KR102210123B1 - Eco-friendly ready-mixed concrete composition and preparation method thereof - Google Patents
Eco-friendly ready-mixed concrete composition and preparation method thereof Download PDFInfo
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Abstract
Description
본 발명은 친환경적인 레미콘 조성물 및 이의 제조방법에 관한 것으로, 구체적으로, 산업 부산물을 재활용할 수 있는 폐석분, 바텀애쉬 및 활성탄으로 구성된 경량골재와 레미콘 회수수를 포함하는 레미콘 조성물에 관한 것이다.The present invention relates to an eco-friendly ready-mixed concrete composition and a method for manufacturing the same, and specifically, to a ready-mixed concrete composition comprising a lightweight aggregate composed of waste-rock powder, bottom ash and activated carbon that can recycle industrial by-products, and ready-mixed concrete recovered water.
최근 지구온난화가 심각한 문제로 대두되면서 녹색성장을 목표로 하여 전세계적으로 이산화탄소(CO2) 발생량을 저감시키기 위해 많은 캠페인 및 에너지자원 개발에 관한 연구를 진행하고 있다. 이에 따른 환경에 대한 인식전환으로 오염에 대한 각종 규제가 강화 및 확대되고 있다.Recently, as global warming has emerged as a serious problem, many campaigns and research on energy resource development are being conducted to reduce the amount of carbon dioxide (CO 2 ) generated worldwide with the aim of green growth. Accordingly, various regulations on pollution have been strengthened and expanded due to the change in awareness of the environment.
최근 건설산업에서는 환경문제에 관한 사안을 중요시하여 새로운 대처방안이 요구되고 있고, 이에 따라 콘크리트 산업에서는 이산화탄소 발생량을 줄이는 환경 문제와 함께 산업부산물의 처리 기술과 재활용 기술에 대한 연구가 지속적으로 보고되고 있다.In recent years, the construction industry places importance on environmental issues and new countermeasures are required. Accordingly, in the concrete industry, studies on the treatment technology and recycling technology of industrial by-products along with environmental problems that reduce the amount of carbon dioxide are continuously reported. .
그러나, 국내에서는 산업부산물의 처리 및 재활용 기술에 대한 연구는 아직 미진하여 대부분이 산업폐기물로 방치되고 있어 환경오염을 발생시킬 뿐만 아니라 처리장소 등의 확보에 있어서도 상당한 문제점이 제기되고 있다. 특히 레미콘 생산 시, 기기 및 자비 등에 고착된 콘크리트는 가수 혼합 등으로 분해가 불가능하여 콘크리트의 제조 및 운반 작업이 종료된 후에는 남아있는 잉여 콘크리트를 세척할 때 많은 양의 콘크리트 세척수가 발생한다.However, in Korea, research on the treatment and recycling technology of industrial by-products is still insufficient, and most of them are neglected as industrial wastes, so not only environmental pollution but also significant problems have been raised in securing treatment sites. In particular, during the production of ready-mixed concrete, it is impossible to disassemble the concrete fixed to equipment and boiling by mixing with water, so after the production and transportation of concrete is completed, a large amount of concrete washing water is generated when washing the remaining excess concrete.
최근에는 레미콘 회수수 재활용 설비를 이용하여 용수자원으로 재활용하고 있으나, 콘크리트 배합 시에 회수수를 사용하게 되는 경우 콘크리트 품질의 불안정성과 그 재처리에 소요되는 비용의 증가의 문제가 있다.Recently, a ready-mixed concrete recovered water recycling facility is used to recycle it as a water resource. However, when the recovered water is used when mixing concrete, there is a problem of instability of concrete quality and an increase in cost required for reprocessing.
또한, 제철 과정에서 발생되는 부산물인 고로슬래그 미분말, 플라이애시 등 산업부산물을 재활용하여 지구온난화 등 환경문제와 자원부족 문제를 동시에 해결하고 있다. 최근까지 산업부산물 중에 활용도가 높은 것은 플라이애쉬였으나, 화력발전의 주 연료인 무연탄의 품질이 조악해지고 생산량 또한 감소하고 있어 플라이애쉬의 품질정성이 떨어지고 있는 추세이다. 이에, 이를 대체할 수 있는 고로슬래그 미분말을 사용하려고 하나 고로슬래그 미분말은 초기강도 저하, 콘크리트의 수축 변형 증가, 콘크리트의 중성화 및 저온으로 인한 응결지연, 초기 블리딩 과다록 인한 균열발생에 대한 문제가 있다.In addition, by recycling industrial by-products such as blast furnace slag powder and fly ash, which are by-products generated in the steelmaking process, environmental problems such as global warming and resource shortage problems are solved at the same time. Until recently, fly ash was highly utilized among industrial by-products, but the quality of anthracite, which is the main fuel for thermal power generation, is poor and production is decreasing, leading to a decline in the quality of fly ash. Therefore, it is attempted to use blast furnace slag powder that can be replaced, but the blast furnace slag powder has problems of lowering the initial strength, increasing the shrinkage deformation of concrete, neutralizing the concrete and delaying congealation due to low temperature, and cracking due to excessive initial bleeding. .
이에, 본원출원인은 기존 레미콘 조성물에 비해 더욱 향상되고 우수한 물리적 성질 및 내구성을 나타낼 뿐만 아니라 친환경적인 레미콘 조성물에 대한 기술을 제안하려고 한다.Accordingly, the applicant of the present application intends to propose a technology for an eco-friendly ready-mixed concrete composition, as well as more improved and excellent physical properties and durability compared to the existing ready-mixed concrete composition.
본 발명은 상술한 종래의 문제점을 해소 및 이를 감안하여 안출된 것으로서, 우수한 물리적 성질 및 내구성을 나타낼 뿐만 아니라 친환경적인 레미콘 조성물 및 이의 제조방법을 제공하는데 그 목적이 있다.The present invention has been devised in consideration of and solving the above-described problems in the related art, and has an object thereof to provide an eco-friendly ready-mixed concrete composition and a method of manufacturing the same as well as exhibiting excellent physical properties and durability.
본 발명은 경량골재 및 잔골재가 4 내지 6: 6 내지 4의 비율로 혼합된 골재 60 내지 80 중량부; 시멘트 5 내지 20 중량부; 고로슬래그 미분말 1 내지 5 중량부; 및 레미콘 회수수를 함유하는 물 5 내지 15 중량부를 포함하고,The present invention is a lightweight aggregate and a fine aggregate from 4 to 6: 60 to 80 parts by weight of aggregate mixed in a ratio of 6 to 4; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And 5 to 15 parts by weight of water containing ready-mixed concrete recovered water,
상기 경량골재는 이산화탄소를 흡착하기 위해 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 1 내지 10 중량부의 활성탄을 혼합하고 열처리하여 표면에 질소 작용기를 포함하되, 함수율이 0.5% 내지 3%인 것이며,The lightweight aggregate contains nitrogen functional groups on the surface by mixing and heat-treating 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon to adsorb carbon dioxide, but the moisture content is 0.5% to 3 %,
상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부로 포함하는 레미콘 조성물을 제공한다.The ready-mixed concrete recovered water provides a ready-mixed concrete composition comprising 3 to 15 parts by weight based on 100 parts by weight of water.
또한, 본 발명은 경량골재 표면에 질소 작용기를 형성하기 위해 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 1 내지 10 중량부의 활성탄을 혼합하고 암모니아 수용액 존재하에서 열처리하여 표면이 질소로 개질된 경량골재를 제조하는 단계;In addition, the present invention mixes 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon to form a nitrogen functional group on the surface of the lightweight aggregate, and heat treatment in the presence of an aqueous ammonia solution to make the surface nitrogen. Manufacturing a modified lightweight aggregate;
상기 제조된 경량골재 및 잔골재를 4 내지 6: 6 내지 4의 비율로 혼합하여 골재를 제조하는 단계;Mixing the prepared lightweight aggregate and fine aggregate in a ratio of 4 to 6: 6 to 4 to prepare an aggregate;
상기 제조된 골재 60 내지 80 중량부; 시멘트 5 내지 20 중량부; 고로슬래그 미분말 1 내지 5 중량부; 및 레미콘 회수수를 함유하는 물 5 내지 15 중량부의 비율로 혼합하는 단계를 포함하고,60 to 80 parts by weight of the prepared aggregate; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And mixing in a ratio of 5 to 15 parts by weight of water containing ready-mixed concrete recovered water,
상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부로 혼합한 것을 특징으로 하는 레미콘 조성물의 제조방법을 제공한다.The ready-mixed concrete recovered water provides a method for producing a ready-mixed concrete composition, characterized in that 3 to 15 parts by weight of water are mixed with respect to 100 parts by weight of water.
본 발명에 따르면, 폐석분, 바텀애쉬 및 활성탄을 포함하는 경량골재의 표면에 질소 작용기를 포함하여 경량골재 사용으로 인해 발생하는 중성화 현상을 방지할 수 있고 중금속을 흡착할 수 있으며, 고로슬래그 미분말과 레미콘 회수수를 포함함으로써, 콘크리트의 우수한 물리적 성질 및 내구성을 나타낼 뿐만 아니라 산업부산물의 재활용 측면에서도 유용한 효과를 달성할 수 있다.According to the present invention, it is possible to prevent neutralization caused by the use of the lightweight aggregate by including nitrogen functional groups on the surface of the lightweight aggregate including waste-rock powder, bottom ash, and activated carbon, and to adsorb heavy metals, and By including ready-mixed concrete recovered water, not only excellent physical properties and durability of concrete can be displayed, but also useful effects can be achieved in terms of recycling industrial by-products.
도 1은 본 발명의 일 실시예에 따른 레미콘 조성물의 제조방법을 나타낸 순서도이다.
도 2는 본 발명의 일 실시예에 따른 경량골재를 제조하는 단계를 나타낸 순서도이다.1 is a flow chart showing a method of manufacturing a ready-mixed concrete composition according to an embodiment of the present invention.
Figure 2 is a flow chart showing the steps of manufacturing a lightweight aggregate according to an embodiment of the present invention.
본 발명에 대해 첨부한 도면을 참조하여 바람직한 실시예를 설명하면 다음과 같으며, 이와 같은 상세한 설명을 통해서 본 발명의 목적과 구성 및 그에 따른 특징들을 보다 잘 이해할 수 있게 될 것이다.A preferred embodiment of the present invention will be described with reference to the accompanying drawings, and it will be possible to better understand the objects and configurations of the present invention, and features thereof, through such detailed description.
본 발명은 경량골재 및 잔골재가 4 내지 6: 6 내지 4의 비율로 혼합된 골재 60 내지 80 중량부; 시멘트 5 내지 20 중량부; 고로슬래그 미분말 1 내지 5 중량부; 및 레미콘 회수수를 함유하는 물 5 내지 15 중량부를 포함하고,The present invention is a lightweight aggregate and a fine aggregate from 4 to 6: 60 to 80 parts by weight of aggregate mixed in a ratio of 6 to 4; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And 5 to 15 parts by weight of water containing ready-mixed concrete recovered water,
상기 경량골재는 이산화탄소를 흡착하기 위해 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 1 내지 10 중량부의 활성탄을 혼합하고 열처리하여 표면에 질소 작용기를 포함하되, 함수율이 0.5% 내지 3%인 것이며,The lightweight aggregate contains nitrogen functional groups on the surface by mixing and heat-treating 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon to adsorb carbon dioxide, but the moisture content is 0.5% to 3 %,
상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부로 포함하는 레미콘 조성물을 제공한다.The ready-mixed concrete recovered water provides a ready-mixed concrete composition comprising 3 to 15 parts by weight based on 100 parts by weight of water.
