KR102164561B1 - Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same - Google Patents

Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same Download PDF

Info

Publication number
KR102164561B1
KR102164561B1 KR1020200003847A KR20200003847A KR102164561B1 KR 102164561 B1 KR102164561 B1 KR 102164561B1 KR 1020200003847 A KR1020200003847 A KR 1020200003847A KR 20200003847 A KR20200003847 A KR 20200003847A KR 102164561 B1 KR102164561 B1 KR 102164561B1
Authority
KR
South Korea
Prior art keywords
weight
mortar
concrete
delete delete
water
Prior art date
Application number
KR1020200003847A
Other languages
Korean (ko)
Inventor
공병하
Original Assignee
콘스타 주식회사
(주)리온이앤씨
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 콘스타 주식회사, (주)리온이앤씨 filed Critical 콘스타 주식회사
Priority to KR1020200003847A priority Critical patent/KR102164561B1/en
Application granted granted Critical
Publication of KR102164561B1 publication Critical patent/KR102164561B1/en

Links

Images

Classifications

    • 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
    • C04B18/04Waste materials; Refuse
    • C04B18/14Waste materials; Refuse from metallurgical processes
    • C04B18/141Slags
    • 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
    • C04B14/04Silica-rich materials; Silicates
    • C04B14/06Quartz; Sand
    • 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
    • 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
    • C04B18/04Waste materials; Refuse
    • C04B18/06Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08Flue dust, i.e. fly ash
    • 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
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/0076Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
    • C04B20/0096Fillers with bimodal grain size distribution
    • 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
    • C04B22/06Oxides, Hydroxides
    • C04B22/062Oxides, Hydroxides of the alkali or alkaline-earth metals
    • C04B22/064Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
    • 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
    • C04B22/08Acids or salts thereof
    • C04B22/085Acids or salts thereof containing nitrogen in the anion, e.g. nitrites
    • 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
    • C04B22/08Acids or salts thereof
    • C04B22/12Acids or salts thereof containing halogen in the anion
    • 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
    • C04B24/02Alcohols; Phenols; Ethers
    • 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
    • C04B24/12Nitrogen containing compounds organic derivatives of hydrazine
    • 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
    • C04B24/26Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • C04B24/38Polysaccharides or derivatives thereof
    • 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
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B17/00Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/0034Maintenance, repair or inspection of offshore constructions
    • 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
    • C04B2103/34Flow improvers
    • 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
    • C04B2103/56Opacifiers
    • C04B2103/58Shrinkage reducing agents
    • 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
    • C04B2111/74Underwater applications
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to a cement composition used for repairing and reinforcing damaged or deteriorated underwater concrete structures, underwater hardening mortar, and a method for repairing concrete structures using the same. The present invention allows a cured structure to be formed in water. Mortar for repairing concrete includes 35 to 50 wt% of a cement composition, 0.2 to 1.4 wt% of admixture, and 0.4 to 0.8 wt% of a fluidizing agent.

Description

시멘트 조성물 및 수중 불분리 콘크리트 보수용 몰탈 및 이를 이용한 콘크리트 구조물의 보수방법{Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same}Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same}

본 발명은 손상되거나 열화된 수중 콘크리트 구조물의 보수보강을 위해 사용되는 시멘트 조성물 및 수중 불분리 콘크리트 보수용 몰탈 그리고 이를 이용한 콘크리트 구조물의 보수방법에 관한 것이다.The present invention relates to a cement composition used for repair and reinforcement of damaged or deteriorated underwater concrete structures, a mortar for repairing non-separated concrete in water, and a repair method of a concrete structure using the same.

일반적으로 시멘트 몰탈은 지상 또는 지하에 타설하는 것이 보편적이다. 하지만 교량의 교각 및 해안구조물에서는 물속에서 몰탈을 타설하는 경우가 있다.In general, it is common to place cement mortar above or below ground. However, in bridge piers and coastal structures, mortar may be poured in water.

시멘트는 주로 삼중규산염(C3S)과 디칼슘 규산염(C2S)의 2개의 미네랄로 구성되어 있다. 시멘트 수화 시, 주요 반응 물질은 칼슘실리케이트 수화물 젤(C-S-H), 수산화칼슘(Ca(OH)2) 또는 C·H 이다. (C=CaO, S=SiO2, H=H2O) 콘크리트의 황산염 침투는 콘크리트 바닥 슬래브에서 주로 발생한다. 슬래브 공사를 할 때 황산염이 함유될 수 있고 콘크리트 바닥 슬래브를 형성할 때 오부에서 콘크리트로 침투하기도 한다. 황산염의 침투 황산마그네시아 염 및 항산나트륨 염 그리고 SO3-이온을 포함하는 염에서 기인한다. 용해질에 존재하는 SO4와 Ca2+ 이온의 상호 작용은 CaSO4 또는 gypsum(석고)을 생성한다. 삼중 칼슘 알루미네이트와 같은 시멘트에 존재하는 다른 성분도 황산이온과 상호 작용한다. 황산이온의 농도가 감소하면 에트링자이트(Ettringite)가 모노설페이트(monosulfates)로 분해된다.Cement is mainly composed of two minerals: trisilicate (C 3 S) and dicalcium silicate (C 2 S). In cement hydration, the main reactants are calcium silicate hydrate gel (CSH), calcium hydroxide (Ca(OH) 2 ) or C·H. (C=CaO, S=SiO 2 , H=H 2 O) Sulfate penetration of concrete occurs mainly in concrete floor slabs. During slab construction, sulphate may be contained, and when forming concrete floor slab, it may penetrate into concrete from the wrong part. Penetration of sulfates is caused by magnesium sulfate and sodium antioxidant salts and salts containing SO 3- ions. The interaction of SO 4 and Ca 2+ ions present in the solubilize produces CaSO 4 or gypsum (gypsum). Other components present in cement, such as triple calcium aluminate, also interact with sulfate ions. When the concentration of sulfate ion decreases, ethringite is decomposed into monosulfates.

