KR100784493B1 - Light weight hybrid repair mortar composition - Google Patents

Light weight hybrid repair mortar composition Download PDF

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KR100784493B1
KR100784493B1 KR1020070046650A KR20070046650A KR100784493B1 KR 100784493 B1 KR100784493 B1 KR 100784493B1 KR 1020070046650 A KR1020070046650 A KR 1020070046650A KR 20070046650 A KR20070046650 A KR 20070046650A KR 100784493 B1 KR100784493 B1 KR 100784493B1
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mortar
mortar composition
lightweight
repair
powder
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KR1020070046650A
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손석제
김경환
허정
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(주)에이치비티
(주)다음기술단
효림이엔아이(주)
(주)대도엔지니어링
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00Use 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
    • C04B14/02Granular materials, e.g. microballoons
    • C04B14/26Carbonates
    • C04B14/28Carbonates of calcium
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B16/00Use 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
    • C04B16/04Macromolecular compounds
    • C04B16/06Macromolecular compounds fibrous
    • C04B16/0675Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B16/0691Polyamides; Polyaramides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/02Agglomerated materials, e.g. artificial aggregates
    • C04B18/027Lightweight materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/008Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24Macromolecular compounds
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/02Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/304Air-entrainers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/40Surface-active agents, dispersants
    • C04B2103/408Dispersants
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/72Repairing or restoring existing buildings or building materials

Abstract

A low-weight hybrid mortar composition is provided to carry out repairing, recover from neutralization and surface reinforcement of concrete damaged by neutralization or salt infiltration, to allow realization of initial and long-term strength, and to improve the adhesion and durability. A low-weight hybrid mortar composition is obtained by mixing, at room temperature under atmospheric pressure: 30.0-40.0 wt% of cement; 5.0-15.0 wt% of a ferrite-based low-weight aggregate; 5.0-15.0 wt% of calcium carbonate powder; 0.2-1.0 wt% of an acrylic resin; 1.0-2.0 wt% of a vinyl resin; 0.2 wt% of a calcium sulfoaluminate-based swelling agent; 1.0-3.5 w% of a calcium oxide-based swelling agent; 1.0-3.5 wt% of anhydrite; 0.1-0.5 wt% of nylon fibers; 0.1-0.5 wt% of dispersant; 0.01-0.02 wt% of air entraining agent; and 30.0-45.0 wt% of silica sand. The nylon fiber has 800 MPa of tensile strength and is staple fiber type.

Description

경량 하이브리드 보수 모르타르 조성물{Light Weight Hybrid Repair Mortar Composition}Light Weight Hybrid Repair Mortar Composition

도 1은 본 발명에 따른 경량 하이브리드 보수 모르타르 조성물의 구성 성분을 나타낸 도면, 1 is a view showing the components of the lightweight hybrid repair mortar composition according to the present invention,

도 2는 본 발명에 따른 경량 하이브리드 보수 모르타르의 모르타르 단위 중량을 비교한 상태를 나타낸 도면, 2 is a view showing a state of comparing the mortar unit weight of the light weight hybrid repair mortar according to the present invention,

도 3은 본 발명에 따른 경량 하이브리드 보수 모르타르의 플로우 경시 변화를 나타낸 도면, 3 is a view showing a change over time of the lightweight hybrid maintenance mortar according to the present invention,

도 4는 본 발명에 따른 경량 하이브리드 보수 모르타르의 재령별 압축강도의 변화를 비교한 상태를 나타낸 도면, 4 is a view showing a state comparing the changes in compressive strength for each age of lightweight hybrid maintenance mortar according to the present invention,

도 5는 본 발명에 따른 경량 하이브리드 보수 모르타르의 재령별 휨 강도의 변화를 비교한 상태를 나타낸 도면, 5 is a view showing a state comparing the changes in bending strength for each age of lightweight hybrid maintenance mortar according to the present invention,

도 6은 본 발명에 따른 경량 하이브리드 보수 모르타르의 부착 강도의 변화를 비교한 상태를 나타낸 도면, 6 is a view showing a state comparing the change in the adhesion strength of the lightweight hybrid maintenance mortar according to the present invention,

도 7은 본 발명에 따른 경량 하이브리드 보수 모르타르의 열팽창계수를 나타낸 도면, 7 is a view showing a thermal expansion coefficient of the lightweight hybrid maintenance mortar according to the present invention,

도 8은 본 발명에 따른 경량 하이브리드 보수 모르타르의 길이 변화 상태를 나타낸 도면, 8 is a view showing a length change state of the lightweight hybrid maintenance mortar according to the present invention;

도 9는 본 발명에 따른 경량 하이브리드 보수 모르타르의 중성화 깊이를 나타낸 도면이다. 9 is a view showing the neutralization depth of the lightweight hybrid maintenance mortar according to the present invention.

