KR101709603B1 - Mortar Comprising the Surface Compacting Admixture to Repair Underwater Concrete Structure and Underwater Repairing Method of Concrete Structure Therewith - Google Patents

Mortar Comprising the Surface Compacting Admixture to Repair Underwater Concrete Structure and Underwater Repairing Method of Concrete Structure Therewith Download PDF

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KR101709603B1
KR101709603B1 KR1020160079378A KR20160079378A KR101709603B1 KR 101709603 B1 KR101709603 B1 KR 101709603B1 KR 1020160079378 A KR1020160079378 A KR 1020160079378A KR 20160079378 A KR20160079378 A KR 20160079378A KR 101709603 B1 KR101709603 B1 KR 101709603B1
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underwater
mortar
composition
repair
water
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남기태
윤병권
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주식회사 합동종합건설
(주)노블씨엔티
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/30—Oxides other than silica
    • C04B14/303—Alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/141—Slags
    • C04B18/142—Steelmaking slags, converter slags
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/14—Waste materials; Refuse from metallurgical processes
    • C04B18/146—Silica fume
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2676—Polystyrenes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00—Repair of damaged foundations or foundation structures
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0061—Production methods for working underwater
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
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Abstract

The present invention relates to an underwater concrete repair technique and, more particularly, to a surface-compacting composition for underwater repair mortar, a rapid-hardening mortar composition for surface compacting and underwater repair having a preferable composition of the surface compacting agent and a rapid-hardening binder, and an underwater concrete repair method using the underwater repair mortar in a preferable manner. The surface-compacting composition for the underwater repair mortar according to the present invention includes: styrene-butadiene-rubber (SBR) powder with a particle size of 10 micrometers or less; active alumina gel with a porosity of 65% to 80% and a granular particle size of 0.1 to 0.3 mm; and calcined tobermorite powder obtained by a tobermorite hydrate produced by hydrothermal synthesis being heat-treated at a temperature of 600 to 800 degrees Celsius and then ground to be given a fineness of at least 4,000 square centimeters per gram. The rapid-hardening mortar composition for surface compacting and underwater repair according to the present invention is a dry mortar composition mixed with surface-compacting composition for cement mixture, rapid-hardening binder, and fine aggregate included and calcium aluminate mineral, potassium phosphate, wollastonite, and cement are included as the rapid-hardening binder. According to the underwater concrete repair method according to the present invention, a deteriorated part of an underwater concrete structure is removed and then filling of the rapid-hardening mortar composition for surface compacting is performed.

Description

속경형 표면 수밀화 수중 보수 모르타르 조성물과 이를 이용한 콘크리트 수중 보수공법{Mortar Comprising the Surface Compacting Admixture to Repair Underwater Concrete Structure and Underwater Repairing Method of Concrete Structure Therewith}TECHNICAL FIELD [0001] The present invention relates to a water-repellent underwater mortar composition and a concrete underwater repair method using the same,

본 발명은 콘크리트 수중 보수 기술에 관한 것으로, 더욱 상세하게는 수중 보수 모르타르에 혼입되어 표면 수밀화 효과를 이끌어 내는 표면 수밀화제 조성물과, 이러한 표면 수밀화제와 속경성 결합재를 바람직하게 조성한 속경형 표면 수밀화 수중 보수 모르타르 조성물, 그리고 이러한 수중 보수 모르타르를 바람직하게 이용한 콘크리트 수중 보수공법에 관한 것이다.  The present invention relates to a concrete underwater repairing technique, and more particularly, to a surface water-tightening composition which is mixed with an underwater repair mortar to bring about a surface water-milling effect, and a quick- Mild waterborne mortar composition, and a concrete underwater repair method using such underwater repair mortar preferably.

콘크리트는 건축 토목 공사에서 광범위하게 사용하고 있지만 내구성 부족이 지속적으로 문제되고 있다. 내구성 문제 중의 하나로 부식, 탈락, 중성화, 강도저하 등의 콘크리트 열화가 있는데, 콘크리트에 열화가 발생하면 조속하게 열화된 부위를 보수할 필요가 있다. 특히 수중 콘크리트 구조물의 경우에는 열화부위에서 수분 침투가 쉽게 이루어져 내구성 저하를 가속화하기 때문에 신속한 보수가 필요하다. Concrete is widely used in civil engineering works, but lack of durability is constantly a problem. One of the durability problems is the deterioration of concrete such as corrosion, dropout, neutralization, and degradation of strength. When deterioration occurs in concrete, it is necessary to repair the deteriorated part quickly. In particular, in the case of an underwater concrete structure, water penetration at the deteriorated part is easily performed, and the durability is rapidly lowered, so rapid repair is required.