Figure 112020003156045-pat00001
H+CH→C·S·H2
Figure 112020003156045-pat00001
H+CH→C·S·H2

C3A + 3C·

Figure 112020003156045-pat00002
·H2 + 26H→C3A·3C·
Figure 112020003156045-pat00003
·H32 C 3 A + 3C
Figure 112020003156045-pat00002
·H2 + 26H→C3A·3C·
Figure 112020003156045-pat00003
・H32

tricalcium aluminate + gypsum → Ettringite tricalcium aluminate + gypsum → Ettringite

2C3A + C3A·3C·

Figure 112020003156045-pat00004
·H32 → 3C3A·3C·
Figure 112020003156045-pat00005
·H12 2C 3 A + C 3 A·3C·
Figure 112020003156045-pat00004
H 32 → 3C 3 A 3C
Figure 112020003156045-pat00005
·H 12

(A = Al2O3,

Figure 112020003156045-pat00006
= CaSO4, C=CaO, S=SiO2, H=H2O) (A = Al 2 O 3,
Figure 112020003156045-pat00006
= CaSO4, C=CaO, S=SiO 2 , H=H 2 O)

황산염의 영향을 최소화하기 위해 기존에는 수중에서 손상되거나 열화된 콘크리트를 보수 보강하기 위해, 보강 위치의 고인 물을 완전히 제거하고 외부의 물의 유입을 차단한 상태로 새로운 몰탈이나 콘크리트로 보수하였다. 보수 후 차단했던 물을 개방하면 물에 의해 시멘트 등 미세 입자가 분산되어 콘크리트나 몰탈의 물성, 특히 강도가 저하되고, 더 나아가 콘크리트나 몰탈의 기능이 손실되기도 하는 추가적인 문제가 있었다. 이와 같은 물에 의한 콘크리트의 열화, 특히 지하수에 포함된 황산염의 침투에 의한 콘크리트 열화는 황산염 저항성이 우수한 재료를 사용하여 어느 정도 보완할 수 있어 그 재료에 대한 연구가 지속되고 있다. In order to minimize the effect of sulfate, in order to repair and reinforce damaged or deteriorated concrete in the water, the water at the reinforcement site was completely removed and the inflow of water from outside was blocked, and it was repaired with new mortar or concrete. When the water that was blocked after repair is opened, fine particles such as cement are dispersed by the water, and the physical properties of concrete or mortar, especially strength, are deteriorated, and furthermore, there is an additional problem that the function of concrete or mortar is lost. The deterioration of concrete due to water, especially the deterioration of concrete due to the penetration of sulfate contained in groundwater, can be compensated to some extent by using a material having excellent sulfate resistance, and research on the material is continuing.

본 발명의 목적은 시공 부위에 물을 제거하지 않고 타설 하여도, 몰탈 재료가 물속에서 분산되지 않고 수중에서도 경화 구조체를 형성시킬 수 있는 수 있는 시멘트 조성물 및 이를 포함하는 수중 불분리 몰탈을 제공함에 있다.It is an object of the present invention to provide a cement composition capable of forming a hardened structure even in water without dispersing the mortar material even if it is poured into a construction site without removing water, and an underwater non-separated mortar comprising the same. .

또한 본 발명의 다른 목적은 수중콘크리트 구조물의 열화 손상 부위에 황산염의 침투에 강하고 황산염과 반응하는 성분을 가지고 있지 않은 수중 불분리 몰탈과 지오그리드를 이용하여 콘크리트 구조물의 수중 보수방법을 제공함에 있다.In addition, another object of the present invention is to provide a method for repairing a concrete structure underwater by using an underwater non-separated mortar and geogrid that is resistant to the penetration of sulfate into the deterioration damaged site of the underwater concrete structure and does not have a component that reacts with the sulfate.

본 발명의 일 실시예는 고로 슬래그 분말 20 내지 60중량%; 플라이 애시 20 내지 60 중량%; 1종 시멘트 5 내지 10중량%; 산화칼슘 4 내지 15중량%; 및 지르코닐 클로라이드 또는 지르코닐 나이트레이트 하이드레이트 중 어느 하나를 0.3 내지 2중량% 포함하는 것을 특징으로 하는 시멘트 조성물을 제공한다. 바람직하게는 상기 플라이 애시의 비표면적이 6000cm2 내지 8000cm2일 수 있다.An embodiment of the present invention is a blast furnace slag powder 20 to 60% by weight; 20 to 60 weight percent fly ash; 5 to 10% by weight of type 1 cement; 4-15% by weight of calcium oxide; And it provides a cement composition comprising 0.3 to 2% by weight of any one of zirconyl chloride or zirconyl nitrate hydrate. Preferably, the specific surface area of the fly ash may be 6000cm 2 to 8000cm 2 .

바람직하게는 상기 산화칼슘의 비표면적은 3000cm2/g 내지 5000cm2/g일 수 있다.Preferably, the specific surface area of the calcium oxide may be 3000cm 2 /g to 5000cm 2 /g.

본 발명의 다른 일 실시예는 본 발명의 일 실시예에 따른 시멘트 조성물 35 내지 50중량%; 혼화제 0.2 내지 1.4 중량%; 및 유동화제 0.4 내지 0.8중량% 포함하는 것을 특징으로 하는 수중 불분리 콘크리트 보수용 몰탈을 제공한다.Another embodiment of the present invention is 35 to 50% by weight of a cement composition according to an embodiment of the present invention; 0.2 to 1.4% by weight of admixture; And it provides a mortar for repairing non-separated concrete in water containing 0.4 to 0.8% by weight of a fluidizing agent.

