KR101138243B1 - Composition of ready-mixed concrete using industrial wastes - Google Patents
Composition of ready-mixed concrete using industrial wastes Download PDFInfo
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- KR101138243B1 KR101138243B1 KR20110136532A KR20110136532A KR101138243B1 KR 101138243 B1 KR101138243 B1 KR 101138243B1 KR 20110136532 A KR20110136532 A KR 20110136532A KR 20110136532 A KR20110136532 A KR 20110136532A KR 101138243 B1 KR101138243 B1 KR 101138243B1
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- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
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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
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
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- 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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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 산업폐기물을 이용한 레미콘 조성물에 관한 것으로, 구체적으로는 본 발명의 출원인에 의해 선출원하여 등록받은 대한민국 등록특허공보 제10-0993797호의 "산업폐기물을 이용한 레미콘 조성물"을 개량하여, 상기 산업폐기물을 이용한 레미콘 조성물 중 '폐주물사'를 대체하여 '폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재'를 사용하고, 상기 레미콘 조성물 중 '폐골재'를 대체하여 '폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재'를 사용하되, 상기 폐콘크리트를 파쇄한 잔골재 및 골재의 입도범위 뿐만 아니라 밀도, 단위용적질량, 흡수율, 실적률을 최적화시킨, 산업폐기물을 이용한 레미콘 조성물에 관한 것이다.
The present invention relates to a ready-mixed concrete composition using industrial waste, specifically By improving the "lemicon composition using industrial waste" of the Republic of Korea Patent Publication No. 10-0993797 registered and filed by the applicant of the present invention, replacing the 'waste foundry sand' of the ready-mixed concrete composition using the industrial waste 'particle size of waste concrete The fine aggregate crushed into the range 0.08 ~ 10mm ', and the' Aggregate crushed the waste concrete in the particle size range 2.5 ~ 25mm by replacing 'waste aggregate' in the ready-mixed concrete composition, and the fine aggregate crushed the waste concrete and Optimized density, unit volume mass, water absorption and performance rate as well as the particle size range of aggregates, It relates to a ready-mixed concrete composition using industrial waste.
일반적으로, 레미콘(ready-mixed concrete)은 시멘트, 모래, 자갈 및 물이 혼합되어 이루어지는 복합 재료로써, 비교적 저렴한 가격에 비하여 강도가 우수하고 거푸집의 설치에 따라 다양한 형상으로 성형할 수 있어 최근까지 건축 구조체를 형성하는 재료로서 가장 보편적으로 사용되고 있는 재료이다.
In general, ready-mixed concrete is a composite material made of a mixture of cement, sand, gravel, and water. Compared to a relatively low price, the ready-mixed concrete has excellent strength and can be molded into various shapes according to the installation of formwork. It is the material most commonly used as a material for forming a structure.
상기 레미콘은 시멘트, 모래, 자갈 및 물을 기본 재료로 하여 이루어짐이 일반적이나, 최근에는 그 품질을 개선하거나 여러 특성을 부여하기 위하여 플라이애쉬와 같은 포졸란 물질을 혼화재로 첨가하여 사용하는 경우가 증가하고 있다.
The ready-mixed concrete is generally composed of cement, sand, gravel, and water, but recently, in order to improve its quality or to impart various properties, pozzolan materials such as fly ash are added and used as admixtures. have.
상기 플라이애쉬는 화력 발전소 등의 연소 보일러에서 미분탄을 연료로 사용하여 1400℃ 정도의 고온연소 과정에서 배출되는 폐가스 중에 포함된 석탄재를 집진기에 의해 회수한 입자를 말하는 것으로, 플라이애쉬를 포틀랜드 시멘트와 혼합하여 제조된 레미콘은 일반 레미콘에 비하여 시멘트 사용량의 감소, 유동성의 개선, 블리딩의 감소, 수화열 감소, 알카리 골재 반응의 억제, 수밀성의 향상과 같은 장점이 나타나는 특성이 있을 뿐만 아니라 다른 포졸란 재료에 비해 상대적으로 단가가 낮고 산업폐기물의 재활용이라는 장점을 가지고 있어 널리 사용되고 있으며, 관련 선행기술로써 대한민국 공개특허공보 제10-1998-028032호, 제10-2001-0037292호, 제10-2004-0098175호, 제10-2004-0089762호, 제10-2009-0037622호 및 대한민국 등록특허공보 제10-0220901호, 제10-0196702호, 제10-0300008호 등이 있다.
The fly ash refers to the particles recovered by the dust collector of coal ash contained in the waste gas discharged during the high-temperature combustion process of about 1400 ℃ by using pulverized coal as fuel in a combustion boiler such as a thermal power plant, mixing fly ash with Portland cement. Compared with other pozzolan materials, the ready-mixed concrete concrete has advantages such as reduced cement usage, improved fluidity, reduced bleeding, reduced heat of hydration, suppressed alkali aggregate reaction, and improved water tightness compared to other ready-mixed concrete. It has a low unit price and has the advantage of recycling industrial waste, and is widely used, and as related related arts, Korean Patent Publication Nos. 10-1998-028032, 10-2001-0037292, and 10-2004-0098175, 10-2004-0089762, 10-2009-0037622, and Republic of Korea Patent Publication Nos. 10-0220901, 10-0196702, 10-0300008, etc .;
특히 상기와 같은 특허들의 경우에는 폐골재, 폐주물사 등과 같은 산업폐기물만을 사용하여 시멘트와 혼합하여 레미콘 조성물을 제조할 경우 폐골재의 내구성과 강도가 신생골재에 비해 그 성능이 떨어짐에 따라 압축강도가 낮아지는 문제점들이 있었으며, 이를 보완하기 위해 플라이애쉬를 혼합하고 있지만, 플라이애쉬를 사용한 콘크리트의 압축강도 및 강도 발현율을 살펴보면, 시멘트의 특성 및 배합비에 따라 다소간의 영향은 있으나 일반적으로 플라이애쉬를 사용하지 않은 레미콘에 비하여 장기 재령에서는 그 강도가 현저하게 증가하나, 초기 재령에서의 '초기 강도'는 떨어지는 현상이 발생한다.
Particularly, in the case of the above patents, when the ready-mixed concrete composition is mixed with cement using only industrial waste such as waste aggregate and waste foundry sand, the durability and strength of the waste aggregate are lower than the new aggregate, and thus the compressive strength is low. There are some problems, and the fly ash is mixed to compensate for this. However, when looking at the compressive strength and the strength expression rate of the concrete using the fly ash, there are some effects depending on the properties and the mixing ratio of the cement, but the fly ash is generally not used. Compared to ready-mixed concrete, its strength increases significantly in long-term age, but the 'initial strength' in early age falls.
이는 플라이애쉬 자체의 반응성이 낮으므로 초기 재령에서는 강도가 낮게 발현되나 장기 재령에서는 상기 플라이애쉬가 레미콘 중의 물에 용해되어 있는 수산화칼슘과 서서히 화합하여 불용성의 안정한 규산칼슘수화물 등을 생성(포졸란 반응)하기 때문이다.
This is because the fly ash itself is low in reactivity, the strength is low in early age, but in long-term age, the fly ash is slowly combined with calcium hydroxide dissolved in water in ready-mixed concrete to produce insoluble stable calcium silicate hydrate (Pozolan reaction). Because.
