KR102354482B1 - 24MPa Concrete Composition having Recycled Coarse Aggregates without Recycled Fine Aggregates - Google Patents

24MPa Concrete Composition having Recycled Coarse Aggregates without Recycled Fine Aggregates Download PDF

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KR102354482B1
KR102354482B1 KR1020210106751A KR20210106751A KR102354482B1 KR 102354482 B1 KR102354482 B1 KR 102354482B1 KR 1020210106751 A KR1020210106751 A KR 1020210106751A KR 20210106751 A KR20210106751 A KR 20210106751A KR 102354482 B1 KR102354482 B1 KR 102354482B1
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이세현
윤상혁
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한국건설기술연구원
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0032Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/06Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08Flue dust, i.e. fly ash
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/14Waste materials; Refuse from metallurgical processes
    • C04B18/141Slags
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/16Waste materials; Refuse from building or ceramic industry
    • C04B18/167Recycled materials, i.e. waste materials reused in the production of the same materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/30Water reducers, plasticisers, air-entrainers, flow improvers
    • C04B2103/304Air-entrainers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

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

Abstract

The relates to a 24 MPa grade recycled aggregate concrete composition using recycled coarse aggregate, which uses an expandable admixture at the same time as using circulating coarse aggregate, and not only can exhibit a design standard strength of 24 MPa and has a configuration for adjusting the content of recycled coarse aggregate in accordance with a scope of application of relaxation of a standard for a building floor area ratio according to a degree of volume ratio of the amount of recycled building material used, and thus the 24 MPa grade recycled aggregate concrete composition is suitable for application to utilization standards of the recycled building material.

Description

순환 굵은 골재의 사용비율에 따른 자철광 잔골재 함유 24MPa급 순환골재 콘크리트 조성물{24MPa Concrete Composition having Recycled Coarse Aggregates without Recycled Fine Aggregates}24 MPa Concrete Composition having Recycled Coarse Aggregates without Recycled Fine Aggregates}

본 발명은 순환골재로서 생산된 굵은 골재("순환 굵은 골재")를 포함하며 건축물의 골조 공사에 사용되는 콘크리트 조성물로서, 구체적으로는 순환골재 중에서 잔골재 즉, "순환 잔골재"의 사용을 배제하거나 억제함과 동시에, 팽창성 혼화제를 사용면서 목표로 하는 재활용 건축자재 사용량의 용적비율 정도에 따른 건축물 용적률 기준 완화 적용 범위에 맞추어서 순환골재로 생산된 굵은 골재의 함유량을 조절하는 구성을 가지며, 자철광으로 이루어진 잔골재를 함유하는 구성을 가지고 있어서, 재활용 건축자재의 활용기준에 맞추어서 현장 적용이 쉽고 적합한 "순환 굵은 골재의 사용비율에 따른 자철광 잔골재 함유 24MPa급 순환골재 콘크리트 조성물"에 관한 것이다. The present invention is a concrete composition that includes coarse aggregate produced as recycled aggregate (“recycled coarse aggregate”) and is used for framing of buildings, specifically, excludes or suppresses the use of fine aggregate, that is, “recycled fine aggregate,” among recycled aggregates. At the same time, while using an inflatable admixture, it has a configuration that adjusts the content of coarse aggregate produced from recycled aggregate in accordance with the scope of relaxation of the building floor area ratio standard according to the target volume ratio of the amount of recycled building material used, and fine aggregate made of magnetite Because it has a composition containing It relates to "recycled aggregate concrete composition".

건설폐기물에서부터 생산된 순환골재를 사용하는 콘크리트 조성물이 대한민국 등록특허 제10-1951431호 등에 의해 알려져 있다. 순환골재는 "순환 잔골재"와 "순환 굵은 골재"로 구분될 수 있다. 순환골재를 사용하는 콘크리트("순환골재 콘크리트")는 건축물의 골조 공사에도 사용될 수 있는데, 순환골재 콘크리트를 위한 조성물에서의 순환골재 사용량은 재활용 건축자재의 활용기준에 큰 영향을 준다. 국토교통부의 <재활용 건축자재의 활용기준> 고시에서는 재활용 건축자재 사용량의 용적비율 15 내지 25%에 따라 건축물 용적률 기준 완화 적용 범위를 정하고 있다. 편의상 이러한 건축물 용적률 기준 완화 적용 범위를 "적용 범위 비율"이라고 한다. 연면적 500제곱미터 이상의 건축물에서 기둥, 기초, 바닥, 벽, 보, 계단, 지붕 등의 골조를 구축하는 공사에 순환골재 콘크리트를 사용할 수 있는데, 이 경우 순환골재 사용량("순환골재량")에 따라 적용 범위 비율을 5 내지 15% 범위 내에서 정할 수 있다. 국토교통부의 상기한 <재활용 건축자재의 활용기준> 고시에 따르면, 부피비로서 순환골재량이 15% 이상일 경우에는 적용 범위 비율을 5%로 할 수 있고, 순환골재량이 20% 이상일 경우에는 적용 범위 비율을 10%로 할 수 있으며, 순환골재량이 25% 이상일 경우에는 적용 범위 비율을 15%로 할 수 있는 것이다. A concrete composition using recycled aggregate produced from construction waste is known by Korean Patent Registration No. 10-1951431 and the like. Recycled aggregate can be divided into "recycled fine aggregate" and "recycled coarse aggregate". Concrete using recycled aggregate (“recycled aggregate concrete”) can also be used for structural construction of buildings. The Ministry of Land, Infrastructure and Transport's <Utilization Standards for Recycled Building Materials> notice sets the scope of application for relaxation of the building floor area ratio standards according to 15 to 25% of the volume ratio of recycled building materials used. For convenience, the scope of application for relaxation of the building floor area ratio standard is referred to as the "applicability ratio". Recycled aggregate concrete may be used for construction of structures such as columns, foundations, floors, walls, beams, stairs, and roofs in buildings with a total floor area of 500 square meters or more. The ratio can be set within the range of 5 to 15%. According to the above-mentioned <Utilization Standards for Recycled Building Materials> notice of the Ministry of Land, Infrastructure and Transport, when the recycled aggregate amount is 15% or more by volume, the coverage ratio can be set to 5%, and when the recycled aggregate amount is 20% or more, the coverage ratio is increased It can be set to 10%, and when the amount of recycled aggregate is 25% or more, the coverage ratio can be set to 15%.