바람직하게는 상기 혼화제는 폴리에틸렌옥사이드, 폴리에틸렌옥사이드와 하이드록시프로필렌 메틸 셀룰로즈를 3:1로 혼합한 혼화제, 카라기난 및 액상의 파라핀와스 에멀젼과 헥실렌 글리콜을 7:3으로 혼합한 혼화제 중 선택된 어느 하나일 수 있다.Preferably, the admixture is any one selected from polyethylene oxide, an admixture in which polyethylene oxide and hydroxypropylene methyl cellulose are mixed at 3:1, carrageenan and a liquid paraffinwas emulsion and an admixture mixed with hexylene glycol at 7:3. I can.

바람직하게는 상기 유동화제는 설포네이티드 멜라민 포름알데히드(sulfonated melamine formaldehyde)인 것일 수 있다.Preferably, the fluidizing agent may be sulfonated melamine formaldehyde.

상기 몰탈은 규사 45 내지 60 중량%를 더 포함하는 것일 수 있다.The mortar may further include 45 to 60% by weight of silica sand.

바람직하게는 상기 규사는 굵기가 0.85 내지 1.22mm의 규사와 0.6 내지 0.85mm의 규사를 1:1로 배합하여 사용하는 것일 수 있다.Preferably, the silica sand may be used by mixing a silica sand having a thickness of 0.85 to 1.22 mm and a silica sand having a thickness of 0.6 to 0.85 mm in a ratio of 1:1.

상기 몰탈은 보강섬유 0.1 내지 0.5중량%를 더 포함하는 것일 수 있다.The mortar may further contain 0.1 to 0.5% by weight of reinforcing fibers.

바람직하게는 상기 보강섬유는 표면에 하이드록시기를 포함하는 것일 수 있다.Preferably, the reinforcing fiber may include a hydroxyl group on the surface.

상기 몰탈은 수축 저감제 2 내지 5중량%를 더 포함하는 것일 수 있다.The mortar may further include 2 to 5% by weight of a shrinkage reducing agent.

바람직하게는 상기 수축 저감제는 네오펜틸 글리콜(Neopentyhyl glycol)인 것일 수 있다.Preferably, the shrinkage reducing agent may be Neopentyhyl glycol.

본 발명의 또 다른 일 실시예는 콘크리트의 파손 또는 열화된 부위를 절단하는 단계; 상기 절단 부위에 고압의 기체를 분사하여 세척하는 단계; 상기 세척한 절단 부위에 청구항 4항의 몰탈을 1차 타설하여 충진하는 단계를 포함하는 것을 특징으로 하는 콘크리트 수중 보수방법을 제공한다.Another embodiment of the present invention comprises the steps of cutting the damaged or deteriorated part of concrete; Washing by injecting a high-pressure gas to the cutting area; It provides a concrete underwater repair method comprising the step of first pouring and filling the mortar of claim 4 in the washed cut portion.

바람직하게는 상기 몰탈이 충진된 절단 부위의 상부에 지오그리드를 설치하는 단계; 및 상기 지오그리드의 상부에 청구항 4항의 몰탈 보강층을 만드는 단계를 더 포함하는 것일 수 있다.Preferably, the step of installing a geogrid on the top of the cut portion filled with the mortar; And making the mortar reinforcement layer of claim 4 on the top of the geogrid.

본 발명의 시멘트 몰탈 조성물은 시공 부위에 물을 제거하지 않고 타설 하여도, 몰탈 재료가 물속에서 분산되지 않고 수중에서도 경화 구조체를 형성시킬 수 있는 효과가 있다. The cement mortar composition of the present invention has the effect of being able to form a cured structure even in water without dispersing the mortar material even if it is poured into the construction site without removing water.

또한 본 발명의 시멘트 몰탈 조성물은 물에 존재하는 황산염의 침투에 강하고 황산염과 반응하는 성분을 가지고 있지 않아 수중에서 별도로 물을 제거하는 공정을 추가하지 않고 콘크리트 구조물을 보수할 수 있다.In addition, since the cement mortar composition of the present invention is resistant to penetration of sulfates present in water and does not have a component that reacts with sulfates, a concrete structure can be repaired without adding a separate process of removing water from water.

도 1은 몰탈을 이용한 Anti washout 시험의 모식도이다
도 2는 몰탈의 흐름성 시험에 이용하는 기구의 모식도이다.
도 3은 압축 강도 시험 결과로 일반 지오폴리머 보수 몰탈과 실시예에 따른 수중불분리 지오폴리머 보수몰탈에 대하여 대기 중과 수중의 압축강도를 비교한 그래프이다.
도 4는 본 발명의 일 실시예에서 사용도는 지오그리드를 표현한 도면이다.
도 5는 볼 발명의 일 실시예의 몰탈 및 지오그리드를 이용한 콘크리트 보수공법을 적용한 것을 나타낸 모식도이다.
도 6은 수축 저감제를 사용하지 않은 경우(좌)와 수축 저감제를 사용한 경우(우)의 차이를 나타낸 사진이다.
1 is a schematic diagram of an Anti washout test using mortar
Fig. 2 is a schematic diagram of a mechanism used in a mortar flow test.
3 is a graph comparing the compressive strength in air and in water for a general geopolymer repair mortar and an underwater non-separated geopolymer repair mortar according to Examples as a result of a compressive strength test.
4 is a diagram illustrating a geogrid used in an embodiment of the present invention.
Figure 5 is a schematic diagram showing the application of the concrete repair method using a mortar and geogrid of an embodiment of the ball invention.
6 is a photograph showing the difference between the case where the shrinkage reducing agent is not used (left) and the shrinkage reducing agent is used (right).

이하, 본 발명의 이해를 돕기 위해 더욱 상세히 설명한다. Hereinafter, it will be described in more detail to aid the understanding of the present invention.