상기와 같은 특성으로 인하여 플라이애쉬가 혼입된 레미콘의 '초기 강도' 확보는 콘크리트 공사 관리시 대단히 중요한 사항이 되고 있으며, 이와 관련된 연구 결과로 뮤끄리히(Mukherjee) 등은 고성능 감수제를 사용하여 물-결합재비를 0.28까지 감소시킴으로써 플라이애쉬가 혼입된 레미콘의 초기강도를 증가시킬 수 있다는 사실을 입증하였다.
Due to the above characteristics, securing the 'initial strength' of ready-mixed concrete mixed with fly ash has become a very important matter in the management of concrete construction, and as a result of this research, Mukherjee et al. It has been demonstrated that by reducing the binder ratio to 0.28, fly ash can increase the initial strength of incorporated concrete.
또한, 고쉬(Gosh)의 실험결과는 실리카흄을 사용하여 플라이애쉬 콘크리트의 초기강도를 증진시킬 수 있으며, 플라이애쉬와 실리카흄을 동시에 사용하는 것이 수산화칼슘이 실리카흄 및 플라이애쉬와 계속하여 반응하도록 하기때문에 장기강도를 더욱 지속적으로 증가시킬 수 있음을 보여주고 있다.
In addition, the results of Gosh's experiments show that silica fume can be used to enhance the initial strength of fly ash concrete, and the use of both fly ash and silica fume causes calcium hydroxide to continuously react with silica fume and fly ash. It is shown that it can increase more continuously.
하지만, 상기와 같은 초기 강도 확보 방법은 고성능 감수제, 실리카흄 등 추가로 고가의 혼화재료가 첨가되므로 콘크리트 타설시 신중한 배합관리가 요구되고, 비용이 많이 소모되어 경제적으로 부담이 증가되는 단점이 있어 실제 국내의 작업현장에서는 거의 사용되고 있지 않은 실정이다.
However, the method of securing the initial strength as described above requires expensive mixing materials such as high performance water reducing agent and silica fume, so that careful mixing and management of concrete is required. It is rarely used in the workplace.
따라서, 플라이애쉬를 첨가하더라도 저렴한 비용으로 초기 강도를 확보할 수 있는 레미콘 조성물에 대한 개발이 절실한 실정이었다.
Therefore, the development of ready-mixed concrete composition that can secure the initial strength at a low cost even if the fly ash is added.
따라서, 본 발명의 출원인은 석재 미분말, 석회석 미분말, 플라이애쉬 및 고로슬래그 미분말로 이루어지는 레미콘용 기능성 분말혼화재에, 폐골재, 신생골재, 잔골재, 폐주물사, 시멘트 및 사용수를 포함하여 구성되어, 플라이애쉬가 혼입된 레미콘의 '초기 강도'를 증가시킬 수 있을 뿐만 아니라 폐골재, 폐주물사 등과 함께 신생골재를 혼합하여 콘크리트의 압축강도를 더욱 향상키면서도 각종 산업폐기물을 재활용함으로써 산업 폐기물에 의한 환경오염을 방지할 수 있는 환경친환적인 레미콘 조성물을 개발하고, 이를 선출원하여 등록(대한민국 등록특허공보 제10-0993797호)받은 바 있다.
Therefore, the applicant of the present invention comprises a waste aggregate, new aggregate, fine aggregate, waste foundry sand, cement and water used in the functional powder admixture for ready-mixed concrete consisting of stone fine powder, limestone fine powder, fly ash and blast furnace slag fine powder, fly ash Not only can increase the initial strength of mixed concrete mixed with new aggregates, but also improve the compressive strength of concrete by mixing new aggregates with waste aggregates and waste casting sands, while preventing various kinds of industrial wastes. Development of environmentally friendly ready-mixed concrete composition, and has already been registered and registered (Korean Patent Publication No. 10-0993797).
하지만, 최근 환경부에서는 상기 폐주물사(주물 제조에 사용된 모래)에 대한 사용을 규제하였으며, 이에 따라 본 발명의 출원인은 폐주물사를 사용하지 않고도 상기와 같은 효과를 구현할 수 있는 레미콘 조성물을 개발하고자 하였다.
However, the Ministry of Environment recently regulated the use of the waste foundry sand (sand used in the manufacture of casting), and thus, the applicant of the present invention intends to develop a ready-mixed concrete composition capable of realizing the same effect without using the waste foundry sand.
따라서, 본 발명은 상기와 같은 문제점을 해결하기 위해 본 발명의 출원인에 의해 선출원하여 등록받은 대한민국 등록특허공보 제10-0993797호의 "산업폐기물을 이용한 레미콘 조성물"을 개량한 것으로, 상기 산업폐기물을 이용한 레미콘 조성물 중 '폐주물사'를 대체하여 '폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재'를 사용하고, 상기 레미콘 조성물 중 '폐골재'를 대체하여 '폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재'를 사용하되, 상기 폐콘크리트를 파쇄한 잔골재 및 골재의 입도범위 뿐만 아니라 밀도, 단위용적질량, 흡수율, 실적률을 최적화시킴으로써, 폐주물사를 사용하지 않고, 플라이애쉬가 혼입된 레미콘의 '초기 강도'를 증가시킬 수 있을 뿐만 아니라 콘크리트의 압축강도를 더욱 향상키면서도 각종 산업폐기물을 재활용함으로써 산업 폐기물에 의한 환경오염을 방지할 수 있도록 하는 환경친화적인 레미콘 조성물을 제공함을 과제로 한다.
Therefore, the present invention is to improve the "remicon composition using industrial waste" of the Republic of Korea Patent Publication No. 10-0993797 registered and filed by the applicant of the present invention in order to solve the above problems, using the industrial waste In the ready-mixed composition, 'waste foundry sand' was used to replace 'waste aggregate with crushed concrete in the particle size range of 0.08 to 10mm', and 'waste aggregate' in the ready-mixed concrete composition was used to crush `` waste concrete in the particle size range of 2.5 to 25mm ''. 'Initial strength of the ready-mixed ready-mixed concrete ready-mixed concrete using fly ash by optimizing density, unit volume mass, absorption rate and performance rate, as well as particle size range of fine aggregates and aggregates crushed waste concrete. Not only increase the amount of concrete, but also improve the compressive strength of concrete, The ready-mixed concrete to provide an eco-friendly composition in order to prevent environmental pollution due to waste problems.
본 발명은 레미콘용 기능성 분말혼화재 10 ~ 15 중량%, 폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재 25 ~ 47 중량%, 신생골재 2 ~ 5 중량%, 잔골재 3 ~ 5 중량%, 입도범위 0.08 ~ 10mm로 파쇄한 잔골재 30 ~ 35 중량%, 시멘트 5 ~ 10 중량% 및 사용수 3 ~ 5 중량%로 이루어지되, 상기 레미콘용 기능성 분말혼화재는, 석재 미분말 25 ~ 35중량%, 석회석 미분말 30 ~ 35중량%, 플라이애쉬 15 ~ 20중량% 및 고로슬래그 미분말 15 ~ 20중량%로 이루어지는 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물을 과제의 해결 수단으로 한다.
The present invention is 10 ~ 15% by weight of functional powder admixture for ready-mixed concrete, 25 ~ 47% by weight of aggregated waste concrete in the particle size range 2.5 ~ 25mm, 2 ~ 5% by weight of new aggregate, 3 ~ 5% by weight of fine aggregate, 0.08 in particle size range 30 to 35% by weight of fine aggregates, 5 to 10% by weight of cement and 3 to 5% by weight of the used aggregates, the functional powder admixture for ready-mixed concrete, 25 to 35% by weight of stone fine powder, fine limestone 30 ~ The ready-mixing composition using industrial waste which consists of 35 weight%, 15-20 weight% of fly ashes, and 15-20 weight% of blast furnace slag powders is made into the solution of the subject.
한편, 폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재는, 밀도 2.2 ~ 2.8g/㎤, 단위용적질량 1,300 ~ 1,600 kg/㎤, 흡수율 0.5 ~ 5.0%, 실적률 50.0 ~ 59.0%인 것이 바람직하다.
On the other hand, the aggregate which crushed the waste concrete in the particle size range of 2.5 to 25mm is preferably 2.2 to 2.8 g / cm 3, unit volume mass 1,300 to 1,600 kg / cm 3, absorption rate 0.5 to 5.0%, and performance rate 50.0 to 59.0%. .
아울러, 상기 신생골재는, 입도범위 10 ~ 27mm, 밀도 2.5 ~ 3.0g/㎤, 단위용적질량 1,500 ~ 1,800 kg/㎤, 흡수율 0.3 ~ 2.9%, 실적률 52.0 ~ 66.0%인 것이 바람직하다.
In addition, the new aggregate is preferably in the particle size range 10 ~ 27mm, density 2.5 ~ 3.0g / cm 3, unit volume mass 1,500 ~ 1,800 kg / cm 3, water absorption 0.3 ~ 2.9%, the performance rate 52.0 ~ 66.0%.
또한, 입도범위 0.08 ~ 10mm로 파쇄한 잔골재는, 밀도 2.2 ~ 2.8g/㎤, 단위용적질량 1,200 ~ 1,700 kg/㎤, 흡수율 3.0 ~ 10.0%, 실적률 50.0 ~ 57.0%인 것이 바람직하다.
In addition, the fine aggregates crushed into a particle size range of 0.08 to 10 mm are preferably 2.2 to 2.8 g / cm 3, unit volume mass of 1,200 to 1,700 kg / cm 3, absorption ratio of 3.0 to 10.0%, and performance rate of 50.0 to 57.0%.
또한, 상기 석재 미분말과 석회석 미분말은, 100～150℃의 온도에서 건조시키면서, 1차 분쇄시 2000～3000㎠/g의 분말도, 2차 분쇄시 4500～6000㎠/g의 분말도로 가공하여 이루어지는 것이 바람직하다.
Further, the stone fine powder and the limestone fine powder are dried at a temperature of 100 to 150 ° C., and are processed to a powder of 2000 to 3000 cm 2 / g at the time of primary grinding and to a powder of 4500 to 6000 cm 2 / g at the time of secondary grinding. It is preferable.
또한, 상기 플라이애쉬는, 4000～5000㎠/g의 분말도를 가지는 것이 바람직하다.
Moreover, it is preferable that the said fly ash has a powder degree of 4000-5000 cm <2> / g.
또한, 상기 고로슬래그 미분말은, 4500～6000㎠/g의 분말도를 가지는 것이 바람직하다.
Moreover, it is preferable that the said blast furnace slag fine powder has a powder degree of 4500-6000 cm <2> / g.
본 발명에 의하면, 본 발명의 출원인에 의해 선출원하여 등록받은 대한민국 등록특허공보 제10-0993797호의 "산업폐기물을 이용한 레미콘 조성물"을 개량한 것으로, 상기 산업폐기물을 이용한 레미콘 조성물 중 '폐주물사'를 대체하여 '폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재'를 사용하고, 상기 레미콘 조성물 중 '폐골재'를 대체하여 '폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재'를 사용하되, 상기 폐콘크리트를 파쇄한 잔골재 및 골재의 입도범위 뿐만 아니라 밀도, 단위용적질량, 흡수율, 실적률을 최적화시킴으로써, 폐주물사를 사용하지 않고, 플라이애쉬가 혼입된 레미콘의 '초기 강도'를 증가시킬 수 있을 뿐만 아니라 콘크리트의 압축강도를 더욱 향상키면서도 각종 산업폐기물을 재활용함으로써 산업 폐기물에 의한 환경오염을 방지할 수 있도록 하는 장점이 있다.
According to the present invention, to improve the "remixture composition using industrial waste" of the Republic of Korea Patent Publication No. 10-0993797 registered and filed by the applicant of the present invention, replacing the 'waste foundry sand' of the ready-mixed concrete composition using the industrial waste By using 'grain aggregate crushed waste concrete in the particle size range 0.08 ~ 10mm', and using 'aggregate crushed waste concrete in the particle size range 2.5 ~ 25mm' by replacing the 'waste aggregate' in the ready-mixed concrete composition, the lung By optimizing not only the particle size range of fine aggregates and aggregates crushed concrete, but also the density, unit volume mass, absorption rate, and performance rate, it is possible to increase the 'initial strength' of the ready-mixed concrete mixed with fly ash without using waste casting sand. By improving the compressive strength of concrete and recycling various industrial wastes, it is possible to prevent environmental pollution by industrial wastes. There are advantages to help.
이하, 본 발명의 바람직한 실시예를 상세히 설명하며, 일반적인 레미콘 조성물의 제조분야의 종사자들이 용이하게 알 수 있는 구성 및 작용에 대한 언급은 간략히 하거나 생략하였다.
Hereinafter, preferred embodiments of the present invention will be described in detail, and reference to configurations and actions easily understood by those skilled in the art of preparing a ready-mixed concrete composition will be briefly or omitted.
본 발명은 본 발명의 출원인에 의해 선출원하여 등록받은 대한민국 등록특허공보 제10-0993797호의 "산업폐기물을 이용한 레미콘 조성물"을 개량한 것으로, 레미콘용 기능성 분말혼화재 10 ~ 15 중량%, 폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재 25 ~ 47 중량%, 신생골재 2 ~ 5 중량%, 잔골재 3 ~ 5 중량%, 입도범위 0.08 ~ 10mm로 파쇄한 잔골재 30 ~ 35 중량%, 시멘트 5 ~ 10 중량% 및 사용수 3 ~ 5 중량%로 이루어지는 것을 특징으로 한다.
The present invention is an improvement of the "remicon composition using industrial waste" of the Republic of Korea Patent Publication No. 10-0993797 registered and filed by the applicant of the present invention, 10 to 15% by weight of the functional powder admixture for ready-mixed concrete, waste concrete 25 to 47% by weight of aggregates crushed into 2.5 to 25mm, 2 to 5% by weight of new aggregates, 3 to 5% by weight of fine aggregates, 30 to 35% by weight of fine aggregates shredded to a particle size range of 0.08 to 10mm, 5 to 10% by weight of cement And it is characterized by consisting of 3 to 5% by weight of use.
본 발명에서 사용되는 레미콘용 기능성 분말혼화재는, 혼화재에 포함되는 석재 미분말, 석회석 미분말 및 고로슬래그가 레미콘 사이의 공극을 메워 레미콘 조직을 더욱 세밀하게 형성시킴으로써, 레미콘의 초기 강도를 증가시킬 수 있는 '기능'을 하는 '레미콘용 혼화재'를 의미하는 것으로, 석재 미분말 25 ~ 35중량%, 석회석 미분말30 ~ 35중량%, 플라이애쉬 15 ~ 20중량% 및 고로슬래그 미분말 15 ~ 20중량%로 이루어진다.
