KR101084040B1 - A mortar composition for repairing the surface of concrete structures and construction method using the same - Google Patents
A mortar composition for repairing the surface of concrete structures and construction method using the same Download PDFInfo
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- KR101084040B1 KR101084040B1 KR20110026066A KR20110026066A KR101084040B1 KR 101084040 B1 KR101084040 B1 KR 101084040B1 KR 20110026066 A KR20110026066 A KR 20110026066A KR 20110026066 A KR20110026066 A KR 20110026066A KR 101084040 B1 KR101084040 B1 KR 101084040B1
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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
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/0093—Aluminates
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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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
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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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 콘크리트 구조물의 단면복구를 위한 보수 보강용 모르타르 조성물 및 이를 이용한 시공 방법에 관한 것으로, 보다 상세하게는 중성화 억제 효과 및 염화물 차폐 효과를 갖는 콘크리트 구조물의 단면 보수 보강용 모르타르 조성물 및 이를 이용한 시공방법에 관한 것이다.
The present invention relates to a mortar composition for repair reinforcement for the cross-sectional recovery of concrete structures and a construction method using the same, and more specifically, to a cross-sectional repair reinforcement mortar composition for concrete structures having a neutralizing inhibitory effect and chloride shielding effect and construction using the same It is about a method.
철근 콘크리트 구조물은 건설 후 염해나 중성화, 알칼리 골재 반응, 화학적 부식 외에 물의 침투에 의한 강재의 부식 팽창 등으로 구조물이 열화되면서 장기적으로 내구성 및 사용성 저하를 초래한다. 이러한 구조물의 열화는 계속 진행하면 결국 구조물의 붕괴를 초래할 위험성이 있기 때문에 지속적으로 관리하고 보수할 필요가 있다.Reinforced concrete structures cause deterioration of durability and usability in the long term due to deterioration of the structure due to salt expansion, neutralization, alkali aggregate reaction, and chemical corrosion, as well as corrosion expansion of steel due to water penetration. The deterioration of such a structure needs to be continuously managed and repaired because there is a risk that the structure will eventually collapse.
구조물 표면의 박리 또는 초기 결함이 있거나 균열의 발생은 열화요인의 이동을 용이하게 하여 열화의 진행을 촉진시키므로 철근 콘크리트 구조물의 안정성 및 성능의 확보를 위해서는 열화 초기에 보수를 실시하여 더 이상의 열화의 진행을 억제하고 내구성능을 회복하고 향상시킬 필요가 있다. Since there is peeling or initial defects on the surface of the structure or the occurrence of cracks facilitates the movement of deterioration factors and promotes the progress of deterioration. It is necessary to restrain and improve the durability performance.
따라서, 콘크리트의 열화, 강재의 부식, 기타의 원인에 의해 구조물 단면의 박리나 탈락 등의 열화인자를 포함하는 콘크리트 부분을 제거한 후 단면을 그 원래의 성능 및 형태로 복원하기 위해 단면복구재료를 충진하거나 뿜칠 시공을 하여 보수를 실시한다. Therefore, after removing the concrete part including the deterioration factor such as peeling or dropping of the cross section of the structure due to deterioration of concrete, corrosion of steel, or other causes, the cross-section restoration material is filled to restore the cross section to its original performance and shape. Repair should be done by installing or spraying.
종래의 단면복구를 위한 단면 보수재로서 시멘트계 모르타르나, 폴리머 시멘트 모르타르를 사용하고 있다. 이러한 종래의 단면 보구재는 보수재로서의 역할인 기존 구조물의 열화를 억제하고 현재 이상의 내구성능을 향상시키는 것으로 강도를 높이거나 최초 시공 시 부착성능에만 초점을 맞춘 것이 대부분이기 때문에 시공 후 얼마 되지 않아 다시 보수공사를 해야 하는 문제점이 있었다.
Cement-based mortar and polymer cement mortar are used as the cross-sectional repairing material for conventional cross-sectional recovery. The conventional cross-section reinforcement is to repair the construction after a short time after the construction because most of them focus on only the adhesiveness at the time of initial construction or to increase the strength by suppressing the deterioration of the existing structure, which is a role as a repairing material and improving the durability beyond the present. There was a problem to do.
본 발명은 상술한 기술적인 문제점을 해결하기 위하여 도출된 것으로서, 보수 재료에 인텔리전트 기능을 부여할 수 있는 합성 슬래그 미분말을 도입하여 시공 후 서서히 자기방위 기능을 발휘하여 중성화 억제 뿐만 아니라 염화물 이온의 차폐에 효과가 커 내구성이 더욱 증진되는 단면복구 및 보수보강용 모르타르 조성물 및 이를 이용하여 시공하는 방법을 제공하고자 한다.
