KR102506548B1 - Expansion mortar with excellent initial and long-term expansion effect - Google Patents
Expansion mortar with excellent initial and long-term expansion effect Download PDFInfo
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- KR102506548B1 KR102506548B1 KR1020220043349A KR20220043349A KR102506548B1 KR 102506548 B1 KR102506548 B1 KR 102506548B1 KR 1020220043349 A KR1020220043349 A KR 1020220043349A KR 20220043349 A KR20220043349 A KR 20220043349A KR 102506548 B1 KR102506548 B1 KR 102506548B1
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 87
- 230000000694 effects Effects 0.000 title claims abstract description 32
- 230000007774 longterm Effects 0.000 title abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 118
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 23
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 239000011230 binding agent Substances 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims abstract description 10
- 239000002562 thickening agent Substances 0.000 claims abstract description 10
- 230000008439 repair process Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 3
- 229910021487 silica fume Inorganic materials 0.000 claims description 3
- 238000013329 compounding Methods 0.000 description 38
- 239000000203 mixture Substances 0.000 description 31
- 230000000052 comparative effect Effects 0.000 description 18
- 239000004567 concrete Substances 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 12
- 230000001070 adhesive effect Effects 0.000 description 12
- 238000001035 drying Methods 0.000 description 8
- 230000008602 contraction Effects 0.000 description 7
- 238000009472 formulation Methods 0.000 description 7
- 230000001603 reducing effect Effects 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000002411 adverse Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 239000011396 hydraulic cement Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011433 polymer cement mortar Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002563 ionic surfactant Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
-
- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
-
- 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
-
- 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
- C04B18/146—Silica fume
-
- 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
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
-
- 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
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust cements
-
- 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
-
- 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
- C04B28/08—Slag cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0032—Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value
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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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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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- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은, 토목구조물, 건축구조물의 시공 및 보수에 사용되는 팽창 모르타르에 관한 것이다. 더욱 상세하게는 CSA 팽창재 및 무기 팽창재를 포함하는 팽창재를 사용하여 타설 초기 및 장기적으로 우수한 수축저감 효과를 발휘하고, 유동성, 충전성, 내구성, 부착강도가 우수한 팽창 모르타르에 관한 것이다. The present invention relates to an expansive mortar used for construction and repair of civil structures and building structures. More specifically, it relates to an expanded mortar that exhibits excellent shrinkage reduction effect in the early and long term of pouring using an expansion material including a CSA expansion material and an inorganic expansion material, and has excellent fluidity, filling property, durability, and adhesive strength.
콘크리트 구조물에 균열이 발생하면, 균열을 통해 수분, 탄산가스, 산성비 등이 침투하게 되고, 이로 인해 콘크리트의 중성화, 콘크리트의 부동태 피막 파괴에 의한 철근 부식 등이 발생하게 되며, 구조물의 내구성, 안전성, 미관 등에 악영향을 미치게 된다. When a crack occurs in a concrete structure, moisture, carbon dioxide gas, acid rain, etc. penetrate through the crack, which causes neutralization of concrete and corrosion of reinforcing bars by destruction of the passivation film of concrete. It will adversely affect aesthetics, etc.
콘크리트 구조물의 균열은 수화열에 의한 온도균열, 소성수축에 의한 균열, 동결융해의 반복에 의한 균열, 알칼리-골재 반응에 의한 균열, 건조수축 균열 등에 의해 발생하게 된다. Cracks in concrete structures are caused by temperature cracks caused by heat of hydration, cracks caused by plastic shrinkage, cracks caused by repeated freezing and thawing, cracks caused by alkali-aggregate reactions, and cracks caused by drying shrinkage.
특히 콘크리트나 모르타르는 타설 후 시간 경과에 따라 경화하면서 체적이 감소하게 되고, 이렇게 수축이 발생하게 되면, 단면이나 부착면이 감소하여, 단면에는 건조수축이 발생할 수 있고, 부착면은 불연속면이 될 수 있으며, 콘크리트 구조물 내부에 미세한 간극이 발생하게 되어 결국 구조물의 내구성 및 안전성이 저하되는 문제가 발생한다. In particular, concrete or mortar reduces its volume as it hardens over time after placement, and when shrinkage occurs in this way, the cross section or adhesive surface decreases, drying shrinkage may occur on the cross section, and the adhesive surface may become a discontinuous surface. In addition, fine gaps are generated inside the concrete structure, resulting in a problem of deterioration in durability and safety of the structure.
콘크리트에 발생하는 균열 중 콘크리트나 모르타르의 수축에 기인하는 균열이 큰 비중을 차지하므로, 콘크리트나 모르타르 타설 후 발생하는 수축을 효과적으로 저감시키는 것이 중요하다. Among cracks occurring in concrete, cracks caused by shrinkage of concrete or mortar account for a large proportion, so it is important to effectively reduce shrinkage that occurs after concrete or mortar is placed.
따라서 콘크리트나 모르타르 타설 후 발생하는 수축량을 예측하고, 이러한 수축을 저감, 보상하여 균열을 억제하기 위해 팽창제나 팽창재를 사용하게 된다. Therefore, an expansion agent or expansion material is used to predict the amount of shrinkage that occurs after concrete or mortar is placed, and to suppress cracks by reducing and compensating for this shrinkage.
종래에는 팽창제(팽창재)로, 금속분말계 팽창제, 칼슘 설포 알루미네이트계 팽창재, 이온 또는 비이온계 계면활성제로 구성된 수축저감제 등을 주로 사용하여 왔다. Conventionally, metal powder-based expanding agents, calcium sulfoaluminate-based expanding agents, shrinkage reducing agents composed of ionic or nonionic surfactants, and the like have been mainly used as expanding agents (expandable materials).
그러나 종래의 금속분말계 팽창제의 경우 아주 적은 소량을 사용하므로, 콘크리트나 모르타르 내에서 균일하게 분산, 혼합되기가 어려웠고, 적절하게 균등분산이 되지 않을 경우에는 타설 초기에 부등수축 및 부등팽창이 발생하게 되는 문제가 있었다. However, in the case of the conventional metal powder-based expanding agent, since a very small amount is used, it is difficult to disperse and mix uniformly in concrete or mortar. there was a problem with
콘크리트, 모르타르의 수축은 타설 후 초기에 많이 발생하고, 이후 경화 과정을 거치면서 지속적으로 발생하기 때문에, 타설 초기의 수축뿐만 아니라 장기적인 수축을 모두 효율적으로 보상하여야 하는데, 종래의 칼슘 설포 알루미네이트계 팽창재는 타설 초기의 수축을 제대로 보상하지 못하는 문제가 있었다. Since the shrinkage of concrete and mortar occurs a lot in the early stage after placement and continues through the curing process, it is necessary to efficiently compensate for both the shrinkage at the beginning of placing and the long-term shrinkage. had a problem of not properly compensating for shrinkage at the beginning of casting.
