KR20020060831A - manufacturing method of readymix concrete - Google Patents

manufacturing method of readymix concrete Download PDF

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Publication number
KR20020060831A
KR20020060831A KR1020010001877A KR20010001877A KR20020060831A KR 20020060831 A KR20020060831 A KR 20020060831A KR 1020010001877 A KR1020010001877 A KR 1020010001877A KR 20010001877 A KR20010001877 A KR 20010001877A KR 20020060831 A KR20020060831 A KR 20020060831A
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South Korea
Prior art keywords
concrete
mixed concrete
ready mixed
amount
water
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KR1020010001877A
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Korean (ko)
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KR100624364B1 (en
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오종택
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인선이엔티 주식회사
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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
    • 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
    • C04B18/16—Waste materials; Refuse from building or ceramic industry
    • C04B18/167—Recycled materials, i.e. waste materials reused in the production of the same 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
    • 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
    • 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
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/302—Water reducers
    • 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)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PURPOSE: Provided is a production method of ready mixed concrete which has improved compression strength compared with conventional ready mixed concrete without pre-wetting and increase of mixing water by using recycled aggregates. CONSTITUTION: The ready mixed concrete comprises 280-360kg/m¬3 concrete, 40-60% of water/concrete(W/C), 35-37% of fine recycled aggregates of which maximum size is 19-20mm and water absorption is less than 3%, 1-15% of silica fume, and optionally AE water reducing agent. The resultant ready mixed concrete has a 10% increase in compression strength compared with conventional ready mixed concrete.

Description

레디믹스트 콘크리트 제조방법{manufacturing method of readymix concrete}Manufacturing method of readymix concrete

본 발명은 레디믹스트 콘크리트의 제조방법에 관한 것이다.The present invention relates to a method for producing ready mixed concrete.

특히, 본 발명은 프리웨팅 및 배합수량의 증대가 불필요한 1종의 재생골재를 이용함으로서 골재표면에 부착된 모르타르와 새로이 배합되는 모르타르와의 부착력 증진과 공극의 충진 효과로 일반 레디믹스트 콘크리트에 비해 약 10% 이상의 개선된 강도발현이 가능토록 한 레디믹스트 콘크리트 제조방법에 관한 것이다.In particular, the present invention by using one type of recycled aggregate that does not need to increase the amount of prewetting and the amount of compounding is improved compared to the general ready-mixed concrete due to the improvement of adhesion between the mortar attached to the aggregate surface and the newly mixed mortar and filling of the pores The present invention relates to a method for producing ready-mixed concrete that enables improved strength development of 10% or more.

일반적으로, KS F 2573(콘크리트용 재생골재)에서 규정하고 있는 흡수율 5% 이상 2∼3종의 재생골재는 높은 흡수율로 인하여 재생골재를 콘크리트 배합공정에 투입하기 이전에 미리 프리웨팅을 실시하거나 혹은 10ℓ/㎥의 배합수량 증대가 선행되어야 만 동일한 시공연도(슬럼프)의 확보가 가능하다.In general, 2 ~ 3 types of recycled aggregates of 5% or more of absorption rate prescribed in KS F 2573 (concrete recycled aggregate) are pre-wetting before inputting recycled aggregate into concrete mixing process due to high absorption rate. It is possible to secure the same construction year (slump) only if the amount of compounding increases to 10ℓ / ㎥.

또한, 동일한 수준의 압축강도 발현을 위해서는 단위시멘트량의 증대를 필요로 하고 있다.In addition, in order to express the same level of compressive strength, it is necessary to increase the amount of unit cement.

그러나, 콘크리트의 시공성 확보를 위한 골재의 프리웨팅 처리 또는 배합수량의 증대는 결과적으로 콘크리트의 강도저하와 동결융해저항성 및 내구성의 저하를 수반하여 일반적인 콘크리트의 물리적인 특성저하가 우려된다는 문제점으로 그개선책이 지속적으로 요구되고 있는 실정이다.However, the prewetting treatment or increase of the amount of compounding aggregate to secure the workability of concrete consequently leads to the problem that the physical properties of the concrete are deteriorated due to the decrease in strength, freeze-thawing resistance and durability of the concrete. This situation is constantly being demanded.

본 발명은 상기의 문제해결을 위해 시도되어진 여러가지의 제조공정을 통해 흡수율 3% 이내의 1종 재생골재를 사용할 경우 골재의 프리웨팅 및 배합수량의 증대가 필요치 않다는 점을 발견하였고, 본 발명은 이러한 점에 착안되어 안출된 것이다.The present invention has found that when one type of recycled aggregate having an absorption rate of less than 3% is used through various manufacturing processes attempted to solve the above problems, it is not necessary to increase the amount of prewetting of the aggregate and increase the amount of compounding. It was conceived at the point.

따라서, 본 발명은 상기 언급한 흡수율 3% 이내의 1종 재생골재를 사용함으로서 골재의 프리웨팅 및 배합수량의 증대없이도 보통의 일반 콘크리트와 동일한 배합을 통해 적어도 동일수준 이상의 강도발현이 가능할 수 있는 레디믹스트 콘크리트 제조방법의 제공을 그 목적으로 하고 있다.Therefore, the present invention is a ready-to-use strength that can be at least the same level of strength through the same formulation as ordinary concrete without increasing the amount of prewetting and mixing amount of aggregate by using the first recycled aggregate within the above 3% absorption rate It is an object of the present invention to provide a method for producing mixed concrete.

상기의 목적은 단위시멘트량 280∼360㎏/㎥와; 물시멘트비 40∼60%와; 잔골재율 35∼37%와; 실리카흄 혼입율 1∼15%; 및 제품의 특성에 따라 현장배합되는 AE 감수제를 배합 가공함으로서 충분히 달성될 수 있을 것이다.The above object is the unit cement amount of 280 ~ 360kg / ㎥; Water cement ratio of 40 to 60%; Fine aggregate rate of 35 to 37%; Silica fume incorporation rate of 1 to 15%; And by blending the AE water reducing agent to be field blended according to the characteristics of the product.

본 발명의 콘크리트 제조방법은 이하에서 설명되는 바람직한 실시예를 통해 가장 양호한 상태로 재현될 수 있다.Concrete production method of the present invention can be reproduced in the best state through the preferred embodiment described below.

본 발명의 제조방법에 투입 적용되는 흡수율 3% 이내의 재생골재는 일반 콘크리트의 25㎜골재에 비해 그 최대입도를 19∼20㎜로 산정함이 바람직한데, 이러한 칫수는 재생골재의 생산특성과 강도발현을 고려할 때 가장 최적의 상태로 제시될 수 있다.Recycled aggregate within 3% absorption applied to the production method of the present invention is preferable to calculate the maximum particle size of 19 ~ 20㎜ compared to 25mm aggregate of general concrete, such dimensions are the production characteristics and strength of recycled aggregate Given the expression, it can be presented in the most optimal state.

이하의 실시예에서는 각기 상이한 설계기준강도에 따라 그에 적합한 최적의 배합비를 산출하여 보았다.In the following examples, the optimum blending ratio was calculated according to different design reference strengths.

〈실시예 1〉<Example 1>

설계기준강도가 150㎏ｆ/㎤의 경우,If the design reference strength is 150㎏ｆ / ㎠,

단위 시멘트량 : 280∼300㎏/㎥Unit Cement Amount: 280∼300㎏ / ㎥

물시멘트비 : 50∼60%Water Cement Ratio: 50 ~ 60%

잔골재율 : 35∼37%Fine Aggregate Rate: 35 ~ 37%

실리카흄 혼입율 : 1∼15%Silica fume incorporation rate: 1-15%

AE감수제 : 제품의 특성에 따라 현장배합.AE Supervisor: On-site combination based on product characteristics.

〈실시예 2〉<Example 2>

설계기준강도가 180㎏ｆ/㎤의 경우,If the design reference strength is 180㎏ｆ / ㎠,

단위 시멘트량 : 310∼320㎏/㎥Unit Cement Amount: 310 ~ 320㎏ / ㎥

물시멘트비 : 50∼54%Water Cement Ratio: 50 ~ 54%

잔골재율 : 35∼37%Fine Aggregate Rate: 35 ~ 37%

실리카흄 혼입율 : 1∼15%Silica fume incorporation rate: 1-15%

AE감수제 : 제품의 특성에 따라 현장배합.AE Supervisor: On-site combination based on product characteristics.

〈실시예 3〉<Example 3>

설계기준강도가 210㎏ｆ/㎤의 경우,If the design reference strength is 210㎏ｆ / ㎠

단위 시멘트량 : 320∼340㎏/㎥Unit Cement Amount: 320 ~ 340㎏ / ㎥

물시멘트비 : 47∼50%Water Cement Ratio: 47 ~ 50%

잔골재율 : 35∼37%Fine Aggregate Rate: 35 ~ 37%

실리카흄 혼입율 : 1∼15%Silica fume incorporation rate: 1-15%

AE감수제 : 제품의 특성에 따라 현장배합.AE Supervisor: On-site combination based on product characteristics.

〈실시예 4〉<Example 4>

설계기준강도가 240㎏ｆ/㎤의 경우,If the design reference strength is 240㎏ｆ / ㎠,

단위 시멘트량 : 340∼360㎏/㎥Unit Cement Amount: 340∼360㎏ / ㎥

물시멘트비 : 40∼45%Water Cement Ratio: 40 ~ 45%

잔골재율 : 35∼37%Fine Aggregate Rate: 35 ~ 37%

실리카흄 혼입율 : 1∼15%Silica fume incorporation rate: 1-15%

AE감수제 : 제품의 특성에 따라 현장배합.AE Supervisor: On-site combination based on product characteristics.

따라서, 본 발명은 굵은골재 최대입도 19∼20㎜와, 흡수율 3% 이내의 1종 재생골재를 사용함으로서 프리웨팅이나 배합수량의 증대없이 보통의 일반 콘크리트와 동일한 배합으로 약 10% 이상 개선된 우수한 압축강도를 발현하는 것이고, 재생골재 표면에 부착된 모르타르와 새로 배합된 모르타르와의 부착력 증가 및 내부의 공극이 충진된다는 유용성을 포함하고 있는 실시상의 가치를 갖는다.Therefore, the present invention uses a coarse aggregate maximum particle size of 19 ~ 20mm, and the recycled aggregate of less than 3% of the absorption rate by using the same recycled aggregate of ordinary concrete without the increase in the amount of pre-wetting or the amount of compounding of about 10% or more It expresses compressive strength and has practical value including the usefulness of increasing the adhesion between mortar adhering to the surface of recycled aggregate and the newly formulated mortar and filling the voids therein.

Claims (1)

단위시멘트량 280∼360㎏/㎥와; 물시멘트비 40∼60%와; 잔골재율 35∼37%와; 실리카흄 혼입율 1∼15%; 및 제품의 특성에 따라 현장배합되는 AE 감수제로 배합처리됨을 특징으로 하는 레디믹스트 콘크리트 제조방법.Unit cement amount of 280 to 360 kg / m 3; Water cement ratio of 40 to 60%; Fine aggregate rate of 35 to 37%; Silica fume incorporation rate of 1 to 15%; And A method of producing ready mixed concrete, characterized in that the compounding treatment with an AE water reducing agent that is field-mixed according to the characteristics of the product.
KR1020010001877A 2001-01-12 2001-01-12 manufacturing method of readymix concrete KR100624364B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100694225B1 (en) * 2004-10-14 2007-03-14 학교법인연세대학교 Monascus Pigment Possessing Lipase Inhibiting Activity
CN103711054A (en) * 2013-12-11 2014-04-09 常州市建筑科学研究院股份有限公司 Color recycled concrete road brick and preparation process thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101649262B1 (en) 2014-12-15 2016-08-18 홍익대학교세종캠퍼스산학협력단 Method for proportioning recycled aggregate concrete using equivalent mortar
IT202000031412A1 (en) * 2020-12-18 2022-06-18 TESIS srl PROCEDURE FOR THE DESIGN OF CEMENT MIXTURES WITH RECYCLED AGGREGATES

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04270155A (en) * 1991-01-21 1992-09-25 Shimizu Corp Composition for lightweight concrete
US5250113A (en) * 1991-07-31 1993-10-05 W. R. Grace & Co.-Conn. Dry castable concrete compositions and methods of preparing and dry casting the same
JPH0732351A (en) * 1993-07-16 1995-02-03 Mitsubishi Materials Corp Preparation of concrete of high strength
KR0120942B1 (en) * 1994-10-21 1997-10-27 유성용 Process for the preparation of concrete
KR0147002B1 (en) * 1995-12-22 1998-08-17 유성용 Process for preparing concrete

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100694225B1 (en) * 2004-10-14 2007-03-14 학교법인연세대학교 Monascus Pigment Possessing Lipase Inhibiting Activity
CN103711054A (en) * 2013-12-11 2014-04-09 常州市建筑科学研究院股份有限公司 Color recycled concrete road brick and preparation process thereof

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