KR20030052339A - Method of making fresh concrete by using LD slag for a artificial reef - Google Patents
Method of making fresh concrete by using LD slag for a artificial reef Download PDFInfo
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- KR20030052339A KR20030052339A KR1020010082225A KR20010082225A KR20030052339A KR 20030052339 A KR20030052339 A KR 20030052339A KR 1020010082225 A KR1020010082225 A KR 1020010082225A KR 20010082225 A KR20010082225 A KR 20010082225A KR 20030052339 A KR20030052339 A KR 20030052339A
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- slag
- steel slag
- steelmaking slag
- steelmaking
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- 239000002893 slag Substances 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000009628 steelmaking Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 25
- 229910000831 Steel Inorganic materials 0.000 abstract description 15
- 239000010959 steel Substances 0.000 abstract description 15
- 229910052742 iron Inorganic materials 0.000 abstract description 10
- 230000032683 aging Effects 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 8
- 238000001723 curing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000049 pigment Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 241000195493 Cryptophyta Species 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 230000012010 growth Effects 0.000 description 4
- 235000018102 proteins Nutrition 0.000 description 4
- 102000004169 proteins and genes Human genes 0.000 description 4
- 108090000623 proteins and genes Proteins 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- -1 Iron ions Chemical class 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000029553 photosynthesis Effects 0.000 description 2
- 238000010672 photosynthesis Methods 0.000 description 2
- 235000004252 protein component Nutrition 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001474374 Blennius Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 230000003698 anagen phase Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000010920 waste tyre Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/70—Artificial fishing banks or reefs
-
- 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
- C04B18/142—Steelmaking slags, converter slags
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/046—Artificial reefs
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Environmental Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Animal Husbandry (AREA)
- Zoology (AREA)
- Marine Sciences & Fisheries (AREA)
- Biodiversity & Conservation Biology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Artificial Fish Reefs (AREA)
Abstract
Description
본 발명은 인공어초에 관한 것으로, 보다 상세하게는 제강슬래그를 재활용한 콘크리트 인공어초용 생콘크리트의 제조방법에 관한 것이다.The present invention relates to artificial reefs, and more particularly to a method for producing raw concrete for artificial reefs recycled steelmaking slag.
제철소에서 철을 제조 공정에서 발생하는 부산물인 슬래그는 고온의 용융상태로 발생되기 때문에 액상 상태이다. 용융 슬래그는 그 목적에 따라 냉각과정을 통해 고상화시킨 후 파쇄 공정을 거친다. 이러한 기존의 처리공정을 통해 제조된 슬래그는 통상 약 30mm 이하의 입도를 가지게 된다. 이후에 그대로 또는 적정 입도의 크기로 조정되어, 현재까지는 슬래그의 활용은 거의 대부분 건축, 토목용 재료 분야에 편중되어 왔으며, 지금도 이 분야에서의 좀 더 효율적인 활용을 위한 연구는 계속 되고 있다.Slag, a by-product of iron production in steel mills, is in a liquid state because it is produced in a hot molten state. The molten slag is solidified through cooling and then crushed according to its purpose. Slag produced through such a conventional treatment process will usually have a particle size of about 30mm or less. Since it has been adjusted as it is or the size of the appropriate particle size, until now, the use of slag has been mostly concentrated in the field of construction and civil engineering materials, and the research for more efficient use in this field continues.
슬래그는 크게 두 종류로써 제선공정에서 발생되는 고로슬래그와 제강공정에서 발생되는 제강슬래그가 있다. 이 두 슬래그는 그 특성에 따라 차별되게 활용된다.즉, 고로슬래그는 화학성분의 특성상 용융상태에서 물로서 급속히 냉각 응고시킬 경우 비정질의 입상을 제조할 수 있으며, 이것을 건조한 후 미세 분말로 분쇄할 경우 시멘트와 유사한 수경성을 가지게 되어 시멘트 및 콘크리트 혼화제로 사용된다. 그대로, 서냉할 경우는 별도의 처리(aging)과정을 거쳐서 황(S)성분을 제거한 후 도로용 골재나 토목 공사용 채움재뿐만 아니라 콘크리트용 골재로써도 손색 없이 사용할 수 있다.There are two main types of slag: blast furnace slag generated in the steelmaking process and steelmaking slag generated in the steelmaking process. These two slags are used differently according to their properties, that is, blast furnace slag can produce amorphous granules when rapidly cooled and solidified as water in the molten state due to the nature of the chemical composition. It is used as cement and concrete admixture because it has hydraulic property similar to cement. As it is, in case of slow cooling, after removing sulfur (S) through a separate treatment (aging) process, it can be used as a concrete aggregate as well as road aggregate or civil engineering fill material.
제강슬래그는 타성분에 비해 CaO 함량이 상대적으로 많아서, 별도의 처리 과정을 거치지 않으면 팽창하는 성질이 남아 있게 되어서 그대로 토목용 골재 등으로 활용하기는 어렵다. 가장 보편적인 제강슬래그의 에이징(aging) 처리 방법은 자연 에이징법으로써 넓은 장소에 제강슬래그를 방치한 상태에서 일정기간 동안 유지시켜 잠재 팽창을 없앤 후 사용하며, 에이징 기간은 사용 목적에 따라 조절한다.Steelmaking slag has a relatively high content of CaO compared to other components, it is difficult to utilize as an aggregate for civil engineering, as it remains in the expanding property without undergoing a separate treatment process. The most common aging treatment of steelmaking slag is natural aging, which is used after eliminating potential expansion by maintaining steelmaking slag in a large place for a certain period of time, and the aging period is adjusted according to the purpose of use.
제강슬래그의 활용을 제한하는 요인은 위에서 설명한 유리석회 외에도 많은 철분을 함유하고 있다는 점이다. 제강슬래그가 철분을 많이 함유하는 이유는 제강 조업시 불어주는 산소가 용선내의 불순물 뿐만 아니라 Fe도 산화시키게 되며, 이 산화된 Fe는 산화물 형태로 슬래그화 된다. 그리고, 전로 조업후 용강과 슬래그를 분리하는 과정에서 완벽하게 분리되지 않기 때문에 슬래그 내에 금속 Fe도 존재하게 된다. 이상과 같이 제강슬래그의 철분은 금속 및 산화물형태로 존재하며, Fe 중량 기준으로 약 20%를 차지한다. 이로 인해 제강슬래그는 다른 자연 골재보다 무겁고,경도도 크다는 특징을 가진다. 실제로 이점은 제강슬래그의 활용을 저해하는 가장 치명적인 결점이다. 재료 자체는 토목용 골재로서 우수한 성질을 가지고 있지만, 무겁기 때문에 운송비용이 많이 소요된다. 일반 골재들도 재료 자체의 가격은 비싸지 않고, 판매가격의 대부분은 운송비가 차지하고 있다. 그래서, 제강슬래그가 제철소에서 부산되는 부산물이기 때문에 가격이 싸다는 점도 별다른 장점으로사의 역할을 하지 못할 때가 많다.A limiting factor in the use of steel slag is that it contains a lot of iron in addition to the glass lime described above. The reason why steel slag contains a lot of iron is that the oxygen blown during steelmaking operation oxidizes Fe as well as impurities in molten iron, and this oxidized Fe is slagd into an oxide form. In addition, the metal Fe is also present in the slag because it is not completely separated in the process of separating the molten steel and slag after the converter operation. As described above, iron of the steelmaking slag is present in the form of metals and oxides and accounts for about 20% by weight of Fe. Due to this, steelmaking slag is heavier than other natural aggregates and is characterized by high hardness. Indeed, this is the most fatal flaw that hampers the use of steelmaking slag. The material itself has excellent properties as civil engineering aggregates, but it is heavy and therefore expensive to transport. In general aggregates, the price of the material itself is not expensive, and most of the selling price is transportation costs. Therefore, the low price of steelmaking slag is a by-product by-product from steel mills.
그러나, 제강슬래그가 석회분과 철분을 많이 함유하고 있기 때문에, 시멘트 클린커용 원료로 사용된다. 시멘트 클린커의 제조 원료는 약 80% 이상을 석회석(CaCO3)이 차지하는데, 제강슬래그의 주된 역할은 클린커 원료 혼합물이 시멘트 소성로에 투입된 후 노내에서 융점을 낮추어 주는 역할을 하기 때문에, 보다 낮은 온도에서 클린커 광물이 잘 합성될 수 있도록 해주는 중요한 역할을 하고 있다.However, since steelmaking slag contains a lot of lime powder and iron, it is used as a raw material for cement cleaner. Limestone (CaCO 3 ) accounts for more than 80% of the raw materials for the production of cement clinkers. The main role of steel slag is to lower the melting point in the furnace after the mixture of clinker raw materials enters the cement kiln. It plays an important role in the synthesis of clinker minerals at temperature.
이상에서 설명한 바와 같이 슬래그의 주 용도가 토목용으로 대부분 편중되어 있는 이유는 대량으로 발생하는 슬래그를 대량으로 활용할 수 있는 거의 유일한 분야이고, 현재까지 토목용으로의 수요가 많았기 때문이라고 볼 수 있다. 그래서, 현재는 슬래그가 실제로 거의 대부분 재활용되고 있다.As described above, the main purpose of the slag is mainly for civil engineering because it is almost the only field that can utilize a large amount of slag that occurs in large quantities. . So, slag is now actually recycled almost entirely.
그러나, 슬래그 활용에 대한 앞으로의 전망은 밝지않다. 그것은 슬래그와 대체될 수 있는 부산물들이 많이 발생되고 있고, 이 양은 앞으로도 계속 증가될 것이기 때문이다. 예를 들면 건축 폐기물을 들 수 있다. 산업화 시기에 급속하게 구축되었던 건축물들 중에 수명을 다하여 철거되는 물량이 지속적으로 증가되고 있어서, 건축 폐기물들의 발생량도 증가되는 추세이며, 이들은 재생 공정을 통해 다시 재생골재로 사용될 수 있다. 균형적인 자원 재활용을 위해서는 슬래그의 환경 친화적이면서도 특성을 살릴 수 있는 새로운 용도 개발이 필요하다고 볼 수 있다. 그 중에서도 해양 분야는 슬래그의 장점을 살리면서도, 경우에 따라서는 대량으로 활용할 수 있는 분야이다. 그중 인공어초가 유력하다.However, the future outlook for slag utilization is not bright. It is because there are many by-products that can be replaced with slag, and this amount will continue to increase in the future. For example, construction waste. As buildings rapidly removed during the industrialization period, the amount of demolition by end of life continues to increase, and the generation of building wastes is also increasing, and they can be used as recycled aggregates through regeneration processes. Balanced recycling of resources requires the development of new uses that are both environmentally friendly and feature-rich. Among them, the marine sector is a field that can utilize in a large amount in some cases while utilizing the advantages of slag. Among them, artificial reefs are prominent.
인공어초는 연근해에 서식하는 어류, 패류 등의 은신처뿐 아니라 산란장소를 제공함으로써 수자원을 보호하고 또한, 동, 식물성 플랑크톤 및 해초류의 증식을 통하여 치어의 생육을 촉진하기 위해 설치된다. 종래의 인공어초는 콘크리트 구조물이나 폐타이어가 이용되고 있다.Artificial reefs are installed to protect the water resources by providing spawning places as well as hides such as fish and shellfish inhabiting the offshore, and are also installed to promote the growth of fry through the growth of copper, phytoplankton and seaweeds. In conventional artificial reefs, concrete structures or waste tires are used.
본 발명에서는 제강슬래그를 전처리하여 안정화시킨 후 굵은 골재로 사용한 인공어초용 생콘크리트로 제조하는 방법을 제공하는데, 그 목적이 있다.In the present invention, there is provided a method for producing a raw concrete for artificial reef used as a coarse aggregate after stabilizing the steelmaking slag, there is an object thereof.
상기 목적을 달성하기 위한 본 발명의 인공어초용 생콘크리트의 제조방법은, 제강슬래그를 양생하여 부피 팽창율을 0.2% 이하로 조정하는 단계,The method of manufacturing the raw concrete for artificial reefs of the present invention for achieving the above object, the step of curing the steel slag to adjust the volume expansion rate to 0.2% or less,
상기 양생한 제강슬래그를 슬럼프가 6~14가 되도록 배합하는 단계를 포함하여 구성된다.It comprises a step of blending the cured steelmaking slag is 6 to 14 slump.
이하, 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail.
본 발명에서는 제철소 제강공정에서 발생하는 제강슬래그를 이용한다. 제강슬래그의 대표적인 조성의 일례가 아래 표 1에 제시되어 있다.In the present invention, the steelmaking slag generated in the steelmaking steelmaking process is used. An example of a representative composition of steelmaking slag is shown in Table 1 below.
표 1에 나타난 바와 같이, 제강슬래그에는 T-Fe가 많다. 철이온은 조류의 포자가 착생하고 발아한 후 활발하게 세포가 활동하게 하는 색소단백질 구성요소로서 색소단백질의 흡수에 관계가 있고, 성육기에 있어서 세포가 광합성에 필요한 전자전달계의 활동과 색소단백질의 형성이 철이온과 관계가 있는 것으로 알려져 있다. 따라서, T-Fe가 18~22% 정도 함유된 제강슬래그는 인공어초의 원료로서 유용하다.As shown in Table 1, there are many T-Fe in steelmaking slag. Iron ions are a pigment protein component that activates the cells actively after the spores of the algae grow and germinate, and are involved in the absorption of pigment proteins.In the growth stage, the electron transport system required for cell photosynthesis and the formation of pigment proteins It is known to be related to this iron ion. Therefore, steelmaking slag containing about 18 to 22% of T-Fe is useful as a raw material of artificial reefs.
그런데, 제강슬래그에는 타성분에 비해 CaO함량이 상대적으로 많아서 별도의 처리과정을 거치지 않으며 팽창하는 성질이 남아 있어 인공어초의 원료로 하면 외형파손이 발생한다. 따라서, 본 발명에서는 제강슬래그를 안정화처리한다.However, the steelmaking slag has a relatively high CaO content compared to other components, and thus does not undergo a separate treatment process, and thus expands. Therefore, in the present invention, the steelmaking slag is stabilized.
안정화는 사전에 양생 처리함으로써 제강슬래그가 가지고 있는 팽창성을 적정한 한계치 이하로 감소시켜 인공어초용 재료로 사용될 수 있도록 하는 것을 의미한다.본 발명에서 사용한 안정화 방법은 적정한 살수 및 일정기간 동안의 방치를 통해 제강슬래그 내의 유리석회 성분을 소화시키는 것이었다. 이외의 다른 안정화 방법을 사용해도 무관하며, 그 예로써는 자연 강수에 의존하는 자연 양생법, 온수를 사용하는 방법, 증기 양생법 등이 있다. 양생처리에 있어 중요한 것은 제강슬래그의 팽창율을 임계치이하로 조정하는 것이다. 본 발명의 연구와 실험에 따르면 제강슬래그의 부피 팽창율을 0.2%이하로 하여야 인공어초용 재료로 사용할 수 있다는 것을 확인하였고, 이에 대해 보고된 바는 없다. 제강슬래그의 부피팽창율이 0.2%보다 크며는 강도저하가 발생하여 외형이 파손될 우려가 높다.Stabilization means that the steel slag can be used as a material for artificial reefs by reducing the swellability of steelmaking slag below an appropriate limit by curing in advance. It was to digest the free lime component in the slag. Other stabilization methods may be used, and examples thereof include a natural curing method that depends on natural precipitation, a method of using hot water, and a steam curing method. The important thing for curing treatment is to adjust the expansion rate of steelmaking slag below the threshold. According to the research and experiment of the present invention, it was confirmed that the volume expansion ratio of steelmaking slag can be used as the material for artificial reefs, and has not been reported. If the volume expansion ratio of steelmaking slag is greater than 0.2%, there is a high possibility that the appearance may be damaged due to the decrease in strength.
일반 구조물용 콘크리트와는 달리 인공어초는 상부의 하중을 받지 않기 때문에, 자체의 내구성만 확보하면 사용에는 지장이 없는 것으로 판단된다. 일반 구조물용 콘크리트용 골재로 제강슬래그를 사용할 때에는 본 발명에서 사용한 검증 방법이외의 많은 검증 방법을 통해 그 안정성을 규명해야 할 것으로 판단 된다.Unlike concrete for general structures, artificial reefs are not subjected to the load of the upper part, so it is judged that there is no problem in using them if they secure their durability. When using steelmaking slag as concrete aggregate for general structures, it is determined that its stability should be identified through many verification methods other than the verification method used in the present invention.
본 발명에 따라 안정화시킨 제강슬래그(조골재)는 시멘트, 모래(세골재), 물과 혼합하여 생콘크리트(반죽)로 만드는데, 이때 중요한 것은 생콘크리트의 슬럼프가 6~14범위가 되도록 배합비를 조정하는 것이다. 슬럼프는 일정의 반죽의 점도로서 제강슬래그를 사용할 때에는 생콘크리트의 슬럼프를 6~14로 관리할 때 적정강도의 어초를 만들 수 있다. 본 발명에서는 제강슬래그, 모래, 시멘트의 배합비를 한정하지는 않으며, 이들의 슬럼프가 6~14범위에 들도록 배합하면 되는 것이다.Steelmaking slag (coarse aggregate) stabilized according to the present invention is mixed with cement, sand (fine aggregate), water to make raw concrete (dough), the important thing is to adjust the mixing ratio so that the slump of the raw concrete is in the range of 6-14 . Slump is the viscosity of a certain dough. When using steelmaking slag, it is possible to make a base of appropriate strength when managing the slump of fresh concrete at 6-14. In this invention, it does not limit the compounding ratio of steelmaking slag, sand, and cement, What is necessary is just to mix | blend so that these slumps may be in the 6-14 range.
이와 같이 슬럼프가 조정된 생콘크리트는 원하는 형태의 성형체로 만든다.The slump-adjusted fresh concrete is made into shaped bodies of the desired shape.
이하, 본 발명을 실시예를 통하여 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
[실시예 1].[Example 1].
먼저 제강공정에서 발생된 표 1의 제강슬래그를 파쇄 공정을 거치게 하여 한국공업규격 KS F 2544의 방법에 준하여 5-25mm (고로슬래그 굵은 골재 57)을 제조하였다. 이후에 양생장에 방치한 후 살수기를 간헐적으로 작동시켜 표면이 젖은 상태를 유지하도록 하였고, 이후에 1개월씩 경과할 때마다 시료를 채취하여 팽창율을 측정하고, 시멘트 326㎏/㎥, 물 186㎏/㎥, 모래 734㎏/㎥, 제강슬래그 1335㎏/㎥의 배합비로First, the steelmaking slag of Table 1 generated in the steelmaking process was subjected to a crushing process, thereby preparing 5-25mm (blast furnace slag thick aggregate 57) according to the Korean Industrial Standard KS F 2544. Thereafter, the watering device was intermittently operated to leave the surface wetted, and the surface was kept wet. Afterwards, a sample was taken every 1 month and the expansion rate was measured. Cement 326㎏ / ㎥, water 186㎏ / ㎥, sand 734㎏ / ㎥, steelmaking slag 1335㎏ / ㎥
콘크리트 시편(100fx200h㎜)을 만들고, 1개월을 23C의 수중에서 양생하여 시편을 제작하였다. 이것의 내구성 시험은 오토클레이브(autoclave)를 사용하여 고온(200-210℃) 및 고압(19-20기압)의 조건에서 3번 처리하여 외형의 파손이 되지않고, 오토클레이브 처리 전 후의 강도를 측정하여 강도 변화가 5% 이내이면 적합한 내구성을 갖는 것으로 판정하였다. 그 결과 다음과 같은 결과를 얻었다.Concrete specimens (100fx200h㎜) were made, and one month was cured in 23C of water to prepare specimens. Its durability test is carried out three times under the conditions of high temperature (200-210 ℃) and high pressure (19-20 atmospheres) by using an autoclave to measure the strength before and after autoclave treatment. When the change in strength was within 5%, it was determined to have suitable durability. As a result, the following results were obtained.
표 2에 나타난 바와 같이, 제강슬래그의 부피팽창율이 0.2%이내의 경우에는 성형체의 내구성이 양호한 것으로 평가되었다.As shown in Table 2, when the volume expansion rate of steelmaking slag was less than 0.2%, the durability of the molded object was evaluated as favorable.
[실시예 2]Example 2
실시예 1에서 도출된 결과를 토대로 하여 팽창율이 0.2% 이하로 조정된 제강슬래그를 골재로 사용하여 시험용 인공어초를 제작하여 실해역 적용 시험을 실시하였다. 이때, 제조된 생콘크리트의 슬럼프 값은 현장의 거푸집 및 철근 배열 상태를 고려하여 6-14의 범위에 들도록 조정하였다. 해수의 수온이 충분히 하강하여 해조류 부착이 시작되는 11월 경 시설하여 약 5개월간 효과조사를 실한 결과를 표 3에 나타내었다.Based on the results obtained in Example 1, a test artificial reef was manufactured using the steelmaking slag whose expansion ratio was adjusted to 0.2% or less as an aggregate, and a real sea area application test was performed. At this time, the slump value of the prepared concrete was adjusted to fall within the range of 6-14 in consideration of the formwork and rebar arrangement state of the site. Table 3 shows the results of a five-month effect survey of facilities in seawater where the temperature of the seawater dropped sufficiently to begin the algae attachment.
표 3에서 보는 바와 같이, 제강슬래그를 콘크리트 인공어초의 골재로 사용함으로써 기존의 자연골재를 사용한 인공어초보다 자원조성 효과가 우수함을 알 수 있다. 슬래그 인공어초의 해조류 부착 및 생육효과가 좋게 나타난 것은, 철(Fe)이온이 조류의 포자가 착생하고 발아한 후 활발하게 세포가 활동하게 하는 색소단백질 구성요소로서 색소단백질의 흡수에 관계 있다고 보고한 바가 있고, 성육기에 있어서 세포가 광합성에 필요한 전자전달계의 활동과 색소단백질의 형성이 철이온과 관계가 있는 것으로 알려져 있다.As shown in Table 3, by using the steelmaking slag as aggregate of the artificial artificial reefs, it can be seen that the resource composition effect is superior to the artificial reefs using the existing natural aggregates. The algal algae adhesion and growth effect of slag artificial reefs has been reported to be related to the absorption of pigment protein as a pigment protein component that actively activates the cells after the spores of the algae grow and germinate. In addition, it is known that the activity of the electron transport system required for photosynthesis and the formation of pigment proteins in the growth phase are related to iron ions.
상술한 바와 같이, 본 발명에 따르면 제철공정에서 발생하는 제강슬래그를 활용하면서도 자원조성효과가 우수한 인공어초를 제공함으로써 어족자원을 풍족하게 할 수 있는 인공어초 제조원가를 낮출 수 있는 유용한 효과가 있는 것이다.As described above, according to the present invention, by utilizing the steel slag generated in the steelmaking process, by providing an artificial reef with excellent resource composition effect, there is a useful effect of lowering the cost of manufacturing artificial reefs that can enrich fish stocks.
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| KR100693391B1 (en) * | 2006-07-14 | 2007-03-12 | 이행우 | A color concrete composites for structures including basic oxygen furnace slag and blast-furnace slag and a manufacturing method thereof |
| KR100832892B1 (en) * | 2006-12-29 | 2008-05-28 | 이행우 | Seaweed cultivation method using basic oxygen furnace slag |
| KR100903204B1 (en) * | 2008-05-16 | 2009-06-18 | (주)메카해양연구소 | Permeability tetrapod, harbor facility for the manufacturing method |
| KR101381261B1 (en) * | 2012-08-28 | 2014-04-14 | 주식회사 메카 | Method for preparing scs concrete composition |
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| KR100996624B1 (en) | 2009-12-16 | 2010-11-25 | 강행근 | An artifical reef for submarine forest |
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| JPH0753067B2 (en) * | 1993-06-28 | 1995-06-07 | 雅雄 塩谷 | Manufacturing method of artificial fish reef |
| KR100343839B1 (en) * | 1998-06-27 | 2002-08-22 | 주식회사 제철세라믹 | Artificial reef and manufacturing method thereof |
| KR100451821B1 (en) * | 1999-11-12 | 2004-10-08 | 주식회사 포스코 | Improvement Method of Incipient Strength of Concrete Using BF Slag Cement |
| KR100414901B1 (en) * | 2001-02-27 | 2004-01-13 | 주식회사 유로엔지니어링플러스 | A concrete composite using slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100693391B1 (en) * | 2006-07-14 | 2007-03-12 | 이행우 | A color concrete composites for structures including basic oxygen furnace slag and blast-furnace slag and a manufacturing method thereof |
| KR100832892B1 (en) * | 2006-12-29 | 2008-05-28 | 이행우 | Seaweed cultivation method using basic oxygen furnace slag |
| KR100903204B1 (en) * | 2008-05-16 | 2009-06-18 | (주)메카해양연구소 | Permeability tetrapod, harbor facility for the manufacturing method |
| KR101381261B1 (en) * | 2012-08-28 | 2014-04-14 | 주식회사 메카 | Method for preparing scs concrete composition |
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