통상 열화 콘크리트의 보수는 콘크리트 구조물에서 열화부위를 제거한 후 보수 모르타르를 충진하는 방식으로 진행한다. 보수 모르타르는 모재(콘크리트 구조물)와의 표면 접착성, 모재와의 일체적인 안정성, 내구성 등이 요구되며, 수중 보수 모르타르는 더 나아가 수밀성, 수중 불분리성, 수분 저항성 등이 더 요구된다.Typically, deterioration concrete is repaired by removing the deteriorated part from the concrete structure and filling the concrete with the repair mortar. The maintenance mortar is required to have surface adhesion with base material (concrete structure), integral stability with base material, durability, etc. Water under repair mortar is further required to have water tightness, water insolubility and moisture resistance.

수중 보수 모르타르의 수중 불분리성은 자체 유동성에 의해 다짐가능한 소요의 워커빌리티와 재료의 흩어짐 방지를 위한 점성 및 재료분리 저항성으로 평가되며, 이러한 성능은 일반적으로 증점제나 수중 불분리제를 이용하여 부여한다. 그러나 증점제나 수중 불분리제는 모르타르의 강도를 떨어뜨리는 문제가 있다.
Underwater insolubility of underwater repair mortar is evaluated by its own workability which can be compromised by its own fluidity, and its viscosity and material separation resistance to prevent material scattering, and this performance is usually given by using thickener or underwater insolubilizer. However, thickener or underwater fire-cracking agent has a problem of lowering strength of mortar.

특허 제10-1415539호Patent No. 10-1415539 특허 제10-1436780호Patent No. 10-1436780 특허 제10-1609697호Patent No. 10-1609697

본 발명은 종래 수중 보수 모르타르를 개선하고자 개발된 것으로서, 수중 보수 모르타르에 혼입될 때 효과적인 강도 발현은 물론 길이변화율, 염화물이온 침투저항성, 습기투과 저항성에서 우수한 성능 발현을 통해 표면 수밀화 효과를 이끌어 낼 수 있는 새로운 수중 보수 모르타르용 표면 수밀화제 조성물을 제공하는데 기술적 과제가 있다.The present invention has been developed to improve the water-borne mortar of the prior art. The present invention is directed to a water-borne mortar which is capable of exhibiting effective strength when mixed with underwater repair mortar, exhibiting excellent performance in a rate of change in length, chloride ion penetration resistance and moisture permeation resistance, There is a technical problem to provide a surface watertightening composition for a new underwater repair mortar capable of being treated.

또한 본 발명은 수중 보수 모르타르용 표면 수밀화제와 함께 속경성 결합재를 바람직하게 사용한 속경형 표면 수밀화 수중 보수 모르타르 조성물과 이를 바람직하게 이용한 콘크리트 수중 보수공법을 제공하고자 한다.
The present invention also provides a water-hardenable mortar composition using a quick-setting type surface-water-immersed waterproofing mortar and a concrete underwater repairing method using the same, together with a surface water-tightening agent for underwater repair mortar.

상기한 기술적 과제를 해결하기 위해 본 발명은 수중 보수 모르타르용 표면 수밀화제과 이를 바람직하게 포함하는 속경형 표면 수밀화 보수 모르타르 조성물, 그리고 그 수중 보수 모르타르를 바람직하게 이용한 콘크리트 수중 보수공법을 제공한다.In order to solve the above-mentioned technical problems, the present invention provides a surface water-tightening agent for underwater repair mortar, a quick-release surface water-retentive repair mortar composition preferably comprising the same, and a concrete underwater repair method using the underwater repair mortar.

본 발명에 따른 수중 보수 모르타르용 표면 수밀화제 조성물은, 입도가 10㎛ 이하인 SBR(Styrene-Butadiene-Rubber) 분말; 기공율이 65~80%로 0.1~0.3mm의 과립 입도를 가지는 활성 알루미나겔; 수열합성에 의하여 제조된 토버모라이트 수화물을 600~800℃의 온도에서 열처리한 후, 4,000㎠/g 이상의 분말도를 가지도록 분쇄한 하소 토버모라이트(calcined tobermorite) 분말;을 포함하여 조성되는 것을 특징으로 한다.The surface water-tightening composition for an underwater repair mortar according to the present invention comprises SBR (Styrene-Butadiene-Rubber) powder having a particle size of 10 m or less; Activated alumina gel having a granular particle size of 0.1 to 0.3 mm with a porosity of 65 to 80%; And calcined tobermorite powder obtained by heat treating the tobermorite hydrate prepared by hydrothermal synthesis at a temperature of 600 to 800 ° C. and pulverizing the powder to have a powderity of 4,000 cm 2 / g or more .

본 발명에 따른 속경형 표면 수밀화 수중 보수 모르타르 조성물은, 시멘트 혼합물용 표면 수밀화제 조성물, 속경성 결합재, 잔골재를 포함하여 배합되는 모르타르 조성물로서, 속경성 결합재로 칼슘알루미네이트 광물, 인산칼륨, 규회석, 시멘트를 포함하되 칼슘알루미네이트 광물과 인산칼륨이 1:0.7~1.0의 중량비로 구성되면서 결합재 100중량부에 대하여 30~80중량부 포함되는 것을 특징으로 한다.The present invention relates to a mortar composition comprising a surface water-tightening composition for a cement admixture, a quick-setting binder and a fine aggregate, wherein the quick-setting water-immersed underwater masonry mortar composition according to the present invention is a mortar composition comprising a calcium aluminate mineral, potassium phosphate, And cement, wherein the calcium aluminate mineral and potassium phosphate are contained in a weight ratio of 1: 0.7 to 1.0, and are contained in an amount of 30 to 80 parts by weight based on 100 parts by weight of the binder.

