KR100770389B1 - Composite of fire-resisting mortar with ultra high ductility, and a combined methods of fire-proof coating and repair using its material - Google Patents

Composite of fire-resisting mortar with ultra high ductility, and a combined methods of fire-proof coating and repair using its material Download PDF

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KR100770389B1
KR100770389B1 KR20070035421A KR20070035421A KR100770389B1 KR 100770389 B1 KR100770389 B1 KR 100770389B1 KR 20070035421 A KR20070035421 A KR 20070035421A KR 20070035421 A KR20070035421 A KR 20070035421A KR 100770389 B1 KR100770389 B1 KR 100770389B1
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이명호
김재환
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(주)피엔알시스템
한국진단보강(주)
(주)에이엠에스 엔지니어링
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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
    • 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
    • C04B16/0616Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B16/0641Polyvinylalcohols; Polyvinylacetates
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    • 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
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    • 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
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    • 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
    • C04B18/146Silica fume
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    • 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
    • C04B20/0016Granular materials, e.g. microballoons
    • C04B20/002Hollow or porous granular materials
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    • 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
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    • 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
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    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • CCHEMISTRY; METALLURGY
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    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
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    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/44Thickening, gelling or viscosity increasing agents
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    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/56Opacifiers
    • C04B2103/58Shrinkage reducing agents
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    • 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
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00482Coating or impregnation materials
    • C04B2111/00551Refractory coatings, e.g. for tamping
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    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/28Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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    • 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
    • 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

Abstract

A fire-resistant mortar composition having high ductility is provided to ensure mechanical performances and substance permeation resistance more superior than the conventional polymer cements and have excellent crack-controllable performances. A fire-resistant mortar composition having high ductility comprises 20-40wt% of silica, 20-30wt% of cement, 5-15wt% of fly ash, 0.1-1.0wt% of silica fume, 3-10wt% of calcium carbonate, 0.1-5wt% of hollow porous ceramic, 1-4wt% of a CSA-based blowing agent, 1-5wt% of powdered resin, 0.01-0.08wt% of a thickener, 0.01-0.25wt% of a shrinkage-reducing material, 0.1-0.5wt% of a water-reducing agent, 0.01-0.20wt% of an air entraining agent, and the balance of water. The composition further includes 0.95-1.80 parts by volume of high tension polyvinylalcohol fibers having a diameter of 26-100micron, a length of 3-15mm, and a tensile strength of 1,200-1,900 MPa based on 100 parts by volume of the fire-resistant mortar composition having high ductility.

Description

고인성 내화모르터 조성물과 이를 이용한 콘크리트구조물의 내회피복 보수공법{Composite of fire-resisting mortar with ultra high ductility, and a combined methods of fire-proof coating and repair using its material}Composite of fire-resisting mortar with ultra high ductility, and a combined methods of fire-proof coating and repair using its material}

도 1은 직접인장시험 후 본 발명의 고인성 내화모르터에 발생된 멀티플크랙의 일례를 나타낸 사진이다.1 is a photograph showing an example of multiple cracks generated in the high toughness fireproof motor of the present invention after the direct tensile test.

도 2는 RABT 가열시험 종료 후에 있어서 비교예1에 발생된 폭렬현상의 일례를 나타낸 사진이다.2 is a photograph showing an example of the explosion phenomenon generated in Comparative Example 1 after the completion of the RABT heating test.

도 3은 RABT 가열시험 종료 후에 있어서 비교예2에 발생된 균열의 일례를 나타낸 사진이다.3 is a photograph showing an example of cracks generated in Comparative Example 2 after the completion of the RABT heating test.

도 4는 RABT 가열시험 종료 후에 있어서 실시예1의 외관을 나타낸 사진이다.4 is a photograph showing the appearance of Example 1 after the completion of the RABT heating test.

본 발명은 콘크리트구조물의 내구성능과 내화성능을 동시에 증대시킬 수 있는 고인성 내화모르터 조성물과, 이를 이용하여 기설 또는 신설 구조물의 내화피복 보수공법에 관한 것이다.The present invention relates to a high toughness refractory mortar composition that can increase the durability and fire resistance of the concrete structure at the same time, and to a fireproof repair repair method for existing or new structures using the same.

지금까지 건설된 터널, 지하철, 지하공동구 등의 사회간접자본(SOC)시설이 공용년수가 경과 됨에 따라 균열, 누수, 박리·박락, 철근부식 등 다양한 형태의 열화가 급격히 발생 되고 있으며, 최근 들어 이들 구조물에 대한 보수공사가 점점 증가되고 있다. As SOC facilities, such as tunnels, subways, underground underground areas, have been used for years, various forms of deterioration such as cracks, leaks, peeling and peeling, and steel corrosion have occurred rapidly. Repair work on the structure is increasing.

한편, 대구지하철 화재사건(2003년)을 비롯하여 부산냉동창고화재(1998년), 덴마크의 그리트벨트터널화재(1994년), 영·불해엽터널화재(1996년), 프랑스의 몽블랑터널화재(1999년)와 고트하드터널화재(2001년), 스페인의 윈저타워화재(2005년) 등 대규모 화재발생건수가 전세계적으로 증대되고 있으며, 이러한 사례에서도 볼 수 있듯이 화재에 의해 인명피해뿐만 아니라 콘크리트부재에서도 폭렬, 박리·박락 등이 발생되어 구조내력이 급격히 저하되거나 심지어 붕괴되는 사례도 있어 콘크리트구조물의 내화대책에 대한 관심이 집중되고 있다.In addition, Daegu Subway Fire Incident (2003), Busan Frozen Warehouse Fire (1998), Gritbelt Tunnel Fire in Denmark (1994), Young and Fire Leaf Tunnel Fire (1996), and Mont Blanc Tunnel Fire in France (1999) ), Gotthard Tunnel Fire (2001), and Windsor Tower Fire (2005) in Spain, the number of large-scale fires is increasing worldwide. There is a case where the structural strength decreases or even collapses due to explosion, peeling, peeling, etc., and thus, attention is focused on the fire resistance measures of concrete structures.

이러한 배경하에서, 열화된 콘크리트구조물을 보수하기 위해 다양한 공법 및 재료가 개발되어 활용되고 있으며, 그 대표적인 보수재료가 단면복구재로 사용되는 폴리머시멘트모르터이다. 한편, 터널, 지하공간 등 기설 콘크리트구조물의 내화대책으로는 콘크리트 표면에 퍼라이트, 버미큘라이트 등을 주성분으로 하는 내화뿜칠재를 도포하는 내화피복공법이 대표적인 사례이다.Under these backgrounds, various construction methods and materials have been developed and utilized to repair deteriorated concrete structures, and the typical repair materials are polymer cement motors used as cross-sectional restoration materials. On the other hand, as a countermeasure for fireproofing of existing concrete structures such as tunnels and underground spaces, a fireproof coating method of applying a fireproof coating material mainly containing perlite and vermiculite on a concrete surface is a representative example.

즉, 상기의 폴리머시멘트모르터는 열화된 부위를 제거한 후 복구하는 단면복구재로서, 모체콘크리트와의 일체성, 물질투과저항성, 높은 압축강도 등으로 재균열이 발생하기 이전에는 우수한 보수효과를 발현할 수 있으나, 수축, 진동, 충격, 과하중 등에 의해 균열이 발생한 후에는 전술한 보수효과를 발휘할 수 없으며, 더욱이 이들 폴리머시멘트모르터는 도2와 같이 RABT 가열곡선하에서 심각한 폭렬현상 이 발생되는 것으로 조사되었다.In other words, the polymer cement motor is a cross-sectional recovery material that recovers after removing the deteriorated portion, and exhibits excellent repair effect before re-cracking occurs due to the integrity of the concrete, material permeability, and high compressive strength. However, after the cracking occurs due to shrinkage, vibration, shock, and overload, the above-mentioned repair effects cannot be exerted, and furthermore, these polymer cement motors have been shown to cause severe explosion under the RABT heating curve as shown in FIG. .