The present invention was derived to solve the above technical problems, by introducing a synthetic slag fine powder that can impart an intelligent function to the repair material, and gradually exhibits a self-defense function after construction to suppress neutralization as well as to shield chloride ions. It is intended to provide a cross-sectional recovery and repair reinforcement mortar composition and a method of construction using the same to increase the durability even more effective.
상술한 과제의 해결 수단으로서 본 발명은, 시멘트, 합성 슬래그 미분말, 수축 저감재, 고분자 수지 및 섬유를 포함하는 결합재를 이용하여 배합하는 것을 특징으로 하는 철근 콘크리트 단면 복구용 보수 보강용 모르타르 조성물을 제공한다.As a means of solving the above problems, the present invention provides a mortar composition for repair reinforcement for reinforced concrete cross section recovery, characterized in that it is blended using a cement, a synthetic slag fine powder, a shrinkage reducing material, a polymer resin and a binder containing fibers. do.
또한, 본 발명은 합성 슬래그 미분말 및 수축 저감제를 제조하고 이를 시멘트와 고분자 수지, 섬유 및 규사와 혼합하여 건조 모르타르 프리믹스 조성물을 제조한 후, 이를 물과 혼합하여 얻어진 모르타르 조성물을 이용하여 콘크리트 구조물의 단면을 보수 보강하는 시공방법을 제공한다.
In addition, the present invention is a synthetic slag fine powder and shrinkage reducing agent is prepared and mixed with cement and polymer resins, fibers and silica sand to prepare a dry mortar premix composition, and then mixed with water to obtain a concrete mortar composition of the concrete structure Provide a construction method to repair and reinforce the cross section.
본 발명에 따른 철근 콘크리트 단면 복구용 모르타르 조성물은 고로 급냉 슬래그와 고로 서냉 슬래그의 최적 비율로 이루어진 합성 슬래그 미분말을 포함함으로써 조성물 표면을 치밀하게 하여 염화물 이온의 침투를 막고 중성화를 억제하여 내구성을 더욱 증진시킬 수 있으며, 또한, 칼슘 설포 알루미네이트와 석고가 최적 비율로 혼합된 수축 저감제를 사용함으로써 조성물의 수축 팽창율을 낮추고 빠른 시간안에 강도를 발현할 수 있다. The mortar composition for reinforcing concrete cross section repair according to the present invention includes a synthetic slag fine powder composed of blast furnace quenching slag and blast furnace slow cooling slag, thereby densifying the surface of the composition to prevent the penetration of chloride ions and inhibiting neutralization to further enhance durability. In addition, by using a shrinkage reducing agent in which calcium sulfo aluminate and gypsum are mixed in an optimum ratio, the shrinkage expansion ratio of the composition can be lowered and strength can be expressed quickly.
또한, 본 발명에 따른 모르타르 조성물을 이용하면 건축, 토목 콘크리트 구조물의 수직, 수평면의 보수 보강이나 도로 교량, 터널, 발전소, 댐 등의 콘크리트 구조물의 보수와 각종 콘크리트 구조물의 손상, 파손 부위 보수 보강 및 정수장, 폐수장, 하수관로 지하구조물 보수에 매우 경제적이며 안정성을 갖는 장점이 있다.
In addition, the use of the mortar composition according to the present invention, the reinforcement of the construction, vertical and horizontal planes of civil engineering concrete structures, repair of concrete structures such as road bridges, tunnels, power plants, dams, and damage of various concrete structures, repair and repair of damaged sites, and Water purification plant, wastewater plant, sewage pipe underground structure has the advantage of very economical and stable.
이하에서는 본 발명을 더욱 구체적으로 설명하기로 한다.Hereinafter, the present invention will be described in more detail.
본 발명에 따른 단면복구 및 보수 보강용 모르타르 조성물은 시멘트, 합성 슬래그 미분말, 수축 저감재, 고분자 수지, 섬유를 포함하는 결합재를 제공한다. 보다 상세하게는 시멘트 40 ~ 85 중량%, 고로 급냉 슬래그 및 고로 서냉 슬래그가 7~9:1~3의 비율로 혼합된 것으로서 평균 입경이 2~10 μm인 합성 슬래그 미분말 5 ~ 45중량%, 수축 저감재 5% ~ 20중량%, 고분자 수지 0.5 ~ 1.5 중량% 및 섬유 0.2 ~ 2중량%를 포함하는 단면 복구 모르타르용 결합재 조성물을 제공한다. The mortar composition for cross-sectional recovery and repair reinforcement according to the present invention provides a binder including cement, fine synthetic slag powder, shrinkage reducing material, polymer resin, and fiber. More specifically, 40 to 85% by weight of cement, blast furnace quenching slag and blast furnace slow cooling slag were mixed at a ratio of 7 to 9: 1 to 3, and 5 to 45% by weight of synthetic slag fine powder having an average particle diameter of 2 to 10 μm, and shrinkage. It provides a binder composition for the cross-sectional recovery mortar comprising 5% to 20% by weight of reducing agent, 0.5 to 1.5% by weight of polymer resin and 0.2 to 2% by weight of fiber.
본 발명에서 상기 시멘트는 포틀랜드 시멘트, 고로 슬래그 시멘트, 알루미나 시멘트, 초속경 시멘트로 이루어진 군에서 선택된 1종 이상을 사용할 수 있으나, 이에 한정하는 것은 아니다. In the present invention, the cement may be used one or more selected from the group consisting of Portland cement, blast furnace slag cement, alumina cement, cemented carbide, but is not limited thereto.
본 발명에서 상기 합성 슬래그 미분말은 제철소에서 선철을 생산할 때 부산물로 제조되는 것으로서 급냉에 의해 생성되는 고로 급냉 슬래그와 서냉에 의해 생성되는 고로 서냉 슬래그를 7 ~ 9 : 1 ~ 3의 중량비로 혼합한 것으로 평균입경이 2 ~ 10 μm의 수준이 되도록 볼밀, 롤러 밀 또는 진동밀 등을 이용하여 분쇄하여 얻은 것이다. In the present invention, the synthetic slag fine powder is to be produced as a by-product when producing pig iron in steel mills to mix the blast furnace quenching slag produced by quenching and the blast furnace slow cooling slag produced by slow cooling at a weight ratio of 7 to 9: 1 to 3. It is obtained by grinding using a ball mill, a roller mill or a vibration mill so that the average particle diameter is 2 ~ 10 μm.
상기 고로 급냉 슬래그 미분말은 비정질의 잠재 수경성 물질로서, 주로 콘크리트용 혼화재료 용도로 활용되고 있으며, 그 장점은 수화열에 의한 온도 상승의 억제, 알칼리 실리카 반응의 억제, 황산염이나 해수에 대한 화학저항성의 향상을 기대할 수 있지만, 중성화 저항성은 취약한 면이 있다. 반면 상기 고로 서냉 슬래그 미분말은 서냉화되어 결정화된 상태로 수경성이 없다. 수경성이 없는 충전재는 중성화 억제 효과를 발휘한다는 것이 알려져 있으며 그 메카니즘도 해명되어 있다. 이러한 재료들을 잘 이용한다면 중성화에 대한 자기방위 기능을 발휘하는 재료의 개발이 가능하리라는 예측에서 본 발명은 개발되었다. 단순한 충전재보다는 중성화를 일으키는 CO2가스와 반응하는 물질을 적용하면 탄산화 반응에 의해 경화체 표면은 매우 치밀화되어 그 이후 CO2가스가 경화체 내부로 투과하는 것을 억제한다. 고로 서냉 슬래그의 주성분인 메리라이트는 수화하지 않지만 탄산화 반응을 나타내고 조직을 치밀화시켜 후에 CO2가스가 경화체 표면으로 투과하기 어렵게 하는 작용을 한다. 따라서 고내구성을 갖게 하기 위해서 수경성인 고로 급냉 슬래그 미분말과 비수경성인 고로 서냉 슬래그 미분말을 혼합하여 기존의 고로 급냉 슬래그 미분말의 장점을 살리면서 중성화에 취약했던 부분을 비수경성 재료인 고로 서냉 슬래그 미분말이 보완하는 인텔리전트 기능을 한 것이 본 발명의 핵심이다.The blast furnace quenching slag powder is an amorphous latent hydraulic material, and is mainly used as a mixed material for concrete, and its advantages are: suppression of temperature rise by heat of hydration, suppression of alkali silica reaction, and improvement of chemical resistance to sulfate or seawater. Although it can be expected, the neutralization resistance is weak. On the other hand, the blast furnace slow cooling slag fine powder is not cooled in a slow crystallized state. It is known that fillers without hydraulic properties have a neutralizing inhibitory effect, and a mechanism thereof has been elucidated. The present invention was developed in anticipation of the development of a material that exhibits a self-defense function against neutralization if used well. Application of a material that reacts with the CO 2 gas that causes neutralization, rather than a simple filler, results in a very dense surface of the cured body by the carbonation reaction, thereby preventing the CO 2 gas from penetrating into the cured body. Merrilite, the main component of slow cooling slag, does not hydrate but exhibits carbonation reaction and densifies the structure, making it difficult for CO 2 gas to penetrate to the surface of the cured body later. Therefore, in order to have high durability, the part of vulcanized blast furnace slag powder, which is vulnerable to neutralization while utilizing the advantages of conventional blast furnace quench slag fine powder by mixing hydraulic blast furnace quench slag fine powder and non-hydraulic blast furnace slow cooling slag fine powder, Complementing the intelligent function is the core of the present invention.
본 발명에서 결합재를 제조하는 단계에서 합성슬래그 미분말은 5~45중량%로 구성되는 것이 바람직하다. 합성 슬래그 미분말이 5중량% 미만이면 얻고자 내구성능을 확보하기 어렵고, 45중량%를 초과하면 소요의 강도를 얻는데 시간이 오래 걸리고 적절한 물리 성능 발현에 어려움이 있다. Synthetic slag fine powder in the step of preparing a binder in the present invention is preferably composed of 5 to 45% by weight. If the synthetic slag fine powder is less than 5% by weight it is difficult to secure the durability to obtain, if it exceeds 45% by weight it takes a long time to obtain the required strength and there is a difficulty in expressing the appropriate physical performance.
본 발명에서 상기 수축 저감제는 칼슘 설포 알루미네이트와 석고가 4 내지 9 : 1 내지 6의 중량비로 혼합하여 제조한 것을 특징으로 하며, 그 사용양은 결합재 중 5% ~ 20중량%가 바람직하다. 5중량% 미만이면 초기 수축 팽창에 의한 균열을 제어하기 힘들고, 20중량%를 초과하면 급격한 반응으로 인한 작업시간의 확보가 어렵고 이상 팽창을 야기할 수 있는 문제점이 있다. 본 발명에서 상기 석고는 반수, 이수, 무수 석고 중에서 선택되는 1종 이상을 사용할 수 있으나, 이에 한정하는 것은 아니다.In the present invention, the shrinkage reducing agent is prepared by mixing calcium sulfo aluminate and gypsum in a weight ratio of 4 to 9: 1 to 6, the amount of the binder is preferably 5% to 20% by weight of the binder. If it is less than 5% by weight, it is difficult to control cracks due to initial shrinkage expansion, and if it exceeds 20% by weight, it is difficult to secure working time due to a sudden reaction and cause abnormal expansion. In the present invention, the gypsum may be one or more selected from hemihydrate, dihydrate, anhydrous gypsum, but is not limited thereto.
본 발명의 상기 고분자 수지는 라텍스계 고분자 수지를 사용하는 것을 특징으로 하며, 구체적으로는 EVA(ethylene-vinyl acetate)계 수지, SBA(strong base anionic)계 수지, 폴리 비닐 아세테이트계 수지에서 선택되는 1종 이상의 수지를 사용할 수 잇으나, 이에 한정하는 것은 아니다. The polymer resin of the present invention is characterized by using a latex-based polymer resin, specifically 1 selected from EVA (ethylene-vinyl acetate) resin, SBA (strong base anionic) resin, polyvinyl acetate resin Although more than one resin can be used, it is not limited thereto.
또한 본 발명에 있어서 상기 고분자 수지는 모르타르의 경화 전 상태에서 유동성 증가, 작업성 개선 효과를 나타내며, 경화 후에는 바탕면과의 부착력 증가, 응집력 증가, 굴곡강도 증가 및 굴곡성 증진, 방수성능의 향상을 꾀하는 역할을 하게 된다. In addition, in the present invention, the polymer resin exhibits an effect of increasing fluidity and workability in a state before curing of mortar, and after curing, increases adhesion to the base surface, increases cohesion, increases flexural strength and improves flexibility, and improves waterproof performance. Will play a role.
본 발명의 결합재 조성물에 있어서 상기 고분자 수지는 0.5 ~ 1.5 중량%를 사용하는 것이 바람직하며, 0.5 중량% 미만으로 사용하는 경우 그 목적을 달성하기 어렵고, 1.5중량% 초과하면 수화반응 시 수화생성물의 생성을 방해하여 강도가 저하되는 단점을 나타낸다. In the binder composition of the present invention, it is preferable that the polymer resin is used in an amount of 0.5 to 1.5% by weight, and when used in an amount of less than 0.5% by weight, it is difficult to achieve the object. The disadvantage is that the strength is lowered by disturbing.
본 발명에서 상기 섬유는 휨 강도, 인장 강도 증진은 물론 양생 시 표면 크랙을 줄일 수 있어 모르타르 시공 후 초기 시공 안정성에 효과적이며, 초기 분산성을 높이기 위한 목적으로 셀룰로오스 섬유, 폴리프로필렌 섬유 및 폴리에틸렌 섬유로부터 선택되는 1종 이상의 섬유를 사용할 수 있으나, 이에 한정하는 것은 아니다. 또한 본 발명의 결합재 조성물에 있어서, 상기 섬유는 0.2중량% ~2중량%를 사용하는 것이 바람직하며, 0.2중량% 미만이면 인장강도 및 휨 강도 개선의 효과를 볼 수 없으며, 2중량%를 초과하면 물 사용량의 증가로 작업성이 나빠지고, 고가의 재료이므로 비경제적인 문제점이 있다.
In the present invention, the fiber can improve the bending strength, tensile strength as well as reduce the surface cracks during curing, which is effective for the initial construction stability after mortar construction, from the cellulose fibers, polypropylene fibers and polyethylene fibers for the purpose of increasing the initial dispersibility One or more selected fibers may be used, but the present invention is not limited thereto. In addition, in the binder composition of the present invention, it is preferable that the fiber is used in an amount of 0.2% by weight to 2% by weight, and when the amount is less than 0.2% by weight, the effect of improving the tensile strength and the bending strength is not achieved. Increasing the amount of water used, the workability is worse, there is an expensive problem because it is an expensive material.
본 발명은, 상기 결합재와 규사를 포함하는 건조 모르타르 프리믹스 조성물을 제공한다. 구체적으로는 상기 결합재 100 중량부 및 규사 20 ~80 중량부를 포함하는 단면 복구용 건조 모르타르 프리믹스 조성물을 제공한다. 본 발명에서 상기 규사는 특별히 한정하지는 않으나, 평균 입경이 15 ~ 25mm인 중사 20내지 40중량%와 평균입경이 0.2mm ~ 1.5mm인 세사 60 내지 80중량%를 포함하는 것을 사용할 수 있고, 그 함유량은 시멘트 100중량부에 20~80중량부 인 것이 바람직하다.
The present invention provides a dry mortar premix composition comprising the binder and silica sand. Specifically, it provides a dry mortar premix composition for cross-sectional recovery comprising 100 parts by weight of the binder and 20 to 80 parts by weight of silica sand. In the present invention, the silica sand is not particularly limited, but may include those containing 20 to 40% by weight of the medium sand having an average particle diameter of 15 to 25 mm and 60 to 80% by weight of the fine yarn having an average particle diameter of 0.2 mm to 1.5 mm. It is preferable that it is 20-80 weight part with 100 weight part of silver cement.
또한, 본 발명은 상기 건조 모르타르 프리믹스 조성물 100중량부에 물 10 ~ 30 중량부로 이루어진 단면 복구용 모르타르 조성물을 제공한다.
In addition, the present invention provides a mortar composition for recovering the cross-section consisting of 10 to 30 parts by weight of water to 100 parts by weight of the dry mortar premix composition.
또한, 본 발명은 얻어진 단면 복구용 모르타르 조성물을 이용하여 보수하고자 하는 콘크리트 표면을 시공하는 방법을 제공한다. In addition, the present invention provides a method for constructing a concrete surface to be repaired using the obtained mortar composition for cross-sectional recovery.
구체적으로 상기 시공 방법은Specifically, the construction method
1) 제철소에서 급냉에 의해 생성되는 고로 급냉 슬래그와 서냉에 의해 생성되는 고로 서냉 슬래그를 7~9 : 1~3의 중량비로 혼합한 것으로 평균입경이 2~ 10 μm가 되도록 분쇄하여 합성 슬래그 미분말을 제조하는 단계;1) The blast furnace slag produced by quenching at the steel mill and the blast furnace slack cooled slag produced by slow cooling are mixed in a weight ratio of 7-9: 1 to 3, and the fine slag powder is pulverized to have an average particle diameter of 2 to 10 μm. Manufacturing;
2) 칼슘 설포 알루미네이트와 석고를 4~9 : 1~6의 중량비로 혼합하여 수축 저감제를 제조하는 단계;2) preparing a shrinkage reducing agent by mixing calcium sulfo aluminate and gypsum in a weight ratio of 4-9: 1-6;
3) 시멘트 40 ~ 85 중량%, 상기 1)에서 얻어진 합성 슬래그 미분말 5 ~ 45중량%, 상기 2)에서 얻어진 수축 저감재 5% ~ 20중량%, 고분자 수지 0.5 ~ 1.5 중량% 및 섬유 0.2 ~ 2중량%를 혼합하여 결합재 조성물을 제조하는 단계;3) 40 to 85% by weight of cement, 5 to 45% by weight of synthetic slag fine powder obtained in 1), 5% to 20% by weight of shrinkage reducing material obtained in 2), 0.5 to 1.5% by weight of polymer resin and 0.2 to 2 fiber. Mixing the wt% to prepare a binder composition;
4) 상기 3)의 단계에서 제조한 결합재 100중량부에 규사 20 ~80 중량부를 혼합하여 건조 모르타르 프리믹스 조성물을 제조하는 단계; 4) preparing a dry mortar premix composition by mixing 20 to 80 parts by weight of silica sand to 100 parts by weight of the binder prepared in step 3);
5) 상기 얻어진 건조 모르타르 프리믹스 조성물 100중량부에 물 10~30 중량부를 혼합하여 콘크리트 구조물의 단면 복구용 모르타르 조성물을 제조하는 단계; 및5) preparing 10 to 30 parts by weight of water to 100 parts by weight of the obtained dry mortar premix composition to prepare a mortar composition for recovering the cross section of the concrete structure; And
6) 상기 콘크리트 구조물의 단면 복구용 모르타르 조성물을 콘크리트 구조물의 시공면에 도포하는 단계를 포함하여 구성된다.
