KR100252690B1 - Soil bonding material for soil concrete and the soil concrete - Google Patents

Soil bonding material for soil concrete and the soil concrete Download PDF

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KR100252690B1
KR100252690B1 KR1019980018245A KR19980018245A KR100252690B1 KR 100252690 B1 KR100252690 B1 KR 100252690B1 KR 1019980018245 A KR1019980018245 A KR 1019980018245A KR 19980018245 A KR19980018245 A KR 19980018245A KR 100252690 B1 KR100252690 B1 KR 100252690B1
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soil
concrete
weight
soil concrete
present
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KR1019980018245A
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KR19980043021A (en
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김남호
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김남호
주식회사지오시스
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06Aluminous cements
    • C04B28/065Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10Lime cements or magnesium oxide cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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 calcium sulfate cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00732Uses not provided for elsewhere in C04B2111/00 for soil stabilisation

Abstract

PURPOSE: Additives using clinker composed of calcium sulfoaluminate-based mineral as a main component and soil concrete containing the additives are provided, which have much improved bending strength and rapidly hardened property compared with a conventional concrete. CONSTITUTION: The additives for soil concrete comprises 10-60wt.% of clinker powder composed of calcium sulfoaluminate-based mineral having more than 60wt.% of 3CaO3Al2O3CaSO4, 5-30wt.% of portland cement, 10-40wt.% of slaked lime or unslaked lime, 5-40wt.% of anhydrous gypsum, 0.1-5.0wt.% of fluosilicate such as K2SiF6, MgSiF6 and NaSiF6, The soil concrete is prepared by mixing as-prepared additives with clay containing water in a ratio of 80-250kg/m¬3, and have 150-450kg/cm¬2 of strength.

Description

토양 콘크리트용 첨가재 및 그 토양 콘크리트Soil concrete additives and their soil concrete

본 발명은 토양 콘크리트용 첨가재 (소일 본드) 및 그 토양 콘크리트에 관한 것으로서, 특히 칼슘설포알루미네이트(calcium sulpho-aluminate)계 광물을 주성분으로 하는 속경성 클링커에 포틀랜드 시멘트, 석회, 석고 및 반응촉진제를 첨가하여 고강도 및 속경특성을 갖는 토양 콘크리트용 첨가재 및 그 토양 콘크리트에 관한 것이다.The present invention relates to an additive for soil concrete (soil bond) and its soil concrete, and in particular, a fast-linking clinker mainly composed of calcium sulpho-aluminate-based minerals for portland cement, lime, gypsum and reaction accelerators. The present invention relates to additives for soil concrete having high strength and fast diameter properties and to soil soil additives.

종래 차·보도를 포장하는 재료의 하나로서 콘크리트가 이용되고 있다. 그러나, 이러한 종래의 콘크리트 제품은 압축강도에 비해 상대적으로 낮은 휨강도 및 휨인성으로 인하여 많은 문제점이 발생한다. 또한, 콘크리트에서는 인체에 유해한 가스가 지속적으로 방출되며, 폐콘크리트 포장폐기물은 자연 회귀가 거의 불가능하여 폐기물처리 비용이 많이 소요되고, 시멘트 콘크리트층은 지구의 자기가 전혀 통과하지 않는 등 반환경적 요소로 인하여 인간에게 유해한 환경을 제공하고 있는 실정이다. 또한 차·보도에 적용시 포장하부의 지하수감소에 따른 지반침하현상이 발생되며, 일광의 난반사에 따른 운전자의 피로와 시야저해에 따른 안전사고의 위험이 상존하고 있다.Conventionally, concrete is used as one of the materials for paving cars and sidewalks. However, these conventional concrete products have many problems due to the relatively low flexural strength and flexural toughness compared to the compressive strength. In addition, concrete continuously emits harmful gases to the human body, and waste concrete pavement waste is almost impossible to return to nature, which leads to high waste disposal costs, and the cement concrete layer does not pass through the earth's magnetism at all. It is a situation that provides a harmful environment for humans. Also, when applied to cars and sidewalks, ground subsidence occurs due to the decrease of groundwater under the pavement, and there is a risk of safety accidents due to driver fatigue and blurred vision due to diffused daylight.