또한, 상기의 내화뿜칠재는 우수한 차열성능, 경량성, 다공성 등의 특징을 가지고 있어 화재발생시 구조체의 내화성능을 향상시킬 수는 있으나, 다량의 기포 또는 공극을 가지고 있어 외부열화인자의 침투가 용이하고, 수분을 흡수하거나 진동, 충격 등을 받으면 쉽게 박리·박락되어 터널 등 지하구조물의 내화재료로 사용될 경우 장기적인 사용이 곤란하게 된다.In addition, the refractory material is characterized by excellent heat shielding performance, light weight, porosity, etc. can improve the fire resistance of the structure in the event of a fire, but has a large amount of bubbles or voids to facilitate the penetration of external deterioration factors. In addition, when water is absorbed or subjected to vibration, impact, etc., it is easily peeled and peeled off, and when used as a refractory material of underground structures such as tunnels, it becomes difficult to use for a long time.

전술한 바와 같이, 터널, 지하철, 지하공동구 등 SOC시설의 내구수명연장과 더불어 내화안전성을 동시에 향상시키기 위해서는 보수성능과 내화성능을 겸비한 재료 및 공법의 개발이 필요하게 된다.As described above, in order to simultaneously improve the durability and fire resistance of SOC facilities such as tunnels, subways and underground co-zones, it is necessary to develop materials and methods having both a repair performance and a fire resistance performance.

본 발명은 종래 폴리머시멘트모르터보다도 우수한 역학성능과 물질투과저항성을 확보하면서 휨·인장하중 하에서 균열제어성능이 탁월하여 보수시공 후 균열발생을 대폭 저감시킬 뿐만 아니라, 모체콘크리트에 재균열이 발생하여도 이를 마이크로크랙으로 분산시켜 외부열화인자의 침입과 철근부식을 억제할 수 있으며, 더욱이 RABT 가열곡선과 같은 가혹한 화재조건 하에서도 폭렬·박리·박락 등의 발생없이 구조체의 수열온도를 200℃ 이하로 저감시킬 수 있는 고인성 내화모르터의 조성물을 제공하고자 한다. The present invention provides excellent crack control performance under flexural and tensile loads while ensuring superior mechanical performance and material permeation resistance than conventional polymer cement motors, and greatly reduces the occurrence of cracks after repairing, even if re-cracking occurs in the mother concrete. By dispersing it into microcracks, it is possible to suppress ingress of external deterioration factors and reinforcement corrosion. Furthermore, even under severe fire conditions such as the RABT heating curve, the hydrothermal temperature of the structure is reduced to 200 ° C or less without the occurrence of explosion, peeling, or falling off. It is to provide a composition of a high toughness refractory mortar that can be made.

또한, 이러한 고인성 내화모르터를 이용하여 콘크리트구조물의 내구성능과 내화성능을 동시에 향상시킬 수 있는 내화피복 보수공법을 제공하고자 한다.In addition, to provide a fireproof coating repair method that can improve the durability and fire resistance of the concrete structure by using a high toughness fire motor.

상기 목적을 달성하기 위한 본 발명에 따른 고인성 내화모르터 조성물은 규사 : 20~40중량%, 시멘트 : 20~30중량%, 플라이애시 : 5~15중량%, 실리카흄 : 0.1~1.0중량%, 탄산칼슘 : 3~10중량%, 중공세라믹 다공체 : 0.1~5중량%, CSA계 팽창재 : 1~4중량%, 분말수지 : 1~5중량%, 증점제 : 0.01~0.08중량%, 수축저감재 : 0.01~0.25중량%, 감수제 : 0.1~0.5중량%, 공기조정제 : 0.01~0.20중량%, 나머지는 물로 이루어진다.High toughness refractory mortar composition according to the present invention for achieving the above object is silica sand: 20 to 40% by weight, cement: 20 to 30% by weight, fly ash: 5 to 15% by weight, silica fume: 0.1 to 1.0% by weight, carbonic acid Calcium: 3-10% by weight, Hollow ceramic porous body: 0.1-5% by weight, CSA-based expander: 1-4% by weight, powder resin: 1-5% by weight, thickener: 0.01-0.08% by weight, shrinkage reducing material: 0.01 ~ 0.25% by weight, water reducing agent: 0.1-0.5% by weight, air conditioner: 0.01-0.20% by weight, the remainder is water.

그리고 상기 조성비를 갖는 고인성 내화모르터 조성물 100용적부에 대하여 직경 : 26~100㎛, 길이 : 3~15mm, 인장강도 : 1,200~1,900MPa를 갖는 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부가 추가 투입되고, 또 상기 고인성 내화모르터 조성물 100용적부에 대하여 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부와, 직경 : 12~50㎛, 섬유길이 : 6~15mm, 인장강도 : 2,200~3,000MPa를 갖는 고장력 PE(폴리에틸렌)섬유 0.05~0.70용적부 투입된다.And with respect to 100 parts by volume of the high toughness fire-resistant motor composition having the composition ratio 0.95 ~ 1.80 parts by volume of high tensile PVA (polyvinyl alcohol) fiber having a diameter: 26 ~ 100㎛, length: 3 ~ 15mm, tensile strength: 1,200 ~ 1,900MPa In addition, with respect to 100 parts by volume of the highly tough fire-resistant motor composition, 0.95 to 1.80 parts by volume of high tension PVA (polyvinyl alcohol) fibers, diameter: 12 to 50 µm, fiber length: 6 to 15 mm, tensile strength: 2,200 to 0.05 to 0.70 parts by volume of high tensile PE (polyethylene) fiber having 3,000 MPa is introduced.

또한 상기 목적을 달성하기 위한 본 발명에 따른 콘크리트구조물의 내화피복 보수공법은 콘크리트구조물의 보수공사에 있어서, 콘크리트구조물의 열화부를 제거하고 고압수로 이물질을 제거하는 바탕처리단계; 상기 열화부가 제거된 부분에 규사 : 20~40중량%, 시멘트 : 20~30중량%, 플라이애시 : 5~15중량%, 실리카흄 : 0.1~1.0중량%, 탄산칼슘 : 3~10중량%, 중공세라믹 다공체 : 0.1~5중량%, CSA계 팽창재 : 1~4중량%, 분말수지 : 1~5중량%, 증점제 : 0.01~0.08중량%, 수축저감재 : 0.01~0.25중량%, 감수제 : 0.1~0.5중량%, 공기조정제 : 0.01~0.20중량%, 나머지는 물로 이루어진 조성비를 갖는 고인성 내화모르터를 충전단계; 상기 고인성 내화모르터가 경화하기 전에 피막수밀제를 도포하여 미장하는 미장마감단계;로 이루어진다.In addition, the fireproof coating repair method of the concrete structure according to the present invention for achieving the above object, in the repair work of the concrete structure, the base treatment step of removing the deterioration of the concrete structure and removing foreign matter with high pressure water; Silica sand: 20 to 40% by weight, cement: 20 to 30% by weight, fly ash: 5 to 15% by weight, silica fume: 0.1 to 1.0% by weight, calcium carbonate: 3 to 10% by weight, hollow portion Ceramic porous body: 0.1-5% by weight, CSA-based expansion material: 1-4% by weight, powder resin: 1-5% by weight, thickener: 0.01-0.08% by weight, shrinkage reducing material: 0.01-0.25% by weight, water reducing agent: 0.1- 0.5% by weight, air conditioner: 0.01 ~ 0.20% by weight, the remaining step of filling a high toughness refractory motor having a composition consisting of water; Plasma finishing step of applying and coating the film watertight agent before the high toughness fire-resistant curing.