Functional powder admixture for ready-mixed concrete used in the present invention, the fine stone powder, limestone fine powder and blast furnace slag included in the admixture can fill the pores between the ready-mixed concrete structure to further refine the ready-mixed concrete structure, ' It means 'mixture for ready-mixed concrete' which has a function, consisting of 25 to 35% by weight stone fine powder, 30 to 35% by weight fine limestone, 15 to 20% by weight fly ash and 15 to 20% by weight blast furnace slag.
본 발명에서 사용되는 석재 미분말은 석재 가공시 발생하는 미분말로써, 다량의 수분을 함유하고 있고 그 자체로는 사용이 불가능하기 때문에 100～150℃로 건조시키면서 1차 분쇄시, 2000～3000㎠/g의 분말도를 갖도록 가공하고, 다시 2차분쇄시, 4500～6000㎠/g의 분말도를 가질 수 있도록 가공하는 것이 바람직하다.The fine stone powder used in the present invention is a fine powder generated during stone processing, and contains a large amount of water and cannot be used by itself. Therefore, the first fine grinding while drying at 100 to 150 ° C., 2000 to 3000 cm 2 / g It is preferable to process so that it may have a powder degree of, and to process it so that it may have a powder degree of 4500-6000 cm <2> / g at the time of secondary grinding.
상기 석재 미분말의 사용량은 25～35중량%가 바람직하며, 25중량% 미만일 경우, 레미콘 사이의 공극을 충분히 메우지 못하여 초기 강도의 증가가 미비하게 되며, 35중량%를 초과할 경우, 플라이애쉬의 사용량이 감소하여 플라이애쉬에 의한 시멘트 사용량의 감소, 유동성의 개선, 블리딩의 감소, 수화열 감소, 알카리 골재 반응의 억제, 수밀성의 향상과 같은 장점을 구현하지 못하는 문제점이 있다.
The amount of the fine stone powder is preferably 25 to 35% by weight, and less than 25% by weight, the gap between the ready-mixed concrete is not sufficiently filled, so that an initial increase in strength is insufficient. There is a problem that can not implement the advantages such as decrease in the amount of cement used by fly ash, improving the fluidity, reducing the bleeding, reducing the heat of hydration, suppress the alkali aggregate reaction, improve the water-tightness due to the decrease in the amount used.
본 발명에서 사용되는 석회석 미분말은 석회석 제조과정에 발생되는 미분말로써, 석회석 분말이 약간의 수분을 함유하고 있기 때문에 100～150℃로 건조시키면서 1차 분쇄시, 2000～3000㎠/g의 분말도를 갖도록 가공하고, 다시 2차분쇄시, 4500～6000㎠/g의 분말도를 가질 수 있도록 가공하는 것이 바람직하다.The limestone fine powder used in the present invention is a fine powder generated in the limestone manufacturing process, and because the limestone powder contains some moisture, the powder degree of 2000 to 3000 cm2 / g is obtained during the first grinding while drying at 100 to 150 ° C. It is preferable to process so that it may have a powder degree of 4500-6000 cm <2> / g at the time of secondary grinding.
상기 석회석 미분말의 사용량은 30～35중량%가 바람직하며, 30중량% 미만일 경우, 레미콘 사이의 공극을 충분히 메우지 못하여 초기 강도의 증가가 미비하게 되며, 35중량%를 초과할 경우, 플라이애쉬의 사용량이 감소하여 플라이애쉬에 의한 시멘트 사용량의 감소, 유동성의 개선, 블리딩의 감소, 수화열 감소, 알카리 골재 반응의 억제, 수밀성의 향상과 같은 장점을 구현하지 못하는 문제점이 있다.
The amount of the limestone fine powder is preferably 30 to 35% by weight, less than 30% by weight, the gap between the ready-mixed concrete is not sufficiently filled, the initial strength increase is insufficient, and when the amount exceeds 35% by weight, There is a problem that can not implement the advantages such as decrease in the amount of cement used by fly ash, improving the fluidity, reducing the bleeding, reducing the heat of hydration, suppress the alkali aggregate reaction, improve the water-tightness due to the decrease in the amount used.
본 발명에서 사용되는 플라이애쉬는 화력 발전소 등의 연소 보일러에서 미분탄을 연료로 사용하여 1400℃ 정도의 고온연소 과정에서 배출되는 폐가스 중에 포함된 석탄재를 집진기에 의해 회수한다. 따라서, 정재 분쇄처리하여 4000～5000㎠/g의 분말도를 갖도록 가공한 것을 사용하는 것이 바람직하다.The fly ash used in the present invention recovers coal ash contained in the waste gas discharged during the high temperature combustion process of about 1400 ° C. using fine coal as a fuel in a combustion boiler such as a thermal power plant. Therefore, it is preferable to use the thing processed so that it may have a powder degree of 4000-5000 cm <2> / g by a refinement grinding process.
상기 플라이애쉬의 사용량은 15～20중량%가 바람직하며, 15중량% 미만일 경우, 플라이애쉬에 의한 시멘트 사용량의 감소, 유동성의 개선, 블리딩의 감소, 수화열 감소, 알카리 골재 반응의 억제, 수밀성의 향상과 같은 장점을 구현하지 못하게 되며, 20중량%를 초과할 경우, 석재 미분말, 석회석 미분말 및 고로슬래그의 사용량이 감소하여 레미콘 사이의 공극을 충분히 메우지 못하고, 이로 인해 초기 강도의 증가가 미비하게 되는 문제점이 있다.
The amount of the fly ash is preferably 15 to 20% by weight, when less than 15% by weight, the amount of cement used by the fly ash, the improvement of fluidity, the reduction of bleeding, the reduction of heat of hydration, the suppression of alkali aggregate reaction, the improvement of water tightness If it exceeds 20% by weight, the amount of stone fine powder, limestone fine powder and blast furnace slag is reduced, so that the gap between the ready-mixed concrete is not sufficiently filled, which results in insufficient initial strength increase. There is a problem.
본 발명에서 사용되는 고로슬래그는 용광로에서 철광석으로부터 선철을 만들 때 생기는 철 이외의 불순물이다. 따라서, 고로슬래그 미분말을 분쇄하여 4500～6000㎠/g의 분말도를 가지도록 가공한 것을 사용하는 것이 바람직하다.Blast furnace slag used in the present invention is an impurity other than iron produced when pig iron is made from iron ore in a blast furnace. Therefore, it is preferable to use what grind | pulverized the blast furnace slag powder and processed so that it may have a powder degree of 4500-6000 cm <2> / g.
상기 고로슬래그의 사용량은 30～35중량%가 바람직하며, 30중량% 미만일 경우, 레미콘 사이의 공극을 충분히 메우지 못하여 초기 강도의 증가가 미비하게 되며, 35중량%를 초과할 경우, 플라이애쉬의 사용량이 감소하여 플라이애쉬에 의한 시멘트 사용량의 감소, 유동성의 개선, 블리딩의 감소, 수화열 감소, 알카리 골재 반응의 억제, 수밀성의 향상과 같은 장점을 구현하지 못하는 문제점이 있다.
The use amount of the blast furnace slag is preferably 30 to 35% by weight, when less than 30% by weight, the gap between the ready-mixed concrete is insufficient to increase the initial strength is insufficient, when the excess of 35% by weight of the fly ash There is a problem that can not implement the advantages such as decrease in the amount of cement used by fly ash, improving the fluidity, reducing the bleeding, reducing the heat of hydration, suppress the alkali aggregate reaction, improve the water-tightness due to the decrease in the amount used.
