KR101787374B1 - Self Leveling Mortar Compound Having High Abrasion resistance - Google Patents
Self Leveling Mortar Compound Having High Abrasion resistance Download PDFInfo
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
- C04B14/28—Carbonates of calcium
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/143—Calcium-sulfate
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
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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
- C04B28/06—Aluminous 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/50—Defoamers, air detrainers
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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
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
본 발명은 시멘트 기반의 모르타르 조성물에 관한 것으로서, 잔골재 및 채움재로 적용되는 규사의 일부를 풍쇄슬래그로 치환 적용하여 강도 및 내마모성을 향상시킨 자기수평(Self Leveling) 모르타르 조성물에 관한 것이다.
본 발명은 「1종보통포틀랜드시멘트 7~17중량부, A12O3가 30~40wt% 함유된 알루미나시멘트 10~25중량부, 무수석고 7~20중량부, 분말도 2,300~2,800㎠/g인 석회석 미분말 20~30중량부, 규사 40~80wt% 풍쇄슬래그 20~60wt%로 조성된 혼합골재 20~40중량부 및 유동화제 0.05~0.30중량부를 포함하는 SL 혼합물 100중량부를 기준으로 배합수가 20~30중량부 혼합된 조성된 자기수평 모르타르 조성물」을 제공한다.The present invention relates to a mortar composition based on cement, and relates to a self leveling mortar composition improved in strength and abrasion resistance by replacing part of silica sand applied as fine aggregate and filler with crumbly slag.
The present invention relates to a cement paste composition comprising 7 to 17 parts by weight of one kind of ordinary Portland cement, 10 to 25 parts by weight of alumina cement containing 30 to 40 wt% of Al 2 O 3 , 7 to 20 parts by weight of anhydrous gypsum, 20 to 30 parts by weight of limestone fine powder, 20 to 40 parts by weight of a mixed aggregate composed of 40 to 80% by weight of crushed slag 20 to 60% by weight, and 0.05 to 0.30 part by weight of a fluidizing agent, based on 100 parts by weight of the SL mixture ≪ / RTI > to 30 parts by weight of a mixed self-leveling mortar composition.
Description
본 발명은 시멘트 기반의 모르타르 조성물에 관한 것으로서, 잔골재 및 채움재로 적용되는 규사의 일부를 풍쇄슬래그로 치환 적용하여 강도 및 내마모성을 향상시킨 자기수평(Self Leveling) 모르타르 조성물에 관한 것이다.
The present invention relates to a mortar composition based on cement, and relates to a self leveling mortar composition improved in strength and abrasion resistance by replacing part of silica sand applied as fine aggregate and filler with crumbly slag.
종래의 시멘트 기반의 SL(Self Leveling)재는 마모저항성이 일반 콘크리트 바닥보다는 높으나 EN13813 규격(2002)의 AR3 등급 수준에 머무르고 있어 마모에 의한 하자 발생량 및 하자 발생 빈도가 높다. 아래의 [표 1]은 EN13813 규격의 마모저항성 등급 기준을 정리한 것이다.Conventional cement-based SL (Self Leveling) material has higher abrasion resistance than ordinary concrete floor but remains at AR3 level of EN13813 standard (2002). [Table 1] summarizes the abrasion resistance rating standards of EN13813.
우레탄, 에폭시 계열의 SL재는 AR1 등급 이상의 마모저항성이 발현되나, 고가의 비용으로 인해 대면적의 공장 등에 사용하기에는 경제성이 좋지 않다. 또한, 우레탄, 에폭시 계열의 SL재의 건조수축 길이변화율은 시멘트 모르타르보다 작기는 하나 시공 후 건조수축에 의한 균열 문제가 상존한다.
Urethane and epoxy-based SL materials exhibit abrasion resistance higher than AR1 grade, but they are not economical to use for large-scale factories due to high cost. In addition, the rate of change of shrinkage length of urethane and epoxy-based SL materials is smaller than that of cement mortar, but there is a cracking problem due to drying shrinkage after application.
본 발명은 정밀한 바닥 마감을 요구하는 반도체 공장, 자동차 공장 등에 경제적으로 적용할 수 있고, 바닥 마감재로서의 강도특성이 향상되며, 내마모성 향상으로 중량물 적재 및 이동에 의한 바닥 마모 및 건조수축균열에 의한 하자를 저감시키는 자기수평 모르타르 조성물을 제공함에 그 목적이 있다.
INDUSTRIAL APPLICABILITY The present invention can be economically applied to semiconductor factories and automobile factories that require precise floor finishes, has improved strength characteristics as floor finishes, has improved wear resistance, and has a defect caused by floor wear and drying shrinkage cracks The mortar composition of the present invention can be reduced.
본 발명은 「11종보통포틀랜드시멘트 7~17중량부, A12O3가 30~40wt% 함유된 알루미나시멘트 10~25중량부, 무수석고 7~20중량부, 분말도 2,300~2,800㎠/g인 석회석 미분말 20~30중량부, 규사 40~80wt% 풍쇄슬래그 20~60wt%로 조성된 혼합골재 20~40중량부 및 유동화제 0.05~0.30중량부를 포함하는 SL 혼합물 100중량부를 기준으로 배합수가 20~30중량부 혼합된 조성된 자기수평 모르타르 조성물」을 제공한다.The present invention relates to an alumina cement composition comprising 7 to 17 parts by weight of 11-kind ordinary Portland cement, 10 to 25 parts by weight of alumina cement containing 30 to 40% by weight of Al 2 O 3 , 7 to 20 parts by weight of anhydrous gypsum, 20 to 30 parts by weight of limestone fine powder, 20 to 40 parts by weight of a mixed aggregate composed of 40 to 80% by weight of crushed slag 20 to 60% by weight, and 0.05 to 0.30 part by weight of a fluidizing agent, based on 100 parts by weight of the SL mixture ≪ / RTI > to 30 parts by weight of a mixed self-leveling mortar composition.
상기 SL 혼합물은 본 발명이 제공하는 자기수평 모르타르 조성물에서 배합수를 제외한 나머지 구성 성분의 혼합물을 칭하는 것이며, 이하 [특허청구범위], [발명을 실시하기 위한 구체적인 내용] 등에서도 마찬가지이다.
The SL mixture is a mixture of the remaining components except the compounding water in the self-level mortar composition provided by the present invention, and the same applies to [Claims] and [Specific contents for carrying out the invention].
상기 풍쇄슬래그는 입도 0.01~0.6mm, 경도 8이상, 비중 3.4~3.6, 흡수율 0.2wt% 이하인 것을 적용하여 자기수평 모르타르의 강도 및 마모저항성을 향상시킬 수 있다. 또한, 상기 풍쇄슬래그는 CaO를 18~28wt% 함유하고, 상기 CaO 중 Free-CaO가 0.2~0.4wt% 함유된 것을 적용하여 적정 범위 내 팽창효과로 인한 강도를 증진시키고 수축보상에 따라 균열을 저감시킬 수 있다.
The crumbled slag may have a particle size of 0.01 to 0.6 mm, a hardness of 8 or more, a specific gravity of 3.4 to 3.6, and a water absorption of 0.2 wt% or less to improve the strength and abrasion resistance of the magnetic horizontal mortar. In addition, the above-mentioned culvert slags contain 18 to 28 wt% of CaO and 0.2 to 0.4 wt% of Free-CaO in the CaO is used to increase the strength due to the expansion effect within a proper range and to reduce cracks .
또한, 상기 SL 혼합물에는 폴리머수지 3~7중량부 또는 리듐카보네이트 0.05~0.25중량부를 포함시키거나 소포제 0.1~0.3중량부, 경화지연제 0.02~0.20중량부, 증점제 0.03~0.15중량부 및 안정화제 0.01~0.10중량부를 한 가지 이상 포함시켜 적용할 수 있으며, 상기 폴리머수지, 리듐카보네이트, 소포제, 경화지연제, 증점제 및 안정제를 모두 함께 적용할 수도 있다.
The SL mixture may contain 3-7 parts by weight of polymer resin or 0.05-0.25 parts by weight of lithium carbonate, 0.1-0.3 parts by weight of an antifoaming agent, 0.02-0.20 parts by weight of a curing retarder, 0.03-0.15 parts by weight of a thickener, and 0.01-0.15 parts by weight of a stabilizer 0.01 To 0.10 part by weight, and the polymer resin, the lithium carbonate, the antifoaming agent, the curing retarder, the thickener and the stabilizer may all be applied together.
전술한 바에 따라 조성된 자기수평 모르타르 조성물은 굳지 않은 모르타르의 슬럼프플로우 220~250mm, 재령 28일 압축강도 30~40MPa, 길이변화율 -0.02~0.00% 등의 물성이 발현되고, 마모저항성이 EN13818(2002) 규격 상 AR1 등급 이상(AR1~S등급)으로 발현되도록 할 수 있다.
The self-leveling mortar composition prepared according to the above-mentioned method exhibits physical properties such as a slump flow of hard mortar of 220 to 250 mm, a compression strength of 30 to 40 MPa at 28 days of age, and a rate of change of -0.02 to 0.00% ), It can be expressed in AR1 grade or higher (AR1 ~ S grade).
본 발명에 따른 자기수평 모르타르 조성물에는 다음의 효과가 있다. The self-leveling mortar composition according to the present invention has the following effects.
1. 본 발명은 정밀한 바닥 마감을 요구하는 반도체 공장, 자동차 공장 등에 경제적으로 적용할 수 있다.1. The present invention can be economically applied to semiconductor factories, automobile factories, and the like that require precise floor finishes.
2. 바닥 마감재로서의 강도특성이 향상되며, 내마모성 향상(마모등급 AR1 이상)으로 중량물 적재 및 이동에 의한 바닥 마모 및 건조수축균열에 의한 하자가 저감된다.
2. Improvement of strength property as floor finish and improvement of abrasion resistance (wear grade AR1 or more) reduces flaws caused by bottom wear and drying shrinkage cracks due to heavy load and movement.
본 발명은 「1종보통포틀랜드시멘트 7~17중량부, A12O3가 30~40wt% 함유된 알루미나시멘트 10~25중량부, 무수석고 7~20중량부, 분말도 2,300~2,800㎠/g인 석회석 미분말 20~30중량부, 규사 40~80wt% 풍쇄슬래그 20~60wt%로 조성된 혼합골재 20~40중량부 및 유동화제 0.05~0.30중량부를 포함하는 SL 혼합물 100중량부를 기준으로 배합수가 20~30중량부 혼합된 조성된 자기수평 모르타르 조성물」을 제공한다.
The present invention relates to a cement paste composition comprising 7 to 17 parts by weight of one kind of ordinary Portland cement, 10 to 25 parts by weight of alumina cement containing 30 to 40 wt% of Al 2 O 3 , 7 to 20 parts by weight of anhydrous gypsum, 20 to 30 parts by weight of limestone fine powder, 20 to 40 parts by weight of a mixed aggregate composed of 40 to 80% by weight of crushed slag 20 to 60% by weight, and 0.05 to 0.30 part by weight of a fluidizing agent, based on 100 parts by weight of the SL mixture ≪ / RTI > to 30 parts by weight of a mixed self-leveling mortar composition.
상기 1종보통포틀랜드시멘트 및 알루미나시멘트는 결합재이다. The above-mentioned one ordinary Portland cement and alumina cement are binders.
상기 알루미나시멘트는 Al2O3 성분에 의해 조강성 및 고강도 발현에 기여한다. 조강성 및 고강도 발현을 위해서는 알루미나시멘트 중의 Al2O3 성분이 30wt% 이상이 되어야 하지만, 40wt%를 초과하면 경화과정에서의 팽창성이 커지고 안정성이 떨어지므로, 본 발명에서는 A12O3가 30~40wt% 함유된 상기 알루미나시멘트를 적용해야 한다.The alumina cement contributes to the development of toughness and high strength by the Al 2 O 3 component. Division rigidity and therefore if the Al 2 O 3 component in the alumina cement exceeds be more than 30wt%, however, 40wt% is inflatable is increased stability of the curing process down to a high intensity expressed, in the present invention, A1 2 O 3 is 30 to The above-mentioned alumina cement containing 40 wt% should be applied.
상기 1종보통포틀랜드시멘트 7~17중량부일 때, 상기 알루미나시멘트가 10중량부 미만이면 조기강도 발현 효과가 크지 않고 결합재의 절대량이 감소하므로 모르타르 조직이 치밀화되지 못하여 강도가 저하된다. 반면 알루미나시멘트가 25중량부를 초과하면 응결속도가 빨라져 작업시간 확보에 어려움이 따르게 된다.
When the alumina cement is less than 10 parts by weight, the effect of early strength development is insufficient and the absolute amount of the binder is reduced, so that the mortar structure is not densified and the strength is lowered. On the other hand, if the alumina cement exceeds 25 parts by weight, the setting speed is increased, which makes it difficult to secure the working time.
상기 무수석고는 결정수를 갖지 않는 황산칼슘(CaSO4)으로서, 상기 알루미나시멘트와 반응하여 침상형의 에트린자이트를 형성시켜 모르타르 조직을 치밀화하고 건조 수축을 보상한다. 반수석고를 사용하면 압축강도는 더욱 향상되지만 모르타르 조직의 취성 증가로 인해 마모저항성이 저하되므로 본 발명에서는 무수석고를 적용한다.The anhydrous gypsum is calcium sulfate (CaSO 4 ) having no crystal number and reacts with the alumina cement to form an acicular type ettringite to densify the mortar structure and compensate for drying shrinkage. The use of semi-gypsum improves the compressive strength, but reduces the abrasion resistance due to the increase in the embrittlement of the mortar structure, so anhydrous gypsum is applied in the present invention.
상기 알루미나시멘트가 10~25중량부일 때, 상기 무수석고를 7중량부 미만 사용할 때에는 전술한 수축보상 효과가 미미하게 되고, 상기 무수석고가 20중량부를 초과하면 팽창 성능이 지나치게 커져 모르타르 마감 후 표면에 미세균열이 발생할 수 있다.
When the alumina cement is used in an amount of 10 to 25 parts by weight, when the anhydrite is used in an amount less than 7 parts by weight, the aforementioned shrinkage compensation effect becomes insignificant. When the anhydrite is more than 20 parts by weight, the expansion performance becomes excessively large. Microcracks may occur.
상기 석회석 미분말은 모르타르 조성물의 적정 유동성 발현을 위한 건조 모르타르의 입도 조정을 위해 적용된다. 따라서, 분말도가 2,300~2,800㎠/g인 석회석 미분말이 20~30중량부 적용된다.The limestone fine powder is applied to adjust the particle size of the dry mortar for proper fluidity of the mortar composition. Therefore, 20-30 parts by weight of the limestone fine powder having a powder degree of 2,300-2,800 cm2 / g is applied.
상기 석회석 미분말 사용량이 20중량부 미만이면 유동성은 증가하나 점성이 저하되어 재료분리가 발생하고, 상기 석회석 미분말 사용량이 30중량부를 초과하면 점성이 증가하여 고유동성을 발휘하기 어렵게 되고, 작업성이 저하된다.
When the amount of the limestone fine powder used is less than 20 parts by weight, the fluidity is increased but the viscosity is lowered and the material separation occurs. When the amount of the limestone fine powder used exceeds 30 parts by weight, the viscosity is increased to make it difficult to exhibit high fluidity, do.
본 발명에는 규사 40~80wt% 및 풍쇄슬래그 20~60wt%로 조성된 혼합골재가 20~40중량부 포함된다. 상기 규사는 일반적인 시멘트 기반 SL재에 잔골재로 적용되는데 본 발명에서는 규사의 일부를 풍쇄슬래그로 치환하여 적용하는 것이다.
In the present invention, 20 to 40 parts by weight of a mixed aggregate composed of 40 to 80% by weight of silica sand and 20 to 60% by weight of crushed stone slag is included. The silica sand is applied as a fine aggregate to a general cement based SL material. In the present invention, a part of silica sand is replaced with a cobbled slag.
본 발명에서 상기 규사는 잔골재 및 채움재의 역할을 하는 것으로서, 7호사 또는 8호사를 적용하는 것이 바람직하다.
In the present invention, the silica sand serves as a fine aggregate and a filler, and it is preferable to use No. 7 or No. 8 silica.
상기 풍쇄슬래그는 작은 물입자가 혼입된 공기를 일정한 송풍압력으로 분무하여 분무지역을 형성하고 상기의 분무지역에 용융상태의 제강슬래그를 직접 통과시키는‘아토마이징 공정’을 통해 스피넬구조를 갖는 강도와 경도가 매우 높은 구형의 결정체이다.The cobbled slag is formed by spraying air having small water particles at a predetermined blowing pressure to form a spray zone and passing the molten steel slag directly to the spray zone through an atomizing process, It is a spherical crystal with a very high hardness.
상기 풍쇄슬래그는 규사보다 경도가 높고, 흡수율이 낮아 잔골재와 시멘트 페이스트간의 결합력을 증대시켜 자기수평 모르타르의 강도 및 마모저항성을 향상시킨다. 본 발명에 적용되는 풍쇄슬래그는 입도 0.01~0.6mm, 경도 8이상, 비중 3.4~3.6, 흡수율 0.2wt% 이하의 물성이 충족되는 것을 적용하며, 아래의 [표 2]는 본 발명에 적용되는 풍쇄슬래그와 규사의 일정량을 임의로 채취하여 각 물성을 시험한 결과를 정리한 것이다.The tumbled slag has a higher hardness than that of silica sand and has a low water absorption rate, thereby increasing the bonding strength between the fine aggregate and the cement paste, thereby improving the strength and abrasion resistance of the horizontal mortar. The tumbled slag used in the present invention is a tumbled slag having a particle size of 0.01 to 0.6 mm, a hardness of 8 or more, a specific gravity of 3.4 to 3.6 and a water absorption of 0.2 wt% or less. A certain amount of slag and silica sand were randomly sampled and the results of the tests for each property were summarized.
상기 풍쇄슬래그의 입도가 0.6mm를 초과하는 경우에는 자기수평 모르타르의 타설두께가 3~5mm일 때, 표면 평탄화에 문제가 발생할 수 있다.When the granular slag has a particle size exceeding 0.6 mm, there may arise a problem in surface planarization when the thickness of the magnetic horizontal mortar is 3 to 5 mm.
또한, 본 발명에서는 CaO를 18~28wt% 함유하고, 상기 CaO 중 Free-CaO가 0.2~0.4wt% 함유된 풍쇄슬래그를 적용할 수 있다. 아래의 [표 3]은 본 발명에 적용되는 풍쇄슬래그 일정량을 임의로 채취하여 화학성분을 분석한 결과를 나타낸 것이다.In the present invention, a crushed slag containing 18 to 28 wt% of CaO and 0.2 to 0.4 wt% of Free-CaO in CaO may be applied. Table 3 below shows the result of analyzing the chemical composition of a certain amount of the crushed stone slag applied to the present invention.
(wt%)content
(wt%)
풍쇄슬래그 내 CaO 함량이 18~28wt%일 때 팽창효과로 인해 공극이 충전되어 조직이 치밀화되고, 수축 보상 효과가 있어 균열을 저감시킨다. 상기 풍쇄슬래그 내 미량(CaO 함량의 0.2~0.4wt%)의 Free-CaO도 수화반응(Free-CaO + H2O → Ca(OH)2)으로 수축 보상 효과에 기여하며, 일반 규사에 흡수율이 크게 낮고([표 2]에서는 6배 이상 차이), 이에 따라 수축량이 감소되므로 이 점에서도 건조수축에 의한 균열 방지에 기여한다.When the CaO content in the crushed slag is 18 ~ 28wt%, the pore is filled due to the expansion effect, and the structure is densified and the shrinkage compensation effect is reduced to reduce the crack. Free-CaO hydration reaction (free-CaO + H 2 O → Ca (OH) 2 ) of trace amount (0.2 to 0.4 wt% of CaO content) in the above-mentioned crushed slag contributes to the shrinkage compensation effect. (In Table 2, the difference is more than 6 times), and thus the shrinkage amount is reduced, which contributes to prevention of cracks due to drying shrinkage.
다만, 상기 CaO 함량이 18wt% 미만인 경우에는 강도 증가 및 수축 보상 효과가 미미하게 되고, CaO 함량이 28wt를 초과하는 경우에는 오히려 과도한 팽창에 의해 균열이 발생할 수 있다.
However, when the CaO content is less than 18 wt%, the strength increase and the shrinkage compensation effect become insignificant. When the CaO content exceeds 28 wt%, cracks may occur due to excessive expansion.
본 발명에서는 상기 SL 혼합물에 유동화제가 0.5~0.3중량부 혼합되는데, 이는 배합수량을 감소시킴으로써 자기수평 모르타르의 압축강도를 증가시키면서 굳지 않은 모르타르의 유동성을 확보하기 위한 것이다. 이에 따라 본 발명에 배합수는 상기 SL 혼합물 100중량부 대비 20~30중량부 적용된다.
In the present invention, 0.5 to 0.3 parts by weight of the fluidizing agent is mixed in the SL mixture to increase the compressive strength of the self-leveling mortar and to secure the fluidity of the unhardened mortar by reducing the mixing amount. Accordingly, the water content in the present invention is 20 to 30 parts by weight based on 100 parts by weight of the SL mixture.
본 발명이 제공하는 자기수평 모르타르 조성물에는 폴리머수지를 더 포함하여 조성함으로써, 경화된 모르타르의 내마모성, 휨강도 및 인장강도를 향상시킬 수 있다. 경화된 모르타르의 내마모성, 휨강도 및 인장강도가 가장 우수하게 발현되도록 하기 위한 상기 폴리머수지의 최적 첨가량은 SL 혼합물 내 3~7중량부이다. 상기 폴리머수지로는 비닐계 재분산 분말 수지를 적용할 수 있다.
The self-horizontal mortar composition provided by the present invention further comprises a polymer resin to improve the abrasion resistance, bending strength and tensile strength of the cured mortar. The optimum addition amount of the polymer resin for the expression of the abrasion resistance, flexural strength and tensile strength of the hardened mortar is 3 to 7 parts by weight in the SL mixture. As the polymer resin, a vinyl-based redispersed powder resin can be applied.
본 발명은 자기수평 모르타르 조성물의 응결 이후 조기강도를 증가시키기 위해 상기 SL 혼합물에 리듐카보네이트 0.05~0.30중량부를 더 포함하여 조성할 수 있다. 상기 리듐카보네이트를 0.05중량부 미만 사용시에는 오픈타임(Open time) 확보가 어렵고, 0.30중량부를 초과 적용하는 경우에는 응결지연 및 재료분리가 발생할 수 있다.
The present invention may further comprise 0.05 to 0.30 parts by weight of lithium carbonate in the SL mixture to increase the early strength after solidification of the self-level mortar composition. When the lithium carbonate is used in an amount less than 0.05 parts by weight, it is difficult to secure an open time. When the lithium carbonate is used in an amount exceeding 0.30 parts by weight, delay of coagulation and separation of materials may occur.
또한, 본 발명은 자기수평 모르타르 조성물 내의 기포(entraped air) 제거 및 깨끗한 마감면을 얻기 위해 상기 SL 혼합물에 소포제를 0.05~0.3중량부 더 첨가할 수 있다. 상기 소포제가 0.05중량부 미만 첨가되는 경우에는 기포 제거가 어렵고, 소포제가 0.3중량부를 초과하여 첨가되는 경우에는 기포 제거 효과 대비 경제성이 떨어진다. 상기 소포제로는 폴리글리콜계를 적용할 수 있다.
Further, the present invention can further add 0.05 to 0.3 parts by weight of defoaming agent to the SL mixture to remove entrained air in the self-leveling mortar composition and to obtain a clean finished surface. When the defoaming agent is added in an amount less than 0.05 part by weight, it is difficult to remove air bubbles. When the defoaming agent is added in an amount exceeding 0.3 parts by weight, the economical efficiency is lower than the defoaming effect. As the antifoaming agent, a polyglycol-based agent can be applied.
자기수평 모르타르 조성물의 응결을 지연시켜, 작업 진행 동안의 작업성을 확보하기 위해서는 상기 SL 혼합물에 경화지연제를 0.02~0.15중량부 첨가할 수 있다. 다만, 상기 경화지연제를 0.02중량부 미만 첨가하는 경우에는 오픈 타임(Open Time) 확보가 어렵게 되고, 0.15중량부를 초과하도록 첨가하는 경우에는 응결지연 및 재료분리가 발생할 수 있다.
0.02 to 0.15 parts by weight of a curing retarder may be added to the SL mixture in order to retard the coagulation of the self-leveling mortar composition and ensure workability during the course of the work. However, when the curing retardant is added in an amount of less than 0.02 parts by weight, it is difficult to secure an open time. When the curing retardant is added in an amount exceeding 0.15 parts by weight, delay of coagulation and separation of materials may occur.
자기수평 모르타르 조성물의 접착력 향상 및 재료분리 방지를 위해서는 상기 SL 혼합물에 증점제를 0.03~0.15중량부 첨가할 수 있으며, 이 때 상기 증점제로는 메틸셀룰로오스를 적용할 수 있다.In order to improve the adhesion of the self-level mortar composition and to prevent material separation, 0.03 to 0.15 part by weight of a thickener may be added to the SL mixture, and methyl cellulose may be used as the thickener.
또한, 자기수평 모르타르 조성물의 재료분리 방지 및 배합수량 변동에 대한 안정성을 증가시키기 위해서는 상기 SL 혼합물에 안정화제를 0.01~0.10중량부 첨가할 수 있다. 상기 안정화제를 0.01중량부 미만 첨가할 때에는 효과가 나타나지 않으며, 0.10중량부를 초과 적용하는 경우에는 유동성이 저하될 수 있다. 상기 안정화제로는 구아검을 적용할 수 있다.
In addition, in order to prevent the material separation of the self-leveling mortar composition and increase the stability against variation in the mixing amount, 0.01 to 0.10 part by weight of the stabilizer may be added to the SL mixture. When the stabilizer is added in an amount of less than 0.01 part by weight, the effect is not exhibited. When the stabilizer is applied in an amount exceeding 0.10 part by weight, the flowability may be lowered. As the stabilizer, guar gum may be applied.
아래의 [표 4]는 전술한 알루미나시멘트, 무수석고, 석회석 미분말, 폴리머수지, 리듐카보네이트 등의 특성을 이용하여 기존의 SL재와 비교할 때 동등 이상의 물성이 발현되도록 조성한 자기수축 모르타르의 배합표이다. 이하에서는 [표 4]에 나타난 배합으로 조성된 자기수축 모르타르 조성물을 시험예1 이라 칭한다.The following Table 4 is a blending table of self-shrinking mortar prepared so as to exhibit a property equal to or greater than that of existing SL materials by using the above-mentioned characteristics of alumina cement, anhydrous gypsum, limestone fine powder, polymer resin, lithium carbonate and the like. Hereinafter, the self-shrunk mortar composition prepared from the formulation shown in [Table 4] is referred to as Test Example 1.
아래의 [표 5]와 [표 6]은 기존의 SL재와, 시험예1 및 상기 시험예1의 규사를 20~100wt% 범위에서 풍쇄슬래그(PS)로 치환한 시험예2 내지 시험예6에 대한 유동성, 응결속도, 압축강도, 길이변화, 마모저항성, 재료분리 등의 시험결과를 정리하여 나타낸 것이다. 특히, 내마모성 시험은 기존SL재와 시험예1 내지 시험예6 모두 타설 두께 4mm 조건에서 실시하였다.The following [Table 5] and [Table 6] are the same as those in Test Examples 2 to 6 in which the conventional SL material and the silica sand of Test Example 1 and Test Example 1 were replaced with the cobalt slag (PS) in the range of 20 to 100 wt% And the test results such as fluidity, coagulation speed, compressive strength, length change, abrasion resistance, material separation, etc. are summarized. Particularly, in the abrasion resistance test, both the existing SL material and the test examples 1 to 6 were carried out under the conditions of the casting thickness of 4 mm.
division
(규사대비 wt%)PS replacement rate
(Wt% against silica sand)
(규사 대비 wt%)PS replacement rate
(Wt% against silica sand)
(%)Change in length
(%)
(mm)Abrasion resistance
(mm)
시험예1은 기존의 SL재에 비하여 압축강도 및 내마모성이 향상되고, 길이변화가 적어지나 여전히 마모등급은 EN13818(2002) 규격 상 AR2 등급인 것으로 나타났다. Test Example 1 showed improved compressive strength and abrasion resistance compared to conventional SL materials, and showed little change in length. However, the wear rating was still AR2 grade according to EN13818 (2002) standard.
시험예1의 조성성분 배합상태에서 규사를 풍쇄슬래그(PS)로 치환한 경우, 규사 대비 풍쇄슬래그(PS)의 치환율이 20~60wt%인 시험예2 내지 시험예4에서 마모등급이 EN13818(2002) 규격 상 AR1 등급 이상인 S(Special) 등급으로 나타났으며, 슬럼프플로우 220~250mm, 재령 28일 압축강도 30~40MPa, 길이변화율 -0.02~0.00% 등을 충족시키는 것으로 나타났다.In Test Examples 2 to 4, in which the substitution rate of the crumbled slag (PS) relative to the silica sand was 20 to 60 wt% when the silica sand was replaced with the crust slag (PS) in the composition composition of Test Example 1, ), And the slump flow was 220 ~ 250mm, the compressive strength was 30 ~ 40MPa at 28 days of age and the change rate of length was -0.02 ~ 0.00%.
규사 대비 풍쇄슬래그(PS)의 치환율이 80~100wt%인 시험예5 및 시험예6에서는 마모등급이 저하되고 재료분리가 발생하였다.
In Test Example 5 and Test Example 6 in which the substitution ratio of the crust slag (PS) to the silica sand was 80 to 100 wt%, the degree of wear decreased and the material separation occurred.
이상에서 본 발명에 대하여 구체적인 실시예와 함께 상세하게 살펴보았다. 그러나 본 발명은 위의 실시예에 의하여 한정되는 것은 아니며 본 발명의 요지를 벗어남이 없는 범위에서 수정 및 변형될 수 있다. 따라서 본 발명의 청구범위는 이와 같은 수정 및 변형을 포함한다.The present invention has been described in detail with reference to the preferred embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, but may be modified and changed without departing from the gist of the present invention. The claims of the present invention thus include such modifications and variations.
Claims (7)
상기 풍쇄슬래그는 입도 0.01~0.6mm, 경도 8이상, 비중 3.4~3.6, 흡수율 0.2wt% 이하이고, CaO를 18~28wt% 함유하며, 상기 CaO 중 Free-CaO가 0.2~0.4wt% 함유된 것을 특징으로 하는 자기수평 모르타르 조성물.
1 to 10 parts by weight of alumina cement containing 7 to 17 parts by weight of ordinary Portland cement and 30 to 40% by weight of A1 2 O 3 , 7 to 20 parts by weight of anhydrous gypsum and 20 to 200 parts by weight of a limestone fine powder having a powder fraction of 2,300 to 2,800 cm & 20 to 40 parts by weight of a mixed aggregate composed of 40 to 80% by weight of crushed slag and 20 to 60% by weight of silica sand and 0.05 to 0.30 part by weight of a fluidizing agent, based on 100 parts by weight of the SL mixture, Mixed,
The above crushed stone slag has a particle size of 0.01 to 0.6 mm, a hardness of 8 or more, a specific gravity of 3.4 to 3.6, a water absorption of 0.2 wt% or less, CaO of 18 to 28 wt%, and CaO of 0.2 to 0.4 wt% Characterized in that the mortar composition is a self-leveling mortar composition.
상기 SL 혼합물은 폴리머수지 3~7중량부를 더 포함하는 것을 특징으로 하는 자기수평 모르타르 조성물.
The method of claim 1,
Wherein the SL mixture further comprises 3 to 7 parts by weight of a polymeric resin.
상기 SL 혼합물은 리듐카보네이트 0.05~0.25중량부를 더 포함하는 것을 특징으로 하는 자기수평 모르타르 조성물.
The method of claim 1,
Wherein the SL mixture further comprises 0.05 to 0.25 parts by weight of lithium carbonate.
상기 SL 혼합물은 소포제 0.1~0.3중량부, 경화지연제 0.02~0.20중량부, 증점제 0.03~0.15중량부 및 안정화제 0.01~0.10중량부를 더 포함하는 것을 특징으로 하는 자기수평 모르타르 조성물.
The method of claim 1,
Wherein the SL mixture further comprises 0.1 to 0.3 parts by weight of a defoaming agent, 0.02 to 0.20 parts by weight of a curing retardant, 0.03 to 0.15 parts by weight of a thickener, and 0.01 to 0.10 parts by weight of a stabilizer.
슬럼프플로우 220~250mm, 재령 28일 압축강도 30~40MPa, 길이변화율 -0.02~0.00%이고, 마모저항성이 EN13818(2002) 규격 상 AR1 등급 이상인 것을 특징으로 하는 자기수평 모르타르 조성물. The method according to any one of claims 1 to 5,
A mortar composition having a slump flow of 220 to 250 mm, a 28-day compressive strength of 30 to 40 MPa, a longitudinal rate of change of -0.02 to 0.00% and an abrasion resistance of an AR1 grade or higher according to EN 13818 (2002).
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CN108751847A (en) * | 2018-06-16 | 2018-11-06 | 山东新大地环保建材有限公司 | Gravity flowing levelling mortar based on slag ball and construction method |
KR102447340B1 (en) | 2021-10-28 | 2022-09-26 | 현대건설주식회사 | Heavy mortar composition for flooring |
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JP5915303B2 (en) * | 2011-03-28 | 2016-05-11 | 宇部興産株式会社 | Self-leveling material and slurry |
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JP5915303B2 (en) * | 2011-03-28 | 2016-05-11 | 宇部興産株式会社 | Self-leveling material and slurry |
KR101066317B1 (en) * | 2011-05-03 | 2011-09-20 | 파슨스 브링커호프 아시아 리미티드 | Fire-proof self leveling flooring composite |
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CN108751847A (en) * | 2018-06-16 | 2018-11-06 | 山东新大地环保建材有限公司 | Gravity flowing levelling mortar based on slag ball and construction method |
KR102447340B1 (en) | 2021-10-28 | 2022-09-26 | 현대건설주식회사 | Heavy mortar composition for flooring |
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