그리고 상기 조성비를 갖는 고인성 내화모르터 조성물 100용적부에 대하여 직경 : 26~100㎛, 길이 : 3~15mm, 인장강도 : 1,200~1,900MPa를 갖는 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부가 추가 투입되고, 상기 고인성 내화모르터 조성물 100용적부에 대하여 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부와, 직경 : 12~50㎛, 섬유길이 : 6~15mm, 인장강도 : 2,200~3,000MPa를 갖는 고장력 PE(폴리에틸렌)섬유 0.05~0.70용적부가 투입되며, 상기 미장마감단계 후 방수성능과 미관을 보다 향상시키기 위하여 미장 표면에 변성실리콘계 수지를 도포하는 표면코팅단계를 더 포함된다.And with respect to 100 parts by volume of the high toughness fire-resistant motor composition having the composition ratio 0.95 ~ 1.80 parts by volume of high tensile PVA (polyvinyl alcohol) fiber having a diameter: 26 ~ 100㎛, length: 3 ~ 15mm, tensile strength: 1,200 ~ 1,900MPa A high tensile PVA (polyvinyl alcohol) fiber, 0.95 ~ 1.80 volumes, diameter: 12 ~ 50㎛, fiber length: 6 ~ 15mm, tensile strength: 2, 200 ~ 3,000 with respect to 100 parts by volume of the high toughness refractory motor composition 0.05 to 0.70 parts by volume of high tensile PE (polyethylene) fiber having MPa is added, and further includes a surface coating step of applying a modified silicone-based resin on the surface of the plasterer in order to further improve the waterproof performance and aesthetics after the plastering step.

이하에 본 발명의 구성에 대하여 상세히 설명하면 다음과 같다.Hereinafter, the configuration of the present invention will be described in detail.

본 발명은 먼저 내화성능과 더불어 보수성능을 겸비한 고인성 내화모르터의 조성물에 관한 것으로, 본 발명의 고인성 내화모르터는 시멘트, 규사, 플라이애시, 실리카흄, 중공세라믹다공체, 탄산칼슘, 팽창재, 수축저감제, 분말수지, 증점제, 감수제, 공기조정제, 물로 이루어진 매트릭스와, 고장력 PVA섬유 또는 고장력 PE섬유로 이루어진 보강섬유로 구성된다.The present invention relates to a composition of a high toughness refractory mortar having both a fire resistance and a repair performance. The high toughness refractory mortar of the present invention is cement, silica sand, fly ash, silica fume, hollow ceramics, calcium carbonate, expandable material, shrinkage reduction. And a matrix composed of a powder resin, a thickener, a water reducing agent, an air conditioner, and water, and a reinforcing fiber composed of a high tensile PVA fiber or a high tensile PE fiber.

상기 시멘트로는 포틀랜드시멘트가 사용되며, 그 사용량은 20~30중량%이다. 상기 시멘트량이 20중량% 미만이면 초기강도의 확보가 곤란하며, 30중량%를 초과하면 경화수축량이 증대되어 시공 후 균열이 발생될 우려가 있어 시멘트 사용량은 20~30중량%로 함이 바람직하다.Portland cement is used as the cement, the amount of which is 20 to 30% by weight. When the amount of cement is less than 20% by weight, it is difficult to secure initial strength, and when the amount of cement exceeds 30% by weight, the amount of hardening shrinkage may increase and cracks may occur after construction. Therefore, the amount of cement used is preferably 20 to 30% by weight.

상기 규사는 잔골재로서 20~40중량%가 사용되며, 6호사 : 7호사 : 8호사가 1 : 6 : 3의 중량비로 혼합된 것을 사용하는 것이 바람직하다. 즉, 20중량% 미만인 경우에는 경화과정에서의 수축량이 급격히 증가되며, 40중량%를 초과할 경우에는 매트릭스의 파괴터프니스가 증대되어 멀티플크랙을 기대하기 곤란하다. 따라서 규사의 사용량은 20~40중량%를 사용함이 바람직하다.The silica sand 20 to 40% by weight is used as the fine aggregate, it is preferable to use a mixture of No. 6: No. 7: No. 8 company in a weight ratio of 1: 6: 3. That is, when the amount is less than 20% by weight, the shrinkage in the curing process is rapidly increased. When the amount is more than 40% by weight, the fracture toughness of the matrix is increased, so that it is difficult to expect multiple cracks. Therefore, the amount of silica sand is preferably used 20 to 40% by weight.

상기 플라이애시는 한국산업규격(KS L 5405)의 1종 플라이애시가 사용되며, 그 사용량은 5~15중량%이다. 즉, 5중량% 미만이면 비빔작업과 뿜칠 작업 시 볼베어링 효과를 발휘하기 곤란하며, 15중량%를 초과하면 점성이 지나치게 증가 되거나 강도발현율이 저하될 우려가 있다. 따라서 플라이애시 사용량은 5~15중량%를 사용함이 바람직하다.The fly ash is one kind of fly ash of the Korean Industrial Standard (KS L 5405) is used, the amount is 5 to 15% by weight. That is, if less than 5% by weight it is difficult to exert a ball bearing effect during the bibim work and spraying work, if the content exceeds 15% by weight there is a fear that the viscosity is excessively increased or the strength expression rate is lowered. Therefore, it is preferable to use 5 to 15% by weight of the fly ash.

상기 실리카흄은 분말도가 200,000cm2/g 내외인 것을 사용하는 것이 바람직하며, 그 사용량은 0.1~1.0중량%이다. 즉, 0.1중량% 미만이면 첨가에 따른 충진효과를 기대하기 곤란하며, 1.0중량%를 초과하면 초기강도의 발현이 지연될 우려가 있다. 따라서 실리카흄의 사용량은 0.1~1.0중량%를 사용함이 바람직하다. It is preferable to use the silica fume having a powder degree of about 200,000 cm 2 / g, the amount of the use is 0.1 to 1.0% by weight. That is, if less than 0.1% by weight it is difficult to expect the filling effect of the addition, if the content exceeds 1.0% by weight there is a fear that the expression of the initial strength is delayed. Therefore, the amount of silica fume is preferably used 0.1 to 1.0% by weight.

상기 탄산칼슘(CaCO3)은 매트릭스 내부 공극을 채워주는 충전재로서 평균입자가 10㎛ 내외의 것을 사용하는 것이 바람직하며, 그 사용량은 3~10중량%이다. 즉, 3중량% 미만이면 첨가에 따른 충전효과가 미미하며, 10중량%를 초과하면 초기강도를 저하시킬 우려가 있다. 따라서 탄산칼슘의 사용량은 3~10중량%를 사용함이 바람직하다. The calcium carbonate (CaCO 3 ) is a filler for filling the internal voids of the matrix, it is preferable to use the average particle of about 10㎛, the amount of use is 3 to 10% by weight. In other words, if less than 3% by weight, the filling effect of the addition is insignificant, if it exceeds 10% by weight there is a risk of lowering the initial strength. Therefore, the amount of calcium carbonate is preferably used 3 to 10% by weight.

상기 중공세라믹다공체는 속이 빈 구형의 세라믹재로 평균입경 80~300㎛, 밀도 0.25~0.5g/cm3, 융점 1,600℃ 이상, 열전도율 0.1W/m℃ 이하인 것을 사용하는 것이 바람직하며, 그 사용량은 0.1~5.0중량%이다. 즉, 0.1중량% 미만이면 화재시 목표차열성능을 만족시키기 못하며, 5.0중량%를 초과하면 급격한 강도저하를 초래할 수 있다. 따라서 중공세라믹다공체의 사용량은 0.1~5.0중량%를 사용함이 바람직하다.The hollow ceramic porous body is a hollow spherical ceramic material having an average particle size of 80 ~ 300㎛, density of 0.25 ~ 0.5g / cm 3 , melting point of 1,600 ℃ or more, thermal conductivity of 0.1W / m ℃ or less, it is preferable to use the amount 0.1-5.0 weight%. That is, if less than 0.1% by weight does not satisfy the target thermal insulation performance in the fire, if it exceeds 5.0% by weight may cause a sharp decrease in strength. Therefore, the amount of the hollow ceramic porous body is preferably used 0.1 to 5.0% by weight.

상기 팽창재는 칼슘설퍼알루미네이트(CSA)계의 사용이 바람직하며, 그 사용량은 1~4중량%이다. 즉, 1중량% 미만이면 첨가에 따른 수축보상효과를 발휘하기 곤란하며, 4중량%를 초과하면 지나친 팽창에 의해 모체와 보수층의 계면탈락을 유발할 수 있다. 따라서 팽창재의 사용량은 1~4중량%를 사용함이 바람직하다.The expansion material is preferably used calcium sulfaluminate (CSA) system, the amount is 1 to 4% by weight. In other words, if less than 1% by weight it is difficult to exhibit the effect of shrinkage compensation according to the addition, if it exceeds 4% by weight can cause the interface of the mother and the water-retaining layer due to excessive expansion. Therefore, it is preferable to use 1 to 4% by weight of the expansion material.