따라서 타설 초기뿐만 아니라 경화 과정을 통해 수축을 효율적으로 보상할 수 있도록 하고, 압축강도, 부착강도, 유동성, 자기충전성 등이 우수한 팽창 모르타르의 개발이 요구되었다.Therefore, it was required to develop an expansive mortar capable of efficiently compensating for shrinkage not only at the beginning of pouring but also through the curing process, and having excellent compressive strength, adhesive strength, fluidity, and self-filling properties.
본 발명은, 위와 같은 종래의 문제점을 개선하기 위해, 타설 초기뿐만 아니라 장기적으로 발생하는 수축에 대해 효율적으로 보상할 수 있는 팽창 모르타르를 제공하는 것을 목적으로 한다. The present invention, in order to improve the above conventional problems, an object of the present invention is to provide an expansion mortar capable of efficiently compensating for shrinkage that occurs not only at the beginning of pouring but also in the long term.
본 발명은, 위와 같은 종래의 문제점을 해결하기 위해, 압축강도, 부착강도, 유동성, 자기충전성 등이 우수한 팽창 모르타르를 제공하는 것을 목적으로 한다. In order to solve the above conventional problems, an object of the present invention is to provide an expanded mortar having excellent compressive strength, adhesive strength, fluidity, self-filling property, and the like.
본 발명은, 각종 토목구조물 및 건축구조물의 시공 및 공법뿐만 아니라 단면복구 등과 같은 구조물의 보수에 효과적으로 사용할 수 있고, 장기적인 내구성이 우수한 팽창 모르타르를 제공하고자 한다. The present invention is intended to provide an expansive mortar that can be effectively used for repairing structures such as cross-section restoration as well as construction and construction methods of various civil and architectural structures and has excellent long-term durability.
본 발명에서는, 구조물의 시공 및 보수에 사용하는 그라우팅용 팽창 모르타르에 있어서, 상기 팽창 모르타르는 배합재료와 배합수를 포함하되, 상기 배합재료는, 시멘트 30~40 중량%; 결합재 5~15 중량%; 잔골재 43~53 중량%; 팽창재 3~8 중량%; 감수제 0.1~1.8 중량%; 소포제 0.05~0.1 중량%; 증점제 0.01~0.5 중량%; 수축저감제 1.0~2.5 중량%; 재유화형 분말수지 7~15 중량%; 고성능유동화제 0.2~1.2 중량%를 포함하고, 상기 팽창재는 CSA 팽창재 및 무기 팽창재를 포함하되, CSA 팽창재 27~52 중량%, 무기 팽창재 48~73 중량%를 포함하는 것을 특징으로 하는 타설 초기 및 장기 팽창 효과가 우수한 그라우팅용 팽창 모르타르를 제공한다.In the present invention, in the expansion mortar for grouting used in the construction and repair of structures, the expansion mortar includes a compounding material and a compounding water, wherein the compounding material comprises 30 to 40% by weight of cement; 5 to 15% by weight of binder; 43 to 53% by weight of fine aggregate; 3 to 8% by weight of an expanding material; 0.1 to 1.8% by weight of a water reducing agent; 0.05 to 0.1% by weight of an antifoaming agent; 0.01 to 0.5% by weight of a thickener; Shrinkage reducing agent 1.0 ~ 2.5% by weight; Re-emulsifying powder resin 7-15% by weight; It contains 0.2 to 1.2% by weight of a high-performance plasticizing agent, and the expansion material includes a CSA expansion material and an inorganic expansion material, but includes 27 to 52% by weight of a CSA expansion material and 48 to 73% by weight of an inorganic expansion material. An expansion mortar for grouting having excellent expansion effect is provided.
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상기 결합재는 고로슬래그 미분말, 플라이애시 및 실리카 퓸 중 적어도 하나 이상이 포함된다. The binder includes at least one of blast furnace slag fine powder, fly ash, and silica fume.
상기 팽창 모르타르는, 상기 배합재료 100중량부를 기준으로 배합수 19~25중량부를 포함하는 것을 특징으로 한다. The expanded mortar is characterized in that it comprises 19 to 25 parts by weight of the mixing water based on 100 parts by weight of the mixing material.
상기 CSA 팽창재의 분말도는 2,000~3,000cm2/g이고, 상기 무기 팽창재의 분말도는 2,500~4,000cm2/g인 것을 특징으로 한다. The CSA expandable material has a fineness of 2,000 to 3,000 cm 2 /g, and the inorganic expandable material has a fineness of 2,500 to 4,000 cm 2 /g.
상기 잔골재는, 0.3~1.2mm 50~60중량%, 1.2~2.0mm 20~25중량%, 2.0~2.5mm 20~25중량%를 포함한다. The fine aggregate includes 50 to 60% by weight of 0.3 to 1.2 mm, 20 to 25% by weight to 1.2 to 2.0 mm, and 20 to 25% by weight of 2.0 to 2.5 mm.
본 발명의 타설 초기 및 장기 팽창효과가 우수한 팽창 모르타르는 아래와 같은 효과를 가진다. The expansion mortar with excellent initial and long-term expansion effects of the present invention has the following effects.
첫째, 본 발명의 팽창 모르타르는 타설 직후 초기 수축에 대한 보상 뿐만 아니라, 타설 이후 장기적으로 발생하는 수축에 대한 보상 성능이 우수하여, 모르타르에 발생할 수 있는 건조수축, 균열 등을 효율적으로 방지할 수 있다.First, the expansion mortar of the present invention is excellent in compensating for the initial shrinkage immediately after pouring as well as for the long-term shrinkage after pouring, so that drying shrinkage and cracks that may occur in the mortar can be effectively prevented. .
둘째, 기존 콘크리트 구조물, 강재 및 지반과의 부착강도가 높아, 기존 콘크리트 구조물의 단면복구, 소일네일링 공법, 사면보강, 강관다단 그라우팅 터널 시공, 차수벽 시공 등에 매우 유용하게 사용될 수 있다. Second, it has high adhesion strength with existing concrete structures, steel materials and the ground, so it can be very useful for cross-section restoration of existing concrete structures, soil nailing method, slope reinforcement, steel pipe multi-stage grouting tunnel construction, and barrier wall construction.
셋째, 본 발명을 이루는 조성물들의 유기적인 결합에 의해 팽창재에 의한 강도 저하가 거의 없으면서, 재료분리 저항성, 워커빌리티, 충전성, 유동성 및 내구성 등이 우수하다. Third, the organic combination of the compositions constituting the present invention has excellent resistance to material separation, workability, filling, fluidity, durability, and the like, with little decrease in strength due to the expansion material.