이와 같이 콘크리트용 골재로서 순환골재를 사용할 경우, 콘크리트 조성물에 포함되는 순환골재량에 따라 건축관련 법규에서 규정하고 있는 재활용 건축자재 사용량의 용적비율이 달라지고 용적률을 완화시킬 수 있는 적용 범위 비율이 변화되는 바, 건축물 시공에서의 경제성 향상을 위해서는 적용 범위 비율을 최대로 적용시킬 수 있는 최적의 순환골재량을 제시하는 것이 매우 중요하다. As such, when recycled aggregate is used as an aggregate for concrete, the volume ratio of recycled building materials used in the building-related laws and regulations varies depending on the amount of recycled aggregate included in the concrete composition, and the ratio of the coverage area that can alleviate the floor area ratio changes. Bar, it is very important to present the optimal amount of recycled aggregate that can maximize the application range ratio to improve economic feasibility in building construction.

대한민국 등록특허공보 제10-1951431호(2019. 02. 22. 공고).Republic of Korea Patent Publication No. 10-1951431 (published on February 22, 2019).

본 발명은 위와 같은 목적하게 개발된 것으로서, 구체적으로는 순환골재를 포함하면서 설계기준강도 24MPa을 만족시키는 순환골재 콘크리트 조성물로서, 순환골재 중에서 순환 잔골재의 사용을 배제하여 순환 잔골재 대신에 천연 잔골재를 이용하고, 순환골재로서 순환 굵은 골재를 이용하며, 적용 범위 비율을 최대로 적용시킬 수 있는 최적의 순환골재량을 가지는 콘크리트 조성물을 제공하는 것을 목적으로 한다. The present invention was developed for the above purpose, specifically, as a recycled aggregate concrete composition that satisfies the design standard strength of 24 MPa while including recycled aggregate, and uses natural fine aggregate instead of recycled fine aggregate by excluding the use of recycled fine aggregate among recycled aggregates. It aims to provide a concrete composition using recycled coarse aggregate as recycled aggregate and having an optimal amount of recycled aggregate that can maximize the application range ratio.

특히, 본 발명은 재활용 건축자재 사용량의 용적비율 별로 최적의 순환골재량으로 순환골재를 포함하되, 콘크리트의 물성을 극대화시킬 수 있도록 최적의 팽창성 혼화제 사용량을 가지며, 잔골재로서 자철광 잔골재를 사용함으로써 최적의 유동성과 강도 특성을 가지게 되는 순환골재 콘크리트 조성물을 제공하는 것을 목적으로 한다. In particular, the present invention includes recycled aggregate as an optimal amount of recycled aggregate for each volume ratio of recycled building material usage, but has an optimal amount of intumescent admixture to maximize the physical properties of concrete, and uses magnetite fine aggregate as fine aggregate for optimal fluidity An object of the present invention is to provide a recycled aggregate concrete composition having high strength characteristics.

위와 같은 과제를 달성하기 위하여 본 발명에서는, 물, 천연 잔골재, 자철광 잔골재, 천연 굵은 골재, 순환 굵은 골재, 바인더 및 팽창성 혼화제를 포함하는 조성을 가지며; 순환 굵은 골재량은 266 내지 465kg/㎥이고; 천연 굵은 골재량은 386 내지 586kg/㎥이며; 순환 굵은 골재와 천연 굵은 골재의 혼합비는 3:7 내지 5:5이고; 자철광 잔골재의 함유량은 93.6 내지 280.8kg/㎥인 것을 특징으로 하는 순환골재 콘크리트 조성물이 제공된다. In order to achieve the above object, in the present invention, it has a composition including water, natural fine aggregate, magnetite fine aggregate, natural coarse aggregate, recirculating coarse aggregate, binder and expandable admixture; The recycled coarse aggregate amount is 266 to 465 kg/m3; The amount of natural coarse aggregate is 386 to 586 kg/m3; The mixing ratio of recycled coarse aggregate and natural coarse aggregate is 3:7 to 5:5; There is provided a recycled aggregate concrete composition, characterized in that the content of the magnetite fine aggregate is 93.6 to 280.8 kg / ㎥.

본 발명의 순환골재 콘크리트 조성물에 있어서, 설계기준강도는 24MPa이고; 순환골재의 함유량은 목표로 하는 적용 범위 비율에 따라 달라지는데; 목표로 하는 적용 범위 비율이 5%일 경우에는 순환 굵은 골재량은 266 내지 286kg/㎥이고 천연 굵은 골재량은 566 내지 586kg/㎥이며; 목표로 하는 적용 범위 비율이 10%일 경우에는 순환 굵은 골재량은 353 내지 373kg/㎥이고 천연 굵은 골재량은 476 내지 496kg/㎥이고; 목표로 하는 적용 범위 비율이 15%일 경우에는 순환 굵은 골재량은 445 내지 465kg/㎥이고 천연 굵은 골재량은 386 내지 406kg/㎥로 될 수 있다. In the recycled aggregate concrete composition of the present invention, the design reference strength is 24 MPa; The content of recycled aggregate depends on the target coverage ratio; When the target coverage ratio is 5%, the recycled coarse aggregate amount is 266-286 kg/m3, and the natural coarse aggregate amount is 566-586 kg/m3; When the target coverage ratio is 10%, the recycled coarse aggregate amount is 353 to 373 kg/m3 and the natural coarse aggregate amount is 476 to 496 kg/m3; When the target coverage ratio is 15%, the recycled coarse aggregate amount may be 445 to 465 kg/m3 and the natural coarse aggregate amount to be 386 to 406 kg/m3.

또한 본 발명의 순환골재 콘크리트 조성물에 있어서, 바인더는 340 내지 360kg/㎥으로 포함될 수 있고, 더 나아가 콘크리트의 설계기준강도는 24MPa이고; 바인더는 시멘트이거나 또는, 고로슬래그 미분말과 플라이애시가 모두 또는 선택적으로 시멘트에 혼합된 것일 수 있다. 또한 본 발명의 순환골재 콘크리트 조성물에 있어서, 팽창성 혼화제는 2.35 내지 2.55kg/㎥ 범위에서 바인더(분체) 100중량부에 대하여 0.5 내지 1.5중량부로 함유될 수 있고, AE제(공기연행제)가 0.10 내지 0.15g/㎥으로 더 함유될 수도 있으며, 물의 함유량은 150 내지 170kg/㎥로 될 수 있고, 천연 잔골재의 함유량은 655.3 내지 842.5kg/㎥로 될 수 있다. In addition, in the recycled aggregate concrete composition of the present invention, the binder may be included in 340 to 360kg / ㎥, further, the design standard strength of the concrete is 24MPa; The binder may be cement, or both fine blast furnace slag powder and fly ash or selectively mixed with cement. In addition, in the recycled aggregate concrete composition of the present invention, the expandable admixture may be contained in an amount of 0.5 to 1.5 parts by weight based on 100 parts by weight of the binder (powder) in the range of 2.35 to 2.55 kg / ㎥, and the AE agent (air entraining agent) is 0.10 to 0.15 g/m 3 may be further contained, the water content may be 150 to 170 kg/m 3 , and the content of natural fine aggregate may be 655.3 to 842.5 kg/m 3 .

본 발명에 따른 순환골재 콘크리트 조성물에는, 최적의 순환골재량으로 순환골재가 포함되어 있는 바, 본 발명의 순환골재 콘크리트 조성물을 이용하여 건축물을 구축하는 경우, 적용 범위 비율을 최대로 할 수 있게 되고, 그에 따라 건축물 시공 경제성을 크게 향상시킬 수 있게 되는 효과가 발휘된다. Since the recycled aggregate concrete composition according to the present invention contains recycled aggregate as an optimal amount of recycled aggregate, when a building is constructed using the recycled aggregate concrete composition of the present invention, the application range ratio can be maximized, Accordingly, the effect of significantly improving the economic efficiency of building construction is exhibited.

특히, 본 발명에 따른 순환골재 콘크리트 조성물은, 최적의 사용량으로 팽창성 혼화제를 포함하고 있는 바, 재활용 건축자재 사용량의 용적비율 별로 최적의 순환골재량으로 순환골재를 포함하면서도 순환골재의 사용에 따른 단점을 최소화시켜서 콘크리트의 물성을 극대화시킬 수 있게 되는 장점을 가지게 된다. In particular, the recycled aggregate concrete composition according to the present invention contains an inflatable admixture in an optimal amount, and contains recycled aggregate as an optimal amount of recycled aggregate for each volume ratio of the amount of recycled building material used. It has the advantage of being able to maximize the physical properties of concrete by minimizing it.

이하, 본 발명의 바람직한 실시예를 설명한다. 그러나 해 본 발명의 기술적 사상과 그 핵심 구성 및 작용은 예시된 실시예에 한정되는 것은 아니다. Hereinafter, preferred embodiments of the present invention will be described. However, the technical spirit of the present invention and its core configuration and operation are not limited to the illustrated embodiments.

본 발명에 따른 순환골재 콘크리트 조성물은, 설계기준강도 24MPa을 기준으로 하여 적용 범위 비율을 최대로 할 수 있는 최적의 순환골재량으로 순환골재를 포함하고 있는 것으로서, 구체적으로는 물, 천연 잔골재, 자철광 잔골재, 천연 굵은 골재, 순환골재로 이루어진 굵은 골재, 바인더, 및 팽창성 혼화제를 포함하는 조성을 가지고 있다. 청구범위를 포함한 본 명세서 전체에서는 편의상 순환골재로 이루어진 굵은 골재는 "순환 굵은 골재"라고 기재한다. The recycled aggregate concrete composition according to the present invention contains recycled aggregate as an optimal amount of recycled aggregate that can maximize the application range ratio based on the design reference strength of 24 MPa. Specifically, water, natural fine aggregate, and magnetite fine aggregate , natural coarse aggregate, coarse aggregate composed of recycled aggregate, a binder, and an expandable admixture. Throughout this specification including the claims, for convenience, coarse aggregate made of recycled aggregate is referred to as “recycled coarse aggregate”.

본 발명의 순환골재 콘크리트 조성물에는 순환 굵은 골재와 천연 굵은 골재가 함께 사용되는데, 순환 굵은 골재와 천연 굵은 골재의 혼합비율(단위용적당 질량비)은 3:7 내지 5:5로 하는 것이 바람직하다. 구체적으로 본 발명의 순환골재 콘크리트 조성물에서 순환 굵은 골재는 266 내지 465kg/㎥으로 포함되며, 천연 굵은 골재는 386 내지 586kg/㎥으로 포함된다. Recycled coarse aggregate and natural coarse aggregate are used together in the recycled aggregate concrete composition of the present invention, and it is preferable that the mixing ratio (mass ratio per unit volume) of the recycled coarse aggregate to the natural coarse aggregate is 3:7 to 5:5. Specifically, in the recycled aggregate concrete composition of the present invention, the recycled coarse aggregate is included in an amount of 266 to 465 kg/m3, and the natural coarse aggregate is included in an amount of 386 to 586 kg/m3.

특히, 본 발명의 순환골재 콘크리트 조성물에서는 목표로 하는 적용 범위 비율 및 콘크리트 설계기준강도에 따라 순환 굵은 골재의 함유량("순환 굵은 골재량")과 천연 굵은 골재의 함유량("천연 굵은 골재량")이 달라질 수 있다. 앞서 살펴본 것처럼 국토교통부의 <재활용 건축자재의 활용기준> 고시에서는 재활용 건축자재 사용량의 용적비율에 따라 기준 완화 적용 범위를 정하고 있는데, 본 발명의 순환골재 콘크리트 조성물에서는 이러한 재활용 건축자재 사용량의 용적비율 즉, 적용 범위 비율에 맞추어서 순환 굵은 골재량이 달라지는 것이다. In particular, in the recycled aggregate concrete composition of the present invention, the content of recycled coarse aggregate (“recycled coarse aggregate”) and the content of natural coarse aggregate (“natural coarse aggregate”) vary depending on the target application range ratio and the concrete design reference strength. can As discussed above, the Ministry of Land, Infrastructure and Transport's <Utilization Standards for Recycled Building Materials> notice sets the standard relaxation application range according to the volume ratio of the usage of recycled building materials. In the recycled aggregate concrete composition of the present invention, the volume ratio of the usage of recycled building materials , the amount of recycled coarse aggregate varies according to the ratio of the coverage area.

구체적으로 설계기준강도가 24MPa이고 목표로 하는 적용 범위 비율이 5%일 경우에는, 본 발명에 따른 순환골재 콘크리트 조성물에서의 순환 굵은 골재량은 266 내지 286kg/㎥이고, 천연 굵은 골재량은 566 내지 586kg/㎥이 된다. 설계기준강도가 24MPa이고 목표로 하는 적용 범위 비율이 10%일 경우에는 본 발명의 순환골재 콘크리트 조성물에서 순환 굵은 골재량은 353 내지 373kg/㎥이고 천연 굵은 골재량은 476 내지 496kg/㎥이 된다. 또한 설계기준강도가 24MPa이고 목표로 하는 적용 범위 비율이 15%일 경우에는 본 발명의 순환골재 콘크리트 조성물에서의 순환 굵은 골재량은 445 내지 465kg/㎥이고, 천연 굵은 골재량은 386 내지 406kg/㎥이 된다. Specifically, when the design reference strength is 24 MPa and the target application range ratio is 5%, the recycled coarse aggregate amount in the recycled aggregate concrete composition according to the present invention is 266 to 286 kg/m3, and the natural coarse aggregate amount is 566 to 586 kg/ becomes m3. When the design standard strength is 24 MPa and the target coverage ratio is 10%, the recycled coarse aggregate amount in the recycled aggregate concrete composition of the present invention is 353 to 373 kg/m3 and the natural coarse aggregate amount is 476 to 496 kg/m3. In addition, when the design reference strength is 24 MPa and the target coverage ratio is 15%, the recycled coarse aggregate amount in the recycled aggregate concrete composition of the present invention is 445 to 465 kg/m3, and the natural coarse aggregate amount is 386 to 406 kg/m3. .

본 발명의 순환골재 콘크리트 조성물에 사용되는 순환 굵은 골재는 최대 치수 20mm이고 2.50 내지 2.55의 범위 내의 밀도를 가지며 2.47 내지 2.83의 흡수율을 가지는 것이 바람직하다. The recycled coarse aggregate used in the recycled aggregate concrete composition of the present invention preferably has a maximum dimension of 20 mm, has a density within the range of 2.50 to 2.55, and has a water absorption rate of 2.47 to 2.83.

본 발명의 순환골재 콘크리트 조성물에서, 바인더는 분체로서 340 내지 360kg/㎥으로 포함되는데, 바인더로는 시멘트만을 사용할 수도 있지만 필요에 따라서는 고로슬래그 미분말과 플라이애시를 모두 또는 선택적으로 시멘트와 함께 바인더로서 사용할 수도 있다. In the recycled aggregate concrete composition of the present invention, the binder is included as a powder in an amount of 340 to 360 kg/m 3 , and only cement may be used as the binder, but if necessary, both fine blast furnace slag powder and fly ash or optionally cement as a binder can also be used

본 발명에 따른 순환골재 콘크리트 조성물에서, 팽창성 혼화제는 순환골재의 사용으로 인하여 야기되는 콘크리트의 길이변화 및 건조수축을 완화시키기 위하여 사용되는 것이다. 순환골재 콘크리트의 경우, 길이변화와 건조수축으로 인하여 균열 발생이 증가될 수 있고 이로 인하여 내구성에 문제가 발생할 수 있다. 이러한 문제점을 해결하기 위하여, 본 발명에 따른 순환골재 콘크리트 조성물에는 팽창성 혼화제가 2.35 내지 2.55kg/㎥으로 포함되는데, 특히 팽창성 혼화제는 바인더(분체) 100중량부에 대하여 0.5 내지 1.5중량부로 함유될 수 있다. 본 발명에 따른 순환골재 콘크리트 조성물에는 팽창성 혼화제가 상기한 함유량으로 포함되어 사용되므로, 콘크리트의 길이변화 및 건조수축을 완화 내지 저감시키게 됨은 물론이고, 유동성이 크게 개선되고 압축강도가 향상되어 사용성 및 성능이 증진되는 효과가 발휘된다. In the recycled aggregate concrete composition according to the present invention, the expandable admixture is used to alleviate the length change and drying shrinkage of concrete caused by the use of the recycled aggregate. In the case of recycled aggregate concrete, cracking may increase due to length change and drying shrinkage, which may cause problems in durability. In order to solve this problem, the recycled aggregate concrete composition according to the present invention contains the expandable admixture in an amount of 2.35 to 2.55 kg/m3, in particular, the expandable admixture may be contained in an amount of 0.5 to 1.5 parts by weight based on 100 parts by weight of the binder (powder). have. In the recycled aggregate concrete composition according to the present invention, since the expandable admixture is included in the above content, it is possible to relieve or reduce the change in length and drying shrinkage of concrete, as well as greatly improve the fluidity and improve the compressive strength to improve usability and performance. This enhancing effect is exerted.

본 발명의 순환골재 콘크리트 조성물에는 AE제가 더 포함될 수 있는데, AE제는 0.10 내지 0.15kg/㎥으로 포함될 수 있다. 본 발명의 순환골재 콘크리트 조성물에서, 물은 150 내지 170kg/㎥으로 포함되며, 천연 잔골재가 655.3 내지 842.5kg/㎥로 포함된다. 특히, 본 발명의 순환골재 콘크리트 조성물에는, 천연 잔골재에 더하여 자철광 잔골재가 더 함유된다. 자철광 잔골재는 자철광을 입자크기 5mm 이하로 분쇄 가공하여 생산한 것으로서, 본 발명에서는 자철광 잔골재가 93.6 내지 280.8kg/㎥으로 함유된다. 자철광 잔골재의 비중은 약 3.81이고, 자철광 잔골재의 구체적인 성분은 표 1과 같다.The recycled aggregate concrete composition of the present invention may further include an AE agent, and the AE agent may be included in an amount of 0.10 to 0.15 kg/m 3 . In the recycled aggregate concrete composition of the present invention, water is contained in an amount of 150 to 170 kg/m3, and natural fine aggregate is contained in an amount of 655.3 to 842.5 kg/m3. In particular, the recycled aggregate concrete composition of the present invention further contains fine magnetite aggregate in addition to the natural fine aggregate. Magnetite fine aggregate is produced by grinding and processing magnetite to a particle size of 5 mm or less. In the present invention, the fine magnetite aggregate is contained in an amount of 93.6 to 280.8 kg/m 3 The specific gravity of the magnetite fine aggregate is about 3.81, and the specific components of the magnetite fine aggregate are shown in Table 1.

Figure 112021093253582-pat00001
Figure 112021093253582-pat00001

상기한 본 발명에 따른 순환골재 콘크리트 조성물의 배합구성을 정리하면 아래의 표 2와 같다. Table 2 below summarizes the composition of the recycled aggregate concrete composition according to the present invention.

Figure 112021093253582-pat00002
Figure 112021093253582-pat00002

본 발명에 따른 순환골재 콘크리트 조성물의 성능을 확인하기 위하여, 아래와 같은 내용으로 실시예 및 비교예를 준비하여 굳지 않은 콘크리트 상태의 슬럼프와 공기량을 각각 측정하였으며, 실시예1-1, 실시예1-2, 실시예1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1에 대한 각각의 공시체를 준비하여 압축강도를 각각 측정하였다. 아래의 실시예1-1, 실시예1-2, 실시예1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1는 공통 조성으로서 재령 28일 기준 설계기준강도 24MPa를 가지도록 하였으며, 물은 160kg/㎥ 함유되었고, 팽창성 혼화제는 2.45kg/㎥로 함유되었으며, 공기연행제(AE제)가 0.123kg/㎥으로 함유되었다. 실시예1~3 및 비교예1에서 분체로서 바인더의 총량은 350kg/㎥이었는데, 바인더에서 시멘트는 262.5kg/㎥, 고로 슬래그 미분말 52.5kg/㎥ 그리고 플라이애시는 35.0kg/㎥로 각각 함유되었다. 또한 실시예1-1, 실시예1-2, 실시예1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1은 모두 잔골재를 936.1kg/㎥로 함유하고 있으나, 비교예1은 자철광 잔골재를 전혀 함유하지 않고 오로지 천연 잔골재만을 함유하고 있으며, 실시예1-1, 실시예1-2, 실시예 1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2 및 실시예3-3은 각각 아래의 표 3에 제시된 것처럼 천연 잔골재와 함께 자철광 잔골재도 함께 함유하고 있다. 자철광 잔골재는 자철광을 입자크기 5mm 이하로 분쇄 가공하여 생산한 것이다.In order to confirm the performance of the recycled aggregate concrete composition according to the present invention, Examples and Comparative Examples were prepared with the following contents, and the slump and air amount of the unconsolidated concrete were measured, respectively, Example 1-1, Example 1- 2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Example 3-3 and Comparative Example 1, respectively of each specimen was prepared and the compressive strength was measured. Example 1-1, Example 1-2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Example 3-3 and Comparative Example 1 had a design standard strength of 24 MPa based on the age of 28 days as a common composition, and contained 160 kg/m3 of water, and contained 2.45 kg/m of an intumescent admixture, and an air entraining agent (AE). ) was contained at 0.123 kg/m3. In Examples 1 to 3 and Comparative Example 1, the total amount of binder as powder was 350 kg/m3, and cement in the binder was 262.5 kg/m, fine blast furnace slag powder 52.5 kg/m, and fly ash was contained at 35.0 kg/m, respectively. In addition, Example 1-1, Example 1-2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Implementation Examples 3-3 and Comparative Example 1 both contained fine aggregates at 936.1 kg/m3, but Comparative Example 1 contained no magnetite fine aggregates at all, only natural fine aggregates, and Examples 1-1 and 1- 2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2 and Example 3-3 are shown in Table 3 below, respectively. As suggested, it contains fine aggregates of magnetite along with fine natural aggregates. Magnetite fine aggregate is produced by grinding and processing magnetite to a particle size of 5 mm or less.

(비교예1) (Comparative Example 1)

상기한 공통 조성에 더하여 천연 굵은 골재 864.1kg/㎥를 포함하되 순환 굵은 골재는 전혀 사용하지 않으며, 더 나아가 자철광 잔골재는 포함하지 않고 천연 잔골재만 936.1kg/㎥으로 포함하도록 제조된 콘크리트 조성물. In addition to the above common composition, a concrete composition that contains 864.1 kg/m of natural coarse aggregate, but does not use any recycled coarse aggregate, and further contains only 936.1 kg/m of fine natural aggregate without magnetite fine aggregate.

(실시예1-1) (Example 1-1)

<순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 15% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 30% 이상>을 기준으로 하여 국토교통부 고시의 <적용 범위 비율 5%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 842.5kg/㎥, 자철광 잔골재 93.6kg/㎥, 천연 굵은 골재 576.4kg/㎥ 및 순환 굵은 골재 276.7kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. <The first volume ratio of recycled coarse aggregate (the ratio of recycled coarse aggregate to the total amount of aggregate used as a volume ratio) 15% or more> and <Second volume ratio of recycled coarse aggregate (as the volume ratio, the amount of recycled coarse aggregate in the total amount of coarse aggregate used as a volume ratio) It corresponds to the <applicable range ratio of 5%> announced by the Ministry of Land, Infrastructure and Transport based on the above 30%>, and in addition to the above common composition, natural fine aggregate 842.5kg/m3, magnetite fine aggregate 93.6kg/m3, natural coarse aggregate A recycled aggregate concrete composition according to the present invention comprising 576.4 kg/m3 and 276.7 kg/m3 of recycled coarse aggregate.

(실시예1-2) (Example 1-2)

위의 실시예1-1과 마찬가지로 <순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 15% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 30% 이상>을 기준으로 하여 국토교통부 고시의 <적용 범위 비율 5%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 748.9kg/㎥, 자철광 잔골재 187.2kg/㎥, 천연 굵은 골재 576.4kg/㎥ 및 순환 굵은 골재 276.7kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. As in Example 1-1 above, <The first volume ratio of the recycled coarse aggregate (the ratio of the recycled coarse aggregate to the total amount of aggregate used as the volume ratio) 15% or more> and <The second volume ratio of the recycled coarse aggregate (used as the volume ratio) Based on the ratio of recycled coarse aggregates in the total amount of coarse aggregates) 30% or more>, it corresponds to the <applicable range ratio 5%> of the Ministry of Land, Infrastructure and Transport notice. In addition to the above common composition, natural fine aggregate 748.9kg/㎥, magnetite A recycled aggregate concrete composition according to the present invention comprising fine aggregate 187.2 kg/m 3 , natural coarse aggregate 576.4 kg/m 3 and recycled coarse aggregate 276.7 kg/m 3 .

(실시예1-3) (Example 1-3)

위의 실시예1-1과 마찬가지로 <순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 15% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 30% 이상>을 기준으로 하여 국토교통부 고시의 <적용 범위 비율 5%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 655.3kg/㎥, 자철광 잔골재 280.8kg/㎥, 천연 굵은 골재 576.4kg/㎥및 순환 굵은 골재 276.7kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. As in Example 1-1 above, <The first volume ratio of the recycled coarse aggregate (the ratio of the recycled coarse aggregate to the total amount of aggregate used as the volume ratio) 15% or more> and <The second volume ratio of the recycled coarse aggregate (used as the volume ratio) Based on the ratio of recycled coarse aggregates in the total amount of coarse aggregates) 30% or more, it corresponds to the <applicable range ratio 5%> announced by the Ministry of Land, Infrastructure and Transport. In addition to the above common composition, natural fine aggregate 655.3kg/㎥, magnetite A recycled aggregate concrete composition according to the present invention comprising a fine aggregate of 280.8 kg/m3, a natural coarse aggregate of 576.4 kg/m3, and a recirculating coarse aggregate of 276.7 kg/m3.

(실시예2-1) (Example 2-1)

<순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 20% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 40% 이상>을 기준으로 하여 하여 국토교통부 고시의 <적용 범위 비율 10%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 842.5kg/㎥, 자철광 잔골재 93.6kg/㎥, 천연 굵은 골재 486.2kg/㎥ 및 순환 굵은 골재 363.5kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. <The first volume ratio of recycled coarse aggregate (the ratio of recycled coarse aggregate to the total amount of aggregate used as a volume ratio) 20% or more> and <Second volume ratio of recycled coarse aggregate (as the volume ratio, the amount of recycled coarse aggregate from the total amount of coarse aggregate used as a volume ratio) Percentage of 40% or more> as a standard, it corresponds to the <applicable range ratio of 10%> announced by the Ministry of Land, Infrastructure and Transport. A recycled aggregate concrete composition according to the present invention, comprising 486.2 kg/m3 of aggregate and 363.5 kg/m3 of recirculating coarse aggregate.

(실시예2-2) (Example 2-2)

위 실시예2-1과 마찬가지로 <순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 20% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 40% 이상>을 기준으로 하여 하여 국토교통부 고시의 <적용 범위 비율 10%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 748.9kg/㎥, 자철광 잔골재 187.2kg/㎥, 천연 굵은 골재 486.2kg/㎥ 및 순환 굵은 골재 363.5kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. As in Example 2-1 above, <The first volume ratio of the recycled coarse aggregate (the ratio of the recycled coarse aggregate in the total amount of aggregate used as the volume ratio) to 20% or more> and <The second volume ratio of the recycled coarse aggregate (used as the volume ratio coarse aggregate) It corresponds to the <applicable range ratio 10%> announced by the Ministry of Land, Infrastructure and Transport based on the ratio of circulating coarse aggregate to the total amount of aggregate) 40% or more>, and natural fine aggregate 748.9kg/㎥, magnetite A recycled aggregate concrete composition according to the present invention comprising fine aggregate 187.2 kg/m 3 , natural coarse aggregate 486.2 kg/m 3 and recycled coarse aggregate 363.5 kg/m 3 .

(실시예2-3) (Example 2-3)

위 실시예2-1과 마찬가지로 <순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 20% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 40% 이상>을 기준으로 하여 하여 국토교통부 고시의 <적용 범위 비율 10%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 655.3kg/㎥, 자철광 잔골재 280.8kg/㎥, 천연 굵은 골재 486.2kg/㎥ 및 순환 굵은 골재 363.5kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. As in Example 2-1 above, <The first volume ratio of the recycled coarse aggregate (the ratio of the recycled coarse aggregate in the total amount of aggregate used as the volume ratio) to 20% or more> and <The second volume ratio of the recycled coarse aggregate (used as the volume ratio coarse aggregate) Based on the ratio of circulating coarse aggregate in the total amount of aggregate) 40% or more>, it corresponds to the <applicable range ratio 10%> announced by the Ministry of Land, Infrastructure and Transport. In addition to the above common composition, natural fine aggregate 655.3kg/㎥, magnetite A recycled aggregate concrete composition according to the present invention comprising a fine aggregate of 280.8 kg/m3, a natural coarse aggregate of 486.2 kg/m3 and a recirculating coarse aggregate of 363.5 kg/m3.

(실시예3-1)(Example 3-1)

<순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 25% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 50% 이상>을 기준으로 하여 국토교통부 고시의 <적용 범위 비율 15%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 842.5kg/㎥, 자철광 잔골재 93.6kg/㎥, 천연 굵은 골재 396.3kg/㎥ 및 순환 굵은 골재 450.0kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. <The first volume ratio of recycled coarse aggregate (the ratio of recycled coarse aggregate to the total amount of aggregate used as a volume ratio) 25% or more> and <Second volume ratio of recycled coarse aggregate (as the volume ratio, the amount of recycled coarse aggregate in the total amount of coarse aggregate used as a volume ratio) ratio) 50% or more> as a standard, and falls under the <applicable range ratio of 15%> announced by the Ministry of Land, Infrastructure and Transport. A recycled aggregate concrete composition according to the present invention comprising 396.3 kg/m3 and 450.0 kg/m3 of recycled coarse aggregate.

(실시예3-2) (Example 3-2)

<순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 25% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 50% 이상>을 기준으로 하여 국토교통부 고시의 <적용 범위 비율 15%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 748.9kg/㎥, 자철광 잔골재 187.2kg/㎥, 천연 굵은 골재 396.3kg/㎥ 및 순환 굵은 골재 450.0kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. <The first volume ratio of recycled coarse aggregate (the ratio of recycled coarse aggregate to the total amount of aggregate used as a volume ratio) 25% or more> and <Second volume ratio of recycled coarse aggregate (as the volume ratio, the amount of recycled coarse aggregate in the total amount of coarse aggregate used as a volume ratio) ratio) 50% or more> as the standard, and falls under the <applicable range ratio 15%> announced by the Ministry of Land, Infrastructure and Transport. A recycled aggregate concrete composition according to the present invention comprising 396.3 kg/m3 and 450.0 kg/m3 of recycled coarse aggregate.

(실시예3-3) (Example 3-3)

<순환 굵은 골재의 제1부피비(부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 25% 이상> 및 <순환 굵은 골재의 제2부피비(부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율) 50% 이상>을 기준으로 하여 국토교통부 고시의 <적용 범위 비율 15%>에 해당하는 것으로서, 상기한 공통 조성에 더하여 천연 잔골재 655.3kg/㎥, 자철광 잔골재 280.8kg/㎥, 천연 굵은 골재 396.3kg/㎥ 및 순환 굵은 골재 450.0kg/㎥를 포함하는 본 발명에 따른 순환골재 콘크리트 조성물. <The first volume ratio of recycled coarse aggregate (the ratio of recycled coarse aggregate to the total amount of aggregate used as a volume ratio) 25% or more> and <Second volume ratio of recycled coarse aggregate (as the volume ratio, the amount of recycled coarse aggregate in the total amount of coarse aggregate used as a volume ratio) ratio) 50% or more> as a standard, and falls under the <applicable range ratio of 15%> announced by the Ministry of Land, Infrastructure and Transport. A recycled aggregate concrete composition according to the present invention comprising 396.3 kg/m3 and 450.0 kg/m3 of recycled coarse aggregate.

위 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1 각각의 조성범위는 표 3에 정리되어 있다. The composition ranges of Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Example 3-3 and Comparative Example 1 are summarized in Table 3 have.

Figure 112021093253582-pat00003
Figure 112021093253582-pat00003

위 표 3에서 <순환 굵은 골재의 제1부피비>는 부피비로서 사용되는 골재의 총량에서 순환 굵은 골재가 차지하는 비율을 의미하고, <순환 굵은 골재의 제2부피비>는 부피비로서 사용 굵은 골재의 총량에서 순환 굵은 골재가 차지하는 비율을 의미한다.In Table 3 above, <1st volume ratio of recycled coarse aggregate> means the ratio of recycled coarse aggregate to the total amount of aggregate used as a volume ratio, and <2nd volume ratio of recycled coarse aggregate> is a volume ratio from the total amount of used coarse aggregate It refers to the proportion of circulating coarse aggregates.

(시험방법)(Test Methods)

위 실시예1-1, 실시예1-2, 실시예1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1에 대해 공통적으로 KSC 기준에 따라 굳지 않은 콘크리트 상태의 슬럼프와 공기량을 측정하였으며, KSC 기준에 따라 공시체를 제작하여 재령3일, 재령7일, 재령 28일 및 재령 91일 강도를 측정하였다. Example 1-1, Example 1-2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Implementation For Example 3-3 and Comparative Example 1, the slump and air volume in the unconsolidated concrete state were measured according to the KSC standard in common, and the specimen was manufactured according to the KSC standard and aged 3 days, 7 days, 28 days, and 91 days. Work strength was measured.

위 실시예1-1, 실시예1-2, 실시예1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1에 대한 슬럼프 및 공기량 측정결과는 표 4에 정리되어 있으며, 압축강도 시험결과는 표 5에 정리되어 있다. Example 1-1, Example 1-2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Implementation The slump and air amount measurement results for Example 3-3 and Comparative Example 1 are summarized in Table 4, and the compressive strength test results are summarized in Table 5.

Figure 112021093253582-pat00004
Figure 112021093253582-pat00004

위 표 4에서 "기준*"은 국가건설기준표준시방서 KSC 14 20 10 일반콘크리트 기준에 대한 수치이다. "Standard*" in Table 4 above is the numerical value for KSC 14 20 10 general concrete standards in the National Construction Standards Specification.

Figure 112021093253582-pat00005
Figure 112021093253582-pat00005

위 실시예1-1, 실시예1-2, 실시예1-3, 실시예2-1, 실시예2-2, 실시예2-3, 실시예3-1, 실시예3-2, 실시예3-3 및 비교예1에서 확인되는 바와 같이, 건축관련 법규에서 규정하고 있는 적용 범위 비율에 맞추어서 순환 굵은 골재량을 조절한 조성을 가지며 자철광 잔골재를 함유하고 있는 본 발명에 따른 순환골재 콘크리트 조성물은, 천연 골재만을 사용한 경우와 슬럼프 및 공기량(작업성 관련 물성), 그리고 압축강도(콘크리트 성능)에서 동등하거나 오히려 우수한 성능을 발휘하고 있다. 즉, 본 발명에 따르면 재활용 건축자재 사용량의 용적비율 별로 최적의 순환 굵은 골재량을 가지는 순환골재 콘크리트 조성물을 만들 수 있는 것이며, 그에 따라 건축물 시공에서의 경제성을 크게 향상시킬 수 있게 된다. Example 1-1, Example 1-2, Example 1-3, Example 2-1, Example 2-2, Example 2-3, Example 3-1, Example 3-2, Implementation As can be seen in Example 3-3 and Comparative Example 1, the recycled aggregate concrete composition according to the present invention has a composition in which the amount of recycled coarse aggregate is adjusted according to the application range ratio stipulated in the building-related laws, and contains magnetite fine aggregate, When only natural aggregates are used, the performance is equivalent to or superior to that of slump, air volume (workability-related physical properties), and compressive strength (concrete performance). That is, according to the present invention, it is possible to make a recycled aggregate concrete composition having an optimal amount of recycled coarse aggregate for each volume ratio of the amount of recycled building material used, and accordingly, it is possible to significantly improve economic efficiency in building construction.

특히, 본 발명의 순환골재 콘크리트 조성물을 이용하게 되면, 순환골재의 재활용이 더욱 활발하게 되는 바, 부족한 천연자원인 천연골재를 사용한 보통의 콘크리트의 사용량을 감소시켜서, 천연자원 채취를 위한 환경파괴 및 환경부하를 저감시킬 수 있게 되는 효과가 발휘된다. In particular, when the recycled aggregate concrete composition of the present invention is used, recycling of recycled aggregate becomes more active, and by reducing the amount of ordinary concrete using natural aggregate, which is a scarce natural resource, environmental destruction and The effect of reducing the environmental load is exhibited.

또한 본 발명의 순환골재 콘크리트 조성물은 잔골재로서 "자철광 잔골재"를 더 포함하고 있는 바, 이를 통해서 유동성(흐름성) 개선, 슬럼프 및 공기량(작업성 관련 물성), 그리고 압축강도(콘크리트 성능)에서 매우 만족스러운 우수한 성능을 발휘하고 있다. In addition, the recycled aggregate concrete composition of the present invention further contains "fine iron ore" as a fine aggregate, thereby improving fluidity (flowability), slump and air volume (workability-related physical properties), and compressive strength (concrete performance). It exhibits satisfactory excellent performance.

그리고 본 발명의 순환골재 콘크리트 조성물은 한국산업규격 기준을 만족시키는 우수한 품질을 가지는 바, 건축물뿐만 아니라, 각종 토목구조물에도 사용할 수 있어서, 그 활용도가 극대화되는 장점이 있으며, 따라서 순환골재의 활용 역시 증대하게 되고, 레미콘 업계에서 생산되는 순환골재 콘크리트 조성물에 대하여 우수한 품질을 확보하고 보장할 수 있게 된다. And the recycled aggregate concrete composition of the present invention has an excellent quality that satisfies the Korean Industrial Standards standards, and can be used not only for buildings but also for various civil structures, so its utility is maximized, and thus the utilization of recycled aggregate is also increased. And it is possible to secure and guarantee excellent quality for the recycled aggregate concrete composition produced in the ready-mixed concrete industry.

더 나아가 본 발명에서는, 목표로 하는 적용 범위 비율 및 콘크리트 설계기준강도에 맞추어서 최적화된 순환 굵은 골재량을 가지는 순환골재 콘크리트 조성물이 제공되는 바, 목적에 따라 적용 범위 비율을 최대로 할 수 있게 되고, 그에 따라 건축물 시공의 경제성을 크게 향상시킬 수 있게 되는 장점이 발휘된다. Further, in the present invention, there is provided a recycled aggregate concrete composition having a recycled coarse aggregate amount optimized according to a target application range ratio and concrete design reference strength, so that the application range ratio can be maximized according to the purpose, Accordingly, the advantage of being able to greatly improve the economic feasibility of building construction is exhibited.

Claims (8)

물, 천연 잔골재, 자철광 잔골재, 천연 굵은 골재, 순환 굵은 골재, 바인더 및 팽창성 혼화제를 포함하는 조성을 가지며;
순환 굵은 골재량은 266 내지 465kg/㎥이고;
천연 굵은 골재량은 386 내지 586kg/㎥이며;
순환 굵은 골재와 천연 굵은 골재의 혼합비는 3:7 내지 5:5이고;
자철광 잔골재의 함유량은 93.6 내지 280.8kg/㎥이며;
설계기준강도는 24MPa인 것을 특징으로 하는 순환골재 콘크리트 조성물.
having a composition comprising water, natural fine aggregate, magnetite fine aggregate, natural coarse aggregate, recycled coarse aggregate, a binder and an expandable admixture;
The recycled coarse aggregate amount is 266 to 465 kg/m3;
The amount of natural coarse aggregate is 386 to 586 kg/m3;
The mixing ratio of recycled coarse aggregate and natural coarse aggregate is 3:7 to 5:5;
The content of magnetite fine aggregate is 93.6 to 280.8 kg/m3;
Recycled aggregate concrete composition, characterized in that the design reference strength is 24 MPa.
제1항에 있어서,
순환 굵은 골재량과 천연 굵은 골재량은 목표로 하는 적용 범위 비율에 따라 달라지는데;
목표로 하는 적용 범위 비율이 5%일 경우에는 순환 굵은 골재량은 266 내지 286kg/㎥이고 천연 굵은 골재량은 566 내지 586kg/㎥이며;
목표로 하는 적용 범위 비율이 10%일 경우에는 순환 굵은 골재량은 353 내지 373kg/㎥이고 천연 굵은 골재량은 476 내지 496kg/㎥이고;
목표로 하는 적용 범위 비율이 15%일 경우에는 순환 굵은 골재량은 445 내지 465kg/㎥이고 천연 굵은 골재량은 386 내지 406kg/㎥인 것을 특징으로 하는 순환골재 콘크리트 조성물.
According to claim 1,
The amount of recycled coarse aggregate and natural coarse aggregate will depend on the target coverage ratio;
When the target coverage ratio is 5%, the recycled coarse aggregate amount is 266 to 286 kg/m3, and the natural coarse aggregate amount is 566 to 586 kg/m3;
When the target coverage ratio is 10%, the recycled coarse aggregate amount is 353 to 373 kg/m3 and the natural coarse aggregate amount is 476 to 496 kg/m3;
Recycled aggregate concrete composition, characterized in that when the target coverage ratio is 15%, the recycled coarse aggregate amount is 445 to 465 kg/m3 and the natural coarse aggregate amount is 386 to 406 kg/m3.
제1항 또는 제2항에 있어서,
바인더는 340 내지 360kg/㎥으로 포함되는 것을 특징으로 하는 순환골재 콘크리트 조성물.
3. The method of claim 1 or 2,
Recycled aggregate concrete composition, characterized in that the binder is included in 340 to 360kg / ㎥.
제3항에 있어서,
바인더는 시멘트이거나 또는, 고로슬래그 미분말과 플라이애시가 모두 또는 선택적으로 시멘트에 혼합된 것임을 특징으로 하는 순환골재 콘크리트 조성물.
4. The method of claim 3,
The binder is cement or a recycled aggregate concrete composition, characterized in that fine blast furnace slag powder and fly ash are all or selectively mixed with cement.
제1항 또는 제2항에 있어서,
팽창성 혼화제는 2.35 내지 3.55kg/㎥으로 함유되는 것을 특징으로 하는 순환골재 콘크리트 조성물.
3. The method of claim 1 or 2,
The recycled aggregate concrete composition, characterized in that the expandable admixture is contained in an amount of 2.35 to 3.55 kg/m3.
제1항 또는 제2항에 있어서,
AE제가 0.10 내지 0.15kg/㎥으로 더 함유되는 것을 특징으로 하는 순환골재 콘크리트 조성물.
3. The method of claim 1 or 2,
Recycled aggregate concrete composition, characterized in that the AE agent is further contained in an amount of 0.10 to 0.15 kg/m3.
제1항 또는 제2항에 있어서,
물의 함유량은 150 내지 170kg/㎥인 것을 특징으로 하는 순환골재 콘크리트 조성물.
3. The method of claim 1 or 2,
Recycled aggregate concrete composition, characterized in that the content of water is 150 to 170 kg / ㎥.
제1항 또는 제2항에 있어서,
천연 잔골재의 함유량은 655.3 내지 842.5kg/㎥인 것을 특징으로 하는 순환골재 콘크리트 조성물.
3. The method of claim 1 or 2,
The recycled aggregate concrete composition, characterized in that the content of natural fine aggregate is 655.3 to 842.5 kg / ㎥.
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KR102488082B1 (en) * 2022-07-08 2023-01-12 원용한 Concrete Composition having Recycled Coarse Aggregates with Lime Stone Powder and Magnetite Powder
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KR102631755B1 (en) 2022-08-25 2024-02-01 한국건설기술연구원 27MPa Concrete Composition having Recycled Fine Aggregates with CSA-system Expansive Admixture

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