상기 분말수지는 아크릴계 및 EVA계 분말수지의 사용이 바람직하며, 그 사용량은 1~5중량%이다. 즉, 1중량% 미만이면 첨가에 따른 부착력 및 유동성 향상을 기대할 수 없으며, 5중량%를 초과하면 첨가효과에 비해 경제성이 급격히 저하된다. 따라서 분말수지의 사용량은 1~5중량%를 사용함이 바람직하다.The powder resin is preferably used of acrylic and EVA powder resin, the amount is 1 to 5% by weight. That is, if less than 1% by weight can not be expected to improve the adhesion and fluidity due to the addition, if more than 5% by weight is economically sharply lower than the additive effect. Therefore, it is preferable to use 1 to 5% by weight of the powdered resin.

상기 증점제는 매트릭스에 점성을 부여하여 섬유의 균질한 분산을 유도하기 위한 것으로, 메틸셀룰로스계 증점제의 사용이 바람직하며, 그 사용량은 0.01~0.08중량%이다. 즉, 0.01중량% 미만이면 점성이 적어 섬유의 균질한 분산을 기대하기 곤란하며, 0.08중량%를 초과하면 지나친 점성으로 인해 비빔작업과 뿜칠작업이 어렵게 된다. 따라서 증점제의 사용량은 0.01~0.08중량%를 사용함이 바람직하다.The thickener is to induce a homogeneous dispersion of the fibers by imparting viscosity to the matrix, the use of a methyl cellulose thickener is preferred, the amount is 0.01 to 0.08% by weight. In other words, less than 0.01% by weight is difficult to expect a homogeneous dispersion of the fiber is less viscous, when exceeding 0.08% by weight it becomes difficult to work and spray the bibim due to excessive viscosity. Therefore, it is preferable to use 0.01 to 0.08% by weight of the thickener.

상기 수축저감재는 매트릭스의 소성수축 또는 건조수축을 저감하기 위한 것으로 글루콜즈계 수축저감제의 사용이 바람직하며, 그 사용량은 0.01~0.25중량%이다. 즉, 0.01중량% 미만이면 첨가에 따른 수축저감효과가 미미하며, 0.25중량%를 초과하면 경화후 강도저하를 초래할 수 있다. 따라서 수축저감재의 사용량은 0.01~0.25중량%를 사용함이 바람직하다.The shrinkage reducing material is to reduce the plastic shrinkage or dry shrinkage of the matrix, it is preferable to use a glucols-based shrinkage reducing agent, the amount of use is 0.01 to 0.25% by weight. That is, less than 0.01% by weight of the shrinkage reduction effect according to the addition is insignificant, if it exceeds 0.25% by weight may cause a decrease in strength after curing. Therefore, the amount of shrinkage reducing agent is preferably used 0.01 to 0.25% by weight.

상기 감수제는 비빔시 유동성을 부여하기 위한 것으로 폴리카르본산계 또는 멜라민계 또는 나프탈렌계 또는 이들을 혼합한 것을 사용하는 것이 바람직하며, 그 사용량은 0.1~0.5중량%이다. 즉, 0.1중량% 미만이면 소정의 유동성을 만족시키지 못하며, 0.5중량%를 초과하면 지나친 유동성에 의해 뿜칠 후 모체로부터 흘러내릴 우려가 있다. 따라서 감수제의 사용량은 0.1~0.5중량%를 사용함이 바람직하다.The water reducing agent is for imparting fluidity upon bibim, and it is preferable to use a polycarboxylic acid type, melamine type, or naphthalene type or a mixture thereof, and the amount thereof is 0.1 to 0.5% by weight. That is, if less than 0.1% by weight does not satisfy the predetermined fluidity, if it exceeds 0.5% by weight there is a risk of flowing out of the mother body after the spray by excessive fluidity. Therefore, the amount of the water reducing agent is preferably used 0.1 to 0.5% by weight.

상기 공기조정(AE)제는 계면활성제로서 아크릴모노머가 주성분인 것을 사용하는 것이 바람직하며, 그 사용량은 0.01~0.20중량%이다. 즉, 0.01중량% 미만이면 엔트래인드에어(Entrain air)의 발생이 적어 효과를 기대하기 곤란하며, 0.20중량%를 초과하면 경화 후 급격한 강도저하 및 내구성저하를 초래하게 된다. 따라서 공기조정(AE)제의 사용량은 0.01~0.20중량%를 사용함이 바람직하다.It is preferable that the said air conditioning agent (AE) uses what whose acryl monomer is a main component as surfactant, The usage-amount is 0.01-0.20 weight%. That is, if less than 0.01% by weight of the entrained air (Entrain air) is less likely to produce the effect is difficult to expect, if it exceeds 0.20% by weight it will lead to a sharp drop in strength and durability after curing. Therefore, it is preferable that the usage-amount of an air conditioning agent (AE) uses 0.01 to 0.20 weight%.

또한 상기 고장력 PVA섬유는 매트릭스를 보강하여 경화체가 휨 또는 인장하중 하에서 변형경화거동과 멀티플크랙을 발휘할 수 있도록 하고, 또한 화재시에는 융용하여 매트릭스 내의 수증기압을 저감시켜 폭렬발생을 방지하기 위한 것으로, 일반적으로 사용되는 섬유와는 달리 인장강도가 1,200~1,900MPa로 고장력이면서 직경 : 26~100㎛, 길이 : 3~15mm이고 표면에 0.4~1.2%의 오일링처리를 실시한 것을 사용하는 것이 바람직하다. In addition, the high-strength PVA fiber is to reinforce the matrix so that the cured body can exert deformation hardening behavior and multiple cracks under bending or tensile load, and also melt in case of fire to reduce water vapor pressure in the matrix to prevent explosion. Unlike the fiber used as the tensile strength of 1,200 ~ 1,900MPa with high tensile strength: 26 ~ 100㎛, length: 3 ~ 15mm, it is preferable to use the oiled treatment of 0.4 ~ 1.2% on the surface.

그 사용량은 매트릭스 100용적부에 대하여 인장강도가 1,200~1,900MPa, 직경 : 26~100㎛, 길이 : 3~15mm인 고장력 PVA섬유를 0.95~1.8용적부로 하는 이유는 0.95용적부 미만이면 인장하중 하에서 변형경화거동을 기대하기 곤란하고, 1.80용적부를 초과하면 비빔시 균질한 분산과 뿜칠 시공이 곤란하게 된다.The amount used is 0.95 to 1.8 parts by volume for tensile strength PVA fibers having a tensile strength of 1,200 to 1,900 MPa, a diameter of 26 to 100 µm, and a length of 3 to 15 mm, based on 100 parts of the matrix. It is difficult to expect the deformation hardening behavior, and when it exceeds 1.80 vol, it becomes difficult to homogeneous dispersion and spraying at the time of bibeaming.

또 상기 고장력 PE섬유는 고장력 PVA섬유 대신으로 사용하거나 또는 고장력 PE섬유와 고장력 PVA섬유를 같이 사용할 수 있는데, 상기 PE섬유와 고장력 PVA섬유를 같이 사용하는 이유는 고장력 PVA섬유만을 사용한 경우에 비해 보강효과를 보다 증대시키기 위해 사용되는 것으로, 상기 고장력 PVA섬유량의 일부 대체하여 사용하며, 일반 섬유와는 달리 인장강도 2,200~3,000MPa, 직경 : 12~50㎛, 섬유길이 : 6~15mm인 고장력 PE섬유가 사용된다. In addition, the high tensile PE fiber may be used instead of the high tensile PVA fiber, or may be used together with the high tensile PE fiber and the high tensile PVA fiber. The reason why the PE fiber and the high tensile PVA fiber are used together is a reinforcement effect compared to the case where only the high tensile PVA fiber is used. It is used to further increase the part of the high tension PVA fiber, and replaces, and unlike the general fiber, tensile strength 2,200 ~ 3,000MPa, diameter: 12 ~ 50㎛, fiber length: 6 ~ 15mm high tensile PE fiber Is used.

그 사용량은 매트릭스 100용적부에 대하여 0.05~0.70용적부의 고장력 PE섬유를 상기 고장력 PVA섬유에서 공제한 양만큼 혼합하여 사용된다. 즉, 고장력 PVA섬유와 고장력 PE섬유의 혼합 사용량은 매트릭스 100용적부에 대하여 0.95~1,80용적부로 된다.The amount used is used by mixing 0.05 to 0.70 parts by volume of high tensile PE fiber with respect to 100 parts by volume of matrix by the amount subtracted from the high tensile PVA fibers. That is, the mixing amount of the high tension PVA fibers and the high tensile PE fibers is 0.95 to 1,80 vol parts with respect to 100 vol parts of the matrix.

여기서, 고장력 PE섬유의 사용량이 0.05용적부 미만이면 당해 섬유의 사용에 따른 보강효과의 상승을 기대하기 곤란하며, 0.70용적부를 초과하면 섬유의 균질한 분산이 곤란하게 된다.Here, if the amount of the high tensile strength PE fiber is less than 0.05 volume part, it is difficult to expect an increase in the reinforcing effect according to the use of the fiber, and if it exceeds 0.70 volume part, the homogeneous dispersion of the fiber becomes difficult.

한편, 상술한 바와 같이 다양한 재료들로 구성된 고인성 내화모르터는 현장에 있어서 계량 및 비빔작업의 효율화와 품질안정화를 도모하기 위해, 시멘트, 규 사, 플라이애시, 실리카흄, 탄산칼슘, 중공세라믹다공체, 팽창재, 수축저감재, 증점제, 분말수지로 구성된 분체재료와, 섬유, 감수제, 공기조정제로 구성된 기능성 재료를 별도로 포장하여 생산하는 것이 바람직하다. 즉, 현장에 있어서 고인성 내화모르터는 상기와 같이 별도 포장된 분체재료와 기능성 재료 및 필요한 물량을 일괄적으로 투입하여 비빔함으로서 다량의 섬유가 혼입됨에도 불구하고 비빔시간을 단축시킬 수 있으며, 비빔은 회전속도(RPM) 60 이상의 강제식 믹서를 사용하여 3분 이상을 실시하는 것이 바람직하다.On the other hand, as described above, the high toughness fire resistant motor composed of various materials is used in the field to improve efficiency and quality stabilization of weighing and bibim work, cement, silica sand, fly ash, silica fume, calcium carbonate, hollow ceramic porous body, It is preferable to separately package and produce a powder material composed of an expanding material, a shrinkage reducing agent, a thickener, and a powder resin, and a functional material composed of a fiber, a reducing agent, and an air conditioner. That is, in the field, the high toughness fire-resistant motor is able to shorten the beam time even though a large amount of fiber is mixed by beaming by separately adding the powder material, the functional material and the necessary quantity as described above. It is preferable to perform 3 minutes or more using the forced mixer of rotation speed (RPM) 60 or more.

본 발명의 두 번째 양태는, 상기의 고인성 내화모르터를 이용하여 콘크리트구조물의 내구성능과 내화성능을 동시에 향상시킬 수 있는 내화피복 보수공법에 관한 것이다. The second aspect of the present invention relates to a fireproof coating repair method that can improve the durability and fire resistance of the concrete structure by using the above high toughness fire resistant motor.

즉, 본 발명의 공법은 a) 콘크리트 표면의 열화부를 제거하고 고압수로 이물질을 제거하는 바탕처리단계;That is, the method of the present invention is a) a ground treatment step of removing the deterioration of the concrete surface and removing foreign matter with high pressure water;

b)상기 열화부가 제거된 부분에 규사 : 20~40중량%, 시멘트 : 20~30중량%, 플라이애시 : 5~15중량%, 실리카흄 : 0.1~1.0중량%, 탄산칼슘 : 3~10중량%, 중공세라믹 다공체 : 0.1~5중량%, CSA계 팽창재 : 1~4중량%, 분말수지 : 1~5중량%, 증점제 : 0.01~0.08중량%, 수축저감재 : 0.01~0.25중량%, 감수제 : 0.1~0.5중량%, 공기조정제 : 0.01~0.20중량%, 나머지는 물로 이루어진 조성비를 갖는 고인성 내화모르터를 충전단계;b) silica sand: 20-40% by weight, cement: 20-30% by weight, fly ash: 5-15% by weight, silica fume: 0.1-1.0% by weight, calcium carbonate: 3-10% by weight , Hollow ceramic porous body: 0.1 to 5% by weight, CSA-based expander: 1 to 4% by weight, powder resin: 1 to 5% by weight, thickener: 0.01 to 0.08% by weight, shrinkage reducing material: 0.01 to 0.25% by weight, water reducing agent: 0.1 to 0.5% by weight, air conditioner: 0.01 to 0.20% by weight, the remainder is filled with a high toughness refractory motor having a composition ratio consisting of water;

c)상기 고인성 내화모르터가 경화하기 전에 피막수밀제를 도포하여 미장하는 미장마감단계;로 이루어지는바, 이와 같이 시공공정이 간단하여 시공이 용이하고 공기단축이 가능하게 된다.c) The plaster finish step of applying and coating the water-tight coating agent before curing the high toughness fire-resistant motor; bar construction is simple, so that the construction process is easy and the air shortening is possible.

상기 바탕처리단계는 콘크리트 표면의 열화부를 브레커 또는 그라인더 또는 초고압워터젯장치에 의해 제거한 후, 표면에 부착된 이물질을 고압수에 의해 세정하는 단계이며, 기존의 보수공법과 동등한 방법에 의해 시행된다.The background treatment step is a step of removing the deterioration of the concrete surface by a breaker or grinder or ultra-high pressure water jet device, and then cleaning the foreign matter adhered to the surface by high pressure water, and is carried out by the same method as the existing repair method.

상기 고인성 내화모르터 충전단계는 현장에서 제조된 고인성 내화모르터를 바탕처리가 완료된 모체콘크리트의 표면에 미장시공 또는 뿜칠 시공에 의해 도포하는 단계이며, 고인성 내화모르터의 시공두께는 10~100mm로 설계하는 것이 바람직하다. 즉, 10mm 미만인 경우에는 충분한 보수성능을 발휘할 수 있으나 안정적인 내화성능을 발휘하기 곤란하며, 100mm를 초과할 경우에는 보수에 따른 시공비용의 과도한 증대를 초래하게 된다. 단 상기 고인성 내화모르터의 조성비와 그에 대한 작용은 상기에서 설명하였음으로 더이상의 설명은 생략하기로 한다. The high toughness refractory motor filling step is a step of applying the high toughness refractory motor manufactured on-site by the plastering or spraying the surface of the finished concrete, the construction thickness of the high toughness refractory motor is 10 ~ 100mm It is desirable to design. That is, if less than 10mm can exhibit sufficient repair performance, but it is difficult to exhibit a stable fire resistance performance, if it exceeds 100mm will cause an excessive increase in the construction cost according to the repair. However, since the composition ratio of the high toughness refractory mortar and its action have been described above, further description will be omitted.

상기 미장마감단계는 충전된 고인성 내화모르터의 표면을 평탄하게 마감하는 단계로, 이 단계에서는 모르터 표면의 凹凸을 흙손으로 1차 마감한 후, 그 위에 액상의 피막수밀제를 롤러나 스프레이장비로 얇게 도포하고, 마지막으로 흙손으로 그 표면을 평활하게 마감하는 것이 바람직하다. 즉, 미장단계에서 상기의 액상 피막수밀제를 도포함으로서 미장성능이 향상되고, 더욱이 고인성 내화모르터의 표층에 수밀층이 형성되어 방수성능이 보다 향상된다.The plaster finishing step is to finish the surface of the filled high toughness refractory mortar flat, and in this step, the first surface of the mortar surface is finished with a trowel, and then the liquid film watertight agent is applied onto the roller or spray equipment. It is desirable to apply a thin layer, and finally to finish the surface smoothly with a trowel. That is, the coating performance is improved by coating the liquid film watertight agent at the stage of plastering, and a watertight layer is formed on the surface layer of the high toughness fireproof motor to further improve the waterproofing performance.

또한, 본 발명의 공법은 상기의 미장 마감된 고인성 내화모르터가 경화된 후에 그 표면에 변성실리콘계 수지를 100~500㎛의 두께로 도포하는 표면코팅단계를 포함하며, 상기 변성실리콘계 수지는 인장변형성능이 0.5% 이상인 것을 사용하는 것이 바람직하다. 이와 같이, 고인성 내화모르터의 표면에 인장변형성능이 있는 수지를 도포함으로서 공용중에 진동, 충격, 과하중에 의해 모르터층에 마이크로크랙이 발생하더라도 이 균열을 추종함으로서 외부로부터 열화인자의 침입을 완전히 억제할 수 있으며, 더욱이 다양한 색상변화가 가능하여 보수면의 미관을 미려하게 할 수 있게 된다.In addition, the method of the present invention includes a surface coating step of applying a modified silicone-based resin to a thickness of 100 ~ 500㎛ on the surface of the plastering after finishing the high toughness fire-resistant mortar, the modified silicone-based resin is tensile strain It is preferable to use the thing whose performance is 0.5% or more. In this way, since a resin having tensile deformation ability is included on the surface of the high toughness refractory motor, even if microcracks occur in the mortar layer due to vibration, impact, and overload during use, the cracks can be followed to completely suppress the ingress of deterioration factors from the outside. In addition, it is possible to change a variety of colors and to beautify the beauty of the repair surface.

이하, 본 발명의 실시예에 대하여 상세하게 설명하고자 하며, 본 발명의 범위가 이들 실시예에 한정된 것은 아니다.Hereinafter, embodiments of the present invention will be described in detail, and the scope of the present invention is not limited to these examples.

아래의 표1은 본 발명의 실시예 및 비교예에 관한 배합사항을 나타낸 것으로, 실시예1은 보강섬유로서 고장력 PVA섬유만을 사용한 것, 실시예2는 고장력 PVA섬유와 고장력 PE섬유를 혼합 사용한 것이며, 비교예1은 중공세라믹다공체와 섬유를 혼입하지 않은 것, 비교예2는 중공세라믹다공체를 사용하지 않고 일반 PVA섬유를 사용한 것이다. Table 1 below shows the formulations of the Examples and Comparative Examples of the present invention, Example 1 is used only the high-strength PVA fibers as reinforcing fibers, Example 2 is a mixture of high-strength PVA fibers and high-tensile PE fibers In Comparative Example 1, the hollow ceramic porous body and the fiber were not mixed, and in Comparative Example 2, the hollow ceramic porous body was not used and general PVA fibers were used.

[표 1] 본 발명의 실시예 및 비교예에 관한 배합사항Table 1 Formulations relating to Examples and Comparative Examples of the Invention

구 분  division 실시예1Example 1 실시예2Example 2 비교예1Comparative Example 1 비교예2Comparative Example 2 비고Remarks 매 트 릭 스  Matrix 시멘트(중량%)Cement (% by weight) 28.0028.00 28.0028.00 26.0026.00 26.0026.00 1종 O.P.C, (주)성심양회Class 1 O.P.C, Sacred Heart Society 규사(중량%)Silica sand (% by weight) 32.0032.00 32.0032.00 30.0030.00 32.0032.00 천연규사Natural silica 플라이애시(중 량부)Fly Ash (weight part) 10.0010.00 10.0010.00 13.5013.50 13.5013.50 1종, (주)우리산업Type 1, Woori Industry 실리카흄(중량%)Silica fume (% by weight) 0.30.3 0.30.3 1.201.20 1.201.20 호주산Australian 탄산칼슘(중량%)Calcium Carbonate (wt%) 6.006.00 6.006.00 8.288.28 8.288.28 (주)케미우스코리아Chemius Korea 중공세라믹다공체(중량%)Hollow ceramic porous body (wt%) 4.004.00 4.004.00 0.000.00 0.000.00 (주)데로스Deros Co., Ltd. 팽창재(중량%)Expanding material (% by weight) 2.502.50 2.502.50 2.502.50 2.502.50 CSA계,(주)덴카CSA series, Tenka 분말수지(중량%)Powder Resin (wt%) 2.402.40 2.302.30 2.402.40 2.402.40 (주)케미콘Chemikon 증점제(중량%)Thickener (wt%) 0.020.02 0.020.02 0.020.02 0.020.02 (주)케미콘Chemikon 수축저감재(중량%)Shrinkage Reduction Material (wt%) 0.200.20 0.200.20 0.200.20 0.200.20 (주)케미콘Chemikon 감수제(중량%)Water reducing agent (% by weight) 0.200.20 0.230.23 0.300.30 0.300.30 (주)윈플로WinFlo 공기조정제(중량%)Air conditioner (wt%) 0.100.10 0.100.10 0.100.10 0.100.10 (주)윈플로WinFlo 물(중량%)Water (% by weight) 14.2814.28 16.3516.35 15.5015.50 15.5015.50 상수a constant 섬 유 fiber 고장력PVA섬유(용적부)High tensile PVA fiber (volume part) 2.002.00 1.601.60 0.000.00 0.500.50 (주)쿠라레Kuraray 고장력PE섬유(용적부)High tensile PE fiber (volume part) 0.000.00 0.400.40 0.000.00 0.000.00 (주)다이니마Dainima

또한, 본 발명의 실시예 및 비교예에 있어서 비빔은 용량 100리터의 팬믹서를 사용하여 제조하였으며, 비빔직후 각 시험용 몰드에 타설한 후, 24 시간동안 실내에서 존치하였다. 그 후 탈형하여 온도 20 ± 3℃, 습도 60 ± 5%의 항온실에서 소정의 측정재령까지 양생하여 시험체의 제작을 완료하였다.In addition, in the examples and comparative examples of the present invention, the bibeam was manufactured using a fan mixer having a capacity of 100 liters, and placed in each test mold immediately after the bibeam, and remained in the room for 24 hours. After demolding, curing was carried out in a constant temperature room at a temperature of 20 ± 3 ° C. and a humidity of 60 ± 5% to a predetermined measuring age to complete the preparation of the test body.

표 2는 본 발명의 실시예 및 비교예에 대한 역학성능 및 내화성능을 각각 측정한 결과를 나타낸 것이다.Table 2 shows the results of measuring the mechanical performance and the fire resistance performance of the Examples and Comparative Examples of the present invention, respectively.

[표 2] 본 발명의 실시예 및 비교예 측정결과Table 2 Example and Comparative Example Measurement Results of the Invention

측정항목Metric 실시예1Example 1 실시예2Example 2 비교예1Comparative Example 1 비교예2Comparative Example 2 비고Remarks 역 학 성 능  Mechanics performance 휨강도(MPa)Flexural strength (MPa) 18.918.9 20.420.4 ±7.1± 7.1 9.79.7 KS F 4042 참조See KS F 4042 부착강도(MPa)Adhesion Strength (MPa) 2.82.8 2.92.9 1.81.8 2.02.0 KS F 4042 참조See KS F 4042 직접인장강도(MPa)Direct tensile strength (MPa) 5.45.4 5.95.9 2.62.6 3.13.1 일본토목학회 참조See Japanese Society of Civil Engineers 직접인장변형율(%)Direct tensile strain (%) 1.31.3 3.73.7 0.020.02 0.040.04 일본토목학회 참조See Japanese Society of Civil Engineers 변형경화거동의 유무The presence of deformation hardening behavior U U radish radish 일본토목학회 참조See Japanese Society of Civil Engineers 멀티플크랙의 유무Multiple Cracks U U radish radish 일본토목학회 참조See Japanese Society of Civil Engineers 길이변화율(%)Length change rate (%) -0.02-0.02 -0.02-0.02 -0.08-0.08 -0.07-0.07 KS F 4042 참조See KS F 4042 내 화 성 능  Fireproof performance 열전도율 (W/m·K)Thermal Conductivity (W / mK) 0.4360.436 0.4340.434 1.8921.892 1.6741.674 KS F 4042 참조See KS F 4042 폭렬발생의 유무The presence of explosion radish radish U U 외관관찰Exterior observation 균열발생의 유무Presence of cracks radish radish U U 외관관찰Exterior observation 수열온도(℃)Hydrothermal temperature (℃) 189189 184184 405405 374374 썸머커플Summer Couple

즉, 실시예1 및 실시예2는 높은 휨강도와 인장강도를 보일 뿐만 아니라, 직접인장시험시 인장변형율이 1.3~3.7%로 비교예에 비해 탁월한 인장변형성능을 나타내며, 더욱이 인장하중하에서 초기균열이 발생한 후에도 응력과 함께 변형이 다시 증가하는 변형경화거동과 더불어 초기균열이 국소화되지 않고 무수한 미세균열로 분산되는 멀티플크랙을 안정적으로 발현하였다. 또한, 길이변화율은 -0.02% 정도로 KS F 4042(콘크리트구조물 보수용 폴리머시멘트모르터)의 기준인 ㅁ0.15%를 크게 만족하였다.That is, Examples 1 and 2 not only show high flexural strength and tensile strength, but also have a tensile strain of 1.3 to 3.7% in the direct tensile test, which shows excellent tensile strain compared to the comparative example, and furthermore, an initial crack under tensile load. Even after the occurrence, the strain hardening behavior that increases with stress again, and the initial crack was not localized, and multiple cracks dispersed in a myriad of microcracks were stably expressed. In addition, the rate of change of length was -0.02%, which satisfactorily satisfied ㅁ 0.15% of KS F 4042 (polymer cement motor for repairing concrete structures).

반면, 비교예1 및 비교예2는 본 발명의 실시예에 비해 휨강도, 부착강도, 직접인장강도 등의 역학성능이 매우 낮게 나타났으며, 특히 직접인장시험에서의 변형경화거동 및 멀티플크랙이 전혀 발생하지 않는 것으로 나타나 균열제어성능이 열악하다는 것을 확인하였다.On the other hand, Comparative Examples 1 and 2 showed very low mechanical performances such as bending strength, adhesion strength, and direct tensile strength compared to the examples of the present invention. It did not appear that it was confirmed that the crack control performance is poor.

한편, 내화성능을 비교·평가한 결과, 본 발명의 실시예1 및 실시예2의 열전도율은 각각 0.436W/m·K 및 0.434W/m·K로 일반콘크리트(약 2.0W/m·K 이상)의 약 1/5 수준이었으며, 비교예1 및 비교예2에 비해서도 열전도율이 매우 낮게 나타났다. 또한, RABT 가열곡선(30분 가열) 하에서의 가열실험 결과, 비교예1 및 비교예2는 도2 및 도3에 나타낸 바와 같이 가열중에 완전히 파괴되어 형상을 파악할 수 없거나, 또는 표면에 많은 균열이 발생하였다. 반면, 본 발명의 실시예1 및 실시예2는 가열 후에도 도 4에 나타낸 바와 같이 폭렬현상 및 균열이 전혀 발생하지 않았으며, 중앙부에서의 수열온도를 189~184℃ 이하로 제어할 수 있어 매우 우수한 내화성능을 확인하였다.On the other hand, as a result of comparing and evaluating the fire resistance performance, the thermal conductivity of Example 1 and Example 2 of this invention was 0.436W / m * K and 0.434W / m * K, respectively, and it is general concrete (about 2.0W / m * K or more). ) Was about 1/5 level, the thermal conductivity was very low compared to Comparative Example 1 and Comparative Example 2. In addition, as a result of the heating experiment under the RABT heating curve (30 minutes heating), Comparative Example 1 and Comparative Example 2 were completely destroyed during heating as shown in Figs. 2 and 3, so that the shape could not be grasped or many cracks occurred on the surface. It was. On the other hand, in Example 1 and Example 2 of the present invention, even after heating, no explosion and cracking occurred as shown in FIG. 4, and the hydrothermal temperature at the central part can be controlled to 189 to 184 ° C. or less, which is very excellent. Fire resistance was confirmed.

본 발명에 의하면 우수한 역학성능과 균열제어성능 등의 보수성능과 더불어 폭렬방지성능 및 차열성능 등의 내화성능을 겸비한 고인성 내화모르터의 제조가 가능하며, 이를 콘크리트구조물의 보수공사 또는 내화공사에 적용함으로서 구조물의 내구성능과 내화성능을 동시에 향상시킬 수 있는 내화피복·보수 겸용의 공법이 실현될 수 있다.According to the present invention, it is possible to manufacture a high toughness fireproof motor having fire resistance such as explosion prevention performance and heat shielding performance as well as repair performance such as excellent mechanical performance and crack control performance, and it is applied to repair or fireproofing of concrete structures. By doing so, a fireproof coating and repairing method that can simultaneously improve the durability and fire resistance of the structure can be realized.

따라서, 본 발명의 공법을 터널, 지하철, 지하공동구 등 SOC시설의 공사에 적용함으로서 보수공사와 내화피복공사를 한번에 해결할 수 있으며, 이를 통해 공사비용의 절감, 구조안전성의 향상, 구조물의 장수명화가 가능하게 된다. Therefore, by applying the method of the present invention to the construction of SOC facilities, such as tunnels, subways, underground joints, etc., repair work and fireproof coating work can be solved at once, thereby reducing construction costs, improving structural safety, and extending the life of structures. Done.

Claims (7)