아래에서는 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 쉽게 실시할 수 있도록 본 발명의 실시예를 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 명세서 전체에서, 어떤 부분이 어떤 구성요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 포함할 수 있는 것을 의미한다. Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice them. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.
본 발명은 지반그라우팅, 토목구조물, 건축구조물의 시공 및 보수(단면복구, 균열보수, 그라우팅)에 사용되는 모르타르에 관한 것으로, 구체적으로는 타설 초기뿐만 아니라 장기적인 팽창 효과가 우수한 팽창 모르타르에 관한 것이다. The present invention relates to a mortar used for ground grouting, construction and repair (section restoration, crack repair, grouting) of civil structures and building structures, and more specifically, to an expansion mortar having excellent long-term expansion effect as well as at the beginning of pouring.
본 발명의 팽창 모르타르는 배합재료에 배합수를 혼합하여 제조하되, 배합재료 100중량부를 기준으로 배합수 19~25중량부를 혼합하여 제조한다. The expanded mortar of the present invention is prepared by mixing the compounding water with the compounding material, but is prepared by mixing 19 to 25 parts by weight of the compounding water based on 100 parts by weight of the compounding material.
상기 배합재료는 시멘트; 결합재; 잔골재; 팽창재; 감수제; 소포제; 증점제, 수축저감제, 재유화형 분말수지 및 고성능유동화제를 포함한다.The compounding material is cement; binder; fine aggregate; expandable material; water reducing agent; antifoam; It includes a thickener, a shrinkage reducing agent, a re-emulsifying powder resin and a high performance fluidizing agent.
구체적으로, 시멘트 30~40 중량%; 결합재 5~15 중량%; 잔골재 43~53 중량%; 팽창재 3~8 중량%; 감수제 0.1~1.8 중량%; 소포제 0.05~0.1 중량%; 증점제 0.01~0.5 중량%; 수축저감제 1.0~2.5 중량%; 재유화형 분말수지 7~15 중량%; 고성능유동화제 0.2~1.2 중량%를 포함한다. 배합재료에 포함되는 상기 구성들은 배합재료에 포함되는 전체 구성들과 서로 유기적으로 맞물려 작용하게 되고, 각 구성의 조성비는 다른 구성들과의 결합관계를 고려하여 결정된 것이다. 아래에서 상기 구성들에 대해 자세히 설명한다.Specifically, 30 to 40% by weight of cement; 5 to 15% by weight of binder; 43 to 53% by weight of fine aggregate; 3 to 8% by weight of an expanding material; 0.1 to 1.8% by weight of a water reducing agent; 0.05 to 0.1% by weight of an antifoaming agent; 0.01 to 0.5% by weight of a thickener; Shrinkage reducing agent 1.0 ~ 2.5% by weight; Re-emulsifying powder resin 7-15% by weight; Contains 0.2 to 1.2% by weight of a high-performance plasticizing agent. The components included in the compounding material work organically with all the components included in the compounding material, and the composition ratio of each component is determined in consideration of the coupling relationship with other components. The configurations are described in detail below.
상기 시멘트는, 모르타르를 형성하는 기본적인 재료로서, 1종 보통 포틀랜드 시멘트를 사용할 수 있고, 시멘트의 분말도(비표면적)는 2800~3500 cm2/g이 바람직하다. As the cement, as a basic material for forming the mortar, one type of ordinary Portland cement may be used, and the cement has a fineness (specific surface area) of 2800 to 3500 cm 2 /g.
본 발명의 시멘트 조성비는, 배합재료에 포함되는 전체 구성들과 유기적으로 작용하게 되고, 시멘트의 조성비는 다른 구성들과의 결합관계를 고려하여 결정한다. The cement composition ratio of the present invention works organically with all components included in the compounding material, and the composition ratio of cement is determined in consideration of the bonding relationship with other components.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서, 시멘트의 양을 30중량% 미만으로 사용할 경우 모르타르 조직 간의 결합력이 약해 강도 및 내구성이 저하될 수 있고, 40중량%를 초과해서 사용할 경우 수화열에 의한 균열이 발생할 수 있고, 팽창재에 의한 수축보상 효과가 부족하게 된다. In the total composition ratio of the expanded mortar compounding material of the present invention, when the amount of cement is used at less than 30% by weight, the strength and durability may be lowered due to weak bonding between mortar structures, and when used at more than 40% by weight, cracks due to heat of hydration This may occur, and the effect of compensating for shrinkage by the expandable material is insufficient.
상기 결합재는 고로슬래그 미분말, 플라이애시 및 실리카 퓸 등 포졸란 물질 중에서 적어도 하나 이상을 선택하여 사용할 수 있다. The binder may be selected from at least one of pozzolanic materials such as blast furnace slag powder, fly ash, and silica fume.
포졸란 물질은 수화열을 감소시키고, 장기적으로 발현되는 잠재수경성에 의해 모르타르 내부의 조직을 치밀하게 형성시켜, 장기강도, 내구성, 수밀성, 내부식성 및 내화학성 등을 향상시키며, 알칼리-골재 반응을 억제시키고, 시멘트를 대체하는 만큼 이산화탄소 배출을 저감시키는 등의 효과를 발휘한다. Pozzolanic substances reduce the heat of hydration, form the structure inside the mortar densely by the long-term latent hydraulicity, improve long-term strength, durability, watertightness, corrosion resistance and chemical resistance, and suppress the alkali-aggregate reaction. , it exerts effects such as reducing carbon dioxide emissions as much as it replaces cement.
본 발명의 결합재 조성비는, 배합재료에 포함되는 전체 구성들과 유기적으로 작용하게 되고, 결합재의 조성비는 다른 구성들과의 결합관계를 고려하여 결정한다. The composition ratio of the binder of the present invention works organically with all components included in the compounding material, and the composition ratio of the binder is determined in consideration of the bonding relationship with other components.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 결합재의 양을 5~15중량%를 포함한다. 결합재의 양을 5중량% 미만으로 사용할 경우, 위와 같은 포졸란 물질의 효과를 얻기 힘들다. The amount of the binder in the total composition ratio of the expanded mortar compounding material of the present invention includes 5 to 15% by weight. When the amount of the binder is less than 5% by weight, it is difficult to obtain the above effect of the pozzolanic material.