본 발명에 따른 콘크리트 수중 보수공법은, 수중 콘크리트 구조물의 열화된 부분을 제거한 후, 속경형 표면 수밀화 수중 보수 모르타르 조성물을 충전 시공하는 것을 특징으로 한다.
The concrete underwater repairing method according to the present invention is characterized in that a deteriorated portion of an underwater concrete structure is removed, and then a repair mortar composition is immersed in a quick-setting surface water-immersion waterproof mortar composition.

본 발명에 따르면 다음과 같은 효과를 기대할 수 있다.According to the present invention, the following effects can be expected.

첫째, 본 발명에 따른 표면 수밀화제는 수중 보수 모르타르에 혼입될 때, 수중 강도는 물론, 길이변화율, 염화물이온 침투저항성, 습기투과 저항성 등 표면 수밀화 효과에서 우수한 성능을 이끌어 내며, 이로써 수중 보수 공사에 유리하게 적용할 수 있다. First, when the surface water-tightening agent according to the present invention is incorporated into an underwater repair mortar, excellent performance is obtained in the surface water milling effect such as the rate of change in length, rate of change in length, chloride ion penetration resistance, moisture permeation resistance, . ≪ / RTI >

둘째, 본 발명에 따른 수중 보수 모르타르 조성물은 속경성 결합재를 사용하여 속경성을 발현함을 물론 표면 수밀화제를 사용하여 길이변화율, 염화물이온 침투저항성, 습기투과 저항성 등 우수한 표면 수밀화 효과를 발현하므로, 본 발명에 따른 수중 보수 모르타르를 수중 열화 콘크리트 구조물을 보수할 경우 고내구성 발현을 기대할 수 있다.
Second, the underwater repair mortar composition according to the present invention expresses a quick-hardening property by using a quick-setting binder and exhibits an excellent surface water-milling effect such as a rate of change in length, a chloride ion penetration resistance, a moisture permeation resistance and the like by using a surface water- , And when the underwater repair mortar according to the present invention is remodeled underwater deterioration concrete structure, high durability can be expected.

도 1은 본 발명에 다른 콘크리트 수중 보수공법에 대한 시공순서도이다.FIG. 1 is a construction flowchart of a concrete underwater repair method according to the present invention.

본 발명은 콘크리트 수중 보수 기술에 관한 것으로서, 수중 보수 모르타르에 혼입되어 표면 수밀화 효과를 이끌어 내는 표면 수밀화제 조성물과, 이러한 표면 수밀화제를 포함하는 속경형 표면 수밀화 보수 모르타르 조성물, 그리고 그 모르타르 조성물을 이용한 콘크리트 수중 보수공법에 관한 것이다.TECHNICAL FIELD The present invention relates to a concrete water underwater repairing method, and more particularly, to a surface water-tightening composition which is mixed with underwater repair mortar to bring about a surface water-milling effect, a quick-setting surface water-retentive repair mortar composition containing such surface water- And a method for repairing concrete underwater using the method.

본 발명에 따른 수중 보수 모르타르용 표면 수밀화제 조성물은, 입도가 10㎛ 이하인 SBR(Styrene-Butadiene-Rubber) 분말; 기공율이 65~80%로 0.1~0.3mm의 과립 입도를 가지는 활성 알루미나겔; 수열합성에 의하여 제조된 토버모라이트 수화물을 600~800℃의 온도에서 열처리한 후, 4,000㎠/g 이상의 분말도를 가지도록 분쇄한 하소 토버모라이트(calcined tobermorite) 분말;을 포함하여 조성되는 것을 특징으로 한다. 이때 SBR 분말 0.2~1.2 중량부; 활성 알루미나겔 1.0~3.0중량부; 하소 토버모라이트 분말 1.5~4.5중량부;로 조성하는 것이 바람직하다.The surface water-tightening composition for an underwater repair mortar according to the present invention comprises SBR (Styrene-Butadiene-Rubber) powder having a particle size of 10 m or less; Activated alumina gel having a granular particle size of 0.1 to 0.3 mm with a porosity of 65 to 80%; And calcined tobermorite powder obtained by heat treating the tobermorite hydrate prepared by hydrothermal synthesis at a temperature of 600 to 800 ° C. and pulverizing the powder to have a powderity of 4,000 cm 2 / g or more . 0.2 to 1.2 parts by weight of SBR powder; 1.0 to 3.0 parts by weight of activated alumina gel; And 1.5 to 4.5 parts by weight of a calcined tomborite powder.