본 발명의 일 실시예는 고로 슬래그 분말 20 내지 60중량%; 플라이 애시 20 내지 60 중량%; 1종 시멘트 5 내지 10중량%; 산화칼슘 4 내지 15중량%; 및 지르코닐 클로라이드 또는 지르코닐 나이트레이트 하이드레이트 중 어느 하나를 0.3 내지 2중량% 포함하는 것을 특징으로 하는 시멘트 조성물을 제공한다.An embodiment of the present invention is a blast furnace slag powder 20 to 60% by weight; 20 to 60 weight percent fly ash; 5 to 10% by weight of type 1 cement; 4-15% by weight of calcium oxide; And it provides a cement composition comprising 0.3 to 2% by weight of any one of zirconyl chloride or zirconyl nitrate hydrate.

고로 슬래그의 사용은 세 가지 방법으로 황산염 공격의 가능성을 감소시킨다. 고로 슬래그는 C3A를 포함하지 않으므로 몰탈에 사용하면 황산염이 침투하더라도 황산염과 반응하는 C3A 총량이 희석되어 몰탈을 재 열화시키는 에트링자이트(Ettringite)를 형성하지 않는다. 또한 몰탈의 투과성을 감소시켜 황산염이 몰탈로 침투하기 어렵게 만든다. 마지막으로 고로 슬래그는 여분의 Ca(OH)2와 반응하여 추가적인 칼슘 실리 케이트 수화물 젤을 제공하여 콘크리트의 강도를 향상시키고 콘크리트를 형성하게 하는 접착제를 형성하여 시스템에서 Ca(OH)2의 총량이 줄어들게 한다.The use of blast furnace slag reduces the likelihood of sulphate attack in three ways. Since blast furnace slag does not contain C 3 A, if it is used for mortar, even if sulfate penetrates, the total amount of C 3 A reacting with the sulfate is diluted and does not form Ettringite, which deteriorates the mortar again. It also reduces the permeability of the mortar, making it difficult for sulfates to penetrate into the mortar. Finally, the blast furnace slag reacts with the excess Ca(OH) 2 to provide additional calcium silicate hydrate gel, which improves the strength of the concrete and forms an adhesive that forms the concrete, reducing the total amount of Ca(OH) 2 in the system. do.

상기 고로 슬래그가 20중량% 미만이면 초기강도가 저하되며, 60량% 초과하면 미경화 몰탈의 위 응결로 인한 유동성 감소로 시공성이 저하된다. If the blast furnace slag is less than 20% by weight, the initial strength decreases, and if it exceeds 60% by weight, the workability decreases due to a decrease in fluidity due to gastric condensation of the uncured mortar.

상기 플라이 애시는 고로슬래그와 함께 1종 시멘트의 사용량을 최소화 하기 위해 사용된다. 플라이 애시는 20중량% 미만 사용 시 유동성이 저하되며, 60중량% 초과하면 초기강도가 저하된다. The fly ash is used together with blast furnace slag to minimize the use of type 1 cement. When the fly ash is used in less than 20% by weight, the fluidity decreases, and when it exceeds 60% by weight, the initial strength decreases.

또한 상기 플라이 애시의 비표면적은 바람직하게는 6000cm2 내지 8000cm2일 수 있다. 플라이 애시의 비표면적이 6000cm2/g이하 이면 초기강도가 약하며, 8000cm2/g이면 물-결합재비가 높아서 강도가 저하된다. In addition, the specific surface area of the fly ash may be preferably 6000cm 2 to 8000cm 2 . The specific surface area of the fly ash is 6000cm 2 / g or less, the initial strength weak, 8000cm 2 / g When the water-binder ratio is high and the strength is lowered.

상기 1종 시멘트는 알루미노 실리케이트 재료인 고로 슬래그와 플라이 애시의 반응을 촉진하기 위해 사용되며 5중량% 미만일 경우 응결 및 경화 속도가 느리게 되며 10중량%를 초과하면 응결 경화 속도는 증가하지만 황산염 침투 저항성이 저하된다.The first type cement is used to accelerate the reaction between blast furnace slag, which is an alumino silicate material, and fly ash.If it is less than 5% by weight, the setting and hardening rate is slow.If it exceeds 10% by weight, the setting and hardening rate increases, but resistance to sulphate penetration This is degraded.

상기 산화칼슘은 4∼15중량%를 사용한다. 산화칼슘은 미경화 모르타르가 저온 시공(대기온도 5~10 ℃)될 경우 물에 녹으면서 발생하는 발열로 고로 슬래그와 플라이 애시가 활성화제와 원활한 반응을 하도록 온도환경을 조성하며, 경화 모르타르 내부에서는 산화칼슘이 물과 반응하여 발생한 수산화칼슘에 의한 경화 모르타르 내부 pH를 12 이상 유지하여 철근의 부동태를 형성하는 역할을 한다. 산화 칼슘의 사용량이 4중량% 미만일 경우 저온에서 경화속도가 느려지며 15중량%를 초과할 경우 경화 속도가 빨라 작업성이 저하된다.The calcium oxide is used in an amount of 4 to 15% by weight. Calcium oxide creates a temperature environment so that the blast furnace slag and fly ash react smoothly with the activator by heating generated by dissolving in water when the uncured mortar is applied at a low temperature (at ambient temperature of 5 to 10 ℃). It plays a role of forming passivation of reinforcing bars by maintaining a pH of 12 or higher inside the hardened mortar by calcium hydroxide generated by reaction of calcium oxide with water. When the amount of calcium oxide used is less than 4% by weight, the curing rate is slowed at low temperatures, and when it exceeds 15% by weight, the curing rate is fast and workability decreases.

바람직하게는 상기 산화칼슘의 비표면적은 3000cm2/g 내지 5000cm2/g일 수 있다. Preferably, the specific surface area of the calcium oxide is 3000cm 2 /g To It may be 5000cm 2 /g.

