KR960012720B1 - Composition of lightweight concrete - Google Patents

Composition of lightweight concrete Download PDF

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Publication number
KR960012720B1
KR960012720B1 KR1019940002861A KR19940002861A KR960012720B1 KR 960012720 B1 KR960012720 B1 KR 960012720B1 KR 1019940002861 A KR1019940002861 A KR 1019940002861A KR 19940002861 A KR19940002861 A KR 19940002861A KR 960012720 B1 KR960012720 B1 KR 960012720B1
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parts
foamed concrete
composition
lightweight
cement
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KR1019940002861A
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Korean (ko)
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KR950024997A (en
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이준형
조용길
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이준형
조용길
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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
    • 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
    • C04B28/02—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 hydraulic cements other than calcium sulfates
    • 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
    • C04B24/12—Nitrogen containing compounds organic derivatives of hydrazine
    • C04B24/14—Peptides; Proteins; Derivatives thereof
    • 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
    • C04B16/00—Use 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
    • C04B16/02—Cellulosic materials
    • 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
    • C04B16/00—Use 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
    • C04B16/04—Macromolecular compounds
    • C04B16/08—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons
    • C04B16/082—Macromolecular compounds porous, e.g. expanded polystyrene beads or microballoons other than polystyrene based, e.g. polyurethane foam
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • 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
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52—Sound-insulating materials
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • 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
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

The composition for lightweight foam concrete comprises 240 wt. parts a cement, 1 wt. parts a foaming agent(animal protein), 10 wt. parts E.V.A(Ethylene Vinyl Acetato) foamed powder, 10 wt. parts a cellulose fiber, 10 wt. parts a fly-ash, and a suitable amount of water. This is especially useful in preventing crack of concrete itself, as well as the improvement of lightweight, heat-insulation and sound-proofing property.

Description

경량기포 콘크리트 조성물Lightweight Foamed Concrete Composition

본 발명은 균열방지성이 우수한 경량기포 콘크리트 조성물에 관한 것으로 더욱 구체적으로는 경량 콘크리트의 특징인 경량, 단열, 방음등의 효과를 얻기 위한 일반적인 목적외에 경량기포 콘크리트 자체의 균열방지성을 향상시킴과 동시에 옥상이나 아파트바닥을 시공함에 있어서, 다른 적층 콘크리트 구조물에 상승효과를 부여하는 기포 콘크리트 조성물을 제공하는 것이다.The present invention relates to a lightweight foamed concrete composition with excellent cracking resistance, and more particularly, to improve cracking prevention of lightweight foamed concrete itself in addition to the general purpose for obtaining the effects of light weight, heat insulation, soundproofing, etc. At the same time in the construction of a roof or apartment floor, to provide a foamed concrete composition that gives a synergistic effect to other laminated concrete structures.

경량기포 콘크리트라 함은 시멘트 기포제를 첨가하여 타설후 경화된 콘크리트 내부에 수많은 기포군을 형성시키므로서 구조물에 경량, 단열, 방음성의 작용을 갖게 한 것으로 경량기포 콘크리트에 사용되는 기포제로는 상온에서 기포군을 발생시키는 액상의 동물성 단백질 기포제와 급속히 가열하여 기포군을 발생시키는 알미늄파우더제로 구분되나 알미늄파우더제는 주로 콘크리트 제품에 사용되고 있으며 액상제는 현장 타설제로 사용하고 있다.Lightweight foamed concrete is a foaming agent used in lightweight foamed concrete that has the effect of light weight, insulation and sound insulation by forming numerous bubble groups in the hardened concrete after adding cement foaming agent. It is divided into a liquid animal protein foaming agent that generates a group and an aluminum powder that generates a bubble group by rapidly heating, but the aluminum powder is mainly used for concrete products, and the liquid is used as a field pouring agent.

본 발명에서는 기포제로서 액상의 동물성 단백질을 사용하는 현장타설제에 의한 경량콘크리트를 대상으로 하지만 종래의 현장타설제에 의해서 경화된 경량기포 콘크리트는 과다한 물을 사용하므로서 시멘트 미세입자간에 접착력이 저하되어 압축강도가 충격강도가 약하여 크랙이 쉽게 발생하고 또 시멘트 분말이 수분을 흡수하여 완전히 양생경화되기 전에 수분이 증발하여 소정의 강도를 갖지 못하므로서 크랙발생의 원인이 되고 있다.In the present invention, although the lightweight concrete by the in-situ cast using a liquid animal protein as a foaming agent is targeted, the lightweight foamed concrete cured by the conventional in-situ cast is reduced by the adhesion between the cement fine particles by using excess water Its strength is weak and the impact strength is weak so that cracks are easily generated, and moisture is evaporated before the cement powder absorbs water and cures completely, thereby causing cracks.

그밖에도 현장시공에 의하여 경화된 기포 콘크리트층을 이의 윗층인 바닥마감미장층 시공시 바닥마감미장층의 수분을 대량 흡수하여 상부미장층의 양생경화에 필요한 수분이 부족하게 되어 결국 강도를 저하시킴으로서 미장층에 크랙 발생의 원인을 초래한다.In addition, when the bubble concrete layer cured by the site construction absorbs a lot of moisture in the floor finishing layer, which is the upper layer of the floor finishing layer, it lacks the moisture necessary for curing curing of the upper layer and eventually reduces the strength. Causes cracking in the layer.

본 발명은 종래 현장 타설제에 의하여 경화된 경량기포 콘크리트의 자체 강도는 물론 상부미장층의 강도 증대에 상승효과를 부여하는 경량기포 콘크리트 조성물로서 이의 구성비는 아래와 같다.The present invention is a light-weight foamed concrete composition which gives a synergistic effect to the strength of the upper plastering layer as well as the strength of the light-weight foamed concrete cured by the conventional site-pouring agent, its composition ratio is as follows.

이상의 경량기포 콘크리트 조성물은 종래의 일반적인 기포콘크리트에 비해 E. V. A 발포분말, 목질섬유, 프라이애쉬등이 경량기포 콘크리트의 물성개선제로 첨가되고 있다.Compared to conventional foamed concrete, the above-mentioned lightweight foamed concrete composition is added to E. V. A foamed powder, wood fiber, fry ash, etc. as a physical property improving agent of lightweight foamed concrete.

여기에서 E. V. A(Eteylene Vinyl Acetato)발포분말은 시멘트 입자간에 접착력을 부여하고 콘크리트 구조물의 수축팽창에 따른 완충작용과 내충격성을 부여하므로서, 크랙방지성을 향상시키며 양생경화에 필요한 수분을 흡수하여 수분의 증발을 방지하므로서 만족한 양생경화를 달성할 수 있으며, 목질섬유는 경량기포 콘크리트의 조직간에 결착력을 증진시키고 시공타설시 E. V. A 발포분말과 같이 수분을 장기간 흡수 보유하고 있어 양생경화에 필요한 수분을 서서히 공급하므로서 강도를 높힐 수 있다.Here, EV A (Eteylene Vinyl Acetato) foaming powder provides adhesion between cement particles and provides cushioning and impact resistance according to shrinkage and expansion of concrete structures, thereby improving crack prevention and absorbing moisture required for curing curing. Satisfying curing hardening can be achieved by preventing evaporation of wood fiber. Wood fiber improves binding force between structures of lightweight foam concrete and absorbs moisture for long time like EV A foaming powder during construction casting. The strength can be increased by feeding slowly.

특히, 프라이애쉬는 시멘트를 절약하는 이점과 몰탈 혼합물에 유동성을 주기 때문에 작업성과 안정성을 피선하고 시멘트에 대한 물의 양을 감소시킬 수 있으며 포졸란 반응으로 후기 강도를 증대시킨다. 또 프라이애쉬의 미세하고 둥근 알갱이가 시멘트 조직간의 틈을 메우는 역할을 하여 조직을 치밀하게 하는 동시에 프라이애쉬의 구성성분인 실리카와 알미늄이 시멘트중의 수산화칼슘과 반응하여 생성되는 불용성 물질이 모세관을 차단하여 물의 침투를 막으며 단위 수량 수화열의 감소와 블리이딩 감소로 수축 및 팽창율이 감소되어 균열이 방지된다.In particular, fry ash provides the advantages of saving cement and fluidity to the mortar mixture, thus improving workability and stability, reducing the amount of water to the cement and increasing late strength with pozzolanic reactions. In addition, the fine and round grains of the fryer serve to fill the gaps between the cement tissues, thereby densifying the tissues, and the insoluble material formed by the reaction of the silica and aluminum components of the fryer with the calcium hydroxide in the cement blocks the capillary. It prevents water from penetrating and reduces shrinkage and expansion rate by reducing unit heat of hydration and bleeding to prevent cracking.

그밖에도 상부층인 마무리 미장층과 관련하여 미장층 시공시 경화된 경량기포 콘크리트층이 미장층의 수분흡수를 대량으로 감소시킬 수 있으므로 미장층이 양생 경화에 필요한 수분을 보유할 수 있어 결국 경화후 미장층의 강도증대에 상승효과를 부여하게 되는 것이다.In addition, the light-bubble concrete layer hardened during the construction of the plastering layer in relation to the finishing plastering layer, which is the upper layer, can reduce the water absorption of the plastering layer in large quantities, so that the plastering layer can retain the moisture necessary for curing curing. This will give a synergistic effect to the increase in strength of the layer.

본 발명에 의한 경량기포 콘크리트의 효과를 측정하기 위하여 종래의 일반적인 경량기포 콘크리트 조성물과 본 발명에 의한 경량기포 콘크리트 조성물을 사용하여 물성을 비교하였다.In order to measure the effect of lightweight foamed concrete according to the present invention, the physical properties of the conventional lightweight foamed concrete composition and the lightweight foamed concrete composition according to the present invention were compared.

실시예 1Example 1

(1) 종래 경량기포 콘크리트 조성물(1) Conventional lightweight foamed concrete composition

(2) 본 발명에 의한 경량기포 콘크리트 조성물(2) lightweight foamed concrete composition according to the present invention

이상의 (1) 및 (2)의 조성물을 혼합하여 동일한 기간에 완전히 양생경화하여 경량화하여 경량기포 콘크리트 각각을 얻고 이로서 물성시험을 한 결과 물성시험 비교표(1)을 얻었다.The compositions of (1) and (2) above were mixed and cured completely in the same period to reduce the weight to obtain lightweight foamed concrete, respectively, and as a result of the physical property test, a physical property comparison table (1) was obtained.

물성시험 비교표(1)Physical property test comparison table (1)

이상의 물성시험비교표(1)에서와 같이 본 발명에 의한 경량기포 콘크리트를 열전도율이 종래 경량기포 콘크리트에 비해 낮으므로 수축 팽창율이 적고 압축강도가 상대적으로 높으므로 균열 방지에 우수한 효과가 있고 더욱이 미장층의 강도를 향상시켜 결합된 적층이 더욱 상승 효과를 발휘할 수 있는 경량기포 콘크리트 조성물이다 할 수 있다.As shown in the physical property test comparison table (1) above, the lightweight foamed concrete according to the present invention has a lower thermal conductivity than the conventional lightweight foamed concrete, so that the shrinkage expansion rate is low and the compressive strength is relatively high. It can be said that it is a lightweight foamed concrete composition that can improve the strength, the combined laminate can further exert a synergistic effect.

Claims (1)

경량기포 콘크리트 조성물에 있어서, 중량비로 시멘트 240부 기포제(동물성단백질) 1부, E. V. A 발포분말 10부, 목질섬유 10부, 프라이애쉬 10부, 적량의 물로 조성된 경량기포 콘크리트 조성물.Light-weight foamed concrete composition, comprising: 240 parts of cement foaming agent (animal protein) by weight, 10 parts E. V. A foamed powder, 10 parts of wood fiber, 10 parts of fry ash, suitable amount of water.
KR1019940002861A 1994-02-18 1994-02-18 Composition of lightweight concrete KR960012720B1 (en)

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