SBR 분말은 모르타르에 혼입되어 경화 전에는 유동성 증대, 작업시간 증대 등 작업성 개선 효과와 함께 수중 표면 접착력을 발휘하고, 경화 후에는 유해이온 침투저항성 증대, 방수성 증대 등의 수밀성 확보에 기여한다. SBR 분말은 10㎛ 이하의 입도를 가지는 것으로 사용하는데, 그래야 모르타르 물배합 과정에서 고르게 분산되어 있다가 모르타르 경화과정에서 건조되면서 미세 입자로 형성되어 모르타르의 경화체를 치밀화한다. SBR 분말은 0.2~1.2중량부 사용하는데, 0.2중량부 미만이면 모르타르 경화체의 치밀화를 이루기 어렵고 1.2중량부 초과하면 모르타르의 초기 강도 저하에 영향을 미친다. The SBR powder is incorporated into the mortar to improve fluidity before curing and to improve workability such as increased working time, and to exhibit adhesion on the surface of the water. After curing, it contributes to ensuring watertightness such as increased resistance to penetration of harmful ions and increase in water resistance. The SBR powder is used with a particle size of 10 μm or less so that it is uniformly dispersed in the mortar water compounding process and dried in the mortar hardening process to be formed into fine particles to densify the hardened product of the mortar. The SBR powder is used in an amount of 0.2 to 1.2 parts by weight. If the amount is less than 0.2 parts by weight, the mortar hardened body is hardly densified. If the amount is more than 1.2 parts by weight, the initial strength of the mortar is lowered .

활성 알루미나겔은 충진재로서 모르타르에 혼입되어 경화 전에는 미립자인 SBR 분말과 하소 토버모라이트 분말을 흡착 수용하여 균일한 분산에 기여하고, 경화 후에는 유해물질을 흡착하는 역할을 한다. 활성 알루미나겔은 기공율이 65~80%이고 0.1~0.3mm의 과립 입도를 가지는 것으로 마련하는 것이 바람직하다. 활성 알루미나겔은 1.0~3.0중량부 사용하는데 1.0중량부 미만이면 유해물질에 대한 흡착성능이 떨어지고 3.0중량부 초과하면 모르타르의 초기 굳기전 물성(유동성 등)에 영향을 미칠 수 있다. The activated alumina gel is mixed with the mortar as a filler to adsorb and adsorb fine particles of SBR powder and calcined tobermorite powder before curing to contribute to uniform dispersion and to adsorb toxic substances after curing. The activated alumina gel preferably has a porosity of 65 to 80% and a granular particle size of 0.1 to 0.3 mm. The activated alumina gel is used in an amount of 1.0 to 3.0 parts by weight. If the amount is less than 1.0 part by weight, the adsorption performance against harmful substances is deteriorated. If the amount is more than 3.0 parts by weight, the properties before the initial solidification of the mortar (fluidity, etc.) may be affected.

하소 토버모라이트 분말은 나노사이즈의 수화물 구조를 가져 물과 접촉하면 초기에 빨리 재수화함으로써 모르타르의 조기 강도 증진에 기여하며, 나아가 재수화물은 전체 미세기공 및 모세관에 분포되면서 조직을 치밀하게 한다. 하소 토버모라이트 분말은 토버모라이트 수화물을 600~800℃의 온도에서 열처리한 후 4,000㎠/g 이상의 분말도를 가지도록 분쇄하여 제조하며, 여기서 토버모라이트 수화물은 산화칼슘과 실리케이트 광물을 원료로 하여 CaO/SiO2의 몰비(molar ratio)가 1.3~1.6이 되도록 배합한 후, 약 10기압, 약 180℃의 조건에서 수열합성공정을 통해 섬유상 구조를 가지도록 제조하면 된다. 하소 토버모라이트 분말은 1.5~4.5중량부 사용하는데, 1.5중량부 미만이면 모르타르 조기강도 증진이 미미하고 4.5중량부 초과하면 작업시간 확보에 어렵다.
The calcined tomborite powder has a nano-sized hydrate structure, and when it comes into contact with water, it re-hydrates early, thereby contributing to the improvement of the early strength of the mortar. Furthermore, rehydration is distributed in the entire micropores and capillaries, The calcined tomborite powder is prepared by calcining tobermoryite hydrate at a temperature of 600 to 800 ° C and then pulverizing it to have a powderity of not less than 4,000 cm 2 / g, wherein the tobermorite hydrate is a mixture of calcium oxide and silicate minerals The molar ratio of CaO / SiO2 is adjusted to be 1.3 to 1.6, and then a fibrous structure is formed through hydrothermal synthesis at about 10 atm and about 180 ° C. The amount of the calcined tomborite powder is 1.5 to 4.5 parts by weight. If the amount is less than 1.5 parts by weight, the early strength improvement of the mortar is insignificant. If the amount is more than 4.5 parts by weight, it is difficult to secure the working time.

이상 살펴본 표면 수밀화제 조성물은 속경성 결합재 및 잔골재와 바람직하게 조성하여 수중 보수 모르타르로 배합할 수 있다. 나아가 수중 불분리제, 발수제, 유동화제, 증점제 중에서 하나 이상의 첨가제를 더 혼입하여 작업성과 수밀성을 더욱 개선할 수 있으며, 수중 불분리제, 발수제, 유동화제, 증점제는 통상적으로 사용하는 범위에서 사용하면 된다. 표면 수밀화제는 속경성 결합재 100중량부에 대하여 1~20중량부 사용하는데, 1중량부 미만이면 표면 수밀화 효과가 미미하고, 20중량부 초과하면 모르타르의 초기 강도 저하 및 유동성 저하에 영향을 미친다.The above-mentioned surface water-tightening composition can be preferably formulated with a quick-setting binder and a fine aggregate, and then mixed with an underwater repair mortar. Further, it is possible to further improve the workability and watertightness by further incorporating at least one additive selected from the group consisting of an underwater dispersing agent, a water repellent agent, a fluidizing agent and a thickening agent. The underwater dispersing agent, water repellent agent, do. The surface water-tightening agent is used in an amount of 1 to 20 parts by weight based on 100 parts by weight of the quick-setting binder. When the amount is less than 1 part by weight, the effect of surface water milling is insignificant, while when exceeding 20 parts by weight, .

수중 보수 모르타르에서 속경성 결합재는 수중에서의 신속한 작업을 고려한 것는데, 칼슘알루미네이트 광물, 인산칼륨, 규회석, 시멘트를 포함하도록 구성한다. 나아가 강도 등 물성을 더욱 개선하기 위해 필요에 따라 실리카흄, 고로슬래그 미분말, 플라이애쉬 중에서 하나 이상 더 포함하는 것도 가능하다.In underwater repair mortars, quick-setting binders are designed to include rapid working in water, including calcium aluminate minerals, potassium phosphate, wollastonite, and cement. Further, in order to further improve physical properties such as strength, it is possible to further include at least one of silica fume, blast furnace slag fine powder and fly ash as necessary.

속경성 결합재에서 칼슘알루미네이트 광물과 인산칼륨은 조기강도 발현, 내산성 개선을 위한 재료가 되는데, 칼슘알루미네이트 광물:인산칼륨은 1:0.7~1.0의 중량비로 구성되면서 속경성 결합재 100중량부에 대하여 30~80중량부 포함되도록 하는 것이 바람직하다. 이 범위 미만이면 조기 강도 발현 내산성 개선 효과가 미약하고, 이 범위를 초과하면 빠른 경화 특성으로 인해 작업시간을 확보하기 어렵다.The calcium aluminate mineral and potassium phosphate in the quick hard binder are materials for improving the early strength development and improving the acid resistance. The calcium aluminate mineral: potassium phosphate is constituted at a weight ratio of 1: 0.7 ~ 1.0, and 100 parts by weight of the quick hard binder Preferably 30 to 80 parts by weight. If it is less than this range, the effect of improving the acid resistance of early strength development is insufficient, and if it exceeds this range, it is difficult to secure the working time due to quick curing characteristics.

규회석은 침상 형태의 분말인데, 화학적으로 활성이 낮고 물에 작 녹지 않기에 내구성 개선 및 강도 향상에 기여하는 충전재가 된다. 규회석은 분말도가 1,800~3,000㎠/g이고 섬유상에서 평균 길이:직경의 비가 12:1 이상인 것이 바람직한데, 이러한 특징의 규회석은 에어젯밀을 사용하여 재료투입 압력 0.7~0.8MPa, 분쇄압력 0.3~0.5MPa, 재료투입속도 50~100kg/h를 유지하는 조건에서 분쇄하면 제조할 수 있다. 규회석은 분말도가 1,800㎠/g 미만이면 충전이 치밀화되지 못하고 3,000㎠/g 초과하면 섬유상 침상구조가 파괴되어 강도, 내구성 개선 및 균열 방지의 효과가 저하되며, 또한 섬유상 평균길이:직경의 비가 최소 12:1 이상이어야 모르타르 구조체를 채워줌으로써 인장강도 향상 및 균열 방지에 기여할 수 있다. 규회석은 결합재 100중량부에 대하여 5~15중량부 포함되도록 하는 것이 바람직한데, 이 범위에서 효과적인 성능발현이 기대된다.Wollastonite is a needle-shaped powder, which is chemically active and does not dissolve in water, thereby contributing to improving durability and strength. It is preferable that the wollastonite has a powder degree of 1,800 to 3,000 cm 2 / g and an average length to diameter ratio of 12: 1 or more on the fiber. The wollastonite having such characteristics is obtained by using an air jet mill at a material input pressure of 0.7 to 0.8 MPa, 0.5 MPa, and a material feed rate of 50 to 100 kg / h. If wollastonite is less than 1,800 cm 2 / g, the filling is not densified. If the wollastonite is more than 3,000 cm 2 / g, the fibrous needle structure is destroyed and the strength, durability and crack prevention effect are decreased. 12: 1 or more to fill the mortar structure, thereby contributing to enhancement of tensile strength and prevention of cracking. The wollastonite is preferably contained in an amount of 5 to 15 parts by weight based on 100 parts by weight of the binder. Effective performance is expected in this range.

본 발명에 따른 수중 보수 모르타르는 속경성 결합재와 표면 수밀화제를 포함하여 배합하기 때문에, 속경성과 함께 유해이온 침투저항성, 수분저항성, 내마모성, 수중 표면 접착성 등에서 우수한 성능을 발휘하며, 이로써 수중 열화 콘크리트 구조물의 보수에 매우 유리하게 활용할 수 있을 것이다. 도 1은 수중 열화 콘크리트 구조물의 보수공법을 보여주는데, 보는 바와 같이 치핑하여 열화부를 제거한 후 세척하여 수중 보수 모르타르를 단면복구, 패칭, 그라우트 등의 형태로 충전 시공하면 되며, 필요에 따라 수중 보수 모르타르를 충전 시공하기 전에 보강재를 설치할 수 있다.
Since the underwater repair mortar according to the present invention is blended with a quick-setting binder and a surface water-tightening agent, it exhibits excellent performance in resistance to penetration of harmful ions, moisture resistance, abrasion resistance and underwater surface adhesion as well as fast- It can be very advantageously used for repairing concrete structures. FIG. 1 shows a repair method of a deterioration concrete structure in water. As shown in FIG. 1, the repair mortar can be charged in the form of repairing, patching, grouting, etc., Stiffeners can be installed before charging.

이하에서는 시험예에 의거하여 본 발명을 상세히 살펴본다. 다만, 아래의 시험예는 본 발명을 예시하기 위한 것일 뿐이며, 본 발명의 범위가 이로써 한정되는 것은 아니다.Hereinafter, the present invention will be described in detail based on a test example. However, the following test examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

[시험예] 속경형 표면 수밀화 수중 보수 모르타르[Test example] Fast-acting surface mortar Water-repellent mortar

1. 표면 수밀화제1. Surface water tightening agent

아래 [표 1]과 같은 재료를 준비하여 [표 2]과 같은 조성으로 표면 수밀화제를 제조하였다.The following materials were prepared as shown in [Table 1], and a surface water-tightening agent having the composition as shown in [Table 2] was prepared.

표면 수밀화제 재료 특성Surface water tightening material properties 구 분division 특성characteristic SBR 분말SBR powder 평균입도 7.5㎛, 결합 스티렌 함량 28%Average particle size 7.5 mu m, bound styrene content 28% 활성 알루미나겔Activated alumina gel 기공율78%, 과립 평균입도0.17㎜Porosity 78%, granule average particle size 0.17 mm 하소 토버모라이트Hazel Toomolite 산화칼슘과 실리케이트 광물을 CaO/SiO2의 몰비가 1.4가 되도록 배합한 후 10기압, 180℃ 조건에서 수열합성. 3일 후 600~800℃에서 열처리한 다음 7,800㎠/g 분말도를 가지도록 분쇄하여 제조Calcium oxide and silicate minerals were mixed in a molar ratio of CaO / SiO 2 of 1.4 and hydrothermal synthesis was carried out at 10 atm and 180 ℃. After 3 days, it was heat-treated at 600 to 800 ° C and then pulverized to have a powderiness degree of 7,800 cm 2 / g

표면 수밀화제 조성(중량부)Surface watertightening agent composition (parts by weight) 구 분division 실시예1Example 1 실시예2Example 2 실시예3Example 3 비교예1Comparative Example 1 비교예2Comparative Example 2 SBR 분말SBR powder 0.50.5 1.01.0 1.01.0 -- -- 활성 알루미나겔Activated alumina gel 1.51.5 2.02.0 2.02.0 -- 3.03.0 하소 토버모라이트Hazel Toomolite 2.02.0 3.03.0 3.03.0 -- -- 소계sub Total 4.04.0 6.06.0 6.06.0 -- 3.03.0

2. 모르타르 배합2. Mortar formulation

아래 [표 3]과 같은 재료를 준비하여 [표 4]와 같은 조성으로 건조 모르타르(물배합 이전)를 배합하였으며, 이러한 건조 모르타르에 물결합재비 14%로 물배합하였다.The materials shown in Table 3 below were prepared and dry mortar (before water mixing) was compounded in the composition as shown in Table 4, and water was added to the dry mortar at a water content of 14%.

모르타르 재료 특성Mortar material characteristics 구 분division 특 성Characteristics 칼슘알루미네이트 광물Calcium aluminate mineral CaO·Al2O3 함량70%CaO · Al 2 O 3 content 70% 인산칼륨Potassium phosphate K4P2O7함량 99%, PH10.6K 4 P 2 O 7 content 99%, PH 10.6 규회석Wollastonite 분말도 2,800㎠/g, 평균 길이: 직경 비=13:1Powder of 2,800 cm < 2 > / g, average length: diameter ratio = 13: 1 시멘트cement 보통 포틀랜드 시멘트Usually Portland Cement 고로슬래그Blast furnace slag 비중 2.9, 분말도 4, 200㎠/gSpecific gravity: 2.9, Powder figure: 4, 200㎠ / g 잔골재Fine aggregate 5호 규사, 6호 규사 1:1 혼합No. 5 Silica, No. 6 Silica 1: 1 Mixture 첨가제additive 수중 불분리제:유동화제:발수제:증점제=1:0.5:0.5:0.5(중량비)Water-insoluble agent: fluidizing agent: water repellent agent: thickener = 1: 0.5: 0.5: 0.5 (weight ratio)

건조 모르타르 배합(중량부)Dry mortar combination (parts by weight) 구 분division 실시예1Example 1 실시예2Example 2 실시예3Example 3 비교예1Comparative Example 1 비교예2Comparative Example 2 속경성
결합재Rapid hardening
Binders 칼슘알루미네이트 광물: 인산칼륨Calcium aluminate mineral: potassium phosphate 1:0.91: 0.9 1:0.91: 0.9 1:0.71: 0.7 1:0.91: 0.9 1:0.91: 0.9 칼슘알루미네이트 광물Calcium aluminate mineral 3030 3030 3030 3030 4040 인산칼륨Potassium phosphate 2727 2727 2121 2727 3636 규회석Wollastonite 1010 1010 55 1010 -- 시멘트cement 2323 2323 3434 2323 1414 고로슬래그Blast furnace slag 1010 1010 1010 1010 1010 소계sub Total 100100 100100 100100 100100 100100 표면 수밀화제Surface water tightening agent 4.04.0 6.06.0 6.06.0 -- 3.03.0 첨가제additive 3.03.0 3.03.0 3.03.0 3.03.0 3.03.0 잔골재Fine aggregate 100100 100100 100100 100100 100100 합계Sum 207207 209209 209209 203203 206206

3. 모르타르의 특성3. Characteristics of Mortar

물배합된 모르타르에 압축강도, 휨강도, 접착강도, 길이변화율, 염화물이온침투저항성, 습기투과저항성, 흡수율을 조사하였으며, 그 결과 아래 [표 5]와 같은 결과를 나타냈다.The compressive strength, bending strength, adhesive strength, length change rate, chloride penetration resistance, moisture permeation resistance and water absorption rate of the mortar mixed with water were investigated and the results are as shown in Table 5 below.

모르타르 특성Mortar characteristics 구 분division 실시예1Example 1 실시예2Example 2 실시예3Example 3 비교예1Comparative Example 1 비교예2Comparative Example 2 플로우(㎜)Flow (mm) 118118 124124 125125 130130 128128 재료분리Material separation 없음none 없음none 없음none 없음none 없음none 압축강도(N/㎟)Compressive strength (N / mm2) 기중3일3 days 26.626.6 32.232.2 25.725.7 13.113.1 15.215.2 기중28일Day 28 48.848.8 56.556.5 47.547.5 30.530.5 33.733.7 수중3일3 days underwater 24.524.5 31.431.4 23.223.2 12.412.4 14.814.8 수중28일Underwater 28 days 45.445.4 52.152.1 42.842.8 28.828.8 31.431.4 휨강도(N/㎟)Bending strength (N / mm2) 기중3일3 days 4.34.3 5.55.5 4.14.1 2.32.3 2.82.8 기중28일Day 28 11.411.4 12.212.2 10.810.8 7.27.2 8.98.9 수중3일3 days underwater 3.83.8 5.05.0 3.73.7 2.12.1 2.62.6 수중28일Underwater 28 days 9.89.8 10.610.6 8.68.6 6.56.5 7.77.7 접착강도(N/㎟)Adhesive strength (N / mm 2) 기중3일3 days 1.71.7 2.02.0 1.51.5 1.01.0 1.21.2 기중28일Day 28 2.12.1 2.32.3 1.91.9 1.51.5 1.61.6 수중3일3 days underwater 1.51.5 1.71.7 1.41.4 0.90.9 1.11.1 수중28일Underwater 28 days 1.81.8 2.02.0 1.71.7 1.41.4 1.51.5 길이변화율(%)Length change rate (%) -0.03-0.03 -0.02-0.02 -0.05-0.05 -0.12-0.12 -0.08-0.08 염화물이온침투저항성(Coulombs)Chloride ion penetration resistance (Coulombs) 234234 152152 212212 11081108 940940 습기투과저항성(Sd)mMoisture permeation resistance (S d ) m 0.50.5 0.20.2 0.50.5 1.81.8 1.51.5 흡수율(%)Absorption Rate (%) 2.62.6 1.81.8 3.23.2 8.28.2 7.57.5

위의 [표 5]에서 보는 바와 같이 본 발명에 따른 표면 수밀화제를 혼입한 실시예1,2,3은 표면 수밀화제를 혼입하지 아니한 비교예1 및 활성 알루미나겔만을 표면 수밀화제로 혼입한 비교예2와 비교할 때, 수중 압축강도와, 수중 휨강도, 수중 접착강도는 물론 길이변화율, 염화물이온 침투저항성, 습기투과저항성, 흡수율에서 우수한 성능을 나타냈다. 특히 실시예2에서 가장 우수한 성능을 나타냈다. 이와 같은 결과에 따라 본 발명에 따른 표면 수밀화제는 수중 보수 모르타르에 혼입하면 효과적인 강도 발현과 함께 표면 수밀화 효과를 이끌어 낸다고 할 수 있다.As shown in Table 5, in Examples 1, 2, and 3 in which the surface water-tightening agent according to the present invention was incorporated, Comparative Example 1 in which the surface water-tightening agent was not incorporated, and Comparative Example 1 in which only the activated alumina gel was mixed with the surface water- Compared with Example 2, it exhibited excellent performance in underwater compressive strength, underwater bending strength, underwater bond strength as well as length change rate, chloride ion penetration resistance, moisture permeation resistance and water absorption. In particular, it showed the best performance in Example 2. As a result, when the surface water-tightening agent according to the present invention is incorporated into an underwater repair mortar, it can be said that the surface water-tightening effect together with effective strength development is obtained.

Claims (7)

삭제delete 삭제delete 표면 수밀화제 조성물, 속경성 결합재, 잔골재를 포함하여 배합되는 수중 보수 모르타르 조성물로서,
상기 표면 수밀화제 조성물은, 입도가 10㎛ 이하인 SBR(Styrene-Butadiene-Rubber) 분말 0.2~1.2 중량부; 기공율이 65~80%로 0.1~0.3mm의 과립 입도를 가지는 활성 알루미나겔 1.0~3.0중량부; 수열합성에 의하여 제조된 토버모라이트 수화물을 600~800℃의 온도에서 열처리한 후, 4,000㎠/g 이상의 분말도를 가지도록 분쇄한 하소 토버모라이트(calcined tobermorite) 분말 1.5~4.5중량부;를 포함하여 조성되는 것이며,
상기 속경성 결합재는, 칼슘알루미네이트 광물, 인산칼륨, 규회석, 시멘트를 포함하는 것으로, 상기 칼슘알루미네이트 광물과 인산칼륨이 1:0.7~1.0의 중량비로 구성되면서 속경성 결합재 100중량부에 대하여 30~80중량부 포함되는 것임을 특징으로 하는 속경형 표면 수밀화 수중 보수 모르타르 조성물.An underwater repair mortar composition comprising a surface water-tightening composition, a quick-setting binder, and a fine aggregate,
Wherein the surface water-tightening composition comprises 0.2 to 1.2 parts by weight of SBR (Styrene-Butadiene-Rubber) powder having a particle size of 10 m or less; 1.0 to 3.0 parts by weight of an activated alumina gel having a granular particle size of 0.1 to 0.3 mm with a porosity of 65 to 80%; 1.5 to 4.5 parts by weight of calcined tobermorite powder which has been heat treated at a temperature of 600 to 800 ° C. and pulverized to have a powderity of 4,000 cm 2 / g or more; ≪ / RTI >
The quick-setting binder includes calcium aluminate mineral, potassium phosphate, wollastonite, and cement. The calcium aluminate mineral and potassium phosphate are mixed at a weight ratio of 1: 0.7-1.0, To 80 parts by weight based on the total weight of the mortar composition. 제3항에서,
상기 속경성 결합재 중의 규회석은, 분말도가 1,800~3,000㎠/g이며 섬유상으로 평균길이:직경의 비가 12:1 이상인 것임을 특징으로 하는 속경형 표면 수밀화 수중 보수 모르타르 조성물.4. The method of claim 3,
Wherein the wollastonite in the quick-setting binder has a powder degree of 1,800 to 3,000 cm < 2 > / g and a fibrous shape with an average length: diameter ratio of 12: 1 or more. 제3항에서,
상기 속경성 결합재는, 실리카흄, 고로슬래그 미분말, 플라이애쉬 중에서 하나 이상 더 포함하는 것을 특징으로 하는 속경형 표면 수밀화 수중 보수 모르타르 조성물.4. The method of claim 3,
Wherein the quick hardening binder comprises at least one of silica fume, blast furnace slag fine powder and fly ash. 제3항에서,
상기 수중 보수 모르타르 조성물은, 수중 불분리제, 유동화제, 발수제, 증점제 중에서 하나 이상에 의한 첨가제를 더 포함하여 조성되는 것을 특징으로 하는 속경형 표면 수밀화 수중 보수 모르타르 조성물.4. The method of claim 3,
Wherein the underwater repair mortar composition is further comprised of at least one additive selected from the group consisting of an underwater dispersing agent, a fluidizing agent, a water repellent agent and a thickening agent. 제4항에 따른 속경형 표면 수밀화 수중 보수 모르타르 조성물을 이용하여 수중 열화 콘크리트 구조물을 보수함에 있어,
수중 콘크리트 구조물의 열화된 부분을 제거한 후, 수중 보수 모르타르를 충전 시공하는 것을 특징으로 하는 콘크리트 수중 보수공법.In repairing deterioration concrete structure in water using the fast-curing type surface-water-milled waterproof mortar composition according to claim 4,
Wherein the deteriorated portion of the underwater concrete structure is removed, and the underwater repair mortar is charged and constructed.
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