KR100694267B1 - A marine concrete with steel-making slag aggregate - Google Patents
A marine concrete with steel-making slag aggregate Download PDFInfo
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- KR100694267B1 KR100694267B1 KR1020030096584A KR20030096584A KR100694267B1 KR 100694267 B1 KR100694267 B1 KR 100694267B1 KR 1020030096584 A KR1020030096584 A KR 1020030096584A KR 20030096584 A KR20030096584 A KR 20030096584A KR 100694267 B1 KR100694267 B1 KR 100694267B1
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Classifications
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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
- C04B18/142—Steelmaking slags, converter 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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/021—Agglomerated materials, e.g. artificial aggregates agglomerated by a mineral binder, e.g. cement
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
Abstract
본 발명은 제강슬래그를 골재로 사용하는 해양용 콘크리트에 관한 것이다.The present invention relates to marine concrete using steelmaking slag as aggregate.
본 발명은 제강슬래그 조골재 및 세골재를 단독 또는 혼합으로 사용하고, 포틀란트 시멘트 및 물을 혼합하여 구성되는 콘크리트에 있어서,The present invention uses a steelmaking slag coarse aggregate and fine aggregate alone or in a mixture, and in the concrete constituted by mixing Portland cement and water,
상기 시멘트 첨가량 100중량부에 대하여 4000브레인 이상의 탈규슬래그 미분말 10~15중량부를 추가로 첨가하는 것을 특징으로 한다.10 to 15 parts by weight of fine silica slag fine powder is added to 100 parts by weight of the cement addition amount.
본 발명은 내해수성에 불리한 일반적인 포틀란트 시멘트를 사용하더라도 탈규슬래그 미분말을 혼화재로 사용함에 의하여 내해수성을 향상시킬 수 있을 뿐만 아니라 고가의 고로슬래그 미분말을 대신하여 탈규슬래그 미분말을 혼화재로 사용함에 의하여 제조비용도 절감할 수 있는 효과가 있다.The present invention not only improves seawater resistance by using desulfurized slag fine powder as admixture, but also uses desulfurized slag fine powder as admixture in place of expensive blast furnace slag fine powder, even when using general portland cement which is disadvantageous to seawater resistance. Manufacturing costs can also be reduced.
탈규슬래그, 제강슬래그, 포틀란트 시멘트, 내해수성, 해양용 콘크리트Degreasing slag, steelmaking slag, portland cement, seawater resistance, marine concrete
Description
본 발명은 제강슬래그를 골재로 사용하는 해양용 콘크리트에 관한 것으로, 보다 상세하게는 내해수성에 불리한 일반적인 포틀란트 시멘트를 사용하더라도 탈규슬래그를 첨가함에 의하여 내해수성을 향상시킬 수 있는 제강슬래그를 이용한 해양용 콘크리트에 관한 것이다.The present invention relates to marine concrete using steelmaking slag as aggregate, and more particularly, using steelmaking slag that can improve seawater resistance by adding de-silicone slag even when using general Portland cement, which is disadvantageous to seawater resistance. It relates to marine concrete.
본 발명과 같은 해양용 콘크리트의 경우 내해수성이 매우 중요한 인자이다. 따라서, 내해수성의 향상을 위하여 일반적인 포틀란트 시멘트를 대신하여 슬래그 시멘트를 주로 이용하고 있다. 또한, 해양용 콘크리트의 혼화재로는 고로슬래그 미분말이 주로 사용되는데, 상기 고로슬래그 미분말은 고가이므로 사용상의 제약이 따르게 된다.In the case of marine concrete, such as the present invention seawater resistance is a very important factor. Therefore, in order to improve seawater resistance, slag cement is mainly used instead of general portland cement. In addition, the blast furnace slag fine powder is mainly used as the admixture of marine concrete, the blast furnace slag fine powder is expensive, so the use restrictions.
본 발명은 상기한 종래기술의 문제점을 해결하기 위한 것으로, 내해수성에 불리한 일반적인 포틀란트 시멘트를 사용하더라도 탈규슬래그 미분말을 혼화재로 사용함에 의하여 내해수성을 향상시킬 수 있는 제강슬래그를 이용한 해양용 콘크리트를 제공하는데, 그 목적이 있다.The present invention is to solve the problems of the prior art, marine concrete using steelmaking slag that can improve the seawater resistance by using de-silicone slag fine powder as admixture even when using a general portland cement that is disadvantageous to seawater resistance To provide, the purpose is.
또한, 본 발명은 고가의 고로슬래그 미분말을 대신하여 탈규슬래그 미분말을 혼화재로 사용함에 의하여 제조비용을 절감하는데, 또 다른 목적이 있다.
In addition, the present invention is to reduce the manufacturing cost by using the de-silicone slag fine powder as a mixed material in place of the expensive blast furnace slag fine powder, there is another object.
상기 목적을 달성하기 위한 본 발명은, 제강슬래그 조골재 및 세골재를 단독 또는 혼합으로 사용하고, 포틀란트 시멘트 및 물을 혼합하여 구성되는 콘크리트에 있어서,In the present invention for achieving the above object, in the concrete composed of steel slag coarse aggregate and fine aggregate using alone or mixed, and mixed with Portland cement and water,
상기 시멘트 첨가량 100중량부에 대하여 4000브레인 이상의 탈규슬래그 미분말 10~15중량부를 추가로 첨가하는 것을 특징으로 한다.10 to 15 parts by weight of fine silica slag fine powder is added to 100 parts by weight of the cement addition amount.
이하, 본 발명에 대하여 상세하게 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.
본 발명은 제강슬래그 조골재 및 세골재를 단독 또는 혼합으로 사용하고, 포틀란트 시멘트 및 물을 혼합하여 구성되는 콘크리트의 제조방법에 있어서, 혼화재로써 탈규슬래그 미분말을 추가로 첨가하는 것을 특징으로 한다.The present invention uses steelmaking slag coarse aggregate and fine aggregate alone or in combination, and in the production method of concrete composed by mixing portland cement and water, it is characterized in that the addition of fine fine silica slag powder as a mixed material.
이때, 혼화재로써의 상기 탈규슬래그 미분말의 첨가량이 시멘트 첨가량 100 중량부에 대하여 10중량부 미만이면 내해수성 향상이 미약하고, 15중량부를 초과하면 내해수성 및 강도가 감소하므로, 상기 탈규슬래그 미분말의 첨가량은 시멘트 첨가량 100중량부에 대하여 10~15중량부로 제한하는 것이 바람직하다.At this time, if the addition amount of the finer de-slag slag powder as the admixture is less than 10 parts by weight based on 100 parts by weight of cement, the improvement of seawater resistance is insignificant, and if it exceeds 15 parts by weight, the seawater resistance and strength are reduced. It is preferable to limit it to 10-15 weight part with respect to 100 weight part of silver cement addition amounts.
또한, 상기 탈규슬래그 미분말의 입도는 제한이 없으나, 4000브레인 미만으로 입도를 제어하게 되면 반응성이 떨어지는 문제점이 발생할 수도 있으므로, 상기 탈규슬래그 미분말의 입도는 4000브레인 이상으로 제한하는 것이 보다 바람직하다.In addition, the particle size of the fine silica slag powder is not limited, but if the particle size is controlled to less than 4000 brain, the reactivity may occur, the particle size of the fine silica slag fine powder is more preferably limited to more than 4000 brain.
본 발명에서 탈규슬래그 미분말을 첨가함에 의하여 내해수성이 향상되는 이유는 포틀란트 시멘트 수화시에 발생되는 Ca(OH)2가 탈규슬래그 미분말과 반응하여 C-S-H 화합물을 생성하고, 이 수화물이 콘크리트 내의 공극을 충진하여 모세관 공극이 감소함에 의한 것이다.The reason why seawater resistance is improved by adding de-silicone slag powder in the present invention is that Ca (OH) 2 generated during the hydration of Portland cement reacts with the de-silicone slag powder to produce CSH compounds, and the hydrates are voids in concrete. By filling the capillary voids.
본 발명에 있어서, 상기 제강슬래그의 경우 제강슬래그 내에 함유되어 있는 유리석회의 팽창에 의하여 균열이나 파괴가 일어나는 것을 방지하기 위하여 에이징 공정을 거친 제강슬래그를 사용하는 것이 바람직하다.In the present invention, in the case of the steelmaking slag, it is preferable to use the steelmaking slag that has undergone an aging process in order to prevent cracking or fracture due to expansion of the glass lime contained in the steelmaking slag.
상기 에이징 공정은 제강슬래그내에 함유되어 있는 유리석회를 물과 반응시켜 Ca(OH)2로 안정화시키는 공정이다.The aging step is a step of stabilizing Ca (OH) 2 by reacting the glass lime contained in the steelmaking slag with water.
본 발명에서와 같이, 제강슬래그를 골재로 사용할 경우 미량의 철분이 장기간에 걸쳐 용출되어 나옴으로써, 식물의 생육에 좋은 효과를 나타낸다. 특히, 인공 어초 및 해중림초와 같은 해양생태계 복원용 구조물용으로 사용시 상당한 효과를 볼 수 있다.As in the present invention, when the steelmaking slag is used as aggregate, a small amount of iron is eluted for a long time, thereby showing a good effect on the growth of plants. In particular, significant effects can be seen when used for marine ecosystem restoration structures such as artificial reefs and deforestation.
또한, 제강슬래그는 기존의 천연 쇄석보다 단단하여 좋은 내마모성을 나타내며, 이로 인해 동일 배합의 경우에 자연쇄석을 사용한 콘크리트보다 높은 압축강도를 나타낸다.In addition, steelmaking slag is harder than the existing natural crushed stone shows good wear resistance, and thus exhibits higher compressive strength than concrete using natural crushed stone in the same formulation.