이러한 콘크리트 포장재의 대안으로서 고화재를 토양과 혼합하여 일정수준(10 kgf/cm2) 이상의 일축압축강도를 얻는 방법이 제안되었으며, 이러한 종래의 고화재로서 시멘트석회계나 흡수성 고분자계 등의 고화재가 사용되고 있다. 그러나 이러한 종래의 고화재는 칼슘이온의 응집현상, 수화반응 및 장기 재령에서 강도 발현이 작고, 특히 고함수비의 토양에서는 고화재가 흡수하여 결합할 수 있는 물의 양이 작기 때문에 그 효과가 급격히 감소하는 문제점이 있다. 또한, 흡수성 고분자에 의한 고화는 물의 침투에 의해 지반의 연약화가 심하고 강도 발현에는 큰 역할을 할 수 없는 단점을 가지고 있어서 고강도나 속경특성을 필요로 하는 토양을 이용한 도로 포장 등에는 사용할 수 없는 문제점이 있었다.As an alternative to the concrete pavement, a method of obtaining a uniaxial compressive strength of a predetermined level (10 kgf / cm 2 ) by mixing solidified materials with soil has been proposed. As such conventional solidified materials, solidified materials such as cement lime and absorbent polymers have been proposed. Is being used. However, these conventional solidified materials have low strength in the aggregation of calcium ions, hydration reactions, and long-term age, and the effect of the solidified materials is rapidly decreased because of the small amount of water that the solidified material can absorb and bind to, especially in high water content soils. There is a problem. In addition, the solidification by the absorbent polymer has the disadvantage of severe ground weakness due to the penetration of water and can not play a significant role in the development of strength, so it can not be used for road pavement using soil that requires high strength or fast diameter properties there was.

본 발명은 상기한 종래의 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 목적은 도로 포장용으로 이용될 수 있는 강도 및 속경특성을 갖는 토양 콘크리트용 첨가재 및 그 토양 콘크리트를 제공하는 것이다.The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention to provide an additive for soil concrete and its soil concrete having strength and fast diameter properties that can be used for road pavement.

본 발명의 다른 목적은 환경친화적이고 인간에게 이로운 토양 콘크리트용 첨가재 및 그 토양 콘크리트를 제공하는 것이다.Another object of the present invention is to provide an environmentally friendly and human-friendly additive for soil concrete and the soil concrete.

도1은 본 발명에 따른 토양 콘크리트용 첨가재를 사용한 토양 콘크리트의 강도 발현 메카니즘을 도시한 그래프도이고,1 is a graph showing the strength expression mechanism of soil concrete using the additive for soil concrete according to the present invention,

도2는 종래의 고화재를 사용한 토양 콘크리트의 강도 발현 메카니즘을 도시한 그래프도이다.2 is a graph showing the strength expression mechanism of the soil concrete using a conventional solidified material.

상기한 목적을 달성하기 위하여, 본 발명에 따른 토양 콘크리트용 첨가재(소일 본드)는 칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10 내지 60 중량%, 포틀랜드 시멘트 5 내지 30 중량%, 생석회 또는 소석회 10 내지 40 중량%, 천연무수석고 5-40 중량%, 규불화염 0.1 내지 5 중량%로 구성되는 것을 특징으로 한다.In order to achieve the above object, the additive for soil concrete according to the present invention (soil bond) is 10 to 60% by weight of clinker powder based on calcium sulfoaluminate-based mineral, 5 to 30% by weight of Portland cement, quicklime or slaked lime It is characterized by consisting of 10 to 40% by weight, 5-40% by weight of natural anhydrous gypsum, 0.1 to 5% by weight of a siliceous salt.

본 발명에 따른 토양 콘크리트는 소정의 수분을 함유한 사질토 또는 점성토와; 상기 사질토 또는 점성토에 배합수와 함께 균질하게 혼합되며, 칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10 내지 60 중량%, 포틀랜드 시멘트 5 내지 30 중량%, 생석회 또는 소석회 10 내지 40 중량%, 천연무수석고 5-40 중량%, 규불화염 0.1 내지 5 중량%로 구성되는 첨가재를 포함하는 것을 특징으로 한다.Soil concrete according to the present invention comprises a sandy soil or viscous soil containing a predetermined moisture; 10 to 60% by weight of clinker powder, which is mixed homogeneously with sandy water or viscous earth, with calcium sulfoaluminate-based mineral, 5 to 30% by weight of Portland cement, 10 to 40% by weight of quicklime or slaked lime, natural It is characterized in that it comprises an additive consisting of 5-40% by weight of anhydrous gypsum, 0.1 to 5% by weight of a siliceous salt.

