KR101392433B1 - Method for manufacturing lightweight aerated concrete with enhanced quick setting property - Google Patents
Method for manufacturing lightweight aerated concrete with enhanced quick setting property Download PDFInfo
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- KR101392433B1 KR101392433B1 KR1020140000721A KR20140000721A KR101392433B1 KR 101392433 B1 KR101392433 B1 KR 101392433B1 KR 1020140000721 A KR1020140000721 A KR 1020140000721A KR 20140000721 A KR20140000721 A KR 20140000721A KR 101392433 B1 KR101392433 B1 KR 101392433B1
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
- B28C5/006—Methods for mixing involving mechanical aspects
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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
- C04B14/10—Clay
- C04B14/106—Kaolin
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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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0641—Polyvinylalcohols; Polyvinylacetates
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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
- C04B24/16—Sulfur-containing 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
- C04B28/04—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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/40—Porous or lightweight materials
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 급결성이 우수한 경량기포콘크리트 제조방법에 관한 것으로, 보다 상세하게는 상온 급결성을 증대시켜 연약지반 보강채움재, 교각 뒷채움재, 터널분락구 보강재, 층간소음저감재로 활용할 수 있도록 한 급결성이 우수한 경량기포콘크리트 제조방법에 관한 것이다.
More particularly, the present invention relates to a method of manufacturing a lightweight foamed concrete having excellent triboelectricity, and more particularly, to a method of manufacturing a lightweight foamed concrete excellent in triboelectricity, The present invention relates to a method of producing a lightweight foamed concrete having excellent weatherability and excellent weatherability.
주지된 바와 같이, 경량기포콘크리트는 그 자체가 일반 콘크리트에 비하여 압축강도 등이 다소 떨어지는 문제점을 내포하고는 있으나, 그 비중이 일반콘크리트에 비하여 현저히 낮을 뿐만 아니라, 보온성도 뛰어나 건축물의 내력벽을 제외한 부분에 사용하는 경우 콘크리트자체의 하중으로부터 건축물을 보호할 수 있음은 물론이고, 건축물의 내부와 외부의 온도차이에 대한 차단능력이 뛰어나 단열재로서의 용도를 지니며, 방음효과도 뛰어나서 건축재로서 호평을 받고 있다.As is well known, lightweight foamed concrete itself has a problem in that its compressive strength is somewhat lower than that of ordinary concrete, but its specific gravity is significantly lower than that of ordinary concrete, and it is excellent in thermal insulation, , It can protect the building from the load of the concrete itself and also has the ability to block the temperature difference between the inside and the outside of the building and has a use as a heat insulating material and has a good soundproof effect and is favored as a building material .
이러한 경량기포콘크리트는 시멘트에 기포제가 혼합 사용되는데, 기포제로는 통상 동물성, 식물성, 단백질 기포제 또는 알루미늄 분말, 음이온 계면활성제 등이 사용된다.Such lightweight foamed concrete is mixed with a foam agent in cement. An animal, vegetable, protein foam, aluminum powder, anionic surfactant and the like are usually used as a foam agent.
그런데, 이러한 경량기포콘크리트는 고온 고압의 반응기(오토클래이브)에서 양생하여야 하기 때문에 제조비용이 증대되고, 나아가 발포된 시멘트를 경화시키기 위해서는 높은 열에너지가 필요하므로 시멘트의 양생을 위한 시간이 매우 오래 걸리는 단점이 있다.However, since such lightweight foamed concrete must be cured in a high-temperature and high-pressure reactor (autoclave), the manufacturing cost is increased, and furthermore, a high heat energy is required to cure the foamed cement, There are disadvantages.
이를 해결하기 위해, 선행 기술들에서는 급결성을 향상시킬 수 있는 조성물들을 개발하였는데, 대표적인 예로 조강시멘트나 포틀랜드 시멘트를 응용한 예들이다.To solve this problem, prior arts have developed compositions capable of improving toughness. Typical examples include applications of crude steel cement or Portland cement.
하지만, 선행 기술들에 나타난 경량기포콘크리트는 급결성이 향상되기는 하였으나 상온 경화성에 있어 아직도 더 많은 개량이 필요하며, 더구나 급결성 향상에 촛점을 맞추다 보니 정작 경량기포콘크리트의 사용처에 맞는 단열성, 내후성, 보강성 등이 다소 저하되는 부차적인 문제를 야기하기도 하였다.However, although the lightweight foamed concrete shown in the prior art has improved the tackability, it still requires further improvement in the room temperature hardening property. Moreover, since the focus is on the improvement of the tackiness, the lightweight foamed concrete, But also a secondary problem in which the reinforcing property is slightly lowered.
뿐만 아니라, 무분별한 조성물 구성에 따라 인체에 유해한 환경물질들이 방출되는 문제도 나타나기 시작하였다.In addition, the problem of releasing environmental substances harmful to the human body due to the indiscriminate composition of the composition has started to appear.
이에, 상온 경화성을 증대시켜 급결성 문제를 해결하면서 보수 보강성도 뛰어나고 인체에 무해하여 환경보호에도 탁월한 새로운 개념의 경량기포콘크리트의 개발 필요성이 시급하게 요청되고 있다.
Therefore, there is an urgent need to develop a lightweight foamed concrete having a new concept that is excellent in maintenance and reinforcement and harmless to the human body by solving the problem of quickness by increasing the room temperature curability and protecting the environment.
본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점을 감안하여 이를 해결하고자 창출된 것으로, 상온 급결성을 증대시켜 연약지반 보강채움재, 교각 뒷채움재, 터널분락구 보강재, 층간소음저감재로 활용할 수 있도록 한 급결성이 우수한 경량기포콘크리트 제조방법을 제공함에 그 주된 목적이 있다.
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems in the prior art, and has been made to solve the above problems, and it is an object of the present invention to increase the room temperature temperature and to utilize it as soft ground reinforcement filler material, bridge backfill material, tunnel slab reinforcement material, The present invention provides a method of manufacturing a lightweight foamed concrete excellent in a flatness and a flatness.
본 발명은 상기한 목적을 달성하기 위한 수단으로, 주성분인 포틀랜트 시멘트 100중량부에 대해, 라우릴황산나트륨 2.4-9.2중량부, 메타카올린 30-50중량부, 알루민산소다 2.5-6.5중량부, C12A7 12~18중량부, PVA(Polyvinyl Alcohol)섬유 11-17중량부, CSA(Calcium Sulfo-Aluminate) 클링커 6.1-12.8중량부, BA(buthyl acrylate) 15-25중량부, 파라핀왁스 7-16중량부의 조성비를 갖는 조성물을 이용하여 급결성이 우수한 경량기포콘크리트 제조방법에 있어서; 물과 라우릴황산나트륨을 1:2의 부피비로 희석하는 기포제 희석단계; 포틀랜트시멘트와 메타카올린, C12A7, PVA섬유를 상기 조성비 내에서 교반기에 넣고, 교반하여 포틀랜트시멘트와 PVA섬유 사이의 공극으로 메타카올린, C12A7, PVA섬유가 완전히 침투할 수 있도록 분산 혼합시키는 1차 혼합단계; 1차 혼합된 혼합물을 상기 조성비 범위로 유지되는 기포제에 투입하여 발포에 따른 기포가 소포되지 않으면서 균일하게 혼합될 수 있도록 하는 기포제와 1차 혼합물 교반단계; 기포제가 균일하게 혼합분산된 혼합물에 BA를 첨가하여 혼합물의 점성을 높이는 2차 혼합단계; 2차 혼합된 혼합물에 CAS클링커와 파라믹왁스를 동시에 첨가하면서 상기 1차 교반속도 보다 상대적으로 2배 이상 빠른 속도로 교반하여 급결 촉진성을 갖는 성분들이 신속하게 분산되도록 유도하는 상온 경화 촉진단계;를 포함하는 것을 특징으로 하는 급결성이 우수한 경량기포콘크리트 제조방법을 제공한다.As a means for achieving the above object, the present invention provides a method for producing a cement mortar composition, comprising 100 parts by weight of a main component of portland cement, 2.4 to 9.2 parts by weight of sodium laurylsulfate, 30 to 50 parts by weight of meta kaolin, 2.5 to 6.5 parts by weight of sodium aluminate, 12 to 18 parts by weight of C 12 A 7, 11 to 17 parts by weight of PVA (polyvinyl alcohol) fiber, 6.1 to 12.8 parts by weight of CSA (calcium sulfo-aluminate) clinker, 15 to 25 parts by weight of BA (buthyl acrylate) -16 parts by weight of a composition having a composition ratio of 100 parts by weight or less; A foaming dilution step of diluting water and sodium lauryl sulfate in a volume ratio of 1: 2; The mixture of portland cement, meta-kaolin, C 12 A 7 , and PVA fibers was placed in a mixer with the above composition ratio, and stirred to complete penetration of meta-kaolin, C 12 A 7 and PVA fibers into the gap between the portland cement and the PVA fiber A first mixing step of dispersing and mixing the mixture; Mixing the first mixed mixture into a foaming agent maintained in the composition ratio range so that the foaming agent can be uniformly mixed without foaming the foams; A secondary mixing step in which BA is added to the mixture in which the foaming agent is uniformly mixed and dispersed to increase the viscosity of the mixture; Mixing the CAS clinker and the paramic wax simultaneously with the secondary mixed mixture while stirring the mixture at a rate two times higher than the primary stirring speed so as to rapidly disperse the components having accelerated promotability; The present invention also provides a method of manufacturing a lightweight foamed concrete excellent in quick-spreading property.
이때, 상기 기포제 희석단계에서, 발포성 향상을 위해 상기 라우릴황산나트륨이 첨가되는 조성비의 범위 내에서 과붕산나트륨을 라우릴황산나트륨과 1:0.5의 부피비로 혼합하여 더 첨가하는 것에도 그 특징이 있다.At this time, in the foaming dilution step, sodium borohydride is mixed with sodium lauryl sulfate at a volume ratio of 1: 0.5 in the range of the composition ratio in which the sodium lauryl sulfate is added in order to improve the foaming property.
또한, 상기 1차 혼합단계에서는 50-70rpm으로 교반하고, 상기 상온 경화 촉진단계에서는 220-250rpm으로 교반하는 것에도 그 특징이 있다.
In addition, stirring is performed at 50-70 rpm in the primary mixing step, and stirring is performed at 220-250 rpm in the room temperature curing promotion step.
본 발명에 따르면, 상온 급결성이 우수해져 공사기간을 단축하고, 후속공정을 처리하기 쉬우며, 원가 및 인거비를 절감하고, 시공의 용이성을 달성함은 물론 유해물질 방출이 안되기 때문에 환경친화적인 경량기포콘크리트를 제공하는 효과를 얻을 수 있다.
Industrial Applicability According to the present invention, it is possible to provide a method for manufacturing a semiconductor device which is excellent in room temperature temperature dispensing property, shortens a construction period, is easy to process a subsequent process, reduces cost and detachment ratio, achieves ease of construction, Lightweight foamed concrete can be provided.
이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명 설명에 앞서, 이하의 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시예들은 다양한 형태로 실시될 수 있으며, 본 명세서에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니된다.Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.
또한, 본 발명의 개념에 따른 실시예는 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있다. 그러나, 이는 본 발명의 개념에 따른 실시예들을 특정한 개시 형태에 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경물, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.In addition, the embodiment according to the concept of the present invention can make various changes and have various forms. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.
본 발명에 따른 급결성이 우수한 경량기포콘크리트는 주성분인 포틀랜트 시멘트에 기포제 및 급결제, 그리고 보수재 및 유화제, 점결제를 더 포함하여 상온 경화성을 높임으로써 급결성을 강화시키되, 점성 증대를 통해 크랙을 방지하고, 섬유질을 포함함으로써 인장력도 증대시켜 보수 보강재로도 손색이 없도록 한 조성물을 포함한다.The lightweight foamed concrete according to the present invention further comprises a foaming agent, a quick-setting agent, a repairing agent, an emulsifying agent and a binder in the main component of the portland cement to enhance the room temperature hardening property to enhance the toughness, And also includes a composition in which a tensile force is increased by including fibers to make it suitable as a repair reinforcing material.
이때, 상기 조성물은 주성분인 포틀랜트 시멘트 100중량부에 대하여, 라우릴황산나트륨 2.4-9.2중량부, 메타카올린 30-50중량부, 알루민산소다 2.5-6.5중량부, C12A7 12~18중량부, PVA(Polyvinyl Alcohol)섬유 11-17중량부, CSA(Calcium Sulfo-Aluminate) 클링커 6.1-12.8중량부, BA(buthyl acrylate) 15-25중량부, 파라핀왁스 7-16중량부로 조성된다.At this time, the composition comprises 2.4 to 9.2 parts by weight of sodium laurylsulfate, 30 to 50 parts by weight of sodium laurylsulfate, 2.5 to 6.5 parts by weight of sodium aluminosilicate, 12 to 18 parts by weight of C 12 A 7 to 18 parts by weight 11 to 17 parts by weight of a PVA (polyvinyl alcohol) fiber, 6.1-12.8 parts by weight of a CSA (calcium sulfo-aluminate) clinker, 15-25 parts by weight of BA (buthyl acrylate) and 7-16 parts by weight of paraffin wax.
여기에서, 상기 라우릴황산나트륨은 기포제로 작용하며, 메타카올린은 보수 보강시 결합력과 밀찰력을 높이는데 기여하고, 알루민산소다는 액상 급결제로서 급결성을 증대시키는데 작용하며, C12A7는 속결성, 즉 알루민산소다의 급결 보조제로 사용되고, PVA섬유는 바인더로서의 기능 및 공극형성을 통한 투수성 증대로 혼화성형성을 향상시키며, CSA클링커는 상온 경화를 위한 급결시 수화열을 낮춰 초기 강도 저하를 막고 시멘트의 조강성을 높이는데 기여하고, BA는 접착성 향상 및 크랙 방지 기능을 수행하며, 파라핀왁스는 상온 경화시 공기중 산소 유입을 차단하여 경화를 촉진하는 기능을 수행한다.Here, the sodium lauryl sulfate acts as a foaming agent, and meta kaolin contributes to enhance bonding force and tightening force during repair and reinforcement, and sodium aluminate acts as a liquid-phase quick-setting agent to enhance saturation, and C 12 A 7 The CSA clinker lowers the hydration heat at the time of quenching for the room temperature hardening and lowers the initial strength of the PVA fiber due to the increase of permeability through functioning as a binder and porosity formation. And BA improves adhesiveness and prevents cracks while paraffin wax functions to promote curing by blocking oxygen inflow in air at room temperature curing.
보다 구체적으로, 상기 성분들의 첨가이유를 설명하면 다음과 같다.More specifically, the reason for adding the above components will be described as follows.
먼저, 라우릴황산나트륨은 기포제로서, 일종의 계면활성제이며 계면의 장력을 저하시켜 발포성은 높이는 작용을 한다.First, sodium lauryl sulfate is a kind of surfactant as a foaming agent, and acts to increase the foaming property by lowering the tension at the interface.
때문에, 2.4중량부 미만으로 첨가되면 발포성이 떨어지고, 9.2중량부를 초과하면 과발포성에 의한 유동성 증가로 포틀랜트 시멘트의 경화촉진을 저해하므로 상기 범위로 한정되어야 한다.Therefore, if it is added in an amount less than 2.4 parts by weight, foaming property is deteriorated. If the amount is more than 9.2 parts by weight, the flowability of the portland cement is deteriorated due to increased foaming property.
특히, 상기 라우릴황산나트륨은 물에 희석시켜 사용함이 바람직한데, 이때 희석비는 부피비로 물:라우릴황산나트륨이 1:2의 비율을 가져야 기능 저하없이 발포성 증대에 기여할 수 있다.Particularly, the sodium lauryl sulfate is preferably diluted with water. In this case, the dilution ratio should be 1: 2 in terms of the volume ratio of water to laurylsulfate so that the dilution ratio can contribute to the increase in the foamability without deteriorating the function.