본 발명의 다른 일 실시 예는 본 발명의 일 실시 예에 따른 시멘트 조성물 35 내지 50중량%; 혼화제 0.2 내지 1.4 중량%; 및 유동화제 0.4 내지 0.8중량% 포함하는 것을 특징으로 하는 수중 불분리 콘크리트 보수용 몰탈을 제공한다.Another embodiment of the present invention is 35 to 50% by weight of a cement composition according to an embodiment of the present invention; 0.2 to 1.4% by weight of admixture; And it provides a mortar for repairing non-separated concrete in water containing 0.4 to 0.8% by weight of a fluidizing agent.

상기 혼화제는 몰탈을 구성하는 입자가 물이 존재하는 부위에 시공할 때 물에 의해 분산되지 않도록 고점도를 가진 것을 사용한다. As the admixture, a material having a high viscosity is used so that the particles constituting the mortar are not dispersed by water when applied to the area where water is present.

바람직하게는 상기 혼화제는 폴리에틸렌옥사이드, 폴리에틸렌옥사이드와 하이드록시프로필렌 메틸 셀룰로즈를 3:1로 혼합한 혼화제, 카라기난 및 액상의 파라핀와스 에멀젼과 헥실렌 글리콜을 7:3으로 혼합한 혼화제 중 선택된 어느 하나일 수 있다.Preferably, the admixture is any one selected from polyethylene oxide, an admixture in which polyethylene oxide and hydroxypropylene methyl cellulose are mixed at 3:1, carrageenan and a liquid paraffinwas emulsion and an admixture mixed with hexylene glycol at 7:3. I can.

상기 유동화제는 고점도의 혼화제로 인해 저하되는 작업성을 보상하기 위해 첨가한다. 유동화제가 0.4중량% 미만일 경우 혼화제로 인한 점도 상승으로 인해 작업성이 저하되며 0.8중량%를 초과하면 몰탈의 유동성이 과도하게 증가하여 작업이 어렵게 된다. The fluidizing agent is added to compensate for the workability deteriorated due to the high viscosity admixture. When the fluidizing agent is less than 0.4% by weight, the workability is deteriorated due to the increase in viscosity due to the admixture, and when it exceeds 0.8% by weight, the fluidity of the mortar is excessively increased, making the operation difficult.

바람직하게는 상기 유동화제는 설포네이티드 멜라민 포름알데히드(sulfonated melamine formaldehyde)일 수 있다. 대부분의 콘크리트나 몰탈에서는 Sulfonate naphatalen formaldehyde를 많이 사용하고, 이것을 사용할 경우 폴리에틸렌 옥사이드와 바로 반응하여 수중 불분리 효과가 없어지고 골재와 시멘트 입자가 서로 분리되지만, 설포네이티드 멜라민 포름알데히드를 사용 시 수중 불분리 효과를 유지하며 골재와 시멘트 입자가 서로 분리되지 않는 효과가 있다.Preferably, the fluidizing agent may be sulfonated melamine formaldehyde. In most concretes and mortars, sulfonate naphatalen formaldehyde is used a lot, and when it is used, it reacts directly with polyethylene oxide, so that the non-separating effect in water disappears and the aggregate and cement particles are separated from each other. It maintains the separation effect and has the effect of not separating aggregate and cement particles from each other.

상기 몰탈은 규사 45 내지 60 중량%를 더 포함하는 것일 수 있다. 바람직하게는 상기 규사는 굵기가 0.85 내지 1.22mm의 규사와 0.6 내지 0.85mm의 규사를 1:1로 배합하여 사용하는 것일 수 있다. The mortar may further include 45 to 60% by weight of silica sand. Preferably, the silica sand may be used by mixing a silica sand having a thickness of 0.85 to 1.22 mm and a silica sand having a thickness of 0.6 to 0.85 mm in a ratio of 1:1.

상기 몰탈은 보강섬유 0.1 내지 0.5중량%를 더 포함하는 것일 수 있다. 상기 보강섬유는 소성수축, 건조수축에 의한 균열 발생 저항을 하기 위해 첨가하는 것이다. 바람직하게는 상기 보강섬유는 표면에 하이드록시기를 포함하는 것일 수 있다. 0.1중량% 미만이면 균열 감소 효과가 미진하고, 0.5중량%를 초과할 경우 제품 생산이 불가하다. 하이드록시기를 포함하지 않을 경우 몰탈을 물과 혼련 시 섬유의 분산효과가 저하된다.The mortar may further contain 0.1 to 0.5% by weight of reinforcing fibers. The reinforcing fibers are added to resist the occurrence of cracks due to plastic shrinkage and dry shrinkage. Preferably, the reinforcing fiber may include a hydroxyl group on the surface. If it is less than 0.1% by weight, the crack reduction effect is insignificant, and if it exceeds 0.5% by weight, product production is impossible. If the hydroxy group is not included, the dispersion effect of the fibers is reduced when the mortar is kneaded with water.

상기 몰탈은 수축 저감제 2 내지 5중량%를 더 포함하는 것일 수 있다. 수축저감제는 고로 슬래그와 플라이애시의 미분말 주변의 물의 표면 장력을 감소시켜 증발로 인해 발생하는 공극의 수축을 저감시켜 몰탈이 양생 후 경화될 때 균열을 감소시킨다. 수축 저감제 사용량이 2중량% 미만일 경우 몰탈의 수축 감소 효과가 미비하며 5중량% 초과 시 생산단가가 증가된다. 바람직하게는 상기 수축 저감제는 네오펜틸 글리콜(Neopentyhyl glycol)일 수 있다. The mortar may further include 2 to 5% by weight of a shrinkage reducing agent. The shrinkage reducing agent reduces the surface tension of water around the fine powder of blast furnace slag and fly ash to reduce the shrinkage of voids caused by evaporation, thereby reducing cracking when the mortar is cured and hardened. If the amount of the shrinkage reducing agent used is less than 2% by weight, the effect of reducing the shrinkage of the mortar is insufficient, and if it exceeds 5% by weight, the production cost increases. Preferably, the shrinkage reducing agent may be Neopentyhyl glycol.