본 발명은 중성화, 염해, 황산염의 침식 등과 같은 각종 열화 현상에 의해 손상된 콘크리트를 제거하고 구조체로서의 역할을 다시 수행할 수 있도록 단면의 복구를 위해 적용되는 경량 하이브리드 보수 모르타르 조성물에 관한 것이다.The present invention relates to a lightweight hybrid repair mortar composition which is applied for the recovery of the cross section so as to remove concrete damaged by various deterioration phenomena such as neutralization, salt damage, erosion of sulfate, etc., and to perform a role as a structure again.

일반적으로, 철근콘크리트 구조물은 동결융해, 염해, 중성화, 화학약품 등과 같은 여러 가지 요인에 의하여 손상을 입는 열화가 일어나게 되는 바, 손상이 심한 경우에는 콘크리트가 탈락되고 콘크리트 중의 철근이 노출되거나 내부에서 부식되어 그 내구성 및 내하력이 저하되는 결과를 초래함에 따라 구조물의 사용연한이 줄어드는 등의 문제가 발생하게 된다.In general, reinforced concrete structures are damaged due to various factors such as freezing-thawing, salting, neutralization, chemicals, etc. In the case of severe damage, the concrete is dropped and the steel in the concrete is exposed or corroded inside. As a result, the durability and the load capacity are reduced, resulting in a decrease in the service life of the structure.

이러한 철근콘크리트 구조물의 열화 부위를 보수 또는 보강하기 위해, 열화 손상된 콘크리트를 제거하여 철근에 대한 보수 또는 보강을 실시한 후 콘크리트가 제거된 부분을 다시 원상으로 복구하기 위하여 미장 또는 뿜어붙이기에 의한 시공법이 적용되고 있다. In order to repair or reinforce the deteriorated portion of the reinforced concrete structure, the construction method by plastering or spraying is applied to repair or reinforce the reinforcing bar by removing the deteriorated damaged concrete and then to restore the part where the concrete has been removed. It is becoming.

상기 뿜어붙이기 보수공법의 모르타르에 대해서는 국내 등록특허 제 0412339 호(발명의 명칭:구조물 보수재 조성물)과, 국내 공개특허 제 2005-0032358호(발명의 명칭:조강형 수중 불분리 단면복구 시멘트 조성물), 국내 공개특허 제 2005-0032359호(발명의 명칭:단면 주입용 저수축 그라우트 몰탈 조성물), 국내 등록특허 제 0405022호(발명의 명칭:콘크리트 보수용 몰타르 조성물) 등의 기술이 제안되어 있는 상태인 바, 이러한 기술을 활용한 뿜어붙이기 보수공법들은 간편하고 신속하게 보수할 수 있는 장점이 있다. As for the mortar of the spraying repair method, registered Korean Patent No. 0412339 (name of the invention: structure repair material composition), and Korean Patent Publication No. 2005-0032358 (name of invention: crude steel type underwater fire separation cross-sectional recovery cement composition), domestic It is a state that the technology such as Unexamined Patent No. 2005-0032359 (name of the invention: low shrinkage grout mortar composition for cross-section injection), Korean Patent No. 0405022 (name of the invention: mortar composition for concrete repair) has been proposed, Spraying repair methods using this technique has the advantage of easy and quick repair.

또한, 거푸집을 이용하는 보수방법으로는 국내 등록특허 제 04003397호(발명의 명칭:복개천의 노후 콘크리트 구조물 보수방법)의 기술이 제안되어 있는데, 이 기술은 특수한 경우에 적용되고 있다. In addition, as a method of repair using formwork, a technique of Korean Patent No. 04003397 (name of the invention: repair method of old concrete structure of a thousand streams) is proposed, and this technique is applied to a special case.