삭제delete 규사 : 20~40중량%, 시멘트 : 20~30중량%, 플라이애시 : 5~15중량%, 실리카흄 : 0.1~1.0중량%, 탄산칼슘 : 3~10중량%, 중공세라믹 다공체 : 0.1~5중량%, CSA계 팽창재 : 1~4중량%, 분말수지 : 1~5중량%, 증점제 : 0.01~0.08중량%, 수축저감재 : 0.01~0.25중량%, 감수제 : 0.1~0.5중량%, 공기조정제 : 0.01~0.20중량%, 나머지는 물로 이루어진 조성비를 갖는 고인성 내화모르터 조성물에 있어서, Silica sand: 20-40 wt%, Cement: 20-30 wt%, Fly ash: 5-15 wt%, Silica fume: 0.1-1.0 wt%, Calcium carbonate: 3-10 wt%, Hollow ceramic porous body: 0.1-5 wt% %, CSA-based expander: 1 to 4% by weight, powder resin: 1 to 5% by weight, thickener: 0.01 to 0.08% by weight, shrinkage reducing agent: 0.01 to 0.25% by weight, water reducing agent: 0.1 to 0.5% by weight, air conditioner: In the high toughness refractory mortar composition having a composition ratio of 0.01 to 0.20% by weight, the remainder is water, 상기 조성비를 갖는 고인성 내화모르터 조성물 100용적부에 대하여 직경 : 26~100㎛, 길이 : 3~15mm, 인장강도 : 1,200~1,900MPa를 갖는 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부가 추가 투입된 것을 특징으로 하는 고인성 내화모르터 조성물. High-strength refractory mortar composition having a composition ratio of 0.95 to 1.80 parts by volume of high tension PVA (polyvinyl alcohol) fiber having a diameter of 26 to 100 µm, a length of 3 to 15 mm, and a tensile strength of 1,200 to 1,900 MPa High toughness refractory mortar composition, characterized in that the input. 2항에 있어서, The method of claim 2, 상기 고인성 내화모르터 조성물 100용적부에 대하여 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부와, 직경 : 12~50㎛, 섬유길이 : 6~15mm, 인장강도 : 2,200~3,000MPa를 갖는 고장력 PE(폴리에틸렌)섬유 0.05~0.70용적부 투입된 것임을 특징으로 하는 고인성 내화모르터 조성물.High tensile PVA (polyvinyl alcohol) fiber 0.95 ~ 1.80 parts by volume, fiber diameter: 12 ~ 50㎛, fiber length: 6 ~ 15mm, tensile strength: 2, 200 ~ 3,000MPa High toughness fire-resistant motor composition, characterized in that the PE (polyethylene) fiber 0.05 ~ 0.70 parts by volume. 콘크리트구조물의 열화부를 제거하고 고압수로 이물질을 제거하는 바탕처리단계;A ground treatment step of removing the deterioration of the concrete structure and removing foreign substances with high pressure water; 상기 열화부가 제거된 부분에 규사 : 20~40중량%, 시멘트 : 20~30중량%, 플라이애시 : 5~15중량%, 실리카흄 : 0.1~1.0중량%, 탄산칼슘 : 3~10중량%, 중공세라믹 다공체 : 0.1~5중량%, CSA계 팽창재 : 1~4중량%, 분말수지 : 1~5중량%, 증점제 : 0.01~0.08중량%, 수축저감재 : 0.01~0.25중량%, 감수제 : 0.1~0.5중량%, 공기조정제 : 0.01~0.20중량%, 나머지는 물로 이루어진 조성비를 갖는 고인성 내화모르터를 충전단계; 및Silica sand: 20 to 40% by weight, cement: 20 to 30% by weight, fly ash: 5 to 15% by weight, silica fume: 0.1 to 1.0% by weight, calcium carbonate: 3 to 10% by weight, hollow portion Ceramic porous body: 0.1-5% by weight, CSA-based expansion material: 1-4% by weight, powder resin: 1-5% by weight, thickener: 0.01-0.08% by weight, shrinkage reducing material: 0.01-0.25% by weight, water reducing agent: 0.1- 0.5% by weight, air conditioner: 0.01 ~ 0.20% by weight, the remaining step of filling a high toughness refractory motor having a composition consisting of water; And 상기 고인성 내화모르터가 경화하기 전에 피막수밀제를 도포하여 미장하는 미장마감단계;로 이루어지는 것을 특징으로 하는 콘크리트구조물의 내화피복 보수공법.A plastering finishing step of applying and coating the film watertight agent before curing the high toughness fireproof mortar. 제4항에 있어서, 상기 조성비를 갖는 고인성 내화모르터 조성물 100용적부에 대하여 직경 : 26~100㎛, 길이 : 3~15mm, 인장강도 : 1,200~1,900MPa를 갖는 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부가 추가 투입된 것을 특징으로 하는 콘크리트구조물의 내화피복 보수공법. The high tensile PVA (polyvinyl alcohol) fiber according to claim 4, having a diameter of 26 to 100 µm, a length of 3 to 15 mm, and a tensile strength of 1,200 to 1,900 MPa with respect to 100 parts of the high toughness refractory motor composition having the composition ratio. Repair method of fireproof coating of concrete structure, characterized in that the 0.95 ~ 1.80 volume part is added. 제4항 또는 제5항에 있어서, 상기 고인성 내화모르터 조성물 100용적부에 대하여 고장력 PVA(폴리비닐알콜)섬유 0.95~1.80용적부와, 직경 : 12~50㎛, 섬유길이 : 6~15mm, 인장강도 : 2,200~3,000MPa를 갖는 고장력 PE(폴리에틸렌)섬유 0.05~0.70용적부 투입된 것임을 특징으로 하는 콘크리트구조물의 내화피복 보수공 법.The high-strength refractory mortar composition according to claim 4 or 5, wherein the high tensile PVA (polyvinyl alcohol) fibers 0.95 ~ 1.80 volume, diameter: 12 ~ 50㎛, fiber length: 6 ~ 15mm, Tensile strength: Fireproof coating repairing method of concrete structure, characterized in that it is injected 0.05 ~ 0.70 parts by volume of high tensile PE (polyethylene) fiber having 2,200 ~ 3,000MPa. 제4항에 있어서, 상기 미장마감단계 후 방수성능과 미관을 보다 향상시키기 위하여 미장 표면에 변성실리콘계 수지를 도포하는 표면코팅단계를 더 포함함을 특징으로 하는 콘크리트구조물의 내화피복 보수공법.The method of claim 4, further comprising a surface coating step of applying a modified silicone-based resin on the surface of the plasterer to further improve the waterproofing performance and aesthetics after the plastering step.
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KR100917410B1 (en) 2009-06-09 2009-09-14 고광식 Polymer cement concrete composite, overlaying concrete pavement method, and repairing method for concrete pavement using the concrete composite
KR100950717B1 (en) * 2009-07-07 2010-03-31 웅진엔지니어링(주) Maintenance Method of Concrete Layer of Expansion Joint and Bridge Shoe
KR101000526B1 (en) * 2008-07-21 2010-12-14 (주)에이엠에스 엔지니어링 Manufacturing method of high-strength refractory and quake-proof panel using refractory and quake-proof mortar composition
KR101145871B1 (en) 2008-08-26 2012-05-15 한국세라믹기술원 Heat insulative and fire resistant mortar for spray coating
KR101193022B1 (en) 2010-03-23 2012-10-22 최홍식 A High Functional Rehabilitation Mortar
CN103979859A (en) * 2014-04-04 2014-08-13 马鞍山市恒毅机械制造有限公司 Fireproof lightweight partition plate and manufacturing method thereof
JP2014177393A (en) * 2013-02-18 2014-09-25 Ube Ind Ltd Profile restoring material, mortar composition, and mortar cured body
JP2014177394A (en) * 2013-02-18 2014-09-25 Ube Ind Ltd Repair method for concrete structure
CN104310885A (en) * 2014-10-10 2015-01-28 南安市国高建材科技有限公司 Environment-friendly autoclaved lightweight aerated concrete super-thin plate
CN106007522A (en) * 2016-05-23 2016-10-12 句容联众科技开发有限公司 Fiber-enhanced cement admixture
CN106760151A (en) * 2016-12-27 2017-05-31 明辨(天津)科技股份有限公司 A kind of building intelligence installing engineering lining
KR102398304B1 (en) * 2021-09-24 2022-05-17 주식회사 넷폼알앤디 Method of painting concrete structure having repairing layer for crack using putty
KR102398296B1 (en) * 2021-09-24 2022-05-17 주식회사 넷폼알앤디 Organic waterproof layer having repairing layer for crack of concrete structure using putty
KR102398289B1 (en) * 2021-09-24 2022-05-18 주식회사 넷폼알앤디 Repairing layer for crack of concrete structure using putty

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KR101000526B1 (en) * 2008-07-21 2010-12-14 (주)에이엠에스 엔지니어링 Manufacturing method of high-strength refractory and quake-proof panel using refractory and quake-proof mortar composition
KR101145871B1 (en) 2008-08-26 2012-05-15 한국세라믹기술원 Heat insulative and fire resistant mortar for spray coating
KR100917410B1 (en) 2009-06-09 2009-09-14 고광식 Polymer cement concrete composite, overlaying concrete pavement method, and repairing method for concrete pavement using the concrete composite
KR100950717B1 (en) * 2009-07-07 2010-03-31 웅진엔지니어링(주) Maintenance Method of Concrete Layer of Expansion Joint and Bridge Shoe
KR101193022B1 (en) 2010-03-23 2012-10-22 최홍식 A High Functional Rehabilitation Mortar
JP2014177393A (en) * 2013-02-18 2014-09-25 Ube Ind Ltd Profile restoring material, mortar composition, and mortar cured body
JP2014177394A (en) * 2013-02-18 2014-09-25 Ube Ind Ltd Repair method for concrete structure
CN103979859B (en) * 2014-04-04 2016-04-20 安徽吉思特智能装备有限公司 A kind of fire-proof light partition plate and preparation method thereof
CN103979859A (en) * 2014-04-04 2014-08-13 马鞍山市恒毅机械制造有限公司 Fireproof lightweight partition plate and manufacturing method thereof
CN104310885A (en) * 2014-10-10 2015-01-28 南安市国高建材科技有限公司 Environment-friendly autoclaved lightweight aerated concrete super-thin plate
CN106007522A (en) * 2016-05-23 2016-10-12 句容联众科技开发有限公司 Fiber-enhanced cement admixture
CN106760151A (en) * 2016-12-27 2017-05-31 明辨(天津)科技股份有限公司 A kind of building intelligence installing engineering lining
CN106760151B (en) * 2016-12-27 2020-06-19 深圳市华艺阳光装饰设计工程有限公司 Interior wallboard is used to building intelligence installation engineering
KR102398304B1 (en) * 2021-09-24 2022-05-17 주식회사 넷폼알앤디 Method of painting concrete structure having repairing layer for crack using putty
KR102398296B1 (en) * 2021-09-24 2022-05-17 주식회사 넷폼알앤디 Organic waterproof layer having repairing layer for crack of concrete structure using putty
KR102398289B1 (en) * 2021-09-24 2022-05-18 주식회사 넷폼알앤디 Repairing layer for crack of concrete structure using putty

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