따라서 본 발명의 배합재료 전체 조성비에서 결합재의 양을 5중량% 이상으로 하는 것이 바람직한데, 다만, 포졸란 물질에 의해 단위수량이 증가할 수 있고, 건조수축이 발생하는 문제가 발생할 수 있어, 본 발명에서는 수축저감제를 1.0~2.5중량% 포함하면서, 결합재의 양을 15중량% 이내로 함으로써 포졸란에 의한 효과를 극대화하면서, 포졸란에 의해 발생할 수 있는 건조수축을 방지하도록 한다. Therefore, it is preferable to set the amount of the binder to 5% by weight or more in the total composition ratio of the compounding material of the present invention. However, the unit quantity may increase due to the pozzolanic material and drying shrinkage may occur, which may cause problems in the present invention. In, while including 1.0 to 2.5% by weight of the shrinkage reducing agent, the amount of the binder is within 15% by weight to maximize the effect of pozzolan and prevent drying shrinkage that may occur due to pozzolan.
아울러 위와 같은 포졸란의 효과를 얻기 위한 결합재의 분말도는 3000~5000 cm2/g이 바람직하다.In addition, the powder degree of the binder to obtain the above pozzolan effect is preferably 3000 to 5000 cm 2 /g.
잔골재는 모르타르를 충전해주는 필러 역할을 수행하여 내구성, 강도를 높이기 위해 사용한다. 본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 잔골재는 43~53중량%를 포함한다. Fine aggregate is used to increase durability and strength by serving as a filler that fills the mortar. In the total composition ratio of the expanded mortar compounding material of the present invention, the fine aggregate contains 43 to 53% by weight.
본 발명의 전체 배합재료 중 잔골재의 양이 43중량% 미만일 경우에는 균열이 발생할 우려가 있고, 53중량%를 초과하게 되면 결합력이 부족하거나 유동성을 확보하기 어려워질 수 있다. If the amount of fine aggregate in the total compounding material of the present invention is less than 43% by weight, there is a risk of cracking, and if it exceeds 53% by weight, bonding strength may be insufficient or it may be difficult to secure fluidity.
상기 잔골재는 모래, 규사 등을 사용할 수 있고, 잔골재의 입경은 2.5mm 이하가 바람직하다. Sand, silica sand, etc. may be used as the fine aggregate, and the particle diameter of the fine aggregate is preferably 2.5 mm or less.
보다 상세하게는, 0.3~1.2mm 50~60중량%, 1.2~2.0mm 20~25중량%, 2.0~2.5mm 20~25중량%로 혼합하는 것이 더욱 바람직하다. 잔골재의 최대입경이 2.5mm를 넘으면 유동성, 자기충전성에 문제가 생길 수 있고, 2.0~2.5mm의 비율이 20중량% 미만이 되면 내구성에 악영향을 줄 수 있다. More specifically, it is more preferable to mix at 50 to 60% by weight of 0.3 to 1.2 mm, 20 to 25% by weight of 1.2 to 2.0 mm, and 20 to 25% by weight of 2.0 to 2.5 mm. If the maximum particle diameter of the fine aggregate exceeds 2.5 mm, problems may arise in fluidity and self-filling, and if the ratio of 2.0 to 2.5 mm is less than 20% by weight, durability may be adversely affected.
본 발명의 전체 배합재료 중 잔골재를 위와 같이 포함함으로써, 워커빌리티(workability), 충전성, 압축강도를 향상시키는 효과를 얻을 수 있다. By including the fine aggregate among all the compounding materials of the present invention as above, it is possible to obtain the effect of improving workability, fillability, and compressive strength.
본 발명에서는 타설 초기와 장기에 대한 효율적인 수축 보상을 확보하기 위해, CSA(calcium sulfo-aluminate) 팽창재와 무기 팽창재를 혼합한 팽창재를 사용한다. CSA 팽창재는 주로 장기적인 팽창 효과를 부여하고, 무기 팽창재는 주로 모르타르 타설 초기의 팽창 효과를 부여하여, 본 발명의 팽창재는 모르타르 타설 후 거의 전 기간에 대해 효과적인 팽창 효과를 발휘할 수 있게 한다. In the present invention, in order to ensure efficient contraction compensation for the initial stage of pouring and the long term, an expandable material in which a calcium sulfo-aluminate (CSA) expandable material and an inorganic expandable material are mixed is used. The CSA expansive mainly imparts a long-term expansive effect, and the inorganic expansive mainly imparts an expansive effect at the initial stage of mortar placement, so that the expansive material of the present invention can exert an effective expansive effect for almost the entire period after mortar placement.
본 발명의 팽창재 조성비는, 배합재료에 포함되는 전체 구성들과 유기적으로 작용하게 되고, 팽창재의 조성비는 다른 구성들과의 결합관계를 고려하여 결정한다. The composition ratio of the expandable material of the present invention works organically with all components included in the compounding material, and the composition ratio of the expandable material is determined in consideration of the coupling relationship with other components.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 팽창재의 양을 3~8중량%를 포함한다. 팽창재의 양을 3중량% 미만으로 사용할 경우, 모르타르의 수축을 제대로 보상하지 못하게 되고, 팽창재가 8중량%를 초과하게 되면, 과도한 팽창, 균열 발생 및 강도 저하 문제가 발생할 수 있다. The amount of the expansion material in the total composition ratio of the expansion mortar compounding material of the present invention includes 3 to 8% by weight. If the amount of the expansion material is less than 3% by weight, shrinkage of the mortar cannot be properly compensated for, and if the amount of the expansion material exceeds 8% by weight, problems such as excessive expansion, cracking and loss of strength may occur.
팽창재는 각기 그 기능을 발현하는 시기가 다르므로 재료의 선택 및 사용량의 선택을 제대로 사용하지 못할 경우, 균등하지 못한 분산으로 인한 부등수축, 부등팽창, 초기팽창 등으로 인하여 균열 및 탈락 등의 하자가 발생할 수 있는데, 본 발명에서는 CSA(calcium sulfo-aluminate) 팽창재와 무기 팽창재를 혼합하면서, 특별한 비율로 사용함으로써 초기 수축 및 장기 수축을 효과적으로 보상하고, 부등수축 및 부등팽창의 발생을 방지하게 된다. Since each expansion material has a different time to manifest its function, if the material selection and usage amount are not properly used, defects such as cracks and dropouts may occur due to unequal contraction, unequal expansion, and initial expansion due to uneven dispersion. In the present invention, CSA (calcium sulfo-aluminate) expansion material and inorganic expansion material are mixed and used in a special ratio to effectively compensate for initial contraction and long-term contraction, and prevent unequal contraction and unequal expansion from occurring.
구체적으로 초기 팽창 효과와 장기 팽창 효과가 효율적으로 발현되도록 하고, 모르타르의 내구성과 부착강도를 유지하기 위해, 본 발명의 팽창재는 CSA 팽창재 27~52중량%, 무기 팽창재 48~73중량%로 혼합하여 사용한다. Specifically, in order to efficiently express the initial expansion effect and the long-term expansion effect, and to maintain the durability and adhesive strength of the mortar, the expansion material of the present invention is mixed with 27 to 52% by weight of CSA expansion material and 48 to 73% by weight of inorganic expansion material. use.
이때 CSA 팽창재가 27중량% 미만이 되면, 장기 수축에 대한 보상이 제대로 이루어지기 어렵고, 무기 팽창재가 48중량% 미만이 되면, 초기 수축에 대한 보상이 적절히 이루어지기 어렵다. 그리고 CSA 팽창재가 52중량%를 초과하게 되면, 초기 수축에 대한 보상이 제대로 이루어지기 어렵고, 무기 팽창재가 73중량%를 초과하게 되면, 초기 수축에 대한 보상이 과도하게 이루어지고, 장기 수축에 대한 보상이 제대로 이루어지기 어렵다. At this time, if the CSA expandable material is less than 27% by weight, it is difficult to properly compensate for long-term shrinkage, and if the inorganic expandable material is less than 48% by weight, it is difficult to adequately compensate for initial shrinkage. And when the CSA expandable material exceeds 52% by weight, it is difficult to properly compensate for initial shrinkage, and when the inorganic expandable material exceeds 73% by weight, compensation for initial shrinkage is excessive and compensation for long-term shrinkage is made. This is difficult to do properly.
CSA(calcium sulfo-aluminate) 팽창재는 장기적으로 에트린가이트(ettringite)를 생성함으로써 시멘트 수화 반응에 의해 수축되는 부분을 보상하게 된다. CSA (calcium sulfo-aluminate) expansion material compensates for the shrinkage caused by cement hydration by generating ettringite in the long term.
무기 팽창재는 모르타르 내에서 물과 반응하여 수산화칼슘을 생성한다. 무기 팽창재의 팽창반응은 물과 무기계가 만나서 무기물질을 생성하는 과정에서 나타나는데, 모르타르 내에서 무기물질이 타설 초기에 생성됨으로써 건조수축 및 경화수축에 의한 체적의 감소를 방지하게 된다. The inorganic expansive reacts with water in the mortar to produce calcium hydroxide. The expansion reaction of the inorganic expandable material occurs in the process of generating inorganic materials when water and the inorganic system meet, and inorganic materials are formed in the initial stage of pouring in the mortar to prevent volume reduction due to drying shrinkage and curing shrinkage.
또한 본 발명의 무기 팽창재에 의해 균열에 대한 자기치유 효과를 얻을 수 있는데, 대기 중의 이산화탄소와 모르타르의 무기계 성분이 결합하여 석회성분이 형성되는 현상에 의해 자기치유 효과를 얻을 수 있다. In addition, the inorganic expandable material of the present invention can obtain a self-healing effect on cracks, and a self-healing effect can be obtained by a phenomenon in which lime components are formed by combining carbon dioxide in the atmosphere with inorganic components of mortar.
본 발명의 무기 팽창재는 CaO를 포함하는데, CaO는 무기 팽창재 중 35~75중량%를 포함하도록 하는 것이 바람직하다. The inorganic expandable material of the present invention includes CaO, and CaO is preferably included in 35 to 75% by weight of the inorganic expandable material.
팽창재의 최대 입경은 300μm 이하가 바람직하다. 최대 입경이 300μm를 넘으면, 모르타르 표면에 미시적인 요철이 형성될 수 있다. The maximum particle diameter of the expandable material is preferably 300 µm or less. When the maximum particle diameter exceeds 300 μm, microscopic irregularities may be formed on the mortar surface.
팽창재의 분말도는 다른 재료들과의 혼합 정도, 반응성, 팽창성능 및 경제성 등을 고려하여 결정하는데, CSA 팽창재의 분말도는 2,000~3,000cm2/g, 무기 팽창재의 분말도는 2,500~4,000cm2/g 이 바람직하다. The fineness of the expandable material is determined in consideration of the degree of mixing with other materials, reactivity, expansive performance , and economic feasibility. 2 /g is preferred.
CSA 팽창재의 분말도 2,000cm2/g, 무기 팽창재의 분말도 2,500cm2/g 미만에서는 장기적인 안정성이 나빠질 우려가 있고, CSA 팽창재의 분말도 3,000cm2/g, 무기 팽창재의 분말도 4,000cm2/g 을 초과하면 팽창성능이 저하되는 경우가 있다. If the powder density of the CSA expandable material is less than 2,000 cm 2 /g and the powder density of the inorganic expandable material is less than 2,500 cm 2 / g, long-term stability may be deteriorated . If /g is exceeded, the expansion performance may deteriorate.
본 발명에서는 단위수량을 감소하기 위해 감수제를 사용하고, 본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 감수제의 양을 0.1~1.8 중량%를 포함한다. 본 발명의 모르타르 배합재료 전체 조성비에서 감수제의 양을 0.1중량% 미만으로 사용할 경우, 감수효과가 부족하고, 양호한 유동성을 얻기 어려우며, 감수제 1.8중량%를 초과하게 되면, 강도 저하 문제가 발생할 수 있다. In the present invention, a water reducing agent is used to reduce the unit water quantity, and the amount of the water reducing agent in the total composition ratio of the expanded mortar compounding material of the present invention includes 0.1 to 1.8% by weight. When the amount of the water reducing agent in the total composition ratio of the mortar compounding material of the present invention is used at less than 0.1% by weight, the water reducing effect is insufficient and it is difficult to obtain good fluidity, and when the water reducing agent exceeds 1.8% by weight, a problem of strength reduction may occur.
소포제는 시멘트, 결합재, 잔골재, 재유화형 분말수지 등을 혼합할 때 연행될 수 있는 기포를 감소시키고 모르타르의 압축강도, 휨강도 저하를 방지하기 위해 사용한다. Antifoaming agents are used to reduce bubbles that may be entrained when mixing cement, binder, fine aggregate, redispersible powder resin, etc., and to prevent deterioration of compressive strength and flexural strength of mortar.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 소포제의 양을 0.05~0.1중량%를 포함한다. 소포제의 양을 0.05중량% 미만으로 사용할 경우, 기포 감소 효과가 충분하지 못하고, 소포제 0.1중량%를 초과하게 되면, 강도와 내구성에 악영향을 미치게 된다. 0.05 to 0.1% by weight of the antifoaming agent in the total composition ratio of the expanded mortar compounding material of the present invention. When the amount of the antifoaming agent is less than 0.05% by weight, the foam reducing effect is not sufficient, and when the amount of the antifoaming agent exceeds 0.1% by weight, strength and durability are adversely affected.
증점제는 모르타르의 점성을 증가시키는 혼화제로 다른 구성들과 혼합하여 재료분리 저항성을 높이고, 모르타르의 내구성을 향상시키기 위해 사용한다. A thickener is an admixture that increases the viscosity of mortar and is used to increase material separation resistance and improve durability of mortar by mixing with other components.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 증점제의 양을 0.01~0.5중량%를 포함한다. 본 발명의 모르타르 배합재료 전체 조성비에서 증점제의 양을 0.01중량% 미만으로 사용할 경우, 점성 증가 효과가 충분하지 못하고, 증점제 0.5중량%를 초과하게 되면, 점성이 과도하여 유동성, 충전성에 악영향을 줄 수 있다. The amount of the thickener in the total composition ratio of the expanded mortar compounding material of the present invention includes 0.01 to 0.5% by weight. When the amount of the thickener is used in an amount less than 0.01% by weight in the total composition ratio of the mortar compounding material of the present invention, the effect of increasing the viscosity is not sufficient, and when the amount of the thickener exceeds 0.5% by weight, the viscosity is excessive and may adversely affect fluidity and fillability. there is.
본 발명에서는, 모르타르의 건조수축을 저감시키고, 본 발명의 결합재에 의한 단위수량 증가를 감소시키기 위해 수축저감제를 사용한다. In the present invention, a shrinkage reducing agent is used to reduce the drying shrinkage of the mortar and to reduce the unit yield increase due to the binder of the present invention.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 수축저감제의 양을 1.0~2.5중량%를 포함한다. 본 발명의 모르타르 배합재료 전체 조성비에서 수축저감제의 양을 1.0중량% 미만으로 사용할 경우, 위와 같은 효과가 충분하지 못하고, 수축저감제 2.5중량%를 초과하게 되면, 불필요하게 비용이 상승할 뿐만 아니라, 굳지않은 모르타르의 유동성이 저하될 우려가 있다. 1.0 to 2.5% by weight of the shrinkage reducing agent in the total composition ratio of the expanded mortar compounding material of the present invention. When the amount of the shrinkage reducing agent is used at less than 1.0% by weight in the total composition ratio of the mortar compounding material of the present invention, the above effect is not sufficient, and when the amount of the shrinkage reducing agent exceeds 2.5% by weight, the cost increases unnecessarily. , there is a possibility that the fluidity of the unhardened mortar may decrease.
본 발명에서는, 모르타르 내부 조직을 치밀하게 하고, 강재 및 지반과의 부착력을 증대시키며, 모르타르의 내구성을 향상시키기 위해 재유화형 분말수지를 포함한다. 재유화형 분말수지는 시멘트와 미리 고르게 혼합하여 사용하는 것이 바람직하다. 미리 혼합함으로써, 분말수지가 균일하게 분산하여 작용하도록 하여 모르타르 전체의 내구성, 부착강도, 압축강도 등을 고르게 향상시킬 수 있다. In the present invention, a re-emulsifying type powder resin is included to make the internal structure of the mortar dense, increase the adhesion to the steel material and the ground, and improve the durability of the mortar. It is preferable to use the re-emulsifying powder resin after mixing it evenly with cement in advance. By pre-mixing, the powder resin can be uniformly dispersed and acted so that the durability, adhesion strength, compressive strength, etc. of the entire mortar can be evenly improved.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 재유화형 분말수지 7~15중량%를 포함한다. 본 발명의 모르타르 배합재료 전체 조성비에서 재유화형 분말수지의 양을 7중량% 미만으로 사용할 경우, 내구성이나 부착강도의 발현이 불충분할 수 있고, 재유화형 분말수지의 양이 15중량%를 초과하게 되면, 불필요하게 비용이 상승할 뿐만 아니라, 굳지 않은 모르타르의 유동성, 자기충전성이 저하될 우려가 있다. In the total composition ratio of the expanded mortar compounding material of the present invention, 7 to 15% by weight of the redispersible powder resin is included. When the amount of re-emulsification type powder resin is used at less than 7% by weight in the total composition ratio of the mortar compounding material of the present invention, the expression of durability or adhesive strength may be insufficient, and when the amount of redispersion type powder resin exceeds 15% by weight , Not only does the cost increase unnecessarily, but there is a possibility that the fluidity and self-filling properties of the unhardened mortar may deteriorate.
본 발명에서는, 모르타르에 유동성과 감수 기능을 부여하기 위해 고성능유동화제를 사용한다. 고성능유동화제는 분산작용에 의해 단위수량을 감소시키고, 적은 배합수로도 작업성이 향상되도록 하여 모르타르의 내구성과 강도를 증진시킨다. In the present invention, a high performance fluidizer is used to impart fluidity and water reducing function to the mortar. The high-performance plasticizing agent reduces the unit quantity by dispersing action and enhances the durability and strength of the mortar by improving workability even with a small number of mixing.
본 발명의 팽창 모르타르 배합재료의 전체 조성비에서 고성능유동화제의 양을 0.2~1.2중량%를 포함한다. 고성능유동화제의 양을 0.2중량% 미만으로 사용할 경우, 유동성 증대 및 감수효과가 부족하고, 고성능유동화제가 1.2중량%를 초과하게 되면, 재료분리가 발생할 수 있다. 0.2 to 1.2% by weight of the high-performance fluidizer in the total composition ratio of the expanded mortar compounding material of the present invention. When the amount of the high-performance fluidizing agent is used at less than 0.2% by weight, the fluidity enhancement and water reducing effect are insufficient, and when the high-performance fluidizing agent exceeds 1.2% by weight, material separation may occur.
위에서 설명한 비율에 따라 배합재료가 혼합, 제조될 수 있고, 본 발명의 팽창 모르타르는 상기 배합재료에 배합수를 혼합하여 제조하되, 배합재료 100중량부를 기준으로 배합수 19~25중량부를 혼합하여 제조한다. The compounding materials may be mixed and prepared according to the ratio described above, and the expansion mortar of the present invention is prepared by mixing the compounding water with the compounding material, but is prepared by mixing 19 to 25 parts by weight of the compounding water based on 100 parts by weight of the compounding material. do.
배합수는 모르타르를 비비고, 타설할 때 필요로 하는 유동성을 부여하고, 시멘트와의 수화반응을 위해 사용한다. Mixing water is used for mixing mortar, imparting fluidity required for pouring, and for hydration reaction with cement.
위와 같이 배합된 배합재료 100중량부를 기준으로 배합수 19중량부 미만일 경우에는 필요로 하는 워커빌리티, 유동성 등을 확보하기 어렵고, 25중량부를 초과하는 경우에는 재료분리가 발생할 우려가 있고, 본 발명의 팽창재에도 불구하고 건조수축 및 균열이 발생할 수 있으며, 내구성, 압축강도, 부착강도 등에 악영향을 초래할 수 있다. If the amount of blending water is less than 19 parts by weight based on 100 parts by weight of the blended material blended as above, it is difficult to secure the required workability and fluidity, and if it exceeds 25 parts by weight, there is a risk of material separation, and the expandable material of the present invention Despite this, drying shrinkage and cracks may occur, and adverse effects may occur on durability, compressive strength, and adhesive strength.
본 발명의 팽창 모르타르의 물리적 특성을 평가하기 위하여, 표 1(단위 : 중량%)과 같은 실시예 1, 2 및 비교예 1, 2, 3의 배합을 실시하였다. 배합에 따른 재료적 특성을 검증하기 위해 5가지 모두에 대해 배합수를 동일하게 적용하였고, 5가지 배합 모두에 대해 배합재료 100중량부를 기준으로 배합수 22중량부를 혼합하였다. 시멘트는 5가지 모두 동일하게 1종 보통 포틀랜드 시멘트를 사용하였다. In order to evaluate the physical properties of the expanded mortar of the present invention, the formulations of Examples 1 and 2 and Comparative Examples 1, 2 and 3 as shown in Table 1 (unit: weight%) were carried out. In order to verify the material properties according to the formulation, the same number of formulations was applied to all 5 formulations, and 22 parts by weight of the formulation number was mixed based on 100 parts by weight of the formulation materials for all 5 formulations. As for the cement, the same type 1 ordinary Portland cement was used for all 5 types.
표 1에서, 실시예 1, 2는 본 발명에 의한 배합재료를 적용한 것이고, 비교예 1은 팽창재를 사용하지 않은 경우, 비교예 2는 팽창재로 CSA 팽창재만 사용한 경우, 비교예 3은 무기 팽창재만 사용한 경우이다. In Table 1, Examples 1 and 2 apply the compounding material according to the present invention, Comparative Example 1 does not use an expandable material, Comparative Example 2 uses only a CSA expandable material as an expandable material, and Comparative Example 3 uses only an inorganic expandable material. if it is used
KS F 2432(주입 모르타르의 컨시스턴시 시험방법) 및 KS F 4044(수경성 시멘트 무수축 그라우트)에 규정되어 있는 방법에 의해, 유하시험을 실시하고, 재령 7일 압축강도를 측정하였으며, 접착강도는 KS F 2476(폴리머 시멘트 모르타르의 시험 방법)에 규정된 방법에 의해 측정하였고, 팽창효과를 확인하기 위해, KS F 2424(모르타르 및 콘크리트의 길이 변화 시험 방법)에 규정되어 있는 방법에 의해 재령 4주의 길이변화율(‘-’는 수축, ‘+’는 팽창을 나타내는 것이다)을 측정하고, 그 결과를 표 2에 나타내었다. According to the method specified in KS F 2432 (test method for consistency of injected mortar) and KS F 4044 (hydraulic cement non-shrinkage grout), a flow test was conducted, and the compressive strength at 7 days of age was measured. The adhesive strength was KS F 2476 (Test method for polymer cement mortar), and to confirm the expansion effect, the length change rate at 4 weeks of age by the method specified in KS F 2424 (Length change test method for mortar and concrete) ('-' indicates contraction, '+' indicates expansion) was measured, and the results are shown in Table 2.
(초)flow test
(candle)
(MPa)compressive strength
(MPa)
(MPa)adhesive strength
(MPa)
(%)length change rate
(%)
KS F 2432(주입 모르타르의 컨시스턴시 시험방법)에 규정된 깔때기(상단부 내경 70mm, 하단부 내경 10mm, 높이 420mm, 유출관의 길이 30mm) 속에 실시예 1, 2 및 비교예 1, 2, 3에 의해 반죽된 모르타르를 완전히 채우고, 모르타르의 유출이 멈출 때까지 소요된 시간을 스톱워치로 측정(단위 : 초)하여 모르타르의 컨시스턴시(consistency), 충전성을 확인하였다. Knead according to Examples 1, 2 and Comparative Examples 1, 2 and 3 in a funnel (upper inner diameter 70mm, lower inner diameter 10mm, height 420mm, outflow pipe length 30mm) specified in KS F 2432 (Test method for consistency of injection mortar) The mortar was completely filled, and the time required until the outflow of the mortar stopped was measured with a stopwatch (unit: seconds) to check the consistency and fillability of the mortar.
깔때기에 의한 유하 시험 결과, 실시예 1은 모르타르의 유출이 멈추는데 19.4초, 실시예 2는 20.2초가 소요되어, 비교예 1, 2, 3(평균 31.6초)에 비해 약 39% 정도 충전성능이 우수한 것을 확인하였다. As a result of the flow test using the funnel, Example 1 took 19.4 seconds to stop the outflow of the mortar, and Example 2 took 20.2 seconds, resulting in about 39% higher filling performance than Comparative Examples 1, 2, and 3 (average 31.6 seconds). It was confirmed that it was excellent.
따라서 본 발명의 팽창 모르타르를 구조물 보수, 소일네일, 앵커 등의 그라우팅에 사용하는 경우, 그라우팅 주입압을 대폭 낮출 수 있고, 주입압을 가하지 않고, 중력에 의해 흘려 넣는 방식으로 주입하는 것도 가능해진다. Therefore, when the expansion mortar of the present invention is used for structural repair, soil nail, anchor grouting, the grouting injection pressure can be significantly lowered, and it is also possible to pour by gravity without applying injection pressure.
그라우팅시 주입압 절감 효과 및 주입압력 없이 그라우팅이 가능하도록 하는 이러한 특별한 효과는 본 발명의 배합재료에 포함된 구성들의 유기적인 결합 및 상호작용에 의해 유동성, 자기충전성 등이 향상된 결과로 얻을 수 있는 효과이다.This special effect of reducing the injection pressure during grouting and enabling grouting without injection pressure is an effect that can be obtained as a result of improved fluidity, self-filling, etc. by the organic combination and interaction of components included in the compounding material of the present invention am.
KS F 4044(수경성 시멘트 무수축 그라우트)에 규정된 방법으로 실시예 1, 2와 비교예 1, 2, 3에 대해 재령 7일 압축강도를 측정한 결과, 실시예 1, 2는 팽창재를 사용하지 않은 비교예 1과 비교하여 압축강도의 저하가 거의 없는 것을 확인할 수 있었다. As a result of measuring the compressive strength at 7 days of age for Examples 1 and 2 and Comparative Examples 1, 2 and 3 by the method specified in KS F 4044 (hydraulic cement non-shrinkage grout), Examples 1 and 2 did not use an expansion material Compared to Comparative Example 1, it was confirmed that there was almost no decrease in compressive strength.
모르타르의 바람직한 접착강도(부착강도)는 1.5MPa 이상이고, 보다 바람직하게는 1.7MPa 이상이다. KS F 2476(폴리머 시멘트 모르타르의 시험 방법)에 규정된 방법에 의해 실시예 1, 2와 비교예 1, 2, 3에 대해 접착강도(부착강도)를 측정한 결과, 실시예 1의 경우 1.7MPa, 실시예 2의 경우 1.9MPa로 나와 부착강도가 양호함을 알 수 있었다. The preferred adhesive strength (adhesion strength) of the mortar is 1.5 MPa or more, more preferably 1.7 MPa or more. As a result of measuring the adhesive strength (adhesion strength) for Examples 1 and 2 and Comparative Examples 1, 2 and 3 by the method specified in KS F 2476 (Test method for polymer cement mortar), in the case of Example 1, 1.7 MPa , in the case of Example 2, it was found to be 1.9 MPa, indicating that the adhesion strength was good.
KS F 2424(모르타르 및 콘크리트의 길이 변화 시험 방법)에 규정된 방법에 의해 실시예 1, 2와 비교예 1, 2, 3의 길이변화율을 측정한 결과, 실시예 1, 2는 모르타르의 수축이 발생하지 않고, 팽창하는 것을 확인할 수 있었다. 이는 본 발명의 CSA 팽창재와 무기 팽창재 및 이들과 유기적으로 결합된 배합재료의 효율적인 작용에 의한 것이다.As a result of measuring the length change rate of Examples 1 and 2 and Comparative Examples 1, 2 and 3 by the method specified in KS F 2424 (Test method for length change of mortar and concrete), Examples 1 and 2 showed that the mortar shrinkage It was confirmed that it does not occur and expands. This is due to the efficient action of the CSA expandable material of the present invention, the inorganic expandable material, and the compounding material organically combined with them.
팽창재를 사용하지 않은 비교예 1의 결과를 보면, 일정 부분 수축이 발생하는 것을 확인할 수 있었고, 비교예 2, 3에서는 어느 정도의 수축 보상을 얻을 수는 있었으나, 제대로 된 팽창효과를 얻기에는 부족하였다. Looking at the results of Comparative Example 1 without using an expandable material, it was confirmed that some contraction occurred, and in Comparative Examples 2 and 3, some shrinkage compensation was obtained, but it was insufficient to obtain a proper expansion effect. .
상기 시험결과값들로부터 본 발명의 팽창 모르타르는 유동성, 충전성이 우수하고, 강도 저하가 거의 없으며, 모르타르의 수축이 발생하지 않아, 지반 그라우팅, 다양한 토목구조물 및 건축구조물의 신축 및 보수에 활용될 수 있는 것을 확인할 수 있다. From the above test results, the expansion mortar of the present invention has excellent fluidity and filling properties, almost no strength loss, and no mortar shrinkage, so it can be used for ground grouting, new construction and repair of various civil and architectural structures. You can check what you can.
본 발명의 실시예는 예시적인 것에 불과하며, 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 다른 실시예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 진정한 기술적 보호 범위는 청구범위의 기술적 사상에 의하여 정해져야 할 것이다.The embodiments of the present invention are merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the claims.
없음doesn't exist
Claims (9)
상기 팽창 모르타르는 배합재료와 배합수를 포함하되,
상기 배합재료는,
시멘트 30~40 중량%;
결합재 5~15 중량%;
잔골재 43~53 중량%;
팽창재 3~8 중량%;
감수제 0.1~1.8 중량%;
소포제 0.05~0.1 중량%;
증점제 0.01~0.5 중량%;
수축저감제 1.0~2.5 중량%;
재유화형 분말수지 7~15 중량%;
고성능유동화제 0.2~1.2 중량%를 포함하고,
상기 팽창재는 CSA 팽창재 및 무기 팽창재를 포함하되, CSA 팽창재 27~52 중량%, 무기 팽창재 48~73 중량%를 포함하는 것을 특징으로 하는
타설 초기 및 장기 팽창 효과가 우수한 그라우팅용 팽창 모르타르.In the expansion mortar for grouting used in the construction and repair of structures,
The expansion mortar includes a mixing material and a mixing water,
The blending material is
30-40% by weight of cement;
5 to 15% by weight of binder;
43 to 53% by weight of fine aggregate;
3 to 8% by weight of an expanding material;
0.1 to 1.8% by weight of a water reducing agent;
0.05 to 0.1% by weight of an antifoaming agent;
0.01 to 0.5% by weight of a thickener;
Shrinkage reducing agent 1.0 ~ 2.5% by weight;
Re-emulsifying powder resin 7-15% by weight;
Contains 0.2 to 1.2% by weight of a high-performance plasticizing agent,
The expansion material includes a CSA expansion material and an inorganic expansion material, characterized in that it comprises 27 to 52% by weight of the CSA expansion material and 48 to 73% by weight of the inorganic expansion material
Expansion mortar for grouting with excellent expansion effect at the beginning of pouring and for a long time.
상기 결합재는 고로슬래그 미분말, 플라이애시 및 실리카 퓸 중 적어도 하나 이상이 포함되는
타설 초기 및 장기 팽창 효과가 우수한 그라우팅용 팽창 모르타르.According to claim 1,
The binder contains at least one of blast furnace slag fine powder, fly ash and silica fume
Expansion mortar for grouting with excellent expansion effect at the beginning of pouring and for a long time.
상기 팽창 모르타르는, 상기 배합재료 100중량부를 기준으로 배합수 19~25중량부를 포함하는 것을 특징으로 하는,
타설 초기 및 장기 팽창 효과가 우수한 그라우팅용 팽창 모르타르.According to claim 1,
The expanded mortar is characterized in that it contains 19 to 25 parts by weight of the mixing water based on 100 parts by weight of the mixing material,
Expansion mortar for grouting with excellent expansion effect at the beginning of pouring and for a long time.
상기 CSA 팽창재의 분말도는 2,000~3,000cm2/g이고,
상기 무기 팽창재의 분말도는 2,500~4,000cm2/g인 것을 특징으로 하는
타설 초기 및 장기 팽창 효과가 우수한 그라우팅용 팽창 모르타르.According to claim 1,
The powder degree of the CSA expandable material is 2,000 to 3,000 cm 2 /g,
Characterized in that the powder degree of the inorganic expandable material is 2,500 to 4,000 cm 2 /g
Expansion mortar for grouting with excellent expansion effect at the beginning of pouring and for a long time.
상기 잔골재는, 0.3~1.2mm 50~60중량%, 1.2~2.0mm 20~25중량%, 2.0~2.5mm 20~25중량%를 포함하는
타설 초기 및 장기 팽창 효과가 우수한 그라우팅용 팽창 모르타르.
The method of any one of claims 1 and 6 to 8,
The fine aggregate includes 0.3 to 1.2 mm 50 to 60% by weight, 1.2 to 2.0 mm 20 to 25% by weight, 2.0 to 2.5 mm 20 to 25% by weight
Expansion mortar for grouting with excellent expansion effect at the beginning of pouring and for a long time.
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