%;로 조성된 것이며,
상기 친환경 결합재 100중량부에 대하여, 폴리머 수지 분말 0.2~4.0중량부, 분산제 0.1~2.0중량부, 보강섬유 0.1~1.5중량부, 골재 150~250중량부를 포함하여 조성되는 것을 특징으로 하는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물.An eco-friendly binder composed of blast furnace slag powder, anhydrous gypsum, slaked lime, cement kiln dust, calcium lactate; polymer resin powder; dispersant; reinforcing fiber; aggregate;
The eco-friendly binder is 70 to 88% by weight of fine blast furnace slag powder having a powder degree of 6,500 to 8,500 cm2/g; 10-18% by weight of anhydrous gypsum having a powderiness of 5,000-7,000 cm2/g; 1.5-3% by weight of waste slaked lime; Cement Kiln Dust 0.4-3% by weight; It is composed of 0.1 to 3% by weight of calcium lactate,
Concrete cross-section repair, characterized in that the composition comprises 0.2 to 4.0 parts by weight of polymer resin powder, 0.1 to 2.0 parts by weight of dispersant, 0.1 to 1.5 parts by weight of reinforcing fiber, and 150 to 250 parts by weight of aggregate based on 100 parts by weight of the eco-friendly binder A crack-reducing polymer mortar composition for use.
수축저감제, 증점제를 더 포함하여 조성되는 것을 특징으로 하는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물.In paragraph 2,
A crack-reducing polymer mortar composition for repairing concrete sections, characterized in that the composition further comprises a shrinkage reducing agent and a thickening agent.
상기 골재는, 4호사(1.2~0.85mm) 5~20중량%, 5호사(0.85~0.6mm) 20~40중량%, 6호사(0.6~0.25mm) 50~70중량%로 혼합된 것임을 특징으로 하는 콘크리트 단면보수용 균열저감 폴리머 모르타르 조성물.In any one of claims 2 or 3,
The aggregate is characterized in that it is mixed with 5 to 20% by weight of No. 4 (1.2 to 0.85mm), 20 to 40% by weight of No. 5 (0.85 to 0.6mm), and 50 to 70% by weight of No. 6 (0.6 to 0.25mm) A crack-reducing polymer mortar composition for repairing concrete sections.
콘크리트 구조물에서 손상부위를 정리하고, 폴리머 모르타르 조성물을 폴리머 모르타르 조성물 대비 15~25중량%의 혼합수로 배합하여 손상부위에 충진하는 것을 특징으로 하는 콘크리트 단면보수공법.A concrete cross-section repair method using the crack-reducing polymer mortar composition for concrete cross-section repair according to claim 2 or 3,
Concrete cross-section repair method, characterized in that the damaged part is arranged in a concrete structure, and the polymer mortar composition is mixed with a mixed water of 15 to 25% by weight compared to the polymer mortar composition and filled in the damaged part.
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