상기 골재는 경량골재 및 잔골재가 4 내지 6 또는 4.5 내지 5.5: 6 내지 4 또는 4.5 내지 5.5의 비율로 혼합된 것일 수 있다. 상기와 같은 비율로 경량골재와 잔골재의 비율을 조절하는 경우 적절한 슬럼프치를 가져 강도와 내구성이 향상된 레미콘 조성물을 제공할 수 있다.The aggregate may be a mixture of lightweight aggregates and fine aggregates in a ratio of 4 to 6 or 4.5 to 5.5: 6 to 4 or 4.5 to 5.5. When the ratio of the lightweight aggregate and the fine aggregate is adjusted in the ratio as described above, it is possible to provide a ready-mixed concrete composition having an appropriate slump value and improved strength and durability.
상기 경량골재는 20 내지 80 중량부, 30 내지 70 중량부 또는 40 내지 60 중량부의 폐석분, 20 내지 80 중량부, 30 내지 70 중량부 또는 40 내지 60 중량부의 바텀애쉬 및 1 내지 10 중량부, 1 내지 7 중량부 또는 1 내지 5 중량부를 혼합하고 열처리하여 제조한 것일 수 있다. 구체적으로, 상기 경량골재는 폐석분, 바텀애쉬 및 활성탄을 상기와 같은 비율로 혼합한 뒤 1000℃ 내지 1150℃의 온도에서 10 내지 30분 동안 열처리하여 제조한 것일 수 있다. 보다 구체적으로, 상기 경량골재는 폐석분, 바텀애쉬 및 활성탄을 상기와 같은 비율로 혼합한 뒤 1000℃ 내지 1150℃의 온도에서 10 내지 30분 동안 열처리한 이후에 암모니아 수용액 존재하에 50℃ 내지 150℃, 70℃ 내지 150℃ 또는 90℃ 내지 120℃의 온도에서 5시간 내지 15시간, 7시간 내지 15시간 또는 9시간 내지 12시간 동안 수열합성하여 제조한 것일 수 있다.The lightweight aggregate is 20 to 80 parts by weight, 30 to 70 parts by weight or 40 to 60 parts by weight of waste-rock powder, 20 to 80 parts by weight, 30 to 70 parts by weight or 40 to 60 parts by weight of bottom ash and 1 to 10 parts by weight, It may be prepared by mixing 1 to 7 parts by weight or 1 to 5 parts by weight and heat treatment. Specifically, the lightweight aggregate may be prepared by mixing waste-rock powder, bottom ash, and activated carbon in the same ratio as described above and then heat-treating at a temperature of 1000°C to 1150°C for 10 to 30 minutes. More specifically, the lightweight aggregate is 50° C. to 150° C. in the presence of an aqueous ammonia solution after mixing waste-rock powder, bottom ash, and activated carbon in the same ratio and heat treatment at a temperature of 1000° C. to 1150° C. for 10 to 30 minutes. , It may be prepared by hydrothermal synthesis for 5 hours to 15 hours, 7 hours to 15 hours or 9 hours to 12 hours at a temperature of 70 ℃ to 150 ℃ or 90 ℃ to 120 ℃.
상기와 같은 경량골재는 활성탄을 포함하고, 경량골재 표면에 질소 작용기를 포함함으로써, 중금속을 흡착할 수 있고, 탄산가스 또는 이산화탄소를 흡착하여 경량골재로 인해 발생하는 중성화 현상을 방지할 수 있다.The lightweight aggregate as described above includes activated carbon and includes nitrogen functional groups on the surface of the lightweight aggregate, thereby adsorbing heavy metals and adsorbing carbon dioxide or carbon dioxide to prevent neutralization caused by the lightweight aggregate.
또한, 상기와 같은 조건에서 제조된 경량골재는 함수율이 0.5% 내지 3% 또는 1% 내지 2.5%를 나타낼 수 있다. 이에 따라 폭렬이 발생하지 않아 경량골재로 사용할 수 있다. 이때 상기 경량골재는 단일입도로, 10 내지 30mm의 범위의 입도를 가지는 것일 수 있다. 경량골재가 상기와 같은 단일입도를 가지는 경우 연속입도를 가지는 경우와 비교하여 우수한 슬럼프 값을 가질 수 있다.In addition, the lightweight aggregate manufactured under the above conditions may have a water content of 0.5% to 3% or 1% to 2.5%. Accordingly, the explosion does not occur, so it can be used as a lightweight aggregate. At this time, the lightweight aggregate may have a single particle size and a particle size in the range of 10 to 30 mm. When the lightweight aggregate has a single particle size as described above, it may have an excellent slump value compared to the case of a continuous particle size.
더불어, 상기 경량골재는 황산나트륨, 산화철, 황산칼슘 및 탄산칼슘 중 어느 하나 이상을 추가로 포함하고, 구체적으로 황산나트륨은 0.1 내지 10 중량% 또는 0.5 내지 5 중량%으로 포함하고, 산화철은 0.1 내지 10 중량% 또는 0.5 내지 5 중량%으로 포함하고, 황산칼슘은 0.5 내지 15 중량% 또는 1 내지 10 중량%으로 포함하고, 탄산칼슘은 1 내지 20 중량% 또는 5 내지 15 중량%으로 포함할 수 있다. In addition, the lightweight aggregate further includes any one or more of sodium sulfate, iron oxide, calcium sulfate and calcium carbonate, specifically sodium sulfate 0.1 to 10% by weight or 0.5 to 5% by weight, iron oxide 0.1 to 10% by weight % Or 0.5 to 5% by weight, calcium sulfate may be included in 0.5 to 15% by weight or 1 to 10% by weight, and calcium carbonate may be included in 1 to 20% by weight or 5 to 15% by weight.
본 발명의 레미콘 조성물은 결합재로 시멘트 및 고로슬래그 미분말을 사용한다. 이때, 시멘트는 포틀랜드 시멘트를 사용할 수 있고, 고로슬래그 미분말은 잠재수경성 특성을 가져 강도 및 내구성 향상을 위한 것이다.The ready-mixed concrete composition of the present invention uses cement and blast furnace slag fine powder as a binder. At this time, Portland cement can be used as the cement, and the blast furnace slag fine powder has latent hydraulic properties to improve strength and durability.
구체적으로, 상기 시멘트는 5 내지 20 중량부, 7 내지 20 중량부 또는 10 내지 18 중량부로 포함하고, 상기 고로슬래그 미분말은 1 내지 5 중량부 또는 2 내지 5 중량부로 포함할 수 있다. 상기와 같은 비율로 시멘트 및 고로슬래그 미분말을 사용하여 레미콘 조성물의 공기율을 적절하게 조절하고 블리딩률을 감소시킬 수 있다.Specifically, the cement may be included in an amount of 5 to 20 parts by weight, 7 to 20 parts by weight, or 10 to 18 parts by weight, and the fine blast furnace slag powder may be included in an amount of 1 to 5 parts by weight or 2 to 5 parts by weight. By using the cement and blast furnace slag powder in the same ratio as described above, the air ratio of the ready-mixed concrete composition can be appropriately adjusted and the bleeding rate can be reduced.
본 발명의 레미콘 조성물은 레미콘 회수수를 함유하는 물을 5 내지 15 중량부 또는 5 내지 12 중량부로 포함할 수 있다. 이때, 레미콘 회수수는 알칼리 자극제로 사용된다. 구체적으로, 상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부 또는 5 내지 10 중량부로 포함할 수 있다. 상기와 같은 비율로 레미콘 회수수를 함유하는 물을 포함하는 경우 콘크리트 제조시 압축강도 및 생산효율을 향상시키고 레미콘 회수수를 재활용함으로써 환경오염을 줄일 수 있다.The ready-mixed concrete composition of the present invention may include 5 to 15 parts by weight or 5 to 12 parts by weight of water containing the recovered ready-mixed concrete. At this time, the ready-mixed concrete recovered water is used as an alkali stimulating agent. Specifically, the ready-mixed concrete recovered water may include 3 to 15 parts by weight or 5 to 10 parts by weight based on 100 parts by weight of water. When water containing ready-mixed concrete recovered water is included in the ratio as described above, it is possible to reduce environmental pollution by improving the compressive strength and production efficiency during concrete manufacturing and recycling the recovered ready-mixed concrete.
구체적으로, 상기 레미콘 회수수를 함유하는 물은 수산화칼슘을 추가로 포함할 수 있다. 보다 구체적으로, 상기 레미콘 회수수를 함유하는 물은 1 내지 5 중량% 또는 1 내지 3중량%의 수산화칼슘을 포함할 수 있다. 상기와 같은 수산화칼슘을 포함하는 경우 그렇지 않은 경우와 비교하여 종결시간은 유사하나 압축강도가 향상될 수 있다.Specifically, the water containing the ready-mixed concrete recovered water may further contain calcium hydroxide. More specifically, the water containing the ready-mixed concrete recovered water may contain 1 to 5% by weight or 1 to 3% by weight of calcium hydroxide. In the case of containing calcium hydroxide as described above, the termination time is similar to that of the case where it is not, but the compressive strength may be improved.
본 발명의 레미콘 조성물은 폴리카르본산계 유동화제 및 증점제 중 어느 하나 이상을 추가로 포함할 수 있다. 구체적으로, 상기 폴리카르본산계 유동화제는 결합재에 대하여 0.01 내지 5 중량% 또는 0.1 내지 3중량%로 포함할 수 있고, 이에 따라 강도 및 내구성의 개선 효과가 뛰어난 레미콘 조성물을 제공할 수 있다.The ready-mixed concrete composition of the present invention may further include any one or more of a polycarboxylic acid-based fluidizing agent and a thickening agent. Specifically, the polycarboxylic acid-based fluidizing agent may be included in an amount of 0.01 to 5% by weight or 0.1 to 3% by weight based on the binder, and accordingly, a ready-mixed concrete composition having excellent strength and durability improvement effects may be provided.
또한, 본 발명은 경량골재 표면에 질소 작용기를 형성하기 위해 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 1 내지 10 중량부의 활성탄을 혼합하고 암모니아 수용액 존재하에서 열처리하여 표면이 질소로 개질된 경량골재를 제조하는 단계;In addition, the present invention mixes 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon to form a nitrogen functional group on the surface of the lightweight aggregate, and heat treatment in the presence of an aqueous ammonia solution to make the surface nitrogen. Manufacturing a modified lightweight aggregate;
상기 제조된 경량골재 및 잔골재를 4 내지 6: 6 내지 4의 비율로 혼합하여 골재를 제조하는 단계;Mixing the prepared lightweight aggregate and fine aggregate in a ratio of 4 to 6: 6 to 4 to prepare an aggregate;
상기 제조된 골재 60 내지 80 중량부; 시멘트 5 내지 20 중량부; 고로슬래그 미분말 1 내지 5 중량부; 및 레미콘 회수수를 함유하는 물 5 내지 15 중량부의 비율로 혼합하는 단계를 포함하고,60 to 80 parts by weight of the prepared aggregate; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And mixing in a ratio of 5 to 15 parts by weight of water containing ready-mixed concrete recovered water,
상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부로 혼합한 것을 특징으로 하는 레미콘 조성물의 제조방법을 제공한다.The ready-mixed concrete recovered water provides a method for preparing a ready-mixed concrete composition, characterized in that 3 to 15 parts by weight of the water is mixed with 100 parts by weight of water.
도 1은 본 발명에 따른 레미콘 조성물의 제조방법을 나타낸 순서도이다. 도 1에 나타낸 바와 같이, 본 발명의 레미콘 조성물의 제조방법은 폐석분, 바텀애쉬 및 활성탄을 혼합하여 경량골재를 제조하는 단계(S100); 경량골재와 잔골재를 혼합하여 골재를 제조하는 단계(S200); 및 상기 제조된 골재, 결합재 및 레미콘 회수수를 함유하는 물을 일정 비율로 혼합하는 단계(S300)를 포함한다.1 is a flow chart showing a method of manufacturing a ready-mixed concrete composition according to the present invention. As shown in Figure 1, the method for producing a ready-mixed concrete composition of the present invention comprises the steps of preparing a lightweight aggregate by mixing waste-rock powder, bottom ash, and activated carbon (S100); Mixing the lightweight aggregate and the fine aggregate to produce an aggregate (S200); And mixing the prepared aggregate, the binder, and the water containing the ready-mixed concrete recovered water in a predetermined ratio (S300).
도 2는 본 발명에 따른 경량골재를 제조하는 단계를 나타낸 순서도이다. 상기 경량골재를 제조하는 단계는 도 2에 도시한 바와 같이 하기의 과정을 통해 수행된다:Figure 2 is a flow chart showing the steps of manufacturing a lightweight aggregate according to the present invention. The step of preparing the lightweight aggregate is carried out through the following process as shown in FIG. 2:
(A) 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 1 내지 10 중량부의 활성탄을 건조상태에서 균일하게 혼합시킨 분말을 70℃ 내지 150℃의 온도에서 20 내지 30시간 동안 건조시키는 과정(S110);(A) 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon are uniformly mixed in a dry state, and the powder is dried at a temperature of 70° C. to 150° C. for 20 to 30 hours. Process (S110);
(B) 상기 건조된 분말을 회전관상로 내에서 1000℃ 내지 1150℃의 온도에서 10 내지 30분 동안 열처리하는 과정(S120);(B) heat-treating the dried powder at a temperature of 1000° C. to 1150° C. for 10 to 30 minutes in a rotary tube furnace (S120);
(C) 상기 열처리한 분말을 암모니아 수용액 존재하에서 수열합성하는 과정(S130);(C) hydrothermal synthesis of the heat-treated powder in the presence of an aqueous ammonia solution (S130);
(D) 상기 수열합성 과정을 통해 질소 작용기가 형성된 분말을 냉각하고 입도분리하는 과정(S140); 및(D) cooling and particle size separation of the powder having a nitrogen functional group through the hydrothermal synthesis process (S140); And
(E) 상기 분리된 분말에 황산나트륨, 산화철, 황산칼슘 및 탄산칼슘 중 어느 하나 이상을 추가로 혼합하는 과정(S150).(E) The process of further mixing at least one of sodium sulfate, iron oxide, calcium sulfate, and calcium carbonate to the separated powder (S150).
상기 (A) 과정은 산업부산물인 폐석분과 바텀애쉬를 일정 비율로 혼합하고 건조하여 분말을 제조하는 과정이다. 구체적으로, 상기 (A) 과정은 20 내지 80 중량부, 30 내지 70 중량부 또는 40 내지 60 중량부의 폐석분; 20 내지 80 중량부, 30 내지 70 중량부 또는 40 내지 60 중량부의 바텀애쉬; 및 1 내지 10 중량부, 1 내지 7 중량부 또는 1 내지 5 중량부의 활성탄을 건조상태에서 균일하게 혼합시킨 분말을 70℃ 내지 150℃ 또는 100℃ 내지 120℃의 온도에서 20 내지 30시간 또는 22 내지 25시간 동안 건조하여 수행할 수 있다. 상기와 같이 건조함으로써 제조된 경량골재는 함수율이 0.5% 내지 3% 또는 1% 내지 2.5%을 만족할 수 있다.The (A) process is a process of preparing powder by mixing waste-rock powder and bottom ash, which are industrial by-products, at a certain ratio and drying them. Specifically, the (A) process includes 20 to 80 parts by weight, 30 to 70 parts by weight, or 40 to 60 parts by weight of waste-rock meal; 20 to 80 parts by weight, 30 to 70 parts by weight or 40 to 60 parts by weight of bottom ash; And 1 to 10 parts by weight, 1 to 7 parts by weight, or 1 to 5 parts by weight of activated carbon in a dry state and uniformly mixed powder at a temperature of 70°C to 150°C or 100°C to 120°C for 20 to 30 hours or 22 to It can be carried out by drying for 25 hours. The lightweight aggregate prepared by drying as described above may have a moisture content of 0.5% to 3% or 1% to 2.5%.
상기 (B) 과정은 건조된 폐석분과 바텀애쉬의 분말을 소성하는 과정이다. 구체적으로, 상기 (B) 과정은 상기 건조된 분말을 회전관상로 내에서 1000℃ 내지 1150℃ 또는 1050℃ 내지 1100℃의 온도에서 10 내지 30분 또는 10 내지 20분 동안 열처리하여 수행할 수 있다. 상기 회전관상로는 1 내지 1.5m의 길이로 1 내지 5rpm 속도로 회전할 수 있고, 상기와 같은 회전관상로를 사용하는 경우 경량골재가 낮은 밀도와 낮은 흡수율을 가질 수 있다.The (B) process is a process of sintering the dried waste-rock powder and the bottom ash powder. Specifically, the (B) process may be performed by heat treatment for 10 to 30 minutes or 10 to 20 minutes at a temperature of 1000° C. to 1150° C. or 1050° C. to 1100° C. in a rotary tube furnace. The rotary tube furnace may be rotated at a speed of 1 to 5 rpm with a length of 1 to 1.5 m, and when using the rotary tube furnace as described above, the lightweight aggregate may have a low density and low water absorption.
상기 (C) 과정은 암모니아 수용액을 이용한 수열합성을 통해 경량골재의 표면에 질소 작용기를 형성하는 과정이다. 상기 열처리한 분말을 암모니아 수용액 존재하에서 50℃ 내지 150℃, 70℃ 내지 150℃ 또는 90℃ 내지 120℃의 온도에서 5시간 내지 15시간, 7시간 내지 15시간 또는 9시간 내지 12시간 동안 수열합성하여 경량골재의 표면에 질소 작용기를 형성할 수 있다.The (C) process is a process of forming nitrogen functional groups on the surface of the lightweight aggregate through hydrothermal synthesis using an aqueous ammonia solution. Hydrothermal synthesis of the heat-treated powder at a temperature of 50°C to 150°C, 70°C to 150°C or 90°C to 120°C for 5 hours to 15 hours, 7 hours to 15 hours, or 9 hours to 12 hours in the presence of an aqueous ammonia solution Nitrogen functional groups can be formed on the surface of the lightweight aggregate.
상기와 같은 경량골재는 활성탄을 포함하고, 경량골재 표면에 질소 작용기를 형성함으로써, 중금속을 흡착할 수 있고, 탄산가스 또는 이산화탄소를 흡착하여 경량골재로 인해 발생하는 중성화 현상을 방지할 수 있다.The lightweight aggregate as described above includes activated carbon, and by forming a nitrogen functional group on the surface of the lightweight aggregate, it is possible to adsorb heavy metals, and by adsorbing carbon dioxide or carbon dioxide, it is possible to prevent neutralization caused by the lightweight aggregate.
상기 (D) 과정은 수열합성 과정을 통해 질소 작용기가 형성된 분말을 냉각시키고 입도분리하여 단일입도를 가지는 분말을 형성하는 과정이다. 구체적으로, (D) 과정은 10 내지 30mm의 범위의 단일입도를 가지는 분말을 제조할 수 있다. 상기와 같은 단일입도를 가지는 경우 연속입도를 가지는 경우와 비교하여 우수한 슬럼프 값을 가지는 경량골재를 제공할 수 있다.The (D) process is a process of forming a powder having a single particle size by cooling a powder having a nitrogen functional group through a hydrothermal synthesis process and separating the particle size. Specifically, the (D) process can prepare a powder having a single particle size in the range of 10 to 30mm. In the case of having a single particle size as described above, it is possible to provide a lightweight aggregate having an excellent slump value compared to the case of having a continuous particle size.
상기 (E) 과정은 경량골재의 물성을 향상시키기 위해 첨가제를 혼합하는 과정이다. 상기 (E) 과정은 입도분리된 분말에 황산나트륨, 산화철, 황산칼슘 및 탄산칼슘 중 어느 하나 이상을 추가로 첨가하여 수행할 수 있다. 구체적으로, 황산나트륨은 0.1 내지 10 중량% 또는 0.5 내지 5 중량%으로 첨가하고, 산화철은 0.1 내지 10 중량% 또는 0.5 내지 5 중량%으로 첨가하고, 황산칼슘은 0.5 내지 15 중량% 또는 1 내지 10 중량%으로 첨가하고, 탄산칼슘은 1 내지 20 중량% 또는 5 내지 15 중량%으로 첨가할 수 있다.The (E) process is a process of mixing additives to improve the physical properties of the lightweight aggregate. The (E) process may be performed by additionally adding at least one of sodium sulfate, iron oxide, calcium sulfate, and calcium carbonate to the particle size-separated powder. Specifically, sodium sulfate is added in an amount of 0.1 to 10% by weight or 0.5 to 5% by weight, iron oxide is added in an amount of 0.1 to 10% by weight or 0.5 to 5% by weight, and calcium sulfate is 0.5 to 15% by weight or 1 to 10% by weight %, and calcium carbonate may be added in an amount of 1 to 20% by weight or 5 to 15% by weight.
상기 골재를 제조하는 단계는 상기 제조된 경량골재 및 잔골재를 4 내지 6 또는 4.5 내지 5.5: 6 내지 4 또는 4.5 내지 5.5의 비율로 혼합하여 수행할 수 있다. 상기와 같은 비율로 경량골재와 잔골재의 비율을 조절하는 경우 적절한 슬럼프치를 가져 강도와 내구성이 향상된 레미콘 조성물을 제공할 수 있다.The step of preparing the aggregate may be performed by mixing the prepared lightweight aggregate and fine aggregate in a ratio of 4 to 6 or 4.5 to 5.5: 6 to 4 or 4.5 to 5.5. When the ratio of the lightweight aggregate and the fine aggregate is adjusted in the above ratio, it is possible to provide a ready-mixed concrete composition having an appropriate slump value and improved strength and durability.
상기 혼합하는 단계는 상기 제조된 골재 60 내지 80 중량부; 시멘트 5 내지 20 중량부; 고로슬래그 미분말 1 내지 5 중량부; 및 레미콘 회수수를 함유하는 물 5 내지 15 중량부의 비율로 혼합하여 수행할 수 있다.The mixing step includes 60 to 80 parts by weight of the prepared aggregate; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And 5 to 15 parts by weight of water containing ready-mixed concrete recovered water.
여기서 시멘트 및 고로슬래그 미분말은 결합재로 사용되고, 시멘트는 포틀랜드 시멘트를 사용할 수 있고, 고로슬래그 미분말은 잠재수경성 특성을 가져 강도 및 내구성 향상을 위한 것이다.Here, the fine cement and blast furnace slag powder are used as a binder, Portland cement may be used as the cement, and the fine blast furnace slag powder has latent hydraulic properties to improve strength and durability.
구체적으로, 상기 골재 60 내지 80 중량부 또는 65 내지 80 중량부의 비율로, 상기 시멘트는 5 내지 20 중량부, 7 내지 20 중량부 또는 10 내지 18 중량부의 비율로, 상기 고로슬래그 미분말은 1 내지 5 중량부 또는 2 내지 5 중량부의 비율로, 레미콘 회수수를 함유하는 물 5 내지 15 중량부 또는 7 내지 12 중량부의 비율로 혼합할 수 있다. 상기와 같은 비율로 시멘트 및 고로슬래그 미분말을 사용하여 레미콘 조성물의 공기율을 적절하게 조절하고 블리딩률을 감소시킬 수 있다.Specifically, in a ratio of 60 to 80 parts by weight or 65 to 80 parts by weight of the aggregate, the cement in a ratio of 5 to 20 parts by weight, 7 to 20 parts by weight or 10 to 18 parts by weight, and the blast furnace slag fine powder is 1 to 5 It may be mixed in a ratio of 5 to 15 parts by weight or 7 to 12 parts by weight of water containing ready-mixed concrete recovered water in a ratio of 2 to 5 parts by weight or 2 to 5 parts by weight. By using the cement and blast furnace slag powder in the same ratio as described above, the air ratio of the ready-mixed concrete composition can be appropriately adjusted and the bleeding rate can be reduced.
또한, 상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부 또는 5 내지 12 중량부의 비율로 혼합할 수 있다. 이때, 레미콘 회수수는 알칼리 자극제로 사용된다. 구체적으로, 상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부 또는 5 내지 10 중량부의 비율로 혼합할 수 있다. 상기와 같은 비율로 레미콘 회수수를 함유하는 물을 사용하는 경우 콘크리트 제조시 압축강도 및 생산효율을 향상시키고 레미콘 회수수를 재활용함으로써 환경오염을 줄일 수 있다.In addition, the ready-mixed concrete recovered water may be mixed in a ratio of 3 to 15 parts by weight or 5 to 12 parts by weight based on 100 parts by weight of water. At this time, the ready-mixed concrete recovered water is used as an alkali stimulating agent. Specifically, the ready-mixed concrete recovered water may be mixed in a ratio of 3 to 15 parts by weight or 5 to 10 parts by weight based on 100 parts by weight of water. In the case of using water containing ready-mixed concrete recovered water in the above ratio, it is possible to reduce environmental pollution by improving the compressive strength and production efficiency during concrete manufacturing and recycling the recovered ready-mixed concrete.
구체적으로, 상기 레미콘 회수수를 함유하는 물은 수산화칼슘을 추가로 포함할 수 있다. 보다 구체적으로, 상기 레미콘 회수수를 함유하는 물은 1 내지 5 중량% 또는 1 내지 3중량%의 수산화칼슘을 포함할 수 있다. 상기와 같은 수산화칼슘을 포함하는 경우 그렇지 않은 경우와 비교하여 종결시간은 유사하나 압축강도가 향상될 수 있다.Specifically, the water containing the ready-mixed concrete recovered water may further contain calcium hydroxide. More specifically, the water containing the ready-mixed concrete recovered water may contain 1 to 5% by weight or 1 to 3% by weight of calcium hydroxide. In the case of containing calcium hydroxide as described above, the termination time is similar to that of the case where it is not, but the compressive strength may be improved.
또한, 상기 혼합하는 단계는 폴리카르본산계 유동화제 및 증점제 중 어느 하나 이상을 추가로 첨가할 수 있다. 구체적으로, 상기 폴리카르본산계 유동화제는 결합재에 대하여 0.01 내지 5 중량% 또는 0.1 내지 3중량%의 비율로 혼합할 수 있고, 이에 따라 강도 및 내구성의 개선 효과가 뛰어난 레미콘 조성물을 제공할 수 있다.In addition, in the mixing step, any one or more of a polycarboxylic acid-based fluidizing agent and a thickening agent may be additionally added. Specifically, the polycarboxylic acid-based fluidizing agent may be mixed in a ratio of 0.01 to 5% by weight or 0.1 to 3% by weight with respect to the binder, and accordingly, a ready-mixed concrete composition having excellent strength and durability improvement effects may be provided. .
이상의 설명은, 본 발명의 구체적인 실시예에 관한 것이나 본 발명에 따른 상기 실시예는 설명의 목적으로 개시된 사항이고 본 발명의 범위를 제한하는 것으로 이해되지는 않으며, 해당 기술분야에서 통상의 지식을 가진 자라면 본 발명의 본질을 벗어나지 아니하고 개시된 실시예에 대해 다양한 변경 및 수정이 가능한 것으로 이해되어야 한다. 따라서, 이러한 모든 수정과 변경은 특허청구범위에 개시된 발명의 범위 또는 이들의 균등물에 해당하는 것으로 이해될 수 있다.The above description relates to specific embodiments of the present invention, but the above embodiments according to the present invention are disclosed for the purpose of explanation and are not understood to limit the scope of the present invention, and those skilled in the art It should be understood that various changes and modifications can be made to the disclosed embodiments without departing from the essence of the present invention. Accordingly, all such modifications and changes may be understood to correspond to the scope of the invention disclosed in the claims or their equivalents.
S100: 경량골재를 제조하는 단계
S200: 경량골재 및 잔골재를 혼합하여 골재를 제조하는 단계
S300: 골재, 결합재 및 물을 일정 비율로 혼합하는 단계
S110: 폐석부, 바텀애쉬 및 활성탄을 건조시키는 과정
S120: 건조된 분말을 열처리하는 과정
S130: 열처리한 분말을 암모니아 수용액과 수열합성하는 과정
S140: 수열합성된 분말을 냉각하고 입도분리하는 과정
S150: 첨가제를 추가로 혼합하는 과정S100: manufacturing a lightweight aggregate
S200: Step of preparing an aggregate by mixing a lightweight aggregate and a fine aggregate
S300: mixing aggregate, binder, and water in a certain ratio
S110: Process of drying the waste-rock part, bottom ash and activated carbon
S120: The process of heat-treating the dried powder
S130: Process of hydrothermal synthesis of heat-treated powder with aqueous ammonia solution
S140: The process of cooling and particle size separation of the hydrothermal synthesized powder
S150: process of further mixing additives
Claims (7)
상기 경량골재는 이산화탄소를 흡착하기 위해 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 1 내지 10 중량부의 활성탄을 혼합하고 열처리한 후 암모니아 수용액 존재하에서 수열합성하여 제조한 것으로, 표면에 질소 작용기를 포함하고 함수율이 0.5% 내지 3%인 것이며,
상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부로 포함하는 레미콘 조성물.60 to 80 parts by weight of aggregates in which lightweight aggregates and fine aggregates are mixed in a ratio of 4 to 6: 6 to 4; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And 5 to 15 parts by weight of water containing ready-mixed concrete recovered water,
The lightweight aggregate is prepared by mixing and heat-treating 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon to adsorb carbon dioxide, and then hydrothermal synthesis in the presence of an aqueous ammonia solution. It contains a nitrogen functional group and has a moisture content of 0.5% to 3%,
The ready-mixed concrete recovered water is a ready-mixed concrete composition comprising 3 to 15 parts by weight based on 100 parts by weight of water.
상기 경량골재는 40 내지 60 중량부의 폐석분, 40 내지 60 중량부의 바텀애쉬 및 1 내지 5 중량부의 활성탄을 혼합하고 열처리한 후 암모니아 수용액 존재하에서 수열합성하여 경량골재 표면에 질소 작용기를 포함하는 것을 특징으로 하는 레미콘 조성물.The method of claim 1,
The lightweight aggregate comprises nitrogen functional groups on the surface of the lightweight aggregate by mixing and heat-treating 40 to 60 parts by weight of waste-rock powder, 40 to 60 parts by weight of bottom ash, and 1 to 5 parts by weight of activated carbon, followed by hydrothermal synthesis in the presence of an aqueous ammonia solution. Ready-mixed concrete composition.
상기 레미콘 조성물은 폴리카르본산계 유동화제 및 증점제 중 어느 하나 이상을 추가로 포함하는 레미콘 조성물.The method of claim 1,
The ready-mixed concrete composition further comprises any one or more of a polycarboxylic acid-based fluidizing agent and a thickening agent.
상기 제조된 경량골재 및 잔골재를 4 내지 6: 6 내지 4의 비율로 혼합하여 골재를 제조하는 단계;
상기 제조된 골재 60 내지 80 중량부; 시멘트 5 내지 20 중량부; 고로슬래그 미분말 1 내지 5 중량부; 및 레미콘 회수수를 함유하는 물 5 내지 15 중량부의 비율로 혼합하는 단계를 포함하고,
상기 레미콘 회수수는 물 100 중량부를 기준으로 3 내지 15 중량부로 혼합한 것을 특징으로 하는 레미콘 조성물의 제조방법.In order to form a nitrogen functional group on the surface of the lightweight aggregate, 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon are mixed and heat treated, and then hydrothermal synthesis in the presence of an aqueous ammonia solution is performed to modify the surface to nitrogen Manufacturing the lightweight aggregate;
Mixing the prepared lightweight aggregate and fine aggregate in a ratio of 4 to 6: 6 to 4 to prepare an aggregate;
60 to 80 parts by weight of the prepared aggregate; 5 to 20 parts by weight of cement; 1 to 5 parts by weight of blast furnace slag fine powder; And mixing in a ratio of 5 to 15 parts by weight of water containing ready-mixed concrete recovered water,
The ready-mixed concrete recovered water is a method of producing a ready-mixed concrete composition, characterized in that the mixture is 3 to 15 parts by weight based on 100 parts by weight of water.
경량골재를 제조하는 단계는 폐석분 40 내지 60 중량부 및 바텀애쉬 40 내지 60 중량부로 혼합하고 회전관상로 내에서 1000℃ 내지 1150℃의 온도에서 10 내지 30분 동안 소성하는 것을 특징으로 하는 레미콘 조성물의 제조방법.The method of claim 4,
The step of preparing the lightweight aggregate is mixed with 40 to 60 parts by weight of waste-rock powder and 40 to 60 parts by weight of bottom ash, and calcined for 10 to 30 minutes at a temperature of 1000°C to 1150°C in a rotary tube furnace. Method of manufacturing.
경량골재를 제조하는 단계는,
(A) 20 내지 80 중량부의 폐석분, 20 내지 80 중량부의 바텀애쉬 및 및 1 내지 10 중량부의 활성탄을 건조상태에서 균일하게 혼합시킨 분말을 70℃ 내지 150℃의 온도에서 20 내지 30시간 동안 건조시키는 과정(S110);
(B) 상기 건조된 분말을 회전관상로 내에서 1000℃ 내지 1150℃의 온도에서 10 내지 30분 동안 열처리하는 과정(S120); 및
(C) 상기 열처리한 분말을 암모니아 수용액 존재하에서 수열합성하는 과정(S130);을 포함하는 레미콘 조성물의 제조방법.The method of claim 4,
The step of manufacturing a lightweight aggregate,
(A) 20 to 80 parts by weight of waste-rock powder, 20 to 80 parts by weight of bottom ash, and 1 to 10 parts by weight of activated carbon are uniformly mixed in a dry state and dried for 20 to 30 hours at a temperature of 70°C to 150°C Letting process (S110);
(B) heat-treating the dried powder at a temperature of 1000°C to 1150°C for 10 to 30 minutes in a rotary tube furnace (S120); And
(C) a process of hydrothermal synthesis of the heat-treated powder in the presence of an aqueous ammonia solution (S130).
상기 혼합하는 단계는 폴리카르본산계 유동화제 및 증점제 중 어느 하나 이상을 추가로 첨가하는 것을 특징으로 하는 레미콘 조성물의 제조방법.The method of claim 4,
The mixing step is a method for producing a ready-mixed concrete composition, characterized in that the addition of any one or more of a polycarboxylic acid-based fluidizing agent and a thickener.
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