본 발명의 또 다른 일 실시예는 콘크리트의 파손 또는 열화된 부위를 절단하는 단계; 상기 절단 부위에 고압의 기체를 분사하여 세척하는 단계; 상기 세척한 절단 부위에 청구항 4항의 몰탈을 1차 타설하여 충진하는 단계를 포함하는 것을 특징으로 하는 콘크리트 수중 보수방법을 제공한다.Another embodiment of the present invention comprises the steps of cutting the damaged or deteriorated part of concrete; Washing by injecting a high-pressure gas to the cutting area; It provides a concrete underwater repair method comprising the step of first pouring and filling the mortar of claim 4 in the washed cut portion.

바람직하게는 상기 몰탈이 충진된 절단 부위의 상부에 지오그리드를 설치하는 단계; 및 상기 지오그리드의 상부에 청구항 4항의 몰탈 보강층을 만드는 단계를 더 포함하는 것일 수 있다.Preferably, the step of installing a geogrid on the top of the cut portion filled with the mortar; And making the mortar reinforcement layer of claim 4 on the top of the geogrid.

이하 실시예를 통해 상세히 설명한다. 다만 실시예는 본 발명의 이해를 돕기 위한 예시일 뿐 어떠한 방법으로도 본 발명을 제한하지 않는다.It will be described in detail through the following examples. However, the examples are only examples to aid understanding of the present invention and do not limit the present invention in any way.

실험예 1 - 압축강도실험Experimental Example 1-Compressive strength test

1) 압축 강도 시험체 성형용 몰드는 KS F 2476의 7.1.1에 규정한 40x40x160mm를 사용하였다.1) The mold for forming the compressive strength test specimen was 40x40x160mm specified in 7.1.1 of KS F 2476.

2) 상기 실험 시편 준비 방법에서 준비된 시료를 성형용 몰드에 1/2 정도 붓고 KS F2476의 7.1.1에 규정된 다짐봉으로 다진 후 다시 나머지 부분을 시료로 채운 뒤 다짐봉으로 다시 다져 시료가 충분히 채워지도록 하였다.2) Pour 1/2 of the sample prepared in the above test specimen preparation method into a molding mold, chop it with a compaction rod specified in 7.1.1 of KS F2476, fill the rest of the sample with the sample, and then compact the sample with a compaction rod. Let it be filled.

3) 성형용 몰드에 채워진 시편을 24시간 대기 중 보관후 탈형하여 온도 20±3℃의 수조에 넣어 양생하였다.3) The specimen filled in the molding mold was stored in the air for 24 hours, then demolded and cured in a water bath at a temperature of 20±3℃.

4) KS B5533에 규정된 압축 강도 시험기를 이용하여 압축 강도를 측정하였다.4) Compressive strength was measured using a compressive strength tester specified in KS B5533.

실험예 2 - 유동성Experimental Example 2-Flowability

1) 유동성 시험은 KS L 5111에 규정한 시멘트 시험용 플로 테이블를 사용하였다.1) For the flowability test, the flow table for cement testing specified in KS L 5111 was used.

2) 상기 실험 시편 준비 방법에서 준비된 시료를 즉시 콘 모양의 몰드( 하단 100±0.5mm, 상단 70±0.5mm, 높이 50±0.5mm)에 1/2 정도 붓고 KS F2476의 6.1.1에 규정된 다짐봉으로 다진 후 다시 나머지 부분을 시료로 채운 뒤 다짐봉으로 다시 다져 시료가 충분히 채워지도록 하였다.2) Immediately pour 1/2 of the sample prepared in the above test specimen preparation method into a cone-shaped mold (bottom 100±0.5mm, top 70±0.5mm, height 50±0.5mm), and the specified in 6.1.1 of KS F2476. After chopping with a compaction rod, the remaining part was filled with the sample and then compacted again with a compaction rod so that the sample was sufficiently filled.

3) 성형용 몰드에 채워진 후 몰드를 수직으로 들어 올린 후 플로 테이블의 탭을 5회 낙차 시켜 시편이 펼쳐지게 한다.3) After filling the mold for molding, lift the mold vertically and drop the tab of the flow table 5 times to unfold the specimen.

4) 펼쳐진 시편의 직경을 눈금자를 이용하여 직경을 구한다.4) Calculate the diameter of the unfolded specimen using a ruler.

실험예 3 - 응결속도Experimental Example 3-Setting speed

1) 응결 속도 시험은 KS L 5108에 규정한 비카트침에 의한 수경성 시멘트의 응결 시간 시험 방법에 따라 실시하였다.1) The setting speed test was carried out according to the setting time test method of hydraulic cement by vicat needle specified in KS L 5108.

2) 상기 실험 시편 준비 방법에서 준비된 시료를 원형 링 모양의 몰드( 하단 70mm, 상단 60mm, 높이 40mm)에 완전히 채운다.2) Completely fill the sample prepared in the test specimen preparation method into a circular ring-shaped mold (lower 70mm, upper 60mm, height 40mm).

3) 몰드에 체워진 시편은 습기함에 넣고 30분 이후 비카트 침을 이용하여 측정한다. 초기 30분 이후에는 15분 단위로 시편을 습기함에서 꺼내 동일한 방법으로 측정한다.3) Put the specimen filled in the mold in a damp box and measure it with a Vicat needle after 30 minutes. After the initial 30 minutes, take the specimen out of the moisture chamber every 15 minutes and measure it in the same way.

4) 시험 방법은 비카트 침 로드를 시험편 상단에 위치하고 조임 나사로 고정시킨 후 나사를 풀어 300g의 가동봉의 침투 깊이로 측정한다.4) Test method is to measure the penetration depth of the moving rod of 300g by loosening the screw after placing the Vicat needle rod on the top of the test piece and fixing it with a tightening screw.