이하, 본 발명에 따른 첨부도면을 참조하여 토양 콘크리트용 첨가재 및 토양 콘크리트의 바람직한 실시예를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings in accordance with the present invention will be described in detail a preferred embodiment of the soil concrete additives and soil concrete.

본 발명에 따른 토양 콘크리트용 첨가재는 칼슘설포알루미네이트계 광물, 포틀랜드 시멘트, 생석회 또는 소석회, 천연무수석고, 규불화염으로 구성되는 바, 각각의 구성 성분의 특성 및 작용은 다음과 같다.Soil concrete additive according to the present invention is composed of calcium sulfoaluminate-based minerals, portland cement, quicklime or slaked lime, natural anhydrous gypsum, silica fluoride, the characteristics and actions of each component are as follows.

본 발명에 따른 칼슘설포알루미네이트계 광물은 3CaO3Al2O3CaSO4성분을 60중량% 이상을 함유하는 클링커이다. 이 칼슘설포알루미네이트계 광물은 수화 시에 포틀랜드 시멘트, 생석회 또는 소석회 및 무수석고와 반응함으로써 에트링자이트 또는 모노설페이트를 형성하여 본 발명의 토양 콘크리트용 첨가재가 속경성을 갖게 한다. 이 수화물은 결합수가 많고, 고강도 특성을 가지며, 유기물의 존재하에서도 생성되는 특성을 갖기 때문에 본 발명에 특히 적합하다. 칼슘설포알루미네이트계 광물의 분말 입도는 블레인 비표면적으로 3,000-6,000cm2/g이 가능하며, 4,000±500 cm2/g이 가장 바람직하다. 이러한 블레인 비표면적은 초기의 반응속도에 영향을 미치는 요소로서, 비표면적이 높을수록 빠른 반응속도를 나타낸다.The calcium sulfoaluminate mineral according to the present invention is a clinker containing at least 60% by weight of 3CaO3Al 2 O 3 CaSO 4 component. The calcium sulfoaluminate-based mineral reacts with portland cement, quicklime or slaked lime and anhydrous gypsum during hydration to form ettringite or monosulfate, thereby making the additive for soil concrete of the present invention quick-drying. This hydrate is particularly suitable for the present invention because it has a large number of bonds, has high strength properties, and has properties that are produced even in the presence of organic matter. Calcium sulfo aluminate powder, grain size of the carbonate-based mineral is capable of 3,000-6,000cm 2 / g in Blaine specific surface area, and most preferably 4,000 ± 500 cm 2 / g. Such a specific surface area of the blain affects the initial reaction rate. The higher the specific surface area, the faster the reaction rate.

본 발명에 사용되는 천연무수석고는 반수석고나 이수석고와 비교하여 용해속도가 느리기 때문에 칼슘설포알루미네이트계 광물과의 반응성에 적합하고, 고강도 및 고화된 토양체의 안정성에 기여한다. 이 천연무수석고는 칼슘설포알루미네이트계 광물, 생석회 또는 소석회와 반응하여 에트링자이트를 형성하는 바, 그 배합량은 칼슘설포알루미네이트계 광물, 생석회 또는 소석회의 양에 의해서 결정되며, 바람직하게는 칼슘설포알루미네이트계 광물/무수석고의 중량비가 1 이상 3이하로 하며, 2.5 ± 0.1 가장 좋다. 이 칼슘설포알루미네이트계 광물/무수석고의 비는 장기 재령에서의 안정성(치수안정성) 및 내구성에 영향을 미치며, 고강도를 발현하는데 큰 기여를 한다. 본 발명에 따른 토양 콘크리트용 첨가재에 사용되는 천연무수석고는 II형 무수석고이며, 분말도는 블레인 비표면적으로 3,000-8,000cm2/g이다.Natural anhydrous gypsum used in the present invention is suitable for reactivity with calcium sulfoaluminate minerals because of its slow dissolution rate compared to hemihydrate gypsum and dihydrate gypsum, and contributes to the stability of high strength and solidified soil bodies. The natural anhydrous gypsum reacts with calcium sulfoaluminate mineral, quicklime or hydrated lime to form ettringite, and the amount thereof is determined by the amount of calcium sulfoaluminate mineral, quicklime or hydrated lime, preferably The weight ratio of calcium sulfoaluminate mineral / anhydrite gypsum is 1 or more and 3 or less, and 2.5 ± 0.1 is best. This ratio of calcium sulfoaluminate mineral / anhydrite has an effect on stability (dimension stability) and durability at long-term age and contributes to the development of high strength. Natural anhydrous gypsum used in the additive for soil concrete according to the present invention is type II anhydrous gypsum, the powder degree is 3,000-8,000cm 2 / g of the specific surface area of the brain.

생석회 또는 소석회는 포졸란 반응에 의해 수화물을 생성하여 강도 발현에 기여할 뿐만 아니라, 생석회는 초기에 반응하여 발열하며, 수산화칼슘을 형성함으로써 토양의 함수비를 저감시켜 초기 강도 확보와 함께 건조 수축에 의한 균열방지에 도움을 주는 구성요소이므로, 소석회 보다는 생석회를 사용하는 것이 보다 유리하다.Quicklime or hydrated lime not only contributes to strength development by generating hydrates by pozzolanic reactions, but quicklime reacts and generates heat and forms calcium hydroxide to reduce the water content of the soil, thereby securing initial strength and preventing cracking by dry shrinkage. Since it is a helpful component, it is more advantageous to use quicklime than slaked lime.

규불화염은 칼슘설포알루미네이트계 광물과의 수화반응을 경화가 되는 시점이후에서부터 촉진시키고 또한 토양으로부터 장기적으로 용출되는 실리카(SiO2), 알루미나(Al2O3) 성분의 용출 속도를 촉진시킴으로써 포졸란 반응을 앞당기게 하여, 특히 초기 재령에서의 고강도에 기여한다. 본 발명의 토양 콘크리트용 첨가재의 규불화염은 K2SiF6, MgSiF6, NaSiF6를 사용할 수 있으며, 이 중 K2SiF6의 효과가 가장 현저하다.Silica fluoride promotes hydration reaction with calcium sulfoaluminate minerals from the time of hardening and accelerates the dissolution rate of silica (SiO 2 ) and alumina (Al 2 O 3 ) components that are eluted from the soil for a long time. It accelerates the reaction and contributes particularly to high strength at early age. As the silicide salt of the additive for soil concrete of the present invention, K 2 SiF 6 , MgSiF 6 , NaSiF 6 may be used, and among these, K 2 SiF 6 has the most significant effect.

이상과 같은 특성을 갖는 본 발명의 토양 콘크리트용 첨가재의 성분의 구성비는 칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10 내지 60 중량%, 포틀랜드 시멘트 5 내지 30 중량%, 생석회 또는 소석회 10 내지 40 중량%, 천연무수석고 5-40 중량%, 규불화염 0.1 내지 5.0 중량%이 바람직하다.The composition ratio of the components of the additive for soil concrete of the present invention having the above characteristics is 10 to 60% by weight of clinker powder based on calcium sulfoaluminate mineral, 5 to 30% by weight of Portland cement, 10 to 40 of quicklime or slaked lime. By weight, natural anhydrite 5-40% by weight, and 0.1 to 5.0% by weight of silicide salts are preferred.

상기한 구성성분을 갖는 본 발명의 토양 콘크리트용 첨가재에서 발생되는 특징적인 반응은 다음과 같다.Characteristic reactions occurring in the soil concrete additive of the present invention having the above components are as follows.

① 에트링자이트 생성① Ettlingite creation

에트링자이트는 다량의 수분을 결합수로 가지고 있기 때문에 물비를 저하시켜 토양입자의 이동을 구속하고 결합이 가능한 상태로 만든다. 본 발명의 첨가재에서는 규불화염을 포함하고 있기 때문에 다량의 에트링자이트의 생성이 촉진된다.Ettlingite has a large amount of water as the binding water, thereby lowering the water ratio to constrain the movement of soil particles and make it possible to bond. Since the additive material of the present invention contains a silofluoride salt, the production of a large amount of etringite is promoted.

② 포졸란 반응② pozzolanic reaction

규불화염의 첨가는 에트링자이트의 생성을 촉진시킬 뿐만 아니라 토양과의 포졸란 반응을 앞당겨, 속경화·고강도화가 가능하게 된다.The addition of siliceous salts not only promotes the production of ettringite, but also accelerates the pozzolanic reaction with the soil, allowing rapid curing and high strength.

③ 토양입자의 응집③ aggregation of soil particles

포틀랜드 시멘트, 생석회 또는 소석회로부터 용출된 초기의 다량의 칼슘이온은 토양입자를 응집시킨다.Initially large amounts of calcium ions eluted from Portland cement, quicklime, or slaked lime aggregate soil particles.

다음으로 본 발명에 따른 토양 콘크리트용 첨가재를 사용한 토양 콘크리트의 구성 및 작용을 설명한다.Next, the configuration and action of the soil concrete using the additive for soil concrete according to the present invention.

본 발명에 따른 토양 콘크리트용 첨가재는 흙에 배합수와 함께 혼합되어 토양 콘크리트를 구성하게 된다.The additive for soil concrete according to the present invention is mixed with the compounding water in the soil to constitute the soil concrete.

본 발명의 첨가재의 사용량은 고화 대상 토양의 특성, 고화처리 후의 요구 강도 등에 따라서 결정되지만, 일반적으로 처리 토양 1m3당 80-250kg이 적당하다.The amount of the additive of the present invention is determined depending on the request destination after the solidification characteristics of the soil, solidifying process intensity, typically a soil treatment 80-250kg per 1m 3 is suitable to.

본 발명의 첨가재를 첨가, 혼합하는 방법은 특별한 제한이 없지만 각 성분을 미리 혼합하여 대상 토양에 첨가 혼합하는 일반적인 방법이 사용되며 균질하게 혼합되어야 한다.The method of adding and mixing the additives of the present invention is not particularly limited, but a general method of mixing and mixing each component in advance and adding to the target soil is used and should be mixed homogeneously.

본 발명에 따른 토양 콘크리트용 첨가재를 사용할 경우 처리 대상 토양의 유동성, 산모래 재생율을 동시에 향상시키기 위한 목적으로 고성능 감수제, 유동화제등을 병용할 수 있다.When the additive for soil concrete according to the present invention is used, a high performance water reducing agent, a fluidizing agent, etc. may be used in combination for the purpose of simultaneously improving the fluidity of the soil to be treated and acid sand regeneration rate.

본 발명의 토양 콘크리트의 주원료인 흙은 조립토(組粒土)계열이 유리하고, 이 중에서도 특히 모래 및 모래진흙 계열이 특히 우수한 특성을 나타내며, 이러한 흙은 주변에서 비교적 용이하게 채취할 수 있는 재료이다. 그러나 유기토양이나 반응성을 가진 토양은 본 발명에 따른 토양 콘크리트용 첨가재의 특성에 적합하지 않으므로 배제된다. 토양입자의 크기는 일반적인 토양의 경우 No. 200체를 통과한 양이 5-35% 내외의 범위가 적합하다. 굵은 골재는 사용되지 않으나, 현장여건상 굵은 골재가 일부 사용될 경우 최대 골재 치수는 5mm이하로 제한되어야 하며, No. 4체를 통과하는 양이 55% 내외인 것이 성능발현에 가장 유리하다. 굵은 골재를 제외한 본 발명에 따른 토양 콘크리트용 첨가재의 최대 입자치수는 4mm를 넘어서는 안된다.Soil, which is the main raw material of the soil concrete of the present invention, is advantageous in granulated soil series, among which sand and sand mud series show particularly excellent characteristics, and such soil is a material that can be easily collected from the surroundings. . However, soil having organic soil or reactivity is excluded because it is not suitable for the characteristics of the additive for soil concrete according to the present invention. The size of soil particles is no. The amount which passed 200 sieves is suitable for the range of 5-35%. Coarse aggregates are not used. However, if some coarse aggregates are used in the field, the maximum aggregate size should be limited to 5 mm or less. It is most advantageous for the performance expression that the amount passing through the four bodies is about 55%. The maximum particle size of the additive for soil concrete according to the present invention, excluding coarse aggregate, should not exceed 4 mm.

배합수는 기름, 산, 유기물 등 이물질이 혼입되어 콘크리트의 품질에 영향을 주어서는 안되며, 일반적으로 음용수로 사용가능한 수질이 바람직하다.Mixing water should not affect the quality of concrete due to the mixing of foreign substances such as oil, acid, organic matter, etc. Generally, water quality that can be used as drinking water is preferable.

본 발명에 따른 토양 콘크리트용 첨가재의 강도발현 메카니즘은 토양자체의 개량효과, 첨가물에 기인한 수화반응, 토양에서 가용되는 성분과 첨가물의 반응의 3단계로 분류되는 바, 토양 콘크리트용 첨가재를 사용한 토양 콘크리트의 강도발현 메카니즘을 살펴본다.The strength expression mechanism of the additive for soil concrete according to the present invention is classified into three stages: the improvement effect of the soil itself, the hydration reaction caused by the additive, and the reaction of the components and additives available in the soil. Investigate the strength development mechanism of concrete.

도1은 본 발명에 따른 토양 콘크리트용 첨가재를 사용한 토양 콘크리트의 강도 발현 메카니즘을 도시한 그래프도이고, 도2는 종래의 고화재를 사용한 토양 콘크리트의 강도 발현 메카니즘을 도시한 그래프도로서, 도시된 바와 같이 종래의 고화재를 혼입하여 토양강도를 증진시키는 공법은 흙에 대한 물성개량과 포졸란 반응에 의한 경화가 전부여서 충분한 강도를 얻을 수 없는 반면, 본 발명의 토양 콘크리트용 첨가재를 첨가하면 이러한 종래의 강도증진 메카니즘에 더하여 함수비 저하, 이온교환 중단, 소성지수 저감, 수환물 생성경화, 에크링자이트 생성(토양의 네트워킹), 토양입자 구속 등 각종 화학적, 물리적 반응을 통해 획기적인 강도증진을 달성할 수 있게 된다.1 is a graph showing the strength expression mechanism of the soil concrete using the additive for soil concrete according to the present invention, Figure 2 is a graph showing the strength expression mechanism of soil concrete using a conventional solidified material, As described above, the method of improving the soil strength by incorporating the conventional fire extinguishing agent is a property improvement of the soil and hardening by the pozzolanic reaction, so that sufficient strength cannot be obtained. In addition to the strength enhancing mechanism, the company can achieve breakthrough strength through various chemical and physical reactions such as lowering water content, stopping ion exchange, reducing plasticity index, hardening hydrate formation, creating ecringite (soil networking), and confining soil particles. It becomes possible.

다음으로 본 발명에 따른 토양 콘크리트의 시공방법을 설명한다.Next, the construction method of the soil concrete according to the present invention.

본 발명의 토양 콘크리트는 자연상태의 노상 위에 표층으로서 시공되거나, 보조기층이 필요한 경우 노상 위에 보조기층을 시공하고 그 위에 본 발명에 따른 토양 콘크리트를 시공한다. 노상이란 포장의 두께를 결정하는 기초가 되는 흙의 구분으로 통상 포장 및 약 1m의 층을 말하며, 보조기층이란 자연상태를 최대한 보장하기 위하여 안정처리된 흙의 층으로서, 균등하고 영구적인 지지력을 제공하여야 하고, 노상반력계수를 증대시켜야 하며 동결융해에 대한 손상도 극소화되어야 한다. 노상면과 보조기층은 일반적인 공사와 동일하며, 토양 콘크리트는 인력 또는 휘니셔로 포설하고 포설전 기층면에 적정량의 물을 살포하여 표층과의 분리형상이 생기지 않도록 한다. 사질토의 재료일 경우 혼화제를 스프레이식으로 살포하여도 되나 점성토일 경우 균질한 혼합을 위하여 믹서를 사용한다. 토양의 적정 수분량은 12% 내외가 바람직하다.The soil concrete of the present invention is constructed as a surface layer on a natural roadbed, or when an auxiliary base layer is required, the auxiliary concrete layer is constructed on the roadbed and the soil concrete according to the present invention is constructed thereon. The roadbed is a layer of soil that is the basis for determining the thickness of the pavement. It is usually a pavement and a layer of about 1 m. The subbase is a layer of soil that is stabilized to ensure the natural state as much as possible, and provides even and permanent support. The road reaction coefficient should be increased, and damage to freezing and thawing should be minimized. The roadbed surface and subbase are the same as general construction. Soil concrete is laid by manpower or finisher and sprayed with appropriate amount of water on the base layer before laying so as to prevent separation from surface layer. In the case of sandy soil materials, admixtures may be sprayed in a spray method. In the case of viscous soils, a mixer is used for homogeneous mixing. The soil moisture is preferably about 12%.

다음으로 본 발명에 따른 토양 콘크리트용 첨가재의 바람직한 실시예를 설명한다.Next, a preferred embodiment of the additive for soil concrete according to the present invention will be described.

본 발명의 바람직한 실시예의 토양 콘크리트용 첨가재의 배합비는 다음의 표1과 같다.The mixing ratio of the additive for soil concrete of a preferred embodiment of the present invention is shown in Table 1 below.

본 발명의 토양 콘크리트의 바람직한 실시예에서 대상 토양은 28%의 함수비를 가진 사질토와 48%의 함수비를 가진 점성토를 사용한다.In a preferred embodiment of the soil concrete of the present invention, the target soil uses sandy soil having a water content of 28% and viscous soil having a water content of 48%.

본 발명에 따른 토양 콘크리트용 첨가재의 성능을 비교하기 위하여 비교예1에서는 첨가재로서 포클랜드 시멘트를 단독으로 사용하고, 비교예2에서는 첨가재로서 흡수성 고분자계 고화재를 사용한다. 본 발명의 토양 콘크리트에서 대상토양 1m3당 사용되는 첨가재의 첨가량은 다음의 표2와 같다.In order to compare the performance of the additive for soil concrete according to the present invention, in Comparative Example 1, Falkland cement is used alone, and in Comparative Example 2, an absorbent polymer solidifying material is used as the additive. In the soil concrete of the present invention, the amount of the additive used per 1 m 3 of the target soil is shown in Table 2 below.

본 발명에 따른 토양 콘크리트의 제1,2실시예 및 비교예의 강도측정을 위하여 상기한 첨가량에 따른 첨가재와 대상 토양을 혼합기를 이용하여 혼합한 다음 일정 형상을 갖는 틀에 투입하여 공시체를 제작하고, 상대 습도 95%, 온도 23℃의 양생조건에서 양생을 행한다. 1일 측정을 제외하고는 측정일 1일 전에 물에 침지한 후 꺼내어 표면의 물기를 제거하고 일축압축강도를 측정한 결과가 아래의 표3과 같다.In order to measure the strength of the first and second embodiments and comparative examples of the soil concrete according to the present invention, the additives and the target soil according to the above-mentioned amounts were mixed by using a mixer and then put into a mold having a certain shape to prepare specimens. Curing is performed under curing conditions at a relative humidity of 95% and a temperature of 23 ° C. Except for the 1st day measurement, the result of immersion in water 1 day before the measurement day is taken out to remove water on the surface and the uniaxial compressive strength is shown in Table 3 below.

다음으로 상기한 구성의 본 발명의 토양 콘크리트용 첨가재 및 그 토양 콘크리트의 효과를 설명한다.Next, the effect of the soil concrete additive and the soil concrete of the present invention described above.

1. 본 발명에 따른 토양 콘크리트용 첨가재는 광범위한 토양에 적용할 수 있으며, 특히 고함수의 토양에도 적용가능하다.1. The additive for soil concrete according to the present invention can be applied to a wide range of soils, and is particularly applicable to soils with high water content.

2. 본 발명에 따른 토양 콘크리트는 초기 재령에 있어서 속경화하며, 150-450kg/cm2의 고강도를 얻을 수 있다.2. Soil concrete according to the present invention is fast curing in the early age, can achieve a high strength of 150-450kg / cm 2 .

3. 첨가재를 적게 사용하여도 안정적인 고강도를 얻을 수 있다.3. Stable high strength can be obtained even if less additives are used.

4. 본 발명에 따른 토양 콘크리트용 첨가재를 사용한 토양 콘크리트는 기존 콘크리트의 최재 단점인 취성, 즉 압축강도에 비해 휨강도, 휨인성을 대폭 증진시킬 수 있다.4. Soil concrete using additives for soil concrete according to the present invention can greatly improve the flexural strength and flexural toughness compared to the brittleness, that is, the compressive strength of the existing concrete.

5. 동결융해 저항성이 탁월하므로 장기공용성 측면에서 유리하다.5. Excellent freeze-thawing resistance is advantageous in terms of long-term common compatibility.

6. 전 단면에 걸쳐 동일한 색상을 띄므로 표면마모에 따른 색바램 현상이 발생되지 않는다. 또한 자연색에 가까운 노면 상태를 유지하므로 일광의 난반사에 따른 시야저해 등의 문제가 발생하지 않는다.6. Since the same color is shown in all sections, color fading does not occur due to surface wear. In addition, since the road surface is maintained close to the natural color, problems such as a loss of view due to diffused reflection of daylight do not occur.

7. 환경친화적, 자연친화적인 특성을 나타내며 시공될 경우 인체에 유익한 원적외선을 방출하여 보행자의 건강을 증진시키며, 폐기시 장기간이 경과하면 풍화과정 등을 통해 자연상태로 회귀가 가능하여 폐기물 처리비용이 절감된다.7. It shows environment-friendly and nature-friendly characteristics, and when constructed, it emits far-infrared rays, which is beneficial to the human body, and promotes the health of pedestrians. Savings.

8. 차,보도 적용시 포장하부의 지하수 감소에 따른 지반침하 현상을 억제하여 보생시 물고임이나 미끄러짐을 방지하는 효과를 발휘한다.8. It suppresses ground subsidence due to the decrease of groundwater under the pavement when it is applied to cars and sidewalks.

9. 동절기 표면동결현상이 상대적으로 저감되어 공용수명 증진효과를 가지며, 하절기에는 아스팔트나 콘크리트와 달리 열의 흡수나 전도특성이 상대적으로 낮아서 도로손상에 의한 주행성 악화가 크게 저감된다.9. The surface freezing phenomenon is relatively reduced in winter, and it has the effect of improving the service life. In the summer, unlike asphalt and concrete, heat absorption and conduction characteristics are relatively low, and the deterioration of road performance due to road damage is greatly reduced.

Claims (2)

칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10 내지 60 중량%, 포틀랜드 시멘트 5 내지 30 중량%, 생석회 또는 소석회 10 내지 40 중량%, 천연무수석고 5-40 중량%, 규불화염 0.1 내지 5.0 중량%로 구성되는 토양 콘크리트용 첨가재.10 to 60% by weight of clinker powder based on calcium sulfoaluminate minerals, 5 to 30% by weight of Portland cement, 10 to 40% by weight of quicklime or slaked lime, 5-40% by weight of natural anhydrite, and 0.1 to 5.0% by weight of silicide Additives for soil concrete composed of%. 소정의 수분을 함유한 사질토 또는 점성토와;Sandy soil or viscous soil containing a predetermined moisture; 상기 사질토 또는 점성토에 배합수와 함께 균질하게 혼합되며, 칼슘설포알루미네이트계 광물을 주성분으로 하는 클링커 분말 10 내지 60 중량%, 포틀랜드 시멘트 5 내지 30 중량%, 생석회 또는 소석회 10 내지 40 중량%, 천연무수석고 5 내지 40 중량%, 규불화염 0.1 내지 5 중량%로 구성되는 첨가재를 포함하는 것을 특징으로 하는 토양 콘크리트.10 to 60% by weight of clinker powder, which is mixed homogeneously with sandy water or viscous earth, with calcium sulfoaluminate-based mineral, 5 to 30% by weight of Portland cement, 10 to 40% by weight of quicklime or slaked lime, natural Soil concrete, characterized in that it comprises an additive consisting of 5 to 40% by weight of anhydrous gypsum, 0.1 to 5% by weight of a siliceous salt.
KR1019980018245A 1998-05-20 1998-05-20 Soil bonding material for soil concrete and the soil concrete KR100252690B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100385815B1 (en) * 2000-04-21 2003-06-02 이득한 CSA system water proofing materials for anti-caustic concrete
KR100880932B1 (en) 2008-07-22 2009-02-04 최이현 Producing method for ultra rapid hardening polymer modified concrete
KR100880930B1 (en) 2008-07-22 2009-02-04 최이현 Cement composition for rapid hardening
KR101457599B1 (en) * 2013-12-13 2014-11-10 주식회사 한국건설기술공사 Artificial reefs of yellow soil and manufacturing method of the same

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KR100654403B1 (en) * 2005-03-12 2006-12-05 지오콘머테리얼 주식회사 asphalt-concrete grout material with rapid-hardening and semi-rigid
KR100581227B1 (en) * 2005-12-23 2006-05-18 김민우 Soil hardening chemical composition
KR100938936B1 (en) * 2009-07-15 2010-01-27 (유)한국기계 Cement composition for soil concrete, soil concrete including the same and pavement method of soil concrete using the same
KR100968937B1 (en) * 2010-02-05 2010-07-14 (주)오에치케이 Soil firming agent

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100385815B1 (en) * 2000-04-21 2003-06-02 이득한 CSA system water proofing materials for anti-caustic concrete
KR100880932B1 (en) 2008-07-22 2009-02-04 최이현 Producing method for ultra rapid hardening polymer modified concrete
KR100880930B1 (en) 2008-07-22 2009-02-04 최이현 Cement composition for rapid hardening
KR101457599B1 (en) * 2013-12-13 2014-11-10 주식회사 한국건설기술공사 Artificial reefs of yellow soil and manufacturing method of the same

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