그러나, 이러한 종래의 콘크리트 보수 방법에 적용되는 모르타르 조성물은 콘크리트 구조물에 손상을 주는 열화 요인에 대한 영향 인자를 고려하여 제조한 것으로서, 콘크리트 구조물과의 역학적 거동을 고려하고 보수 모르타르의 작업성 및 부착성능과 자중에 의한 굳기 전 부착성능 등을 함께 고려한 체계적인 배합 방식이 적용되어 있지 않기 때문에, 외부로부터 가해지는 미세진동, 다층 시공 등의 각종 부착 저해 요소에 의하여 보수 모르타르가 조기에 탈락되거나 균열이 발생될 가능성이 있다는 문제점이 있다. However, the mortar composition applied to the conventional concrete repair method is prepared in consideration of the influencing factors on the deterioration factors that damage the concrete structure, considering the mechanical behavior with the concrete structure and workability and adhesion performance of the repair mortar Since the systematic mixing method considering the adhesion performance before hardening due to excessive weight is not applied, repair mortar may be prematurely dropped or cracked due to various attachment inhibitory factors such as micro vibration and multilayer construction applied from the outside. There is a problem that there is a possibility.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 이루어진 것으로서, 그 목적은 중성화, 염해 및 황산염의 침식 등과 같은 각종 열화 현상에 의해 손상된 콘크리트의 보수 후의 단면복구 및 중성화 회복, 표층 강화가 가능하 고, 초기 및 장기 강도의 발현이 가능할 뿐 아니라 천정부분에 50mm 이상의 두께를 한번에 시공이 가능하고 장기적으로 진동이 존재하는 경우에도 부착이 가능하여 차량의 통행을 방해하지 않고 교량 슬래브 하부를 보수할 수 있으며 장기적으로도 진동 등에 우수한 부착성능을 발휘하는 것이 가능한 경량 하이브리드 보수 모르타르 조성물을 제공하는 것이다. Accordingly, the present invention has been made to solve the conventional problems as described above, the object of which is to recover the cross-sectional recovery and neutralization after repairing concrete damaged by various degradation phenomena such as neutralization, salt and erosion of sulphate, reinforcement of the surface layer. In addition, the initial and long-term strength can be expressed, and the ceiling can be installed at a thickness of 50mm or more at once, and it can be attached even when vibration exists for a long time. It is possible to provide a light weight hybrid repair mortar composition capable of exhibiting excellent adhesion in vibration and the like in the long term.

상기한 목적을 달성하기 위해 본 발명에 따르면, 상온, 대기압의 조건에서 30.0∼40.0%의 시멘트에, 5.0∼15.0%의 페라이트계 경량골재와, 5.0∼15.0%의 탄산칼슘(CaCo3) 분말, 0.2∼1.0%의 아크릴수지(Acrylic Resin), 1.0∼2.0%의 비닐수지(Vinyl resin), 0.2%의 CSA(Calcium Sulphoaluminate)계 팽창제, 1.0∼3.5%의 산화칼슘(CaO)계 팽창제, 1.0∼3.5%의 무수석고(Anhydrous Gypsum), 0.1∼0.5%의 나일론 섬유(Nylon Fiber), 0.1∼0.5%의 분산제(Dispersion Agent), 0.01∼0.02%의 분말 기포연행제(Air entraining agent), 30.0∼45.0%의 규사(Silica Sand)를 구성 성분으로 하는 중량 비율로 혼합하여 이루어진 것을 특징으로 하는 경량 하이브리드 보수 모르타르 조성물을 제공한다.In order to achieve the above object, according to the present invention, at room temperature and atmospheric pressure, 30.0-40.0% of cement, 5.0-15.0% of ferritic lightweight aggregate, 5.0-15.0% of calcium carbonate (CaCo 3 ) powder, 0.2-1.0% acrylic resin, 1.0-2.0% vinyl resin, 0.2% CSA (Calcium Sulphoaluminate) expander, 1.0-3.5% calcium oxide (CaO) -based expander, 1.0- 3.5% Anhydrous Gypsum, 0.1-0.5% Nylon Fiber, 0.1-0.5% Dispersion Agent, 0.01-0.02% Powder Entraining Agent, 30.0- It provides a light weight hybrid repair mortar composition comprising 45.0% of silica sand as a component by weight.

이하, 상기한 바와 같이 구성된 본 발명에 대해 첨부도면을 참조하여 상세히 설명한다. Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

즉, 도 1은 본 발명에 따른 경량 하이브리드 보수 모르타르 조성물의 구성 성분을 나타낸 도면이다. That is, Figure 1 is a view showing the components of the lightweight hybrid maintenance mortar composition according to the present invention.

도 1에 도시된 바와 같이, 본 발명에 따른 경량 하이브리드 보수 모르타르 조성물은, 상온, 대기압의 조건에서 30.0∼40.0%의 시멘트에, 5.0∼15.0%의 페라이트계 경량골재와, 5.0∼15.0%의 분말 형태 탄산칼슘(CaCo3), 0.2∼1.0%의 아크릴수지(Acrylic Resin), 1.0∼2.0%의 비닐수지(Vinyl resin), 팽창제로서 0.2%의 CSA(Calcium Sulphoaluminate), 팽창제로서 1.0∼3.5%의 산화칼슘(CaO), 1.0∼3.5%의 무수석고(Anhydrous Gypsum), 0.1∼0.5%의 나일론 섬유(Nylon Fiber), 0.1∼0.5%의 분산제(Dispersion Agent), 0.01∼0.02%의 분말 기포연행제(Air entraining agent), 30.0∼45.0%의 규사(Silica Sand)를 구성 성분으로 하는 중량 비율로 혼합하여 이루어진다.As shown in Figure 1, the lightweight hybrid maintenance mortar composition according to the present invention, at room temperature, atmospheric pressure, 30.0-40.0% cement, 5.0-15.0% ferrite-based lightweight aggregate, 5.0-15.0% powder Form Calcium Carbonate (CaCo 3 ), 0.2-1.0% Acrylic Resin, 1.0-2.0% Vinyl Resin, 0.2% CSA (Calcium Sulphoaluminate) as Expanding Agent, 1.0-3.5% as Expanding Agent Calcium Oxide (CaO), 1.0-3.5% Anhydrous Gypsum, 0.1-0.5% Nylon Fiber, 0.1-0.5% Dispersion Agent, 0.01-0.02% Powder Foam Entrainer (Air entraining agent), it is made by mixing in a weight ratio of 30.0 to 45.0% of silica sand (Silica Sand) as a component.

상기 경량 하이브리드 보수 모르타르 조성물은 시멘트와, 페라이트계 경량골재, 탄산칼슘 분말(CaCo3), 아크릴수지, 비닐수지, CSA계 팽창제, 산화칼슘(CaO); 무수석고, 나일론 섬유, 분산제, 분말 기포연행제, 규사를 중량 비율로 모르타르 믹서에 모두 넣고 약 2분동안 건식 상태에서 믹싱하여 얻어진다. The lightweight hybrid maintenance mortar composition may include cement, ferrite-based lightweight aggregate, calcium carbonate powder (CaCo3), acrylic resin, vinyl resin, CSA-based expander, calcium oxide (CaO); Anhydrous gypsum, nylon fiber, dispersant, powder bubble entrainer, and silica sand are all obtained by mixing in a mortar mixer in a weight ratio in a dry state for about 2 minutes.

상기 페라이트계 경량골재는 밀도가 0.03~0.25kg/ℓ인 매우 가벼운 골재로서 적당량 사용하면 성능의 저하없이 모르타르나 콘크리트의 단위 중량을 낮출 수 있으며, 화학적으로 중성인 불연성 무기질 재료이므로 인체에 해가 없다.The ferritic lightweight aggregate is a very light aggregate having a density of 0.03 to 0.25 kg / l, and if used in an appropriate amount, the unit weight of mortar or concrete can be lowered without deterioration of performance, and it is chemically neutral incombustible inorganic material, so it is not harmful to the human body. .

상기 팽창제는 모르타르의 침하 수축(Settlement Shrinkage) 및 건조 수축에 의한 모르타르 및 콘크리트의 균열이 발생되는 것을 억제하는 것으로서, CSA 계 팽창제는 재령 7일까지 수축을 억제할 수 있는 역할을 하고, CaO 계 팽창재는 재령 21일까지의 수축을 억제할 수 있는 역할을 한다. The expanding agent is to suppress the generation of mortar and concrete cracks due to the settlement shrinkage (mortar) and drying shrinkage of the mortar, the CSA-based expansion agent serves to suppress the shrinkage until 7 days, CaO-based expansion material Plays a role in suppressing contraction up to 21 days of age.

상기 아크릴 및 비닐 수지는 고분자 입자의 볼베어링 효과에 의해 모르타르의 유동성을 향상시키는 역할을 하며, 모르타르의 점성을 높게 하여 분리를 방지하고, 자체의 부착력으로 기존 콘크리트와의 부착성능을 향상시키면서 휨강도 및 모르타르의 표면 경도가 증가될 수 있도록 할 뿐만 아니라, 피막 형성에 의한 가가종 화학물질 및 수분의 침투를 저하시키므로 중성화 방지 효과가 있고 보수 후 철근의 부식을 미연에 방지할 수 있도록 한다. The acrylic and vinyl resins play a role of improving the flowability of mortar by the ball bearing effect of the polymer particles, preventing the separation by increasing the viscosity of the mortar, and improving the adhesion performance of the existing concrete with its own adhesive strength and bending strength and mortar Not only to increase the surface hardness of, but also to reduce the penetration of false chemicals and water due to the film formation has a neutralizing effect and to prevent the corrosion of the reinforcing steel after repair.

상기 나일론 섬유는 표준 길이가 6㎜이고 인장 강도가 800MPa 이상을 갖는 직경 20micron의 단섬유로서, 상기 모르타르의 제조시에 혼합하여 초기 수축 균열의 억제, 균열 확산 억제, 충격 파손 및 마모, 피로 하중에 대한 저항력 증대, 휨강도 및 인성을 증대시키는데 사용된다. The nylon fiber is a short fiber of 20 microns in diameter having a standard length of 6 mm and a tensile strength of 800 MPa or more, and is mixed at the time of production of the mortar to suppress initial shrinkage cracking, crack diffusion suppression, impact breakage and abrasion, and fatigue load. It is used to increase resistance, flexural strength and toughness.

상기 모르타르 분체입자 분산제는 나프탈렌 또는 멜라닌계의 고성능 감수제로서, 그 유효 분자가 시멘트 및 각종 분체에 흡착하여 표면전하를 증가시켜, 정전기적 반발력으로 시멘트 등 미분체 입자의 응집을 분산하고, 물이나 공기포를 해방시켜 페이스트의 유동성을 높게 한다.The mortar powder particle dispersant is a naphthalene or melanin-based high performance sensitizer, the effective molecule of which is adsorbed on cement and various powders to increase the surface charge, to disperse the aggregation of fine particles such as cement with electrostatic repulsion, water or air Release the fabric to increase the fluidity of the paste.

본 발명에서는 상기 경량 하이브리드 보수 모르타르의 목표 압축강도를 재령 28일에 35~55 MPa로 하고, 목표 플로우를 170± 10mm로 하였다.In the present invention, the target compressive strength of the light weight hybrid repair mortar was 35 to 55 MPa at 28 days of age, and the target flow was 170 ± 10 mm.

도 2는 본 발명에 따른 경량 하이브리드 보수 모르타르의 모르타르 단위 중량을 비교한 상태를 나타낸 도면으로서, 동 도면에 나타난 바와 같이 본 발명에 따른 경량 하이브리드 보수 모르타르의 굳기 전, 굳은 후의 단위중량이 1.65∼1.85 ton/㎥으로 나타나므로, 2.0∼2.25 ton/㎥의 단위중량을 갖는 A,B,C의 일반 보수모르타르에 비해서 70∼80% 수준으로 굳기전의 상태에서 우수한 부착력을 가질 수 있다. 2 is a view showing a state in which the mortar unit weight of the light weight hybrid repair mortar according to the present invention is compared. As shown in the drawing, the unit weight of the light weight hybrid repair mortar according to the present invention before and after solidification is 1.65 to 1.85. Since it is represented by ton / m 3, it may have excellent adhesion in the state before hardening at a level of 70 to 80% compared to general repair mortars of A, B, and C having a unit weight of 2.0 to 2.25 ton / m 3.

다음에, 도 3은 본 발명에 따른 경량 하이브리드 보수 모르타르의 플로우 경시 변화를 나타낸 도면으로서, 동 도면에 나타난 바와 같이 본 발명에 따른 경량 보수 모르타르의 경시 변화에 따른 플로우 변화는, 60분의 경과 시간까지 20분 간격으로 경과시간에 따른 플로우 변화를 측정한 결과 경과시간 60분에서도 플로우 값이 초기값의 85% 이상을 나타내어 시공성이 충분하여 시공성을 고려한 가사시간을 충분히 만족하는 결과를 나타내었다.Next, FIG. 3 is a view showing changes in flow over time of the light-weight hybrid repair mortar according to the present invention. As shown in the figure, the flow change according to the time-dependent change of the lightweight repair mortar according to the present invention is an elapsed time of 60 minutes. As a result of measuring the flow change according to the elapsed time at 20 minute intervals, even when the elapsed time was 60 minutes, the flow value showed more than 85% of the initial value, and the workability was sufficient, which satisfies the pot life considering workability.

도 4는 본 발명에 따른 경량 하이브리드 보수 모르타르의 재령별 압축강도의 변화를 비교한 상태를 나타낸 도면으로서, 모르타르에 대하여 KS F 4042에 준하여 시험하였으며, 소정의 재령까지 20± 2℃의 온도에서 수중양생 후에, 재령 28일까지 압축 강도를 측정하였다. Figure 4 is a view showing a comparison of the change in compressive strength of each of the lightweight hybrid maintenance mortar according to the present invention, the mortar was tested in accordance with KS F 4042, underwater at a temperature of 20 ± 2 ℃ until a predetermined age After curing, the compressive strength was measured by 28 days of age.

그 결과, 도 4에 나타난 바와 같이 본 발명에 따른 경량 보수 모르타르의 재령별 압축 강도는, 상기 모르타르가 KS F 기준인 20 MPa 이상을 발현하였으며, 특히 목표 재령 28일 압축강도가 40 Mpa 이상을 발현하였으므로 규격을 충분히 상회할 뿐 아니라 구조물의 일부로 구조적 역할을 충분히 감당할 수 있도록 되어 있다.As a result, as shown in Figure 4, the compressive strength of each of the lightweight maintenance mortar according to the present invention, the mortar expressed more than 20 MPa KS F criterion, in particular the target age 28 days expressing more than 40 Mpa Not only does it exceed the specification, it is also able to play a structural role as part of the structure.

다음에, 도 5는 본 발명에 따른 경량 하이브리드 보수 모르타르의 재령별 휨 강도의 변화를 비교한 상태를 나타낸 도면으로서, 상기 모르타르를 몰드 성형 후에 20± 2℃의 온도와, 65± 1 0%의 습도 조건에서 24시간 양생하고, 탈형한 이후에 20± 2℃의 온도에서 양생수조에서 수중 양생하여 각 재령에 맞추어 꺼내어 시험하였다. Next, FIG. 5 is a view showing a state in which the change in the bending strength of the lightweight hybrid maintenance mortar according to the present invention is compared. The mortar is formed at a temperature of 20 ± 2 ° C. and 65 ± 10% after molding. Cured under humidity conditions for 24 hours, and after demolding, the solution was cured in a curing bath at a temperature of 20 ± 2 ° C., taken out at each age, and tested.

그 결과, 본 발명에 따른 경량 하이브리드 보수 모르타르의 재령별 휨강도는 휨강도 시험을 위해 지점간 거리를 10㎝로 하고 각 모르타르의 옆면 중앙에 매초 50± 10N의 하중속도를 갖는 최대 하중을 가하여 휨강도를 측정한 결과, KS F 규준 6 MPa 이상인 재령 28일에서의 휨강도가 80 MPa 이상을 발휘하고 있으며, 타사의 일반 보수 모르타르보다 현저히 양호한 휨강도를 나타내고 있다.As a result, the bending strength for each age of the lightweight hybrid maintenance mortar according to the present invention is 10cm for the bending strength test, and the bending strength is measured by applying a maximum load having a load speed of 50 ± 10N per second to the center of the side of each mortar. As a result, the flexural strength at the age of 28 days with the KS F norm of 6 MPa or more exhibits 80 MPa or more, and shows a significantly better flexural strength than the general repair mortars of other companies.

도 6은 본 발명에 따른 경량 하이브리드 보수 모르타르의 부착 강도의 변화를 비교한 상태를 나타낸 도면으로서, 모르타르에 대한 소정의 양생이 끝난 후, 모르타르 시료 도포면에 접착제를 바르고 상부 인장용 지그를 올려놓고 접착시켜서 시료면에 대해 수직방향으로 10㎜/min의 하중속도로 인장력을 가하여 최대 인장 하중을 가할때의 탈락 발생에 따른 부착 강도를 측정하게 된다. Figure 6 is a view showing a comparison of the change in adhesion strength of the light weight hybrid repair mortar according to the present invention, after the predetermined curing for the mortar, apply the adhesive on the mortar sample coating surface and put the upper tension jig on the adhesive By applying a tensile force at a load speed of 10 mm / min in the vertical direction with respect to the sample surface to measure the adhesion strength according to the occurrence of dropping when the maximum tensile load is applied.

그 결과, 도 6에 도시된 바와 같이 본 발명에 따른 경량 하이브리드 보수 모르타르의 부착 강도는, 상기 모르타르의 부착강도가 KS F 규준인 1 MPa 이상을 휠씬 상회하는 3.5 MPa 이상을 발휘하고 있어서, 2.2∼2.8 MPa에 불과한 A,B,C의 일반 보수 모르타르보다 현저히 양호한 부착 강도를 나타내고 있다.As a result, as shown in Fig. 6, the adhesion strength of the light weight hybrid repair mortar according to the present invention exhibits 3.5 MPa or more in which the adhesion strength of the mortar is much higher than 1 MPa or more, which is the KS F standard. Adhesion strength is remarkably better than that of general repair mortars of A, B and C, which is only 2.8 MPa.

도 7은 본 발명에 따른 경량 하이브리드 보수 모르타르의 열팽창계수를 나타낸 도면으로서, 동 도면에 나타난 바와 같이 본 발명에 따른 경량 하이브리드 보수 모르타르의 열팽창 계수를 비교하여 보면, 모르타르의 열팽창계수가 각각 1.1~1.2× 10-5/℃ 정도로 콘크리트의 열팽창계수와 비슷한 범위를 나타내고 있는 것을 알 수 있다. 7 is a view showing the thermal expansion coefficient of the lightweight hybrid maintenance mortar according to the present invention, as shown in the figure when comparing the thermal expansion coefficient of the lightweight hybrid maintenance mortar according to the present invention, the thermal expansion coefficient of the mortar 1.1 to 1.2, respectively It can be seen that the range is similar to the thermal expansion coefficient of concrete at about 10-5 / ° C.

즉, 보수 모르타르의 열팽창계수가 기존 콘크리트와 크게 차이가 나는 경우에는, 보수 후에 두 재료간의 계면에 들뜸 현상이 나타나 부착이 약해져 구조적으로 불안정하게 되는데, 본 발명에 따른 경량 하이브리드 보수 모르타르는 이러한 우려없이 콘크리트의 열팽창 계수와 유사한 범위를 나타내고 있어서, 콘크리트와 일체로 거동을 하는 것이 가능하게 되면서 구조적인 안정화가 가능하게 된다.In other words, if the coefficient of thermal expansion of the repair mortar is significantly different from the existing concrete, after the repair, the interface between the two materials is lifted up and the adhesion becomes weak, resulting in structural instability. Since the concrete exhibits a range similar to the coefficient of thermal expansion of concrete, it becomes possible to behave integrally with the concrete while allowing structural stabilization.

다음에, 도 8은 본 발명에 따른 경량 하이브리드 보수 모르타르의 길이 변화 상태를 나타낸 도면으로서, 모르타르를 각각 40× 40× 160㎜로 제작하여 20± 2℃의 온도, 60± 10%의 상대습도에서 28일간 양생한 이후에, 길이를 측정하여 길이 변화율을 산출하였다. Next, Figure 8 is a view showing the length change state of the lightweight hybrid maintenance mortar according to the present invention, by making the mortar 40 × 40 × 160 mm, respectively, at a temperature of 20 ± 2 ℃, relative humidity of 60 ± 10% After curing for 28 days, the length was measured to calculate the rate of change of length.

도 8에 나타난 바와 같이, 경량 모르타르의 길이변화율을 측정한 결과, 본 발명에 따른 경량 하이브리드 보수 모르타르의 길이 변화 시험에서는 모르타르가 CaO 및 CSA 팽창제에 의해 팽창하게 되어 KS F 규준인 ± 0.15%를 충분히 만족하는 + 0.05∼0.07% 로 나타나는 것을 볼 수 있는 바, 길이 변화가 비교적 크게 나타나는 A,B,C의 일반 모르타르보다 우수한 부착력과 길이 변화율이 작은 특성을 가지게 되므로, 기존 콘크리트와의 들뜸 현상을 방지하는 역할이 충분히 가능하게 된다. As shown in FIG. 8, as a result of measuring the length change rate of the light weight mortar, in the length change test of the light weight hybrid repair mortar according to the present invention, the mortar is expanded by CaO and CSA expanding agents to sufficiently satisfy the KS F standard ± 0.15%. It can be seen that it appears to be satisfied with + 0.05 ~ 0.07%, it has the characteristics that the adhesion and the rate of change of the length is smaller than the general mortar of A, B, C, which shows a relatively large change in length, thus preventing the lifting phenomenon with the existing concrete. The role to play becomes fully possible.

도 9는 본 발명에 따른 경량 하이브리드 보수 모르타르의 중성화 깊이를 나타낸 도면으로서, 모르타르의 중성화 깊이를 파악하기 위한 중성화 저항성 시험은 20± 2℃의 온도와, 65± 10%의 습도의 조건에서 5%의 이산화탄소(CO2)의 농도로 설정된 촉진 중성화 시험기에 모르타르를 넣은 후에, 14일이 경과된 후 꺼내어 단 면을 절단하고 절단면에 1%의 페놀프탈레인 용액을 분무하여 중성화 깊이를 측정하게 된다. 9 is a view showing the neutralization depth of the light-weight hybrid repair mortar according to the present invention, the neutralization resistance test for determining the neutralization depth of the mortar is 5% at a temperature of 20 ± 2 ℃, humidity of 65 ± 10% Mortar was added to the accelerated neutralization tester set to the concentration of carbon dioxide (CO 2), and after 14 days, the mortar was taken out, the cross section was cut, and a 1% phenolphthalein solution was sprayed on the cross section to measure the neutralization depth.

도 9에 나타난 바와 같이, 경량 모르타르의 촉진 중성화 실험에 의한 중성화 깊이를 측정한 결과, 본 발명에 따른 경량 하이브리드 보수 모르타르에서는 KS F 규준(2mm이하) 이하를 만족하는 값으로 1.0~1.5mm의 값을 나타내고 있다. As shown in FIG. 9, as a result of measuring the neutralization depth by the accelerated neutralization experiment of the light weight mortar, the light weight hybrid repair mortar according to the present invention satisfies the KS F standard (2 mm or less) or less and has a value of 1.0 to 1.5 mm. Indicates.

상기에서 본 발명의 특정한 실시예가 설명 및 도시되었지만, 본 발명이 당업자에 의해 다양하게 변형되어 실시될 가능성이 있는 것은 자명한 일이다. 이와 같은 변형된 실시예들은 본 발명의 기술적 사상이나 전망으로부터 개별적으로 이해되어져서는 안되며, 본 발명에 첨부된 청구범위 안에 속한다고 해야 할 것이다.While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

이상과 같이 본 발명에 따르면, 경량 하이브리드 보수 모르타르는 유/무기 재료의 단점을 보완하여 재료의 분리도를 저감함과 더불어, 모르타르에 팽창재 및 나일론 섬유를 적용함에 의해 기존 콘크리트와의 부착 강도 향상 및 휨강도의 향상을 도모할 수 있다는 효과를 갖게 된다. As described above, according to the present invention, the lightweight hybrid repair mortar compensates for the shortcomings of the organic / inorganic material and reduces the separation of the material, and also improves the bond strength and the bending strength of the existing concrete by applying the expansion material and the nylon fiber to the mortar. The effect can be improved.

또한, 경량골재를 사용하여 모르타르의 단위 중량을 낮게하여 구조물 주변에 상존하는 미세진동으로 인한 초기 및 장기적인 부착력의 저하로 인한 천정부 시공의 어려움이 극복되고, 차량통행을 전면 통제하여야 하는 교량 슬래브의 보수시 부분적 통제 또는 통제없이 보수 공사를 실시할 수 있는 효과를 갖게 된다. In addition, the lightweight aggregate is used to lower the unit weight of mortar, thereby overcoming the difficulties of ceiling construction due to the initial and long-term deterioration of adhesion force due to the microscopic vibrations remaining around the structure, and repairing the bridge slab that requires full control of vehicle traffic. The city will have the effect of repair work without partial control or control.

Claims (4)

상온, 대기압의 조건에서 30.0∼40.0%의 시멘트에, 5.0∼15.0%의 페라이트계 경량골재와, 5.0∼15.0%의 탄산칼슘(CaCo3) 분말, 0.2∼1.0%의 아크릴수지(Acrylic Resin), 1.0∼2.0%의 비닐수지(Vinyl resin), 0.2%의 CSA(Calcium Sulphoaluminate)계 팽창제, 1.0∼3.5%의 산화칼슘(CaO)계 팽창제, 1.0∼3.5%의 무수석고(Anhydrous Gypsum), 0.1∼0.5%의 나일론 섬유(Nylon Fiber), 0.1∼0.5%의 분산제(Dispersion Agent), 0.01∼0.02%의 분말 기포연행제(Air entraining agent), 30.0∼45.0%의 규사(Silica Sand)를 구성 성분으로 하는 중량 비율로 혼합하여 이루어진 것을 특징으로 하는 경량 하이브리드 보수 모르타르 조성물.Under conditions of normal temperature and atmospheric pressure, 30.0-40.0% cement, 5.0-15.0% ferrite lightweight aggregate, 5.0-15.0% calcium carbonate (CaCo 3 ) powder, 0.2-1.0% acrylic resin, 1.0-2.0% vinyl resin, 0.2% CSA (Calcium Sulphoaluminate) expander, 1.0-3.5% calcium oxide (CaO) -based expander, 1.0-3.5% Anhydrous Gypsum, 0.1- 0.5% Nylon Fiber, 0.1 ~ 0.5% Dispersion Agent, 0.01 ~ 0.02% Powder Entraining Agent, 30.0 ~ 45.0% Silica Sand Lightweight hybrid maintenance mortar composition characterized in that the mixture was made in a weight ratio to. 제 1 항에 있어서, The method of claim 1, 상기 시멘트와, 페라이트계 경량골재, 탄산칼슘 분말(CaCo3), 아크릴수지, 비닐수지, CSA계 팽창제, 산화칼슘(CaO); 무수석고, 나일론 섬유, 분산제, 분말 기포연행제, 규사를 중량 비율로 모르타르 믹서에 모두 넣고 건식 상태에서 믹싱하여 얻어지는 것을 특징으로 하는 경량 하이브리드 보수 모르타르 조성물.The cement, ferrite-based lightweight aggregate, calcium carbonate powder (CaCo3), acrylic resin, vinyl resin, CSA-based expanding agent, calcium oxide (CaO); A lightweight hybrid water-retaining mortar composition, which is obtained by mixing anhydrous gypsum, nylon fiber, dispersant, powder bubble entraining agent, and silica sand in a mortar mixer by weight ratio and mixing in a dry state. 제 1 항에 있어서, The method of claim 1, 상기 나일론 섬유는, 인장 강도가 800MPa 이상을 갖는 단섬유 형태로 모르타르 제조시 혼합하는 것을 특징으로 하는 경량 하이브리드 보수 모르타르 조성물.The nylon fiber is a lightweight hybrid water-retaining mortar composition, characterized in that mixed in the production of mortar in the form of short fibers having a tensile strength of 800MPa or more. 제 1 항에 있어서, The method of claim 1, 상기 분산제는, 나프탈렌 또는 멜라닌계의 고성능 감수제로 이루어진 것을 특징으로 하는 경량 하이브리드 보수 모르타르 조성물.The dispersing agent is a lightweight hybrid water-retaining mortar composition, characterized in that the naphthalene or melanin-based high-performance sensitizer.
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KR101051761B1 (en) * 2008-08-13 2011-07-25 매일종합건설(주) Methods of repair and reinforcement of concrete structures
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KR102111619B1 (en) * 2019-09-16 2020-05-15 효림이엔아이(주) Hybrid lightweight mortar composition And repair and reinforcement method Using the same
KR102143854B1 (en) * 2019-09-16 2020-08-12 효림이엔아이(주) Hybrid lightweight mortar composition

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