5) 비카트 침의 침투 깊이가 20mm 되는 시간을 응결 시간으로하여 측정하였다.5) The time when the penetration depth of the Vicat needle became 20 mm was measured as the setting time.

실시예 1 내지 25Examples 1 to 25

실험에 사용되는 시편은 KS L5109 수경성 시멘트 페이스트 및 모르타르의 기계적 혼합 방법에 명시된 시험 방법에 따라 실시하였다. 3kg의 시료를 채취하여 KS L5109의 기계 반죽용 혼합기에 넣고 2분간 혼합 후 중단하여 계량된 물을 넣고 다시 1분간 혼합하였다. 혼합 중간에 30초간 3번에 걸쳐 혼합 용기 주변에 묻은 시료를 주걱으로 밀어 넣었다. 시편 준비 실험실의 온도 20~27.5℃ 로 유지하였으며 상대 습도 50% 이상을 유지하였다.The specimens used in the experiment were carried out according to the test method specified in KS L5109 Hydraulic Cement Paste and Mortar Mechanical Mixing Method. A 3kg sample was collected, put into a mechanical kneading mixer of KS L5109, mixed for 2 minutes, stopped, added water and mixed again for 1 minute. During the mixing, the sample on the periphery of the mixing container was pushed in with a spatula over 3 times for 30 seconds. The specimen preparation laboratory was maintained at a temperature of 20 to 27.5°C and a relative humidity of 50% or more.

하기 표 1 및 표 2에 각각 실시예 1 내지 25의 배합비 및 실험예 1 내지 실험예 3에 대한 실험결과를 표시하였다.Tables 1 and 2 below show the mixing ratios of Examples 1 to 25 and the experimental results for Experimental Examples 1 to 3, respectively.

Figure 112020003156045-pat00007
Figure 112020003156045-pat00007

실험 결과 슬래그의 사용량은 20~60중량%, 플라이 애시 20~60중량%, 1종 시멘트 사용량은 5~10중량% 사용하는 경우에만 압축강도, 유동성, 응결속도의 기준을 모두 만족하는 몰탈을 제조할 수 있음을 확인하였다.As a result of the experiment, a mortar that satisfies all the criteria of compressive strength, fluidity, and setting speed is manufactured only when the amount of slag is 20 to 60% by weight, fly ash is 20 to 60% by weight, and class 1 cement is 5 to 10% by weight. It was confirmed that it can be done.

Figure 112020003156045-pat00008
Figure 112020003156045-pat00008

실험 결과 산화칼슘은 4~15중량%, 활성화제는 0.3~2.0중량% 혼합하여 사용하는 경우에만 압축강도, 유동성 및 응결속도의 기준을 모두 만족하는 것을 확인하였다.As a result of the experiment, it was confirmed that the criteria of compressive strength, fluidity, and setting speed were all satisfied only when the calcium oxide was mixed with 4 to 15 wt% and the activator was mixed at 0.3 to 2.0 wt%.

Claims (14)

시멘트 조성물 35 내지 50중량%;
혼화제 0.2 내지 1.4 중량%;
및 유동화제 0.4 내지 0.8중량%를 포함하는 수중 불분리 콘크리트 보수용 몰탈로서,
상기 시멘트 조성물은 고로 슬래그 분말 20 내지 60중량%; 플라이 애시 20 내지 60 중량%; 1종 시멘트 5 내지 10중량%; 산화칼슘 4 내지 15중량%; 및 지르코닐 클로라이드 또는 지르코닐 나이트레이트 하이드레이트 중 어느 하나를 0.3 내지 2중량% 포함하고,
상기 혼화제는 폴리에틸렌옥사이드와 하이드록시프로필렌 메틸 셀룰로즈를 3:1로 혼합한 혼화제, 카라기난 및 액상의 파라핀왁스 에멀젼과 헥실렌 글리콜을 7:3으로 혼합한 혼화제 중 선택된 어느 하나이며,
상기 유동화제는 설포네이티드 멜라민 포름알데히드(sulfonated melamine formaldehyde)인 것을 특징으로 하는 수중 불분리 콘크리트 보수용 몰탈.
35 to 50% by weight of a cement composition;
0.2 to 1.4% by weight of admixture;
And as a mortar for repairing non-separated concrete in water containing 0.4 to 0.8% by weight of a fluidizing agent,
The cement composition comprises 20 to 60% by weight of blast furnace slag powder; 20 to 60 weight percent fly ash; 5 to 10% by weight of type 1 cement; 4-15% by weight of calcium oxide; And 0.3 to 2% by weight of any one of zirconyl chloride or zirconyl nitrate hydrate,
The admixture is any one selected from among admixtures in which polyethylene oxide and hydroxypropylene methyl cellulose are mixed at 3:1, carrageenan and liquid paraffin wax emulsion and hexylene glycol are mixed at 7:3,
The fluidizing agent is a mortar for repairing non-separated concrete in water, wherein the fluidizing agent is sulfonated melamine formaldehyde.
삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 제1항에 있어서,
규사 45 내지 60 중량%;
보강섬유 0.1 내지 0.5중량%; 및
수축 저감제로서 네오펜틸 글리콜(Neopentyhyl glycol) 2 내지 5중량%를 더 포함하고,
상기 규사는 굵기가 0.85 내지 1.22mm의 규사와 0.6 내지 0.85mm의 규사를 1:1로 배합하여 사용하며,
상기 보강섬유는 표면에 하이드록시기를 포함하는 것을 특징으로 하는 수중 불분리 콘크리트 보수용 몰탈.
The method of claim 1,
45 to 60% by weight of silica sand;
0.1 to 0.5% by weight of reinforcing fibers; And
Further comprising 2 to 5% by weight of neopentyhyl glycol as a shrinkage reducing agent,
The silica sand is used by mixing a silica sand having a thickness of 0.85 to 1.22 mm and a silica sand having a thickness of 0.6 to 0.85 mm at 1:1,
The reinforcing fiber is a mortar for repairing non-separated concrete in water, characterized in that it contains a hydroxyl group on the surface.
삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 콘크리트의 파손 또는 열화된 부위를 절단하는 단계;
상기 절단 부위에 고압의 기체를 분사하여 세척하는 단계; 및
상기 세척한 절단 부위에 청구항 제1항의 몰탈을 1차 타설하여 충진하는 단계를 포함하는 것을 특징으로 하는 콘크리트 수중 보수방법.
Cutting the damaged or deteriorated part of the concrete;
Washing by injecting a high-pressure gas to the cutting area; And
A concrete underwater repair method comprising the step of first pouring and filling the mortar of claim 1 in the washed cut portion.
삭제delete
KR1020200003847A 2020-01-10 2020-01-10 Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same KR102164561B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020200003847A KR102164561B1 (en) 2020-01-10 2020-01-10 Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020200003847A KR102164561B1 (en) 2020-01-10 2020-01-10 Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same

Publications (1)

Publication Number Publication Date
KR102164561B1 true KR102164561B1 (en) 2020-10-13

Family

ID=72884922

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020200003847A KR102164561B1 (en) 2020-01-10 2020-01-10 Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same

Country Status (1)

Country Link
KR (1) KR102164561B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102590809B1 (en) * 2022-06-14 2023-10-20 주식회사 한강이앤씨 Ultra rapid hardening and water inseparable mortar composition comprising industrial by-products aggregates of ferronickel slag and waste garnet, and the method of repairing and reinforcing underwater concrete structures using the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100105091A (en) * 2009-03-20 2010-09-29 롯데건설 주식회사 Chemical admixture for viscosity reduction of cement compound and high strength concrete composition using the same
KR20130017036A (en) * 2011-08-09 2013-02-19 주식회사 케미콘 Self leveling mortar using bottom ash as fine aggregates
KR20140012232A (en) * 2012-07-19 2014-02-03 한국건설기술연구원 High-fluid, subaqueous non-separated concrete admixture and this adding high-fluid, subaqueous non-separated concrete composition
KR101472485B1 (en) * 2014-09-24 2014-12-12 (주)도은건설 Geo-polymer mortar cement composition using the same construction methods
KR101772625B1 (en) * 2017-01-11 2017-08-29 주식회사 미다스건설 Concrete reinforcing composition and construction method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100105091A (en) * 2009-03-20 2010-09-29 롯데건설 주식회사 Chemical admixture for viscosity reduction of cement compound and high strength concrete composition using the same
KR20130017036A (en) * 2011-08-09 2013-02-19 주식회사 케미콘 Self leveling mortar using bottom ash as fine aggregates
KR20140012232A (en) * 2012-07-19 2014-02-03 한국건설기술연구원 High-fluid, subaqueous non-separated concrete admixture and this adding high-fluid, subaqueous non-separated concrete composition
KR101472485B1 (en) * 2014-09-24 2014-12-12 (주)도은건설 Geo-polymer mortar cement composition using the same construction methods
KR101772625B1 (en) * 2017-01-11 2017-08-29 주식회사 미다스건설 Concrete reinforcing composition and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102590809B1 (en) * 2022-06-14 2023-10-20 주식회사 한강이앤씨 Ultra rapid hardening and water inseparable mortar composition comprising industrial by-products aggregates of ferronickel slag and waste garnet, and the method of repairing and reinforcing underwater concrete structures using the same

Similar Documents

Publication Publication Date Title
Rajhans et al. Sustainable self compacting concrete from C&D waste by improving the microstructures of concrete ITZ
Itim et al. Compressive strength and shrinkage of mortar containing various amounts of mineral additions
Hasholt et al. Frost resistance of concrete with high contents of fly ash-A study on how hollow fly ash particles distort the air void analysis
Rajhans et al. Proposed mix design method for producing sustainable self compacting heat cured recycled aggregate concrete and its microstructural investigation
Nayana et al. Strength and durability study on cement mortar with ceramic waste and micro-silica
Hellebois et al. 100-year-old Hennebique concrete, from composition to performance
KR102164561B1 (en) Cement composition and anti-washout mortar for repairing concrete and repair method of concrete structure using the same
Arum et al. Making of strong and durable concrete
Benkaddour et al. Rheological, mechanical and durability performance of some North African commercial binary and ternary cements
CN114436583A (en) Expansion fiber anti-cracking waterproof concrete and preparation method thereof
Ranjitham et al. Performance Assessment of Self Compacting Concrete Incorporating Mineral Admixtures
Collepardi et al. Properties of SCC and flowing concrete
Hooton et al. Evaluation of modifications to the ASTM C672 deicer salt scaling test for concrete containing slag cement
Panchmatia et al. Nanosilica Coated Aggregates: Effects on Strength, Microstructure, and Transport Properties of Hydraulic Cement Mortars
Kammouna Enhancing the Properties of Sulfate-Resisting Cement
Baričević et al. Construction of a new day hospital in Zadar using recycled aggregate concrete
JP7437207B2 (en) Mortar for reinforced concrete and reinforcement method for reinforced concrete
JPS6224372B2 (en)
Vyšvařil et al. Influence of the aggregate type on the properties of dolomitic lime-based mortars
Makunza Performance of high workability plaster mortar for water tanks
Zhang et al. Damage model of fresh concrete in sulphate environment
Demirci et al. Effect of strength class of concrete and curing conditions on capillary water absorption of self-compacting and conventional concrete
Putri et al. A study of alkali-silica reaction on greenstone aggregate
Bi et al. Development of Mix Proportion for High-Performance Concrete Using Locally Available Ingredients Based on Compressive Strength and Durability
JP4293368B2 (en) Strength control method for expanded concrete

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant