KR19990048208A - Hardening Cement (Mortal) Composition - Google Patents

Hardening Cement (Mortal) Composition Download PDF

Info

Publication number
KR19990048208A
KR19990048208A KR1019970066833A KR19970066833A KR19990048208A KR 19990048208 A KR19990048208 A KR 19990048208A KR 1019970066833 A KR1019970066833 A KR 1019970066833A KR 19970066833 A KR19970066833 A KR 19970066833A KR 19990048208 A KR19990048208 A KR 19990048208A
Authority
KR
South Korea
Prior art keywords
composition
cement
oxide
mortal
inorganic
Prior art date
Application number
KR1019970066833A
Other languages
Korean (ko)
Other versions
KR100253886B1 (en
Inventor
최용주
Original Assignee
최용주
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 최용주 filed Critical 최용주
Priority to KR1019970066833A priority Critical patent/KR100253886B1/en
Publication of KR19990048208A publication Critical patent/KR19990048208A/en
Application granted granted Critical
Publication of KR100253886B1 publication Critical patent/KR100253886B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C04B14/066—Precipitated or pyrogenic silica
    • 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
    • C04B14/304—Magnesia
    • 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
    • C04B14/36—Inorganic materials not provided for in groups C04B14/022 and C04B14/04 - C04B14/34
    • C04B14/366—Phosphates, e.g. apatite
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0004—Compounds chosen for the nature of their cations
    • C04B2103/0006—Alkali metal or inorganic ammonium compounds
    • C04B2103/0009—Inorganic ammonium compounds
    • 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
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

생석회, 실리카, 알루미나를 주성분으로하고 물을 사용하여 수화경화시키는 종래 시멘트 조성물과는 달리 실리카 및 산화마그네슘을 주성분으로 하는 무기조성물에 암모늄 폴리포스페이트 용액을 사용 경화응고시키는 속성 경화시멘트(몰탈)조성물에 관한것임.Unlike conventional cement compositions which are composed of quicklime, silica, and alumina and are hydrate-cured using water, the composition is hardened and solidified using an ammonium polyphosphate solution in an inorganic composition based on silica and magnesium oxide. About.

Description

[발명의 명칭][Name of invention]

속성 경화시멘트(몰탈)조성물Hardening Cement (Mortal) Composition

[발명의상세한설명]Detailed description of the invention

본발명은 시멘트에 물을 사용하지 않고 경화되는 속성경화시멘트(몰탈)조성물에 관한 것으로 더욱 구체적으로 규사 및 산화마그네슘을 주성분으로하는 무기물 조성물에 액상의 암모늄폴리포스페이트를 첨가함으로써 속성으로 경화응고되는 시멘트(몰탈)조성물에 관한 것이다.The present invention relates to a fast-hardening cement (mortal) composition that is cured without using water in cement. More specifically, cement hardened and cured by adding liquid ammonium polyphosphate to inorganic composition mainly composed of silica sand and magnesium oxide (Mortar) relates to a composition.

[발명이 속하는 기술분야 및 종래기술]TECHNICAL FIELD AND THE INVENTION

종래 일반시멘트 조성물에 비해 산화마그네슘 함량이 많은 시멘트로서 경화응고반응에 있어 물을 사용하지 않는 특수 시멘트의 기술분야로서 이와 유사한 종래기술로서 산화마그네슘을 주성분으로하는 시멘트로서 천연 마그네사이트를 하소하거나 그밖의 다른 방법으로 얻어진 마그네시아에 염화마그네슘용액을 혼합함으로써 얻어지는 장식용의 인조석이나 타일제조용으로 사용하는 소위 소렐석(sorel stone)으로 비교적 응결이 빨라서 사용상 편리한 점이 있고 여기에 광물질의 혼합재료를 첨가한 것은 굳어진후 강도가 커서 다른 인조석보다 성질이 좋고 연마하면 광택을 가지게되나 수분에 약하여 외부용으로 사용할수 없고 표면응결이 좋지않는 문제점을 갖고 있다.This is a cement with a higher content of magnesium oxide than a conventional cement composition, and it is a technical field of special cement which does not use water in curing coagulation reaction. It is similar to the related art. It is a cement based on magnesium oxide, and calcined natural magnesite or other It is a so-called sorel stone used for decorative artificial stone or tile manufacturing obtained by mixing magnesium chloride solution with magnesia obtained by the method, and it has a relatively quick condensation, and it is convenient in use. Larger than other artificial stones, the property is better and polished, but has a problem that it is weak to moisture and cannot be used for external use, and surface condensation is not good.

그밖에도 특수시멘트로서 인산에 금속산화물을 첨가하여 얻어진 인산시멘트는 내화석, 내식성, 내마모성이 좋으나 몰탈제로서 열을 가해야하는 문제점이 있어 대량으로 사용하기에는 적합치 않고 칫과용 시멘트용 특수용도로 사용되어 사용범위가 한정되어 있다.In addition, phosphate cements obtained by adding metal oxides to phosphoric acid as special cements have good resistance to refractory stone, corrosion resistance and abrasion, but have to be heated as mortar, which is not suitable for use in large quantities. The range is limited.

[본발명이 해결하고저하는 기술적 과제][Technical problem solved and lowered by the present invention]

토목건축 분야에서 공사기간의 장기화는 사업의 흥패를 좌우할 수도 있다. 이와 같은 문제점은 종래 시멘트의 수화반응과 응결 경화를 거쳐 소정의 강도를 갖기 위하여 소요되는 기간도 공사기간의 장기화요인이 되고 있다.In the field of civil construction, the prolonged period of construction may determine the success of the project. This problem is also a long-term factor of the construction period is also required to have a predetermined strength through the hydration reaction and condensation hardening of the cement.

본 발명은 초고속의 경화기능과 짧은 시간에 내압강도를 가지며 종래 시멘트의 시공상 물성상의 취약점을 보완할수 있는 기경성시멘트 조성물로서 구체적으로는 실리카 및 산화마그네슘을 주원료로 하는 무기 조성물에 액상의 암모늄폴리포스페이트를 첨가함으로써 얻어지는 시멘트(몰탈)조성물로서 응고 경화속도의 단축과 단기간에 고강도의 내압성을 가지며 작업성이 뛰어나고 내약품성, 내열성이 우수한 시멘트(몰탈)조성물을 해결함에 목적이 있다 하겠다.The present invention is a rigid cement composition which has a high-speed curing function and a pressure resistance in a short time, and can compensate for the weaknesses in the conventional physical properties of cement. Specifically, liquid ammonium poly is used in an inorganic composition composed mainly of silica and magnesium oxide. As a cement (mortar) composition obtained by adding phosphate, the purpose of the present invention is to shorten the solidification curing rate and to solve the cement (mortal) composition having excellent workability, excellent chemical resistance and heat resistance.

[발명의 기술구성 및 작용][Technology Composition and Action of the Invention]

본 발명은 실리카 및 산화마그네슘을 주성분으로 하는 무기물조성물에 암모니움 폴리 포스페이트 용액(Aluminium Poly Phosphato Solutoon)을 첨가한 시멘트(몰탈)조성물로서 상세하게는 중량비로 실리카(Sio2) 65-82% 및 산화마그네슘(Mgo) 22-28%에 알루미나, 산화철, 산화티탄, 산화망간, 산화칼슘, 산화칼리움 중에서 선택된 적어도 하나 이상의 무기화합물 0.1%-1.5%을 첨가한 무기조성물 100㎏에 암모늄폴리 포스페이트용액(Amonium Poly Phosphato Solutoon) 20-30㎏로 저성된 시멘트(몰탈)조성물이라 할 수 있다.The invention particularly, at a weight ratio of silica (Sio 2) 65-82%, and oxide as the ammonium polyphosphate solution (Aluminium Poly Phosphato Solutoon) a cement (mortar) composition was added to the inorganic composition as a main component of silica and magnesium oxide To ammonium polyphosphate solution (100 kg) of an inorganic composition containing 22% to 28% of magnesium (Mgo) and 0.1% to 1.5% of at least one inorganic compound selected from alumina, iron oxide, titanium oxide, manganese oxide, calcium oxide and calcium oxide. Amonium Poly Phosphato Solutoon) Cement (Mortal) composition made of 20-30kg.

상기 시멘트 조성물중에서 분말상의 무기 화합물끼리는 반응이 거의 일어나지 않지만 활성용액 즉 암모늄폴리 포스페이트 용액을 첨가하면 이용액과 무기조성물이 빠른시간내에 반응하여 용액중의 암모니아가 떨어져나가 휘산하고 무기물과 결합하여 견고한 망상구조를 형성하게 된다.In the cement composition, the powdery inorganic compounds rarely react with each other, but when an active solution, ie, ammonium polyphosphate solution, is added, the used solution and the inorganic composition react with each other in a short time. Will form.

또 무기 조성물에 대한 활성용액의 첨가 비율에 있어서 활성용액을 적게 첨가하면 무기조성물이 미반응 상태로 남게되고 활성용액을 과량으로 첨가하면 잔여 활성용액이 콘크리트내에 잔류하여 장기간 암모니아 개스를 발생한다.In addition, if the active solution is added in the ratio of the active solution to the inorganic composition, the inorganic composition remains in an unreacted state. If the active solution is added in excess, the remaining active solution remains in concrete to generate ammonia gas for a long time.

또 무기조성물이 과량으로 존재하면 반응되지 않는 무기물이 콘크리트에 남게되어 강도가 떨어진다. 결국 본 조성물에서 규정한 첨가 범위가 위와같은 문제점을 발생치않고 경화의 속도가 극히 빠르고 내압강도, 충격강도, 내약품성 등의 물성이 우수하다.In addition, if the inorganic composition is present in excess, the unreacted inorganic material remains in the concrete and the strength decreases. After all, the addition range defined in the present composition does not cause the above problems, and the curing speed is extremely fast and excellent in physical properties such as pressure resistance, impact strength, and chemical resistance.

그 밖에 시멘트 조성물에 있어서 산화마그네슘은 염기성 성분이나 대부분 활성용액과 단시간에 반응하여 결합하게되고 일부는 용액중에 소량으로 존재하는 물에 의하여 다른 성분과 결합 고용체를 형성하게 된다. 그러나 산화마그네슘이 지나치게 많을 경우는 시멘트가 경화한 다음에 팽창이 일어나 균열의 원인이된다. 또 실리카(Sio2)는 콘크리트의 강도를 높이고 내수성을 좋게한다. 이와같은 결과는 장기간에 걸친 실험을 통해 얻어진 결과라할수 있다.In addition, in the cement composition, magnesium oxide reacts with basic components or most active solutions in a short time, and some of them form a binding solid solution with other components by a small amount of water present in the solution. However, if the magnesium oxide is excessively large, the cement hardens and then expands, causing cracking. In addition, silica (Sio2) increases the strength of concrete and improves water resistance. These results can be said to be obtained through a long experiment.

[효과][effect]

본발명에 의한 시멘트 조성물은 물을 사용하지 않기 때문에 종래 시멘트에 일반적으로 사용하는 동결 융해에 대한 저항성을 갖도록하는 AE제, 시멘트입자를 분산시켜서 단위수량을 감소시키거나 콘크리트중에 미세기포를 연행시키면서 작업성을 향상시키는 한편 분산효과에 의해 단위수량을 감소시킬수 있는 감수제, 유동화제, 수축감수제 등의 각종혼화제를 사용하지않으므로 작업성이 용이하며, -23℃에서 55℃의 온도 범위에서 시공이 가능함으로 특히 추운겨울철에도 공사가 가능한 장점을 갖고 있다.Since the cement composition according to the present invention does not use water, the AE agent, which has resistance to freeze-thawing commonly used in conventional cement, disperses cement particles to reduce the unit quantity or entrains fine bubbles in concrete. It does not use various admixtures such as water reducing agent, fluidizing agent and shrinking reducing agent which can reduce the unit quantity by dispersing effect while improving the property, and it is easy to work and can be installed in the temperature range of -23 ℃ to 55 ℃. In particular, construction works in cold winter.

또 특징으로는 빠른 성형능력과 초기 강도가 커서 시공 2시간만에 내압강도 200㎏/cm2-250㎏/cm2을 얻을 수 있고 일상적으로 사용되는 화학약품과 용재, 그리고 염수에 대한 내구성이 우수하고 또한 종래의 시멘트의 주성분인 산화칼슘을 거의 사용하지 않으므로 콘크리트내 철근에 대한 부식성도 없다. 그 밖에도 최고 내열 가능 온도가 1000℃에 달해 내열성이 뛰어나며 초속성 경화로 수중작업에 작업이 용이하고 성능 또한 우수함이 입증되고 있다.In addition, it has fast forming ability and initial strength, so it can get pressure resistance 200㎏ / cm 2 -250㎏ / cm 2 within 2 hours of construction and has excellent durability against chemicals, solvents and salt water used in daily use. In addition, since calcium oxide, which is a main component of the conventional cement, is rarely used, there is no corrosion of reinforcing steel in concrete. In addition, the maximum heat-resistant temperature of 1000 ℃ is excellent heat resistance, and the super-fast curing has been proved to be easy to work underwater and excellent performance.

그리고 본발명에 의한 시멘트 조성물로서 시공 가능한 작업들은 움푹패이거나 파손된 도로의 보수, 콘크리트벽, 기둥, 지주, 상판, 교량 등에 사용이 가능하고 산업용 플로어링과 공장설비보수, 상업용냉동창고 바닥보수, 수로의 벽이나 수문등의 수로정비산업, 공항활구로 정비사업, 선착장이나 선착장화물창고, 기계지주 및 지주볼트 고정작업, 도시가스 및 지하케이블 맨홀의 보수등 그용도가 광범위하다.And works that can be constructed as a cement composition according to the present invention can be used for repairing pit or damaged roads, concrete walls, columns, struts, tops, bridges, industrial flooring, factory equipment repairs, commercial freezer floor repairs, waterways It is widely used for waterway maintenance industry such as wall and floodgate, airport runway maintenance business, dock or dock cargo warehouse, machine holding and holding bolt fixing work, repair of city gas and underground cable manhole.

상술한 바와 같은 본발명에 의한 시멘트 조성물의 효과를 알아보고 기술구성을 구체화하기 위해 실시예를 들기로 한다.In order to find out the effect of the cement composition according to the present invention as described above and to specify the technical configuration will be given an embodiment.

실시예 (1)Example (1)

Sio273㎏, Mgo 26㎏, Al2o31㎏을 혼합한 무기조성물에 비중 1.4%, 25㎏의 암모니움 폴리 포스페이트용액을 23㎏을 첨가한 시멘트 조성물을 경화하여 고화시킨 콘크리트 제품으로 물성시험을 한결과 아래와 같은 수치를 얻었다.A concrete product obtained by curing a cement composition in which an inorganic composition containing 73 kg of Sio 2, 26 kg of Mgo, and 1 kg of Al 2 o 3 was mixed with 23 kg of ammonium polyphosphate solution having a specific gravity of 1.4% and 25 kg. The test resulted in the following values.

(1) : 압축강도(1): compressive strength

(2) 빔강도(2) beam strength

(3) : 접착강도(3): adhesive strength

콘크리트 60㎏/cm2 Concrete 60㎏ / cm 2

금속 40㎏/cm2 Metal 40㎏ / cm 2

Claims (1)

중량비로 실리카 65-82% 및 산화마그네슘(Mgo) 22-28%에 알루미나, 산화철, 산화티탄, 산화칼슘, 산화망간, 산화칼리움 중에서 하나 이상의 무기화합물을 첨가하여서된 무기조성물 100㎏에 대하여 암모니움폴리포스페이트용액(Ammonium Poly Phosphate Solution)을 첨가함을 특징으로 하는 속성 경화시멘트(몰탈)조성물Ammonia for 100 kg of inorganic composition obtained by adding at least one inorganic compound of alumina, iron oxide, titanium oxide, calcium oxide, manganese oxide, and calcium oxide to 65-82% silica and 22-28% magnesium oxide (Mgo) by weight. Fast curing cement (mortar) composition characterized by adding Ammonium Poly Phosphate Solution
KR1019970066833A 1997-12-09 1997-12-09 Cement mortar composition for rapid cementation KR100253886B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970066833A KR100253886B1 (en) 1997-12-09 1997-12-09 Cement mortar composition for rapid cementation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970066833A KR100253886B1 (en) 1997-12-09 1997-12-09 Cement mortar composition for rapid cementation

Publications (2)

Publication Number Publication Date
KR19990048208A true KR19990048208A (en) 1999-07-05
KR100253886B1 KR100253886B1 (en) 2000-04-15

Family

ID=19526750

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970066833A KR100253886B1 (en) 1997-12-09 1997-12-09 Cement mortar composition for rapid cementation

Country Status (1)

Country Link
KR (1) KR100253886B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436120B1 (en) * 2001-12-05 2004-06-14 유성권 High speed hardening cement composition
KR100492223B1 (en) * 2000-12-22 2005-05-27 주식회사 포스코 Refractory Mortar Containing Carbon
WO2015060668A1 (en) * 2013-10-25 2015-04-30 주식회사 휴리스 Waterproof mortar composition and method for preparing same
KR20150047929A (en) 2013-10-25 2015-05-06 주식회사 휴리스 Ultra rapid hardening mortar composition and manufacturing method using the same
KR20190074575A (en) 2017-12-20 2019-06-28 주식회사 휴리스 Eco-friendly ultra rapid hardening mortar composition and manufacturing method using the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100455622B1 (en) * 2001-10-19 2004-11-15 이재환 The composition of mortar having various function
KR100803226B1 (en) 2006-09-08 2008-02-18 이재환 Powder paint composition of various function that is hardened by hychation
KR100982469B1 (en) 2010-03-29 2010-09-15 (주)피엠씨 Very-early strength mortar composition for constructing speedy and construction method thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836854A (en) * 1984-06-27 1989-06-06 J. R. Simplot Co. Stabilization of setting times of phosphate-bonded magnesia cements

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100492223B1 (en) * 2000-12-22 2005-05-27 주식회사 포스코 Refractory Mortar Containing Carbon
KR100436120B1 (en) * 2001-12-05 2004-06-14 유성권 High speed hardening cement composition
WO2015060668A1 (en) * 2013-10-25 2015-04-30 주식회사 휴리스 Waterproof mortar composition and method for preparing same
KR20150047929A (en) 2013-10-25 2015-05-06 주식회사 휴리스 Ultra rapid hardening mortar composition and manufacturing method using the same
KR20190074575A (en) 2017-12-20 2019-06-28 주식회사 휴리스 Eco-friendly ultra rapid hardening mortar composition and manufacturing method using the same

Also Published As

Publication number Publication date
KR100253886B1 (en) 2000-04-15

Similar Documents

Publication Publication Date Title
US6264740B1 (en) Inorganic cementitious material
KR100894934B1 (en) Micro-granulose particulates
KR101528120B1 (en) Repairing and reinforcing material for concrete structure and method of repairing and reinforcing concrete structure using the same
USRE31682E (en) Process for manufacturing concrete of high corrosion resistance
US4402749A (en) Cementitious compositions with early high strength development and methods for controlling setting rate
KR101900248B1 (en) Improved cement mortar composition with anti-environment performance
EP3245171B1 (en) Method for making concrete compositions
KR101363896B1 (en) Accelerate dry concrete mix composition
CA2967476C (en) Improved cementitious compositions and methods of making and using the same
KR100706636B1 (en) High speed hardening epoxy resin concrete for the use of a paving bridge
KR100253886B1 (en) Cement mortar composition for rapid cementation
US5401310A (en) Additive composition with insulating, impermeabilizing and antishrink properties
KR0134253B1 (en) Curing method of industrial waste and soil mixture
EP3615492A1 (en) Cementitious compositions and methods of making and using the same
JPH07315907A (en) Polymer cement based composite material
CN107746233A (en) A kind of mortar for building and its production method
EP3762348B1 (en) A setting and hardening accelerator for a cement, mortar or concrete composition, optionally comprising supplementary cementitious materials, and use of this accelerator
Maeda Slag cement-related products which utilized a property of the Ground Granulated Blast Furnace Slag
Vieira Concrete
NO151544B (en) PROCEDURE FOR AA PREVENT Corrosion of the reinforcement in concrete
Surahyo et al. Constituent Materials
KR102329798B1 (en) Concrete composition for repair and reinforcement including fiber reinforcement and repair and reinforcement method for concrete structures using the same
EP3060532B1 (en) Corrosion protected fibre-reinforced cement composition for use in cold temperature conditions
Whitney Chemical admixtures
CN108147751A (en) A kind of construction high-weatherability concrete and preparation method thereof

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20040225

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee