KR100526898B1 - Cement composition for preparing of concrete - Google Patents

Cement composition for preparing of concrete Download PDF

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KR100526898B1
KR100526898B1 KR10-2003-0027719A KR20030027719A KR100526898B1 KR 100526898 B1 KR100526898 B1 KR 100526898B1 KR 20030027719 A KR20030027719 A KR 20030027719A KR 100526898 B1 KR100526898 B1 KR 100526898B1
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concrete
cement composition
weight
cement
reducing agent
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KR20040093863A (en
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이정섭
김병기
강범구
김용태
안태호
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케이지케미칼 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/66—Details of globes or covers forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/06—Hanging lustres for chandeliers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2121/00—Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/806—Ornamental or decorative

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

본 발명은 콘크리트 제조용 시멘트 조성물에 있어서, 시멘트 중량의 5~25중량%의 메타카올린과 0.5~3.0중량%의 나프타린계 또는 폴리카르복실산계 고성능 감수제로 조성된 콘크리트 제조용 시멘트 조성물에 관한 것이다.The present invention relates to a cement composition for producing concrete, wherein the cement composition is composed of 5 to 25% by weight of metakaolin and 0.5 to 3.0% by weight of naphthalin or polycarboxylic acid based high performance water reducing agent.

본 발명의 시멘트 조성물은 고가의 실리카흄을 사용하지 않고서도 고강도 콘크리트를 제조할 수 있는 효과가 있다. 또한 슬래그 및 플라이애쉬 등의 혼화재료를 함유하는 시멘트 조성물에 메타카올린을 혼합 첨가하면 초기압축강도 증가효과가 있다.The cement composition of the present invention has the effect of producing high-strength concrete without using expensive silica fume. In addition, when the metakaolin is added to the cement composition containing a mixed material such as slag and fly ash, the initial compressive strength is increased.

Description

콘크리트 제조용 시멘트 조성물 {Cement composition for preparing of concrete}        Cement composition for preparing of concrete

본 발명은 콘크리트제조용 시멘트 조성물에 관한 것이다. 구체적으로는 시멘트, 모래, 골재, 감수제(Water reducing agent)등의 첨가제로 조성되는 콘크리트 제조용 조성물에 사용되는 시멘트를, 시멘트의 일정량을 메타카올린(metakaolin)으로 대체시키고 여기에 적합한 감수제를 첨가하여서된 콘크리트 제조용 시멘트 조성물에 관한 것이다.The present invention relates to a cement composition for producing concrete. Specifically, the cement used in the composition for manufacturing concrete, which is composed of additives such as cement, sand, aggregate, and water reducing agent, is replaced by replacing a certain amount of cement with metakaolin and adding a suitable water reducing agent thereto. It relates to a cement composition for producing concrete.

일반적으로 콘크리트에 고강도 특성을 부여하는 방법으로는 잠재 수경성 재료인 슬래그(slag), 포졸란 재료인 플라이애쉬(fly ash), 실리카흄(silica fume)과 같은 재료들이 사용되고 있으며 특히 실리카흄의 경우 고강도 특성이 요구되는 분야에 많이 사용되고 있다. Generally, materials such as slag, which is a latent hydraulic material, fly ash, and silica fume, which are used to impart high strength to concrete, are used. Particularly, silica fume requires high strength. It is used in many fields.

일반강도 콘크리트를 (150~400 kgf/cm2) 제조하기 위해서는 산업부산물인 슬래그, 플라이애쉬와 같은 무기질 혼화재를 제조할 콘크리트의 시멘트에 일정량을 대체하여 주로 사용하게 된다. 이러한 무기질 혼화재는 시멘트에 첨가 사용시 콘크리트의 강도, 수축, 내구성 등에 영향을 주게 되는데 이러한 재료들의 특성상 초기 시멘트와의 반응성이 낮아 초기 압축강도가 작게 나오는 단점이 있다.In order to manufacture general strength concrete (150 ~ 400 kgf / cm 2 ), it is mainly used to replace a certain amount of cement in concrete to manufacture inorganic admixtures such as industrial by-product slag and fly ash. These inorganic admixtures affect the strength, shrinkage, durability, etc. of the concrete when used in addition to cement. Due to the characteristics of these materials, the initial compressive strength is low due to the low reactivity with the initial cement.

또한 고강도 콘크리트를 제조하기 위하여 실리카흄과 같은 포졸란 재료를 시멘트 혼화재로 사용하기도 하는데 이유는 이들 포졸란 재료에 활성실리카(Soluble SiO2)가 함유되어 있어 시멘트가 수화(水和)하는 동안에 이들 활성실리카가 시멘트중의 유리 수산화 칼슘과 결합하여 규산칼슘계의 수화물을 생성하면서 콘크리트의 강도를 증진시켜 줄 수 있기 때문이다. 이렇게 시멘트에서 생성되어진 수산화칼슘과 포졸란재료가 반응하여 규산칼슘계의 수화물을 생성하는 반응을 포졸란 반응(pozzolan reaction)이라 하며 상기 한 포졸란 재료 중 콘크리트 강도 증진용으로는 활성 실리카를 많이 함유하고 있는 실리카흄이 가장 우수한 것으로 알려져 있다.In order to produce high-strength concrete, pozzolanic materials such as silica fume are also used as cement admixtures because the active silica (Soluble SiO 2 ) is contained in these pozzolanic materials. This is because the strength of the concrete can be enhanced by combining with free calcium hydroxide in the form of calcium silicate hydrate. The reaction of calcium hydroxide and pozzolanic material produced in cement to form calcium silicate hydrate is called pozzolan reaction, and silica fume containing a lot of active silica is used to enhance the strength of concrete. It is known to be the best.

특히 400~800kgf/cm2의 높은 압축강도를 발현하기 위해서는 실리카흄이 가장 적합한 것으로 알려져 있다.In particular, it is known that silica fume is most suitable for expressing a high compressive strength of 400 ~ 800kgf / cm 2 .

실리카흄은 철과 실리콘의 합금인 훼로실리콘(ferrosilicon) 이나 금속실리콘(silicon metal)제조시 부산물로 얻어지는 무정형 이산화규소(non-crystaline SiO2)인데 입자 크기가 시멘트 입자보다 작고 콘크리트의 강도 증진 특성이 매우 우수하나 생산되는 양이 한정되어 있고 가격이 비싸다는 단점이 있다.Silica fume is an amorphous silicon dioxide (non-crystaline SiO 2 ) obtained as a by-product of the production of ferrosilicon or silicon metal, an alloy of iron and silicon. It is excellent but has a disadvantage in that the quantity produced is limited and the price is high.

따라서 이 분야에서는 콘크리트 강도 증진용 첨가제로서 우수한 특성을 나타내면서 구득이 용이하고 저가인 대체물질의 개발이 요망되는 실정에 있다.Therefore, in this field, it is desired to develop an alternative material which is easy to obtain and inexpensive while showing excellent properties as an additive for enhancing concrete strength.

본 발명의 목적은 콘크리트 제조용 시멘트 조성물에 있어서, 콘크리트의 강도증진용 첨가제로 고가의 실리카흄 대신에 구득이 용이하고 가격이 싼 실리카흄 대체 물질을 사용하면서 강도가 우수한 콘크리트를 제조할 수 있는 시멘트 조성물을 제공하는데 있다. 또한 일반강도 및 고강도 콘크리트 제조용 시멘트 조성물에 있어서 사용되어지는 슬래그 및 플라이애쉬의 초기강도 및 장기내구성을 증진시키기 위해 첨가되어지는 재료를 제공하는데 있다. An object of the present invention is to provide a cement composition capable of producing high-strength concrete in the cement composition for producing concrete, using an easy-to-purchase and inexpensive silica fume substitute instead of expensive silica fume as an additive for increasing strength of concrete. It is. In addition, to provide a material that is added to improve the initial strength and long-term durability of the slag and fly ash used in the cement composition for the production of general strength and high strength concrete.

본 발명자들은 국내외에 매장량이 풍부한 카올린(Kaolin)광물로부터 얻어지는 메타카올린(metakaolin)과 함께 적절한 감수제등의 첨가제를 사용하여 시멘트 조성물을 조성시켜주게 되면 슬래그 및 플라이애쉬 와 혼합사용시 초기 압축강도 증진되어지는 효과를 얻을 수 있었으며 실리카흄을 사용한 시멘트 조성물로 제조한 콘크리트와 거의 유사하거나 더 높은 강도의 콘크리트를 얻을 수 있는 것을 확인하고 본 발명을 완성하게 되었다. The inventors of the present invention, when the cement composition is formed by using an additive such as a suitable sensitizer together with metakaolin obtained from kaolin minerals rich in domestic and foreign reserves, the initial compressive strength is increased when mixed with slag and fly ash. The effect was obtained, and the present invention was completed by confirming that concrete having a strength similar to or higher than that of the concrete prepared from the cement composition using silica fume was obtained.

본 발명은 시멘트, 모래, 골재, 감수제 등으로 조성되는 콘크리트 제조용 조성물에 있어서, 시멘트 중량의 5~25wt%를 메타카올린으로 대체하고 고성능 감수제를 0.5~3.0% 중량부를 포함시켜 조성되는 콘크리트 제조용 시멘트 조성물에 관한 것이다. The present invention, in the composition for producing concrete, which is composed of cement, sand, aggregate, water reducing agent, etc., 5-25 wt% of the cement weight is replaced by metakaolin and cement composition for concrete production comprising 0.5 to 3.0% by weight of a high performance water reducing agent It is about.

상기 고성능감수제는 나프탈렌계 고성능감수제를 단독으로 사용하거나 나프탈렌계 고성능감수제가 80~90중량%이고, 폴리카르복실산계 고성능감수제가 5~20%로 이루어진 혼합조성으로 사용할 수도 있다. The high-performance reducing agent may be used alone or naphthalene-based high-performance reducing agent 80 to 90% by weight, polycarboxylic acid-based high-performance reducing agent may be used in a mixed composition consisting of 5 to 20%.

콘크리트 제조용 시멘트 조성물에 사용되는 감수제의 감수율은 일반적으로 10~15%정도이나 그중 감수율이 20~30%인 것을 이 분야에서는 고성능 감수제라 한다. 이러한 고성능감수제의 종류에는 음이온, 양이온, 비이온 및 양성 계면활성제로 분류할 수 있으며, 본 발명에서는 나프탈렌계 고성능 감수제로 음이온 계면활성제의 일종인 나프탈렌 설포네이트 나트륨염을 사용하였다. 또한 폴리카르복실산계 고성능 감수제로서는 폴리아크릴산, 아크릴릭에스테르, 말레인산의 혼합물을 사용하였다. The susceptibility of the water reducing agent used in the cement composition for concrete manufacture is generally 10-15%, of which the water reduction rate is 20-30%, in this field, is called a high performance water reducing agent. Types of such high performance sensitizers can be classified into anionic, cationic, nonionic and amphoteric surfactants. In the present invention, naphthalene sulfonate sodium salt, which is a kind of anionic surfactant, is used as a naphthalene-based high performance sensitizer. As the polycarboxylic acid-based high performance water reducing agent, a mixture of polyacrylic acid, acrylic ester and maleic acid was used.

사용된 메타카올린 포졸란 재료는 Al2O3와 비정질의 SiO2가 주 구성성분이며 물과 반응하여 수화시 포졸란 반응성을 나타낸다. 실리카흄이나 플라이애쉬 포졸란 재료와는 달리 수화 초기 단계에서 반응속도가 빨라 초기강도가 증진되며, 장기에 있어서는 시멘트 수화 과정시 발생하는 Ca(OH)2와 반응하여 C-A-S-H (Calcium alminium silicate hydroxide) 수화물을 생성하여 일반적인 시멘트를 이용하여 제조한 콘크리트에 비하여 공극을 치밀하게 하여 강도증진 효과를 나타낸다. 메타카올린의 물리 화학적 성질은 표1과 같다.The metakaolin pozzolanic material used is Al 2 O 3 and amorphous SiO 2 as the main component and reacts with water to show pozzolanic reactivity upon hydration. Silica fume or fly ash pozzolan material, as opposed sign and the reaction rate, the initial strength increase faster at an early stage, to In Cement Hydration Reaction Ca (OH) 2 and occurring during the process to long-term CASH (Calcium alminium silicate hydroxide) produced a hydrate Compared to concrete manufactured using general cement, the pores are densified to show the effect of increasing strength. The physicochemical properties of metakaolin are shown in Table 1.

메타카올린의 물리 화학적 성질Physicochemical Properties of Metakaolin 조성(wt%)Composition (wt%) 비표면적(㎠/g)Specific surface area (㎠ / g) 비중importance 색깔Color SiO2 SiO 2 Al2O3 Al 2 O 3 Fe2O3 Fe 2 O 3 MgOMgO CaOCaO TiO2 TiO 2 50~5550-55 40~4540-45 2.42.4 0.30.3 2.42.4 0.20.2 10,000~12,00010,000-12,000 2.62.6 황색yellow

(실시예)(Example)

이하 실시예를 들어 본 발명을 구체적으로 설명한다.The present invention will be described in detail with reference to the following Examples.

1) 슬래그 및 플라이애쉬 혼화재를 사용하여 일반강도 콘크리트를 제조하기 위하여 다음과 같은 조성으로 시멘트 조성물을 제조하고 콘크리트 배합설계를 하였다. 1) In order to manufacture general-strength concrete using slag and fly ash admixture, cement composition was prepared with the following composition and concrete mixing design was made.

시멘트 조성물의 조성내용Composition of Cement Composition

시멘트 조성물A : 보통 포틀랜드시멘트 80중량부와 플라이애쉬 20중량부 및 나프탈렌계 고성능 감수제 1.5중량부로 조성된 시멘트 조성물Cement composition A: Cement composition usually composed of 80 parts by weight of Portland cement, 20 parts by weight of fly ash and 1.5 parts by weight of naphthalene-based high performance water reducing agent

시멘트 조성물B : 보통 포틀랜드시멘트 73중량부, 플라이애쉬 20중량부, 메타카올린 7중량부 및 고성능 감수제 1.5중량부로 조성된 시멘트 조성물 Cement composition B: Cement composition usually composed of 73 parts by weight of Portland cement, 20 parts by weight of fly ash, 7 parts by weight of metakaolin and 1.5 parts by weight of a high performance water reducing agent.

시멘트 조성물C : 보통 포틀랜드시멘트 80중량부와 슬래그 20중량부 및 나프탈렌계 고성능 감수제 1.5중량부로 조성된 시멘트 조성물 Cement composition C: Cement composition usually composed of 80 parts by weight of Portland cement, 20 parts by weight of slag, and 1.5 parts by weight of naphthalene-based high performance water reducing agent

시멘트 조성물D : 보통 포틀랜드시멘트 73중량부, 슬래그 20중량부, 메타카올린 7중량부 및 고성능 감수제 1.5중량부로 조성된 시멘트 조성물 Cement composition D: Cement composition usually composed of 73 parts by weight of Portland cement, 20 parts by weight of slag, 7 parts by weight of metakaolin and 1.5 parts by weight of high performance water reducing agent.

물 8wt%, 시멘트 조성물 15wt%, 모래 33wt%, 골재 44wt%의 비율로 콘크리트를 배합설계하고 초기 콘크리트 슬럼프는 18cm로 하여 상기한 각각의 시멘트 조성물로 콘크리트 시편을 제조하였다. 사용된 재료들의 양은 다음 표 2에 나타낸바와 같다. 다음표들에서 결합재는 시멘트 조성물을 나타낸것이다.Concrete specimens were prepared by mixing concrete at a ratio of 8 wt% of water, 15 wt% of cement composition, 33 wt% of sand, and 44 wt% of aggregate, and having an initial concrete slump of 18 cm. The amount of materials used is shown in Table 2 below. The binders in the following tables represent cement compositions.

콘크리트의 배합설계Concrete design 시편명Psalm Name 시멘트조성물Cement composition 중량(kg/m3)Weight (kg / m 3 ) 물water 결합재Binder 모래sand 골재aggregate 1One AA 180180 353353 757757 10081008 22 BB 180180 353353 757757 10081008 33 CC 180180 353353 757757 10081008 44 DD 180180 353353 757757 10081008

2) 400~800 kgf/cm2 정도의 고강도 콘크리트를 제조하기 위하여 다음과 같은 조성으로 시멘트 조성물을 제조하고 콘크리트배합설계를 하였다.2) In order to manufacture high strength concrete of 400 ~ 800 kgf / cm 2 , cement composition was prepared with the following composition and concrete mixture design was made.

시멘트 조성물의 조성내용Composition of Cement Composition

시멘트조성물 E : 보통포틀랜드시멘트 및 나프탈렌계 고성능 감수제 2.5 중량부로 조성된 시멘트 조성물Cement composition E: Cement composition composed of 2.5 parts by weight of ordinary portland cement and naphthalene-based high performance water reducing agent

시멘트조성물 F : 보통포틀랜드시멘트 90중량부와 실리카흄 10중량부 및 나프탈렌계 고성능 감수제 2.5중량부로 조성된 시멘트조성물.Cement composition F: Cement composition composed of 90 parts by weight of ordinary Portland cement, 10 parts by weight of silica fume and 2.5 parts by weight of naphthalene-based high performance water reducing agent.

시멘트조성물 G : 보통포틀랜드 시멘트 90중량부와 메타카올린 10중량부 및 나프탈렌계 고성능 감수제 2.5중량부로 조성된 시멘트조성물.Cement composition G: Cement composition composed of 90 parts by weight of ordinary Portland cement, 10 parts by weight of metakaolin and 2.5 parts by weight of naphthalene-based high performance water reducing agent.

시멘트조성물 H : 보통포틀랜드시멘트 90중량부와 메타카올린 10중량부 및 나프탈렌계 고성능 감수제 80중량%와 폴리카르복실산계 고성능 감수제 20중량%를 혼합한 혼합감수제 2.5중량부로 조성된 시멘트 조성물.Cement composition H: A cement composition composed of 2.5 parts by weight of a mixed water reducing agent, in which 90 parts by weight of ordinary portland cement, 10 parts by weight of metakaolin, 80% by weight of a naphthalene-based high performance water reducing agent and 20% by weight of a polycarboxylic acid-based high performance water reducing agent are mixed.

물 7wt%, 시멘트 조성물 21wt%, 모래 30wt%, 골재 42wt%의 비율로 콘크리트를 배합설계하고 상기한 각각의 시멘트 조성물로 콘크리트 시편을 제조하였다. 사용된 재료들의 양은 다음 표 3에 나타낸바와 같다.The concrete was designed in a proportion of 7 wt% water, 21 wt% cement composition, 30 wt% sand, and 42 wt% aggregate, and concrete specimens were prepared from the respective cement compositions. The amount of materials used is shown in Table 3 below.

콘크리트의 배합설계Concrete design 시편명Psalm Name 시멘트조성물Cement composition 중량(kg/m3)Weight (kg / m 3 ) 물water 결합재Binder 모래sand 골재aggregate 55 EE 150150 500500 719719 10041004 66 FF 150150 500500 716716 10011001 77 GG 150150 500500 719719 10041004 88 HH 150150 500500 719719 10041004

메타카올린은 다른 포졸란 재료와 마찬가지로 알카리 성분이 존재하게 되면 수화가 촉진되어 시멘트와 반응하게 되는데 시멘트와 치환율이 5%이하에서는 강도증진 효과가 작으며, 25% 이상을 초과하면 수화과정의 지연으로 초기 압축강도 저하효과가 나타나는 등 콘크리트의 품질 관리에 영향을 줄 수 도 있다. 따라서 적정 메타카올린 사용량은 사용되는 포틀랜드 시멘트양과 플라이애쉬 및 슬래그의 양에 따라 5~25wt%가 가장 적절하다. As with other pozzolanic materials, metakaolin reacts with cement to promote hydration when the presence of an alkaline component is present.When the cement and substitution rate are less than 5%, the strength-improving effect is small. It can also affect the quality control of concrete, such as lowering compressive strength. Therefore, the optimal amount of metakaolin is 5 ~ 25wt% depending on the amount of Portland cement used and the amount of fly ash and slag.

감수제는 나프탈렌계 고성능감수제를 사용하였으며 메타카올린의 빠른 유동성 감소 및 장기압축강도를 증진시키기 위하여 나프탈렌계 및 폴리카르복실산계 고성능감수제를 혼합하여 사용하였다. 메타카올린 재료는 재료특성 상 초기 수분 흡수율이 빠르기 때문에 실리카흄 재료에 고성능감수제를 사용하는 것에 비하여 수분 흡수율이 빨라 감수제가 빠르게 소모되어 콘크리트의 점도가 증가되는 경향이 있다. 이러한 콘크리트의 유동성을 나프탈렌계 및 폴리카르복실산계 유기혼화제를 같이 사용하므로서 유동성을 향상시킬 수 있으며, 또한 폴리카르복실산계 감수제 성분이 메타카올린의 수화를 촉진시켜 강도가 크게 증가될 수 있었다. 나프탈렌계와 폴리카르복실산계 감수제의 사용량은 시멘트와 메타카올린 첨가량에 따라 변경될 수 있으나 초기 슬럼프 및 플로우를 얻기위해서는 나프탈렌계 고유동화제의 양이 중량부 80% 이상이어야 하며, 또한 메타카올린의 수화촉진을 위해서는 폴리카르복실산계 감수제의 양이 5%이상 첨가되어야 한다. 또한 콘크리트에 첨가되는 유기감수제의 양은 사용시멘트 및 메타카올린의 첨가량에 따라 0.5~3.0 % 중량부 사이에서 조절하는 것이 가장 이상적이다. Naphthalene-based high-performance sensitizer was used as a sensitizer, and naphthalene-based and polycarboxylic acid-based high-performance sensitizers were used in order to rapidly reduce the fluidity of metakaolin and enhance the long-term compressive strength. Since metakaolin material has a high initial moisture absorption rate due to the material properties, the water absorption rate is faster than that of the high performance water reducing agent used in the silica fume material, and the viscosity of the concrete tends to increase due to the rapid consumption of the water reducing agent. The fluidity of the concrete can be improved by using the naphthalene-based and polycarboxylic acid-based organic admixture together, and the polycarboxylic acid-based water reducing agent component can promote the hydration of metakaolin, which can greatly increase the strength. The amount of naphthalene-based and polycarboxylic acid-based water reducing agent may be changed depending on the amount of cement and metakaolin added, but the amount of naphthalene-based high-flowing agent must be 80% by weight or more in order to obtain initial slump and flow, and the hydration of metakaolin For promotion, the amount of polycarboxylic acid-based water reducing agent should be added at least 5%. In addition, the amount of the organic sensitizer added to the concrete is ideally adjusted between 0.5 to 3.0% by weight depending on the amount of cement and metakaolin used.

다음은 실시예에 따른 결과이다. The following are the results according to the example.

플라이애쉬 및 슬래그를 사용한 일반강도 콘크리트 제조시 시멘트 조성물에 메타카올린을 첨가한 콘크트의 재령별 압축강도 시험결과는 표 4에 나타내었다. The compressive strength test results of each age of the concrete added with metakaolin to the cement composition in the manufacture of general strength concrete using fly ash and slag are shown in Table 4.

표 4에서 보면 시편 2의 경우 플라이애쉬를 단독 첨가한 것보다 메타카올린을 플라이애쉬와 함께 첨가하여 제조한 콘크리트가 초기 압축강도 증가율이 높은 것을 알 수 있다. 이것은 슬래그를 첨가한 시편 4에서도 마찬가지로 초기 압축강도가 증가하는 현상을 보이는 것을 알 수 있다. 이것은 메타카올린이 다른 혼화재에 비하여 초기 수화율이 높은 것을 보여주고 있다.In Table 4, it can be seen that in the case of Specimen 2, the concrete prepared by adding metakaolin together with the fly ash has a higher initial compressive strength than the fly ash alone. It can be seen that the initial compressive strength also increased in specimen 4 with slag added. This shows that metakaolin has a higher initial hydration rate than other admixtures.

본 발명의 시멘트조성물을 조성함에 있어서, 시멘트 중량의 5~25중량%를 플라이애쉬 또는 슬래그와 치환시켜 제조할 경우 메타카올린을 첨가하면 초기 압축강도 증진율이 높아질 수 있으며 여기에 0.5~3.0중량%의 고성능 감수제를 첨가하여 시멘트조성물을 조정할 수도 있다.      In the composition of the cement composition of the present invention, when prepared by replacing 5 to 25% by weight of the cement with fly ash or slag, the addition of metakaolin may increase the initial compressive strength increase rate, and 0.5 to 3.0% by weight The cement composition may be adjusted by adding a high performance water reducing agent.

제조된 콘크리트의 재령별 압축강도 특성 (단위 : kgf/cm2)Characteristics of compressive strength by age of manufactured concrete (Unit: kgf / cm 2 ) 시편명Psalm Name 3일3 days 7일7 days 14일14 days 28일28 days 1One 8585 183183 234234 265265 22 109109 225225 255255 279279 33 9090 190190 243243 267267 44 114114 233233 263263 283283

고강도 콘크리트를 제조하기 위한 시멘트 조성물을 사용한 굳지않은 콘크리트의 슬럼프 및 슬럼프 플로우 측정 시험결과는 표 5와 같으며 재령별 압축강도 시험결과는 표 6에 나타내었다. The slump and slump flow measurement test results of the hardened concrete using the cement composition for producing high strength concrete are shown in Table 5, and the compressive strength test results for each age are shown in Table 6.

표 5에서 보면 실리카흄을 대신하여 메타카올린을 사용한 시편7의 경우 슬럼프 유지 성능이 실리카흄과 유사한 것을 알 수 있으며 플로우는 실리카흄을 사용한 경우에 비하여 다소 감소하는 것을 알 수 있다. 또한 제조된 콘크리트의 압축강도 결과를 보면 메타카올린을 사용한 시편 7의 경우 실리카흄을 사용한 시편 6의 경우와 유사한 압축강도를 발현하는 것을 알 수 있으며 초기 3일, 7일에서 압축강도가 다소 더 높은 것을 알 수 있다. 이것은 메타카올린 재료의 특성으로서 수화 초기에 시멘트 수화물인 에트린자이트나 모노설페이트를 실리카흄을 첨가한 시편에 비하여 다량으로 생성시키며 일반적인 보통포틀랜드시멘트 수화물인 C-S-H상과 더불어 C-A-S-H 수화물을 생성하여 공극을 더욱더 치밀하게 하기 때문에 강도가 더 증진되어진 것으로 나타났다. 시편의 8의 경우에는 유기혼화제를 변경하여 제조한 것으로써 슬럼프 및 슬럼프 플로우 유지에 있어서 크게 개선되어진 것을 볼 수 있으며 압축강도 또한 크게 향상되어지는 것을 알 수 있는데 이것은 폴리카르본산계 유기혼화제가 메타카올린의 성분 용출을 촉진시켜 강도증진 효과에 큰 영향을 준 것으로 추정된다. In Table 5, the specimen 7 using metakaolin instead of silica fume shows that the slump retention performance is similar to that of silica fume, and the flow decreases slightly compared with the case of using silica fume. In addition, the results of the compressive strength of the prepared concrete showed that the specimen 7 using metakaolin showed similar compressive strength to that of specimen 6 using silica fume. Able to know. This is a characteristic of metakaolin material, which produces a large amount of cement hydrate, etrinzine or monosulfate, compared to the sample added with silica fume in the early stage of hydration. It was shown that the strength was increased further. In case 8 of the specimen, the organic admixture was changed to show that the slump and the slump flow were greatly improved, and the compressive strength was also greatly improved. It is believed that the elution of components has greatly influenced the effect of strength enhancement.

굳지 않은 콘크리트의 슬럼프 및 슬럼프 플로우 경시변화Changes in Slump and Slump Flow of Unconsolidated Concrete 시편명Psalm Name 공기량(%)Air volume (%) 슬럼프(cm)Slump (cm) 슬럼프 플로우(cm)Slump Flow (cm) 초기Early 30분30 minutes 60분60 minutes 초기Early 30분30 minutes 60분60 minutes 55 5.35.3 24.024.0 20.020.0 15.015.0 5858 3535 2727 66 6.16.1 24.024.0 21.521.5 19.019.0 5555 4040 3535 77 5.95.9 24.524.5 21.021.0 18.018.0 5858 3636 3030 88 5.95.9 25.025.0 24.524.5 24.024.0 6060 5656 5151

제조된 콘크리트의 재령별 압축강도 특성 (단위 : kgf/cm2)Characteristics of compressive strength by age of manufactured concrete (Unit: kgf / cm 2 ) 시편명Psalm Name 1일1 day 3일3 days 7일7 days 28일28 days 90일90 days 55 170170 350350 410410 531531 570570 66 207207 335335 429429 600600 634634 77 205205 352352 460460 590590 630630 88 216216 375375 535535 699699 730730

도 1은 본 발명 실시예에서 얻어진 시편들의 경과시간에 따른 슬럼프플로우의 변화를 나타낸 그래프이다.1 is a graph showing a change in slump flow with the elapsed time of the specimens obtained in the embodiment of the present invention.

도 2는 본 발명 실시예에서 얻어진 시편들의 재령별 압축강도를 나타낸 그래프이다.2 is a graph showing the compressive strength for each age of the specimens obtained in the embodiment of the present invention.

본 발명의 시멘트 조성물은 고가의 실리카흄을 사용하지 않고서도 고강도 콘크리트를 제조할 수 있는 효과가 있다. 또한 실리카흄 이외에 혼화재료 슬래그 및 플라이애쉬를 시멘트 조성물에 혼합 첨가시 메타카올린을 혼합 첨가하면 초기압축강도 증가효과가 있다. The cement composition of the present invention has the effect of producing high-strength concrete without using expensive silica fume. In addition, when the mixed material slag and fly ash in addition to the silica fume in the cement composition mixed with the addition of metakaolin there is an effect of increasing the initial compressive strength.

도 1은 본 발명 실시예에서 얻어진 시편들의 경과시간에 따른 슬럼프플로우의 변화를 나타낸 그래프이다.1 is a graph showing a change in slump flow with the elapsed time of the specimens obtained in the embodiment of the present invention.

도 2는 본 발명 실시예에서 얻어진 시편들의 재령별 압축강도를 나타낸 그래프이다.2 is a graph showing the compressive strength for each age of the specimens obtained in the embodiment of the present invention.

Claims (4)

콘크리트제조용 시멘트조성물에 있어서, 시멘트중량의 5~25중량%의 메타카올린과 5~25중량%의 플라이애쉬 또는 슬래그 와 0.5~3.0중량%의 나프타린계 고성능 감수제로 조성된 일반강도 콘크리트 제조용 시멘트 조성물.Cement composition for the production of concrete, cement composition for the production of general-strength concrete composed of 5 to 25% by weight of metakaolin, 5 to 25% by weight of fly ash or slag and 0.5 to 3.0% by weight of naphthalin-based high performance water reducing agent. 콘크리트 제조용 시멘트 조성물에 있어서, 시멘트 중량의 5~25중량%의 메타카올린과 0.5~3.0중량%의 나프타린계 고성능 감수제로 조성된 고강도 콘크리트 제조용 시멘트 조성물.A cement composition for producing high strength concrete, wherein the cement composition for producing concrete is composed of 5 to 25 wt% of metakaolin and 0.5 to 3.0 wt% of naphthalin-based high performance water reducing agent. 삭제delete 제 1항 또는 제 2항중 어느 한항에 있어서 고성능감수제가 나프탈렌계 고성능감수제 80~90wt%와 폴리카르복실산계 고성능감수제 10~20wt%를 혼합하여서된 것인 콘크리트 제조용 시멘트 조성물.The cement composition for producing concrete according to any one of claims 1 to 3, wherein the high performance reducing agent is a mixture of 80 to 90 wt% of a naphthalene-based high performance reducing agent and 10 to 20 wt% of a polycarboxylic acid-based high performance reducing agent.
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KR100686254B1 (en) * 2006-07-21 2007-02-22 주식회사 삼표 Composition for white-colored concrete having titanium dioxide-metakaolin pigment
KR100715179B1 (en) 2006-07-10 2007-05-08 (주)넥트 Hybrid repair mortar mixing method
KR101617723B1 (en) * 2015-12-11 2016-05-04 장산씨엠주식회사 Waterproof and anticorrosive composition for concrete
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KR100697221B1 (en) * 2005-08-29 2007-03-22 한국건설기술연구원 Composition for Shotcrete Having Excellent Performance Using Metakaolin
KR100880908B1 (en) * 2008-11-27 2009-02-04 임원순 Cement concrete composite and pavement method for concrete bridge using the same
KR101309088B1 (en) * 2011-06-29 2013-09-16 오씨아이 주식회사 Concrete comprising superplasticizer combined carbon amino silica black
CN112794667A (en) * 2021-01-08 2021-05-14 江苏金木土科技有限公司 Composite modified high-activity ultrafine fly ash and preparation method thereof

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Publication number Priority date Publication date Assignee Title
KR100715179B1 (en) 2006-07-10 2007-05-08 (주)넥트 Hybrid repair mortar mixing method
KR100686254B1 (en) * 2006-07-21 2007-02-22 주식회사 삼표 Composition for white-colored concrete having titanium dioxide-metakaolin pigment
KR101617722B1 (en) * 2015-12-10 2016-05-04 장산씨엠주식회사 Waterproofing Admixture Composition for Concrete
KR101617723B1 (en) * 2015-12-11 2016-05-04 장산씨엠주식회사 Waterproof and anticorrosive composition for concrete

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