한편, 상기와 같이 구성되는 레미콘용 기능성 분말혼화재는 레미콘 조성물 중, 10 ~ 15 중량%가 사용되는데, 상기 레미콘용 기능성 분말혼화재의 사용량이 10 중량% 미만일 경우, 레미콘의 초기 강도를 증가시킬 수 있는 효과가 미비해지는 문제점이 있으며, 15 중량%를 초과할 경우, 기타 다른 조성물의 함량이 감소함에 따라 장기 재령에서의 콘크리트의 압축강도가 저하되는 문제점이 있다.
On the other hand, the functional powder admixture for ready-mixed concrete composition as described above, 10 to 15% by weight of the ready-mixed concrete composition, when the amount of the functional powder admixture for the ready-mixed concrete is less than 10% by weight, can increase the initial strength of the ready-mixed concrete There is a problem in that the effect is insignificant, and if it exceeds 15% by weight, there is a problem in that the compressive strength of the concrete at a long age as the content of the other composition is reduced.
본 발명에서 사용되는 "폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재"는, 조립율로 인한 재료분리와 블리딩과 함께 유동성 및 장기강도개선을 하기 위해 혼합되는 것으로, 레미콘 조성물 중, 25 ~ 47 중량%가 사용되는데, 상기 사용량이 25 중량% 미만일 경우, 조립율이 높아져 블리딩수가 많아지고 유동성이 저하하는 문제점이 있으며, 47 중량%를 초과할 경우, 조립율이 낮아져 단위수량이 증대하고 응결시간이 지연 및 장기강도가 저하하는 문제점이 있다."Agglomerated aggregate of waste concrete with a particle size range of 2.5 to 25mm" used in the present invention, which is mixed to improve fluidity and long-term strength with material separation and bleeding due to the assembly rate, in the ready-mixed composition, 25 to 47 weight % Is used, when the amount is less than 25% by weight, there is a problem in that the assembly rate is increased, the number of bleeding is increased and the fluidity is lowered. When it exceeds 47% by weight, the assembly rate is lowered to increase the unit quantity and delay the setting time and There is a problem that the long-term strength is lowered.
이때, 상기 폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재는, 밀도 2.2 ~ 2.8g/㎤, 단위용적질량 1,300 ~ 1,600 kg/㎤, 흡수율 0.5 ~ 5.0%, 실적률 50.0 ~ 59.0%인 것을 사용하는 것이 바람직하며, 상기 조건을 벗어날 경우, 작업성이 떨어지고 단위수량이 중대하여 초기 및 장기강도가 현저하게 떨어져 시멘트량이 증대하여 초기균열이 발생하는 문제점이 있다.
At this time, the aggregates crushed the waste concrete in the particle size range of 2.5 ~ 25mm, the density 2.2 ~ 2.8g / ㎠, unit volume mass 1,300 ~ 1,600 kg / ㎠, absorption rate 0.5 ~ 5.0%, performance rate 50.0 ~ 59.0% It is preferable to, if the condition is out of the above, there is a problem that the workability is poor and the amount of the unit is significant, the initial and long-term strength is significantly dropped and the amount of cement increases to cause an initial crack.
본 발명에서 사용되는 신생골재는 콘크리트의 압축강도를 향상시키기 위해 혼합되는 것으로, 입도범위 10 ~ 27mm, 밀도2.5 ~ 3.0g/㎤, 단위용적질량 1,500~1,800 kg/㎤, 흡수율 0.3~2.9%, 실적률 52.0~66.0%인 것을 2 ~ 5 중량% 첨가하여 사용하는 것이 바람직하며, 상기 조건 미만에서는 상기 폐콘크리트를 파쇄한 골재와의 혼합이 불균일해짐에 따라 레미콘 조성물로써 사용할 수 없으며, 상기 조건을 초과할 경우, 양생 후 표면에 균열이 발생하는 문제점이 있다.
The new aggregate used in the present invention is mixed to improve the compressive strength of the concrete, the particle size range 10 ~ 27mm, density 2.5 ~ 3.0g / cm 3, unit volume mass 1,500 ~ 1,800 kg / cm 3, absorption 0.3 ~ 2.9%, It is preferable to add 2 to 5% by weight of those having an effective rate of 52.0 to 66.0%, and the mixing of the waste concrete with the crushed aggregate becomes less than the above condition, so that it cannot be used as a ready mixed concrete composition. If it exceeds, there is a problem that cracks on the surface after curing.
본 발명에서 사용되는 "폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재"는, 조립율로 인한 재료분리와 블리딩과 함께 유동성 및 장기강도 개선을 하기 위해 혼합되는 것으로, 레미콘 조성물 중, 30 ~ 35 중량%가 사용되는데, 상기 사용량이 30 중량% 미만일 경우, 콘크리트의 재료분리와 블리딩이 많아져 초결과 종결시간이 길어지는 문제점이 있으며, 35 중량%를 초과할 경우, 콘크리트의 미세한 분말량이 증가하여 응결의 초결시간과 종결시간이 짧아지고 건조수축률이 증대하는 문제점이 있다."Rubber aggregate crushed waste concrete in the particle size range of 0.08 ~ 10mm" used in the present invention is mixed to improve fluidity and long-term strength with material separation and bleeding due to the assembly rate, 30 to 35 weight in the ready-mixed composition % Is used, when the amount is less than 30% by weight, the material separation and bleeding of the concrete is increased, the initial result and the end time is long, and when it exceeds 35% by weight, the amount of fine powder of concrete increases to congeal There is a problem in that the initial time and the termination time of the short and the drying shrinkage increases.
이때, 상기 폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 골재는, 밀도 2.2 ~ 2.8g/㎤, 단위용적질량 1,200 ~ 1,700 kg/㎤, 흡수율 3.0 ~ 10.0%, 실적률 50.0 ~ 57.0%인 것을 사용하는 것이 바람직하며, 상기 조건을 벗어날 경우, 콘크리트의 재료분리와 블리딩이 많아져 초결과 종결시간이 길어지는 경우 및 미세한 분말량이 증가하여 응결의 초결시간과 종결시간이 짧아지고 건조수축률이 증대하는 문제점이 있다.
At this time, the aggregates crushed the waste concrete in the particle size range of 0.08 ~ 10mm, the density 2.2 ~ 2.8g / cm 3, unit volume mass 1,200 ~ 1,700 kg / cm 3, absorption rate 3.0 ~ 10.0%, the performance rate 50.0 ~ 57.0% If the above conditions are exceeded, the material separation and bleeding of concrete increase, resulting in a long initial and final time and a fine powder amount, which increases the initial and final time of condensation and increases the dry shrinkage rate. There is this.
한편, 상기 조성물 외에 본 발명의 "산업폐기물을 이용한 레미콘 조성물"에 포함되는 잔골재, 시멘트, 사용수는 레미콘 조성물에 사용되는 일반적인 재료로써 그 설명을 생략한다.
On the other hand, in addition to the above composition, fine aggregates, cement, and water used in the "lemicon composition using industrial waste" of the present invention are omitted as a general material used in the ready-mixing composition.
이하, 본 발명을 아래의 실시예를 통해 상세히 설명하지만, 실시예에 의해 반드시 한정하는 것은 아니다.
Hereinafter, the present invention will be described in detail with reference to the following examples, but are not necessarily limited to the examples.