이하, 실시예를 통하여 본 발명을 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.
[실시예]EXAMPLE
제강슬래그 세골재:제강슬래그 조골재=1:1, 물:시멘트=1:1로 하여 콘크리트를 배합하였다. 이때, 시멘트는 포틀란트 시멘트를 사용하였고, 제강슬래그 골재는 에이징 처리를 한 제강슬래그 골재를 사용하였다. 또한, 제강슬래그 골재는 0.15~5mm를 세골재로 사용하였고, 5~25mm를 조골재로 사용하였으며, 탈규슬래그 미분말 첨가량은 하기 표 1과 같다. 이때, 상기 탈규슬래그 미분말의 입도는 4000브레인 이상인 것을 사용하였다.Steelmaking slag fine aggregate: Steelmaking slag coarse aggregate = 1: 1, water: cement = 1: 1 Concrete was mix | blended. At this time, cement was used for Portland cement, and steelmaking slag aggregate was used as steelmaking slag aggregate subjected to aging treatment. In addition, steelmaking slag aggregate was used 0.15 ~ 5mm fine aggregate, 5 ~ 25mm was used as coarse aggregate, the amount of fine silica slag fine powder is added as shown in Table 1. At this time, the particle size of the fine silica slag fine powder was used to more than 4000 brain.
상기와 같이 제조된 시편을 23℃의 항온 수조에서 양생하면서 양생 3일차에 압축강도를 측정하였고, 같은 배합의 시편을 28일간 양생하여 ASTM C 1202-97에 명시된 방법에 의해 염소이온 침투저항성을 측정하였으며, 그 결과는 하기 표 1과 같다.The specimen prepared as described above was cured in a constant temperature bath at 23 ° C., and the compressive strength was measured on the third day of curing. The specimen of the same formulation was cured for 28 days to measure chlorine ion penetration resistance by the method specified in ASTM C 1202-97. The results are shown in Table 1 below.
상기 표 1에서 알 수 있는 바와 같이, 본 발명의 범위를 만족하는 발명재1 및 발명재2의 경우 2000coulomb 이하의 염소이온 침투 저항성을 나타내어 내후성이 매우 우수함을 알 수 있었다.As can be seen from Table 1, the invention material 1 and the invention material 2 satisfying the scope of the present invention showed a resistance to chlorine ion penetration of 2000 coulomb or less, it was found that the weather resistance is very excellent.
그러나, 탈규슬래그 미분말의 첨가량이 본 발명의 범위보다 적은 비교재1의 경우에는 강도는 우수하게 나타났으나, 내해수성이 매우 열위하였다.However, in the case of Comparative Material 1, in which the amount of fine silica slag added was less than the range of the present invention, the strength was excellent, but seawater resistance was inferior.
또한, 탈규슬래그 미분말의 첨가량이 본 발명의 범위보다 많은 비교재2의 경우에는 강도 및 내해수성이 모두 열위함을 알 수 있었다.In addition, it was found that in the case of Comparative Material 2 in which the amount of fine fine silica slag added was larger than the range of the present invention, both strength and seawater resistance were inferior.
상술한 바와 같이, 본 발명에 따르면 내해수성에 불리한 일반적인 포틀란트 시멘트를 사용하더라도 탈규슬래그 미분말을 혼화재로 사용함에 의하여 내해수성을 향상시킬 수 있을 뿐만 아니라 고가의 고로슬래그 미분말을 대신하여 탈규슬래그 미분말을 혼화재로 사용함에 의하여 제조비용도 절감할 수 있는 효과가 있다.As described above, according to the present invention, even if a general portland cement which is detrimental to seawater resistance is used, the desulfurization slag fine powder can be improved in addition to the expensive blast furnace slag fine powder by using the desulfurization slag fine powder as the admixture. By using the admixture there is an effect that can reduce the manufacturing cost.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011040768A2 (en) | 2009-10-01 | 2011-04-07 | 한국철도기술연구원 | Heavy concrete composition using slag by-products |
| US8221541B2 (en) | 2009-10-01 | 2012-07-17 | Korea Railroad Research Institute | Heavy weight concrete composition using slag byproducts |
| KR101372676B1 (en) | 2012-10-10 | 2014-03-12 | 재단법인 포항산업과학연구원 | Concrete composition with iron and steelmaking slag |
| WO2014196682A1 (en) * | 2013-06-04 | 2014-12-11 | 코오롱글로벌 주식회사 | Seawater resistant grout material composition and method for constructing offshore wind turbine structure using same |
| US9435321B2 (en) | 2013-06-04 | 2016-09-06 | Kolon Global Corporation | Seawater resistant grout material composition and method for constructing offshore wind turbine structure using same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050064968A (en) | 2005-06-29 |
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