6) applying the mortar composition for the cross-sectional recovery of the concrete structure to the construction surface of the concrete structure.
이하 하기 실시예에 의하여 본 발명을 더욱 상세하게 설명하고자 한다. 하지만, 본 발명은 하기 실시예에 의해 한정되는 것은 아니며, 본 발명의 사상과 범위 내에서 여러 가지 변형 또는 수정할 수 있음은 이 분야에서 당업자에게는 명백한 것이다.
Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the present invention is not limited by the following examples, and various modifications or changes can be made within the spirit and scope of the present invention to those skilled in the art.
[[ 제조예Manufacturing example 1] One]
본 발명의 합성 슬래그 미분말을 고로 슬래그 제철소에서 부산물로 발생되는 고로 급냉 슬래그를 고로 서냉 슬래그와 8 : 2의 중량비로 혼합하여 평균입경이 5μm의 수준이 되도록 볼밀을 이용하여 분쇄 제조하였다.
The synthetic slag fine powder of the present invention was pulverized by using a ball mill to mix the blast furnace quenching slag generated as a by-product in the blast furnace slag steel mill with a blast furnace slow cooling slag in a weight ratio of 8: 2 to have an average particle diameter of 5 μm.
[[ 제조예Manufacturing example 2] 2]
본 발명의 수축저감제를 칼슘설포알루미네이트를 무수석고와 6 : 3의 중량비로 리본 믹서를 이용하여 혼합 제조하였다.
The shrinkage reducing agent of the present invention was prepared by mixing calcium sulfoaluminate with anhydrous gypsum and a ribbon mixer at a weight ratio of 6: 3.
[[ 실시예Example 1] One]
상기 제조예 1에서 제조한 합성슬래그 미분말 25중량%; 제조예 2에서 제조한 수축저감제 8중량%; 포틀랜드 시멘트 65 중량%, 고분자 수지 1.5 중량%, 섬유 0.5 중량%를 혼합하여 결합재를 제조하였다. 상기 제조된 결합재 100중량부에 중사 20중량부 및 세사 40 중량부를 첨가하여 건조 모르타르 프리믹스를 제조하였다. 상기 건조 모르타르 프리믹스 100 중량부에 물 20 중량부를 첨가하여 철근 콘크리트 단면복구 보수 보강용 모르타르 조성물을 제조하였다.
25% by weight of the synthetic slag fine powder prepared in Preparation Example 1; 8% by weight of the shrinkage reducing agent prepared in Preparation Example 2; A binder was prepared by mixing 65% by weight of Portland cement, 1.5% by weight of polymer resin, and 0.5% by weight of fiber. A dry mortar premix was prepared by adding 20 parts by weight of heavy yarn and 40 parts by weight of fine yarn to 100 parts by weight of the binder. 20 parts by weight of water was added to 100 parts by weight of the dry mortar premix to prepare a mortar composition for reinforced concrete cross-sectional repair repair.
[[ 실시예Example 2] 2]
상기 제조예 1에서 제조한 합성슬래그 미분말 20중량%; 제조예 2에서 제조한 수축저감제 8중량%; 포틀랜드 시멘트 70 중량%, 고분자 수지 1 중량%, 섬유 1 중량%를 혼합하여 결합재를 제조하였다. 상기 제조된 결합재 100중량부에 중사 20중량부 및 세사 40 중량부를 첨가하여 건조 모르타르 프리믹스를 제조하였다. 상기 건조모르타르 프리믹스 100중량부에 물 20 중량부를 첨가하여 철근 콘크리트 단면복구 보수 보강용 모르타르 조성물을 제조하였다.
20% by weight of the synthetic slag fine powder prepared in Preparation Example 1; 8% by weight of the shrinkage reducing agent prepared in Preparation Example 2; A binder was prepared by mixing 70% by weight of Portland cement, 1% by weight of polymer resin, and 1% by weight of fiber. A dry mortar premix was prepared by adding 20 parts by weight of heavy yarn and 40 parts by weight of fine yarn to 100 parts by weight of the binder. 20 parts by weight of water was added to 100 parts by weight of the dry mortar premix to prepare a mortar composition for reinforced concrete cross-sectional repair repair.
[[ 실시예Example 3] 3]
상기 제조예 1에서 제조한 합성슬래그 미분말 25중량%; 제조예 2에서 제조한 수축저감제 15중량%; 포틀랜드 시멘트 58 중량%, 고분자 수지 1 중량%, 섬유 1 중량%를 혼합하여 결합재를 제조하였다. 상기 제조된 결합재 100중량부에 중사 20중량부 및 세사 40 중량부를 첨가하여 건조 모르타르 프리믹스를 제조하였다. 상기 건조 모르타르 프리믹스 100중량부에 물 20 중량부를 첨가하여 철근 콘크리트 단면복구 보수 보강용 모르타르 조성물을 제조하였다.
25% by weight of the synthetic slag fine powder prepared in Preparation Example 1; 15 wt% shrinkage reducing agent prepared in Preparation Example 2; A binder was prepared by mixing 58% by weight of Portland cement, 1% by weight of polymer resin, and 1% by weight of fiber. A dry mortar premix was prepared by adding 20 parts by weight of heavy yarn and 40 parts by weight of fine yarn to 100 parts by weight of the binder. 20 parts by weight of water was added to 100 parts by weight of the dry mortar premix to prepare a mortar composition for reinforced concrete cross-sectional repair repair reinforcement.
[[ 비교예Comparative example 1] One]
포틀랜드 시멘트 70중량%, 고로슬래그 미분말 15 중량%, 칼슘설포알루미네이트 8중량%, 석고 5 중량%, 섬유 1%, 고분자 수지 1%로 구성되는 결합재 100중량부에 중사 20중량부 및 세사 40 중량부를 첨가하여 건조 모르타르 프리믹스를 제조하였다. 상기 건조 모르타르 프리믹스 100중량부에 물 20 중량부를 첨가하여 모르타르 조성물을 제조하였다.
Portion Cement 70% by weight, Blast furnace slag fine powder 15% by weight, Calcium sulfoaluminate 8% by weight, Gypsum 5% by weight, Fiber 1%, 100% by weight of the binder composed of 1% of polymer resin Part was added to prepare a dry mortar premix. A mortar composition was prepared by adding 20 parts by weight of water to 100 parts by weight of the dry mortar premix.
[성능 평가][Performance evaluation]
상기 실시예 및 비교예에서 제조된 모르타르 조성물을 이용하여 KS F 4042 콘크리트 구조물 보수용 폴리머 시멘트 모르타르 시험 방법에 준하여 시험을 실시하였다. 그 결과를 하기 표 1에 나타내었다.
Using the mortar composition prepared in the above Examples and Comparative Examples, the test was carried out according to the KS F 4042 polymer cement mortar test method for repairing concrete structures. The results are shown in Table 1 below.
(침투깊이mm)Chloride Ion Penetration Resistance
Penetration depth mm
상기 표 1과 같이, 시험한 결과 모든 실시예에서 품질기준을 만족하는 값을 얻을 수 있었고, 비교예 1에 비해 뛰어난 성능을 발현하고 있는 것을 확인하였다.As shown in Table 1, as a result of the test was able to obtain a value that satisfies the quality standards in all Examples, it was confirmed that the excellent performance compared to Comparative Example 1.
또한, 실시예 1 및 3의 경우 실시예 2에 비해 합성슬래그 미분말이 5% 더 추가됨으로 인해 중성화 저항성 및 염화물 이온 침투 저항성이 보다 개선되는 것을 확인 할 수 있어 본 발명의 합성슬래그 미분말의 중성화억제효과 및 염화물 이온침투저항성의 효과를 나타내는 것을 확인할 수 있었다.In addition, in the case of Examples 1 and 3, since the synthetic slag fine powder is added 5% more than Example 2, it can be confirmed that the neutralization resistance and chloride ion penetration resistance are more improved, and thus the neutralization inhibitory effect of the synthetic slag fine powder of the present invention is improved. And it was confirmed that the effect of chloride ion penetration resistance.
또한, 실시예 3의 경우 실시예 1과 실시예 2에 비해 수축저감제가 더 첨가됨으로 인해 휨 강도, 압축강도, 부착강도의 개선을 가져오며, 길이변화율도 거의 무수축에 가까운 낮은 값을 나타내는 것을 확인하였다. 이는 본 발명의 수축저감제 효과에 의한 강도개선 효과와 수축 팽창으로 인한 균열 저감의 효과를 가져오는 것을 확인하는 결과이다.In addition, in the case of Example 3, the shrinkage reducing agent is added compared to Examples 1 and 2, resulting in improvement of bending strength, compressive strength, and adhesive strength, and the rate of change of length also shows a low value close to non-shrinkage. Confirmed. This is a result of confirming that the effect of reducing the strength due to the strength improvement effect and shrinkage expansion by the shrinkage reducing effect of the present invention.
Claims (10)
40 to 85% by weight of cement, blast furnace quenching slag and blast furnace slow cooling slag in a weight ratio of 7 to 9: 1 to 3, 5 to 45% by weight of synthetic slag fine powder with an average particle diameter of 2 to 10 μm, shrinkage reducing material 5 A binder composition for cross-sectional recovery mortar comprising% to 20% by weight, 0.5 to 1.5% by weight of polymer resin and 0.2 to 2% by weight of fibers.
The binder composition according to claim 1, wherein the cement is at least one selected from the group consisting of portland cement, blast furnace slag cement, alumina cement, and cemented carbide cement.
The binder composition according to claim 1, wherein the shrinkage reducing agent is mixed with calcium sulfo aluminate and gypsum in a ratio of 4-9: 1-6.
The binder composition according to claim 3, wherein the gypsum is at least one selected from hemihydrate, dihydrate, and anhydrous gypsum.
The binder composition according to claim 1, wherein the polymer resin is at least one selected from the group consisting of EVA-based resin SBA-based resin and polyvinylacetate-based resin.
The binder composition according to claim 1, wherein the fibers are at least one member selected from the group consisting of cellulose fibers, polypropylene fibers, and polyethylene fibers.
Dry mortar premix composition for cross-sectional recovery comprising 100 parts by weight of the binder composition of any one of claims 1 to 6 and 20 to 100 parts by weight of silica sand.
The method of claim 7, wherein the silica sand 20 to 40% by weight medium sand having an average particle diameter of 15 to 25mm and 60 to 80% by weight of the fine yarn having an average particle diameter of 0.2mm to 1.5mm for cross section recovery Dry mortar premix composition.
Mortar composition for the cross-sectional recovery consisting of 100 parts by weight of dry mortar premix composition of claim 7 and 10 to 30 parts by weight of water.
2) 칼슘 설포 알루미네이트와 석고를 4~9 : 1~6의 중량비로 혼합하여 수축 저감제를 제조하는 단계;
3) 시멘트 40 ~ 85 중량%, 상기 1)에서 얻어진 합성 슬래그 미분말 5 ~ 45중량%, 상기 2)에서 얻어진 수축 저감재 5% ~ 20중량%, 고분자 수지 0.5 ~ 1.5 중량% 및 섬유0.2 ~ 2중량%를 혼합하여 결합재 조성물을 제조하는 단계;
4) 상기 3)의 단계에서 제조한 결합재 100중량부에 규사 20 ~80 중량부를 혼합하여 건조 모르타르 프리믹스 조성물을 제조하는 단계;
5) 상기 얻어진 건조 모르타르 프리믹스 조성물 100중량부에 물 10~30 중량부를 혼합하여 콘크리트 구조물의 단면 복구용 모르타르 조성물을 제조하는 단계; 및
6) 상기 콘크리트 구조물의 단면 복구용 모르타르 조성물을 콘크리트 구조물의 시공면에 도포하는 단계;
를 포함하는 콘크리트 구조물의 단면 보수 보강 방법.1) The blast furnace slag produced by quenching at the steel mill and the blast furnace slack cooled slag produced by slow cooling are mixed in a weight ratio of 7-9: 1 to 3, and the fine slag powder is pulverized to have an average particle diameter of 2 to 10 μm. Manufacturing;
2) preparing a shrinkage reducing agent by mixing calcium sulfo aluminate and gypsum in a weight ratio of 4-9: 1-6;
3) 40 to 85% by weight of cement, 5 to 45% by weight of synthetic slag fine powder obtained in 1), 5 to 20% by weight of shrinkage reducing material obtained in 2), 0.5 to 1.5% by weight of polymer resin and 0.2 to 2 fiber Mixing the wt% to prepare a binder composition;
4) preparing a dry mortar premix composition by mixing 20 to 80 parts by weight of silica sand to 100 parts by weight of the binder prepared in step 3);
5) preparing 10 to 30 parts by weight of water to 100 parts by weight of the obtained dry mortar premix composition to prepare a mortar composition for recovering the cross section of the concrete structure; And
6) applying the mortar composition for the cross-sectional recovery of the concrete structure to the construction surface of the concrete structure;
Section repair reinforcement method of the concrete structure comprising a.
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