1. 레미콘 조성물의 제조
1. Preparation of ready-mixed concrete composition
(실시예 1)(Example 1)
석재 가공시 발생되는 미분말 재료를 150℃에서 건조시키면서 1차 분쇄시 3000㎠/g의 분말도, 2차 분쇄시 6000㎠/g의 분말도로 가공한 석재 미분말 25중량%, 석회석 가공 생산시 발생된 분말을 150℃에서 건조시키면서 1차 분쇄시 3000㎠/g의 분말도, 2차 분쇄시 6000㎠/g의 분말도로 가공한 석회석 미분말 35중량%, 5000㎠/g의 분말도를 가지는 플라이애쉬 20중량%, 6000㎠/g의 분말도를 가지는 고로슬래그 미분말 20중량%을 혼합하여 레미콘용 기능성 분말혼화재를 제조한 후,25% by weight of the fine powder produced during the first grinding, the powder of 3000cm / g during the first grinding, the powder of 6000cm / g during the second grinding, drying the fine powder produced during the stone processing at 150 ℃ Fly ash 20 having a powder density of 3000 cm 2 / g in the first milling and a powder of limestone fine powder of 5000 cm 2 / g in the second milling with a powder of 3000 cm 2 / g After mixing 20% by weight of blast furnace slag fine powder having a powder degree of weight%, 6000 cm 2 / g to prepare a functional powder admixture for ready-mixed concrete,
상기 제조된 레미콘용 기능성 분말혼화재 10중량%, 폐콘크리트를 입도범위 2.5mm로 파쇄한 골재 47 중량%, 신생골재 2중량%, 잔골재 3중량%, 폐콘크리트를 입도범위 0.08mm로 파쇄한 잔골재 30중량%, 시멘트 5중량% 및 사용수 3중량%를 혼합하여, 레미콘 조성물을 제조하되, 폐콘크리트를 입도범위 2.5mm로 파쇄한 골재는, 밀도 2.2g/㎤, 단위용적질량 1,300kg/㎤, 흡수율 0.5%, 실적률 50.0%인 것을 사용하였고, 폐콘크리트를 입도범위 0.08mm로 파쇄한 잔골재는, 밀도 2.2g/㎤, 단위용적질량 1,200kg/㎤, 흡수율 3.0 %, 실적률 50.0%인 것을 사용하였다.
10% by weight of the functional powder admixture prepared for ready-mixed concrete, 47% by weight of aggregated waste concrete in a particle size range of 2.5mm, 2% by weight of new aggregate, 3% by weight of aggregate aggregate, and 30% of aggregates in which the waste concrete was broken into a particle size range of 0.08mm To prepare a ready-mixed concrete composition by mixing the weight%, 5% by weight of cement and 3% by weight of used water, the aggregates crushed waste concrete in the particle size range of 2.5mm, density 2.2g / cm 3, unit volume mass 1,300kg / cm 3, 0.5% water absorption rate and 50.0% performance rate were used, and the fine aggregates crushed waste concrete with a particle size range of 0.08 mm had a density of 2.2 g / cm 3, a unit volume mass of 1,200 kg / cm 3, an absorption rate of 3.0% and a performance rate of 50.0%. Used.
(실시예 2)(Example 2)
석재 가공시 발생되는 미분말 재료를 100℃에서 건조시키면서 1차 분쇄시 2000㎠/g의 분말도, 2차 분쇄시 4500㎠/g의 분말도로 가공한 석재 미분말 35중량%, 석회석 가공 생산시 발생된 분말을 100℃에서 건조시키면서 1차 분쇄시 2000㎠/g의 분말도, 2차 분쇄시 4500㎠/g의 분말도로 가공한 석회석 미분말 30중량%, 4000㎠/g의 분말도를 가지는 플라이애쉬 15중량%, 4500㎠/g의 분말도를 가지는 고로슬래그 미분말 15중량%을 혼합하여 레미콘용 기능성 분말혼화재를 제조한 후,35% by weight of the fine powder produced in the first grinding, the powder of 2000cm / g in the first grinding, and the powder of 4500cm / g in the second grinding, drying the fine powder generated during stone processing at 100 ℃ Fly ash 15 having a powder density of 2000 cm 2 / g during primary grinding and a powder degree of limestone finely processed at 4500 ° C./g during secondary grinding while the powder is dried at 100 ° C. After mixing 15% by weight of blast furnace slag fine powder having a powder degree of weight%, 4500 cm 2 / g to prepare a functional powder admixture for ready-mixed concrete,
상기 제조된 레미콘용 기능성 분말혼화재 15중량%, 폐콘크리트를 입도범위 25mm로 파쇄한 골재 25 중량%, 신생골재 5중량%, 잔골재 5중량%, 폐콘크리트를 입도범위 10mm로 파쇄한 잔골재 35중량%, 시멘트 10중량% 및 사용수 5중량%를 혼합하여, 레미콘 조성물을 제조하되, 폐콘크리트를 입도범위 25mm로 파쇄한 골재는, 밀도 2.8g/㎤, 단위용적질량 1,600 kg/㎤, 흡수율 5.0%, 실적률 59.0%인 것을 사용하였고, 폐콘크리트를 입도범위 10mm로 파쇄한 잔골재는, 밀도 2.8g/㎤, 단위용적질량 1,700 kg/㎤, 흡수율 10.0%, 실적률 57.0%인 것을 사용하였다.
15% by weight of the functional powder admixture prepared for ready-mixed concrete, 25% by weight of aggregated waste concrete in a particle size range of 25 mm, 5% by weight of new aggregate, 5% by weight of fine aggregate, 35% by weight of fine aggregate, shredded concrete in a particle size range of 10 mm , By mixing 10% by weight of cement and 5% by weight of water, to prepare a ready-mixed concrete composition, the aggregate of crushed waste concrete in a particle size range of 25mm, density 2.8g / cm 3, unit volume mass 1,600 kg / cm 3, absorption rate 5.0% The used aggregate having a yield rate of 59.0% was used, and the fine aggregate crushed waste concrete into a particle size range of 10 mm was used with a density of 2.8 g / cm 3, unit volume mass of 1,700 kg / cm 3, water absorption rate of 10.0%, and yield rate of 57.0%.
(비교예 1)(Comparative Example 1)
플라이애쉬 10중량%, 폐골재 45중량%, 잔골재 5중량%, 폐주물사 25중량%, 시멘트 10중량% 및 사용수 5중량%를 혼합하여, 레미콘 조성물을 제조하였다.
10% by weight of fly ash, 45% by weight of waste aggregate, 5% by weight of fine aggregate, 25% by weight of waste foundry sand, 10% by weight of cement and 5% by weight of water were used to prepare a ready-mixed concrete composition.
(비교예 2)(Comparative Example 2)
플라이애쉬 10중량%, 폐골재 42중량%, 잔골재 3중량%, 폐주물사 30 중량%, 시멘트 10중량% 및 사용수 5중량%를 혼합하여, 레미콘 조성물을 제조하였다.
10% by weight of fly ash, 42% by weight of waste aggregate, 3% by weight of fine aggregate, 30% by weight of waste foundry sand, 10% by weight of cement and 5% by weight of water were used to prepare a ready-mixed concrete composition.
상기와 같이, 비교예 1, 2는 통상의 폐골재, 잔골재, 폐주물사, 시멘트에 플라이애쉬를 단순 혼입하여 레미콘 조성물을 제조한 것이며, 실시예 1, 2는 본 발명의 출원인에 의해 선출원하여 등록받은 대한민국 등록특허공보 제10-0993797호의 "산업폐기물을 이용한 레미콘 조성물"을 개량하여, 상기 산업폐기물을 이용한 레미콘 조성물 중 '폐주물사'를 대체하여 폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재를 사용하고, 상기 레미콘 조성물 중 '폐골재'를 대체하여 폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재를 사용하되, 상기 폐콘크리트를 파쇄한 잔골재 및 골재의 입도범위 뿐만 아니라 밀도, 단위용적질량, 흡수율, 실적률을 최적화시킨, 레미콘 조성물을 제조한 것으로서, 상기 각 실시예 및 비교예의 구성성분을 아래 [표 1]에 나타내었다.
As described above, Comparative Examples 1 and 2 were prepared by simply mixing fly ash into ordinary waste aggregate, fine aggregate, waste casting sand, and cement to prepare a ready-mixed concrete composition, and Examples 1 and 2 were previously filed and registered by the applicant of the present invention. By improving the "Remicon composition using industrial waste" of the Republic of Korea Patent Publication No. 10-0993797, using the fine aggregate crushed waste concrete in the particle size range 0.08 ~ 10mm by replacing the 'waste foundry sand' of the ready-mixed concrete composition using the industrial waste In addition, using the aggregates crushed waste concrete in the particle size range 2.5 ~ 25mm to replace the 'waste aggregate' in the ready-mixed concrete composition, as well as the particle size range of the fine aggregates and aggregates crushed the waste concrete, density, unit volume mass, absorption rate, As a ready-mixed concrete composition with optimized performance rate, the components of the above Examples and Comparative Examples are shown in Table 1 below.
레미콘용 기능성
분말 혼화재주1 )
Functionality for ready-mixed concrete
Powder admixture Note 1 )
10
10
15
15
-
-
-
-
파쇄한 골재주2 ) Waste concrete
Crushed Aggregate Note 2 )
파쇄한 잔골재주3 ) Waste concrete
Crushed aggregate 3)
실시예 1의 레미콘용 기능성 분말 혼화재는, 석재 미분말 25중량%, 석회석 미분말 35중량%, 플라이애쉬 20중량% 및 고로슬래그 미분말 20중량%로 이루어짐.
실시예 2의 레미콘용 기능성 분말 혼화재는, 석재 미분말 35중량%, 석회석 미분말 30중량%, 플라이애쉬 15중량% 및 고로슬래그 미분말 20중량%로 이루어짐.
주2)
실시예 1의 폐콘크리트를 파쇄한 골재는, 입도범위 2.5mm, 밀도 2.2g/㎤, 단위용적질량 1,300kg/㎤, 흡수율 0.5%, 실적률 50.0%인 것을 사용함.
실시예 2의 폐콘크리트를 파쇄한 골재는, 입도범위 25mm, 밀도 2.8g/㎤, 단위용적질량 1,600 kg/㎤, 흡수율 5.0%, 실적률 59.0%인 것을 사용함.
주3)
실시예 1의 폐콘크리트를 파쇄한 잔골재는, 입도범위 0.08mm, 밀도 2.2g/㎤, 단위용적질량 1,200kg/㎤, 흡수율 3.0 %, 실적률 50.0%인 것을 사용함.
실시예 2의 폐콘크리트를 파쇄한 잔골재는, 입도범위 10mm, 밀도 2.8g/㎤, 단위용적질량 1,700 kg/㎤, 흡수율 10.0%, 실적률 57.0%인 것을 사용함.Note 1)
The functional powder admixture for ready-mixed concrete of Example 1 consists of 25 weight% of stone fine powder, 35 weight% of limestone fine powder, 20 weight% of fly ash, and 20 weight% of blast furnace slag fine powder.
The functional powder admixture for ready-mixed concrete of Example 2 consists of 35 weight% of stone fine powder, 30 weight% of fine limestone powder, 15 weight% of fly ash, and 20 weight% of blast furnace slag fine powder.
Note 2)
The aggregate which crushed the waste concrete of Example 1 used the thing of particle size range 2.5mm, density 2.2g / cm <3>, unit volume mass 1,300kg / cm <3>, 0.5% water absorption rate, and 50.0% yield rate.
The aggregate which crushed the waste concrete of Example 2 uses the particle size range 25mm, density 2.8g / cm <3>, unit volume mass 1,600kg / cm <3>, the water absorption rate 5.0%, and the performance ratio 59.0%.
Note 3)
The fine aggregate crushed waste concrete of Example 1 uses the particle size range 0.08mm, density 2.2g / cm <3>, unit volume mass 1,200kg / cm <3>, water absorption rate 3.0%, and the performance rate 50.0%.
The fine aggregate crushed the waste concrete of Example 2 uses the particle size range 10mm, density 2.8g / cm <3>, unit volume mass 1,700kg / cm <3>, the water absorption rate 10.0%, and the performance rate 57.0%.
2. 레미콘의 초기 강도 비교
2. Comparison of Initial Strength of Ready Mixed Concrete
상기 실시예 1, 2 및 비교예 1, 2의 초기 강도를 측정하기 위해, 재령 3일(초기), 재령 7일(초기) 및 재령 28일 후, 한국공업규격 KS F 2403, 2405에 규정된 공시체 제작 및 강도측정방법에 의하여 초기 강도를 측정하였으며, 그 결과를 아래의 [표 2]에 나타내었다.
In order to measure the initial strength of Examples 1 and 2 and Comparative Examples 1 and 2, after 3 days (initial age), 7 days (initial age), and 28 days of age, the Korean Industrial Standard KS F 2403, 2405 Initial strength was measured by specimen preparation and strength measurement methods, and the results are shown in the following [Table 2].
측정결과, 상기 표 2에서와 같이, 종래 폐골재, 잔골재, 시멘트에 플라이애쉬를 단순 혼입한 레미콘보다, 본 발명에 따른 '레미콘용 기능성 분말혼화재'와 '신생골재' 와 '폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재' 및 '폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재'를 혼입한 레미콘이 초기강도와 전체적인 압축강도가 매우 우수한 것으로 나타났으며, 그 이유는 상기 레미콘용 기능성 분말혼화재에 포함되는 석재 미분말, 석회석 미분말 및 고로슬래그가 레미콘 사이의 공극을 메워 레미콘 조직을 더욱 세밀하게 형성시킴으로써, 레미콘의 초기 강도를 증가시킬 수 있었으며, 내구성과 강도가 우수한 신생골재가 혼입됨으로써, 전체적인 압축강도가 더욱 향상된 것으로 판단된다.
As a result of the measurement, as shown in Table 2, the particle size range of the 'functional powder admixture for ready-mixed concrete' and 'new aggregate' and 'waste concrete' according to the present invention, rather than the conventional mixed concrete, fly aggregate, fly ash into concrete cement It was shown that the ready mixed concrete mixed with 2.5 ~ 25mm aggregates' and 'the fine aggregate crushed waste concrete with a particle size range of 0.08 ~ 10mm' showed very good initial strength and overall compressive strength. Stone fine powder, limestone fine powder and blast furnace slag included in the admixture filled the gaps between the ready-mixed concretes to form more detailed concrete structure, thereby increasing the initial strength of the ready-mixed concrete. The compressive strength is considered to be further improved.
따라서, 본 발명은 초기 강도의 저하 없이, 시멘트 사용량의 감소, 유동성의 개선, 블리딩의 감소, 수화열 감소, 알카리 골재 반응의 억제, 수밀성의 향상과 같은 장점을 가지는 플라이애쉬를 사용할 수 있을 뿐만 아니라, 특히 신생골재를 혼합하여 레미콘 조성물을 제조함으로써 종래의 폐골재만을 사용한 레미콘 조성물과는 달리 콘크리트의 압축강도를 향상시킬 수 있다.
Therefore, the present invention can not only use fly ash, which has advantages such as reduction of the amount of cement used, improvement of fluidity, reduction of bleeding, reduction of heat of hydration, inhibition of alkali aggregate reaction, and improvement of water tightness, without a decrease in initial strength. In particular, by preparing a ready-mixed concrete composition by mixing the new aggregate, it is possible to improve the compressive strength of concrete unlike the ready-mixed concrete composition using only conventional waste aggregate.
즉, 본 발명은 본 발명의 출원인에 의해 선출원하여 등록받은 대한민국 등록특허공보 제10-0993797호의 "산업폐기물을 이용한 레미콘 조성물"을 개량하여 상기 산업폐기물을 이용한 레미콘 조성물 중 '폐주물사'를 대체하여 '폐콘크리트를 입도범위 0.08 ~ 10mm로 파쇄한 잔골재'를 사용하고, 상기 레미콘 조성물 중 '폐골재'를 대체하여 '폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재'를 사용하되, 상기 폐콘크리트를 파쇄한 잔골재 및 골재의 입도범위 뿐만 아니라 밀도, 단위용적질량, 흡수율, 실적률을 최적화시킴으로써, 폐주물사를 사용하지 않고, 플라이애쉬가 혼입된 레미콘의 '초기 강도'를 증가시킬 수 있을 뿐만 아니라 콘크리트의 압축강도를 더욱 향상키면서도 각종 산업폐기물을 재활용함으로써 산업 폐기물에 의한 환경오염을 방지할 수 있음을 알 수 있다.
That is, the present invention improves the "remixture composition using industrial waste" of the Republic of Korea Patent Publication No. 10-0993797 registered and filed by the applicant of the present invention to replace the 'waste waste sand' of the ready-mixed concrete composition using the industrial waste ' Using fine aggregates crushed waste concrete with a particle size range of 0.08 ~ 10mm, and using 'aggregate crushed waste concrete into a particle size range of 2.5 ~ 25mm' by replacing 'waste aggregate' in the ready-mixed concrete composition, By optimizing not only the particle size range of crushed fine aggregates and aggregates, but also the density, unit volume mass, absorption rate, and performance rate, it is possible to increase the 'initial strength' of ready-mixed concrete mixed with fly ash without using waste casting sand. It is possible to prevent environmental pollution caused by industrial waste by recycling various industrial wastes while further improving compressive strength. Can.
상술한 바와 같이, 본 발명의 일 실시예에 따른 산업폐기물을 이용한 레미콘 조성물의 우수성이 입증되었지만 본 발명은 상기의 구성에 의해서만 반드시 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능하다.As described above, the excellence of the ready-mixed concrete composition using industrial waste according to an embodiment of the present invention has been demonstrated, but the present invention is not necessarily limited only by the above configuration, and various modifications may be made without departing from the technical spirit of the present invention. Branch substitutions, modifications and variations are possible.
Claims (7)
상기 레미콘용 기능성 분말혼화재는,
석재 미분말 25 ~ 35중량%, 석회석 미분말 30 ~ 35중량%, 플라이애쉬 15 ~ 20중량% 및 고로슬래그 미분말 15 ~ 20중량%로 이루어지고,
상기 폐콘크리트를 입도범위 2.5 ~ 25mm로 파쇄한 골재는,
밀도 2.2 ~ 2.8g/㎤, 단위용적질량 1,300 ~ 1,600 kg/㎤, 흡수율 0.5 ~ 5.0%, 실적률 50.0 ~ 59.0%인 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물
10 ~ 15% by weight of functional powder admixture for ready-mixed concrete, 25 ~ 47% by weight of crushed waste concrete in particle size range of 2.5 ~ 25mm, 2 ~ 5% by weight of new aggregate, 3 ~ 5% by weight of fine aggregate, and 0.08 ~ 10mm in particle size range 30 to 35 wt% of crushed fine aggregate, 5 to 10 wt% of cement and 3 to 5 wt% of water used,
The functional powder admixture for ready-mixed concrete,
25 to 35% by weight of stone powder, 30 to 35% by weight of limestone powder, 15 to 20% by weight of fly ash and 15 to 20% by weight of blast furnace slag powder,
Aggregate crushed the waste concrete in the particle size range 2.5 ~ 25mm,
Ready-mixed concrete composition using industrial waste, characterized in that the density 2.2 ~ 2.8g / ㎠, unit volume mass 1,300 ~ 1,600 kg / ㎠, absorption rate 0.5 ~ 5.0%, performance rate 50.0 ~ 59.0%
상기 신생골재는,
입도범위 10 ~ 27mm, 밀도 2.5 ~ 3.0g/㎤, 단위용적질량 1,500 ~ 1,800 kg/㎤, 흡수율 0.3 ~ 2.9%, 실적률 52.0 ~ 66.0%인 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물
The method of claim 1,
The new aggregate,
Particle size range 10 ~ 27mm, density 2.5 ~ 3.0g / ㎠, unit volume mass 1,500 ~ 1,800 kg / ㎠, absorption rate 0.3 ~ 2.9%, performance ratio 52.0 ~ 66.0% ready-mixed concrete composition using industrial wastes
입도범위 0.08 ~ 10mm로 파쇄한 잔골재는,
밀도 2.2 ~ 2.8g/㎤, 단위용적질량 1,200 ~ 1,700 kg/㎤, 흡수율 3.0 ~ 10.0%, 실적률 50.0 ~ 57.0%인 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물
The method of claim 1,
The fine aggregate crushed into the particle size range 0.08 ~ 10mm,
Ready-mixed concrete composition using industrial waste, characterized in that the density 2.2 ~ 2.8g / cm 3, unit volume mass 1,200 ~ 1,700 kg / cm 3, absorption rate 3.0 ~ 10.0%, performance rate 50.0 ~ 57.0%
상기 석재 미분말과 석회석 미분말은,
100～150℃의 온도에서 건조시키면서, 1차 분쇄시 2000～3000㎠/g의 분말도, 2차 분쇄시 4500～6000㎠/g의 분말도로 가공하여 이루어지는 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물
The method of claim 1,
The stone fine powder and limestone fine powder,
Drying at a temperature of 100-150 ° C. while processing the powder of 2000-3000 cm 2 / g during the first grinding process and the powder of 4500-6000 cm 2 / g during the second grinding process, the ready-mixed concrete composition using industrial wastes
상기 플라이애쉬는,
4000～5000㎠/g의 분말도를 가지는 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물
The method of claim 1,
The fly ash,
Ready-mixed concrete composition using industrial waste, characterized in that it has a powder degree of 4000 ~ 5000 ㎠ / g
상기 고로슬래그 미분말은,
4500～6000㎠/g의 분말도를 가지는 것을 특징으로 하는 산업폐기물을 이용한 레미콘 조성물The method of claim 1,
The blast furnace slag fine powder,
Ready-mixed concrete composition using industrial waste, characterized by having a powder degree of 4500 ~ 6000 ㎠ / g
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