덧붙여, 소량 첨가하면서도 발포성 향상을 위해, 상기 라우릴황산나트륨이 첨가되는 조성비의 범위 내에서 과붕산나트륨을 1:0.5의 부피비로 혼합하여 첨가할 수 있다.In addition, in order to improve the foamability while adding a small amount of sodium lauryl sulfate, sodium perborate may be added in a mixing ratio of 1: 0.5 by volume within the range of the composition ratio to which the sodium lauryl sulfate is added.
과붕산나트륨은 물과 결합하여 화학적으로 반응하면서 산소를 발생시키므로 발포성 향상을 촉진할 수 있는데, 과량 첨가되면 유동성 증대에 따른 급결성 저하를 초래하므로 상기 비율로 희석된 라우릴황산나트륨과 1:0.5의 부피비로 첨가되어야 하며, 이 경우 과붕산나트륨과 반응하는 물은 라우릴황산나트륨의 희석시킨 물로 한정된다.And sodium borate are chemically reacted with water to generate oxygen, thereby promoting the improvement of foamability. If added in excess, the addition of sodium lauryl sulfate causes a decrease in the durability due to an increase in fluidity, so that the ratio of sodium lauryl sulfate to sodium lauryl sulfate And in this case the water reacting with the sodium perborate is limited to the diluted water of sodium lauryl sulphate.
그리고, 메타카올린(MetaKaolin)은 시멘트 입자와 세골재 등의 보수 보강재 사이의 공극을 메워 경화체가 치밀한 조직을 가질 수 있도록 하기 위해 첨가되는데, 이러한 메타카올린은 SiO2, Al2O3, Fe2O3를 주성분으로 하고 있으며, 여기에 CaO, MgO, K2O, Na2O 등이 포함되어 이루어진 물질이다.Meta kaolin is added to fill voids between cement particles and fine aggregate such as fine aggregate so that the hardened body can have a dense structure. Meta kaolin is added to SiO 2 , Al 2 O 3 , Fe 2 O 3 Is a material mainly composed of CaO, MgO, K 2 O, Na 2 O and the like.
특히, 상기 메타카올린은 시멘트의 수화반응에 의해 생성되는 수산화칼슘을 규산칼슘 수화물로 전이시켜 보강재와의 부착력을 증가시켜 고강도 발현이 가능하게 한다.In particular, the meta-kaolin converts calcium hydroxide produced by the hydration reaction of cement into calcium silicate hydrate to increase the adhesion with the reinforcing material, thereby enabling high-strength development.
뿐만 아니라, 경화체 내부조직을 치밀하게 함으로써 투수성이나 흡수성을 감소시켜 중성화, 동결융해 등에 대한 저항성을 증대시키므로 내구성을 향상시킨다.In addition, by densifying the internal structure of the hardened body, permeability and water absorbency are reduced, and resistance to neutralization, freezing and thawing is increased, thereby improving durability.
아울러, 상기 메타카올린은 단기적으로 에트링가이트(Ettringite)의 생성과 시멘트 중의 C3S의 활성화로 초기강도를 증대시키며, 중장기적으로는 수산화칼슘과의 반응으로 내구성과 압축강도를 향상시킨다.In addition, the meta kaolin increases the initial strength by the formation of ettringite and activation of C 3 S in the cement in the short term, and improves durability and compressive strength by reaction with calcium hydroxide in the medium and long term.
이와 같은 메타카올린은 본 발명에서 30~50중량%로 한정하여 첨가되어야 하는데, 만약 30중량% 미만으로 첨가되게 되면 수화반응에 의해 생성되는 수산화칼슘을 규산칼슘 수화물로 전이시키는 활성도가 떨어져 내구성 및 고강도 발현이 어렵고, 50중량%를 초과하게 되면 고화제의 유동성을 급격히 떨어뜨려 시공성을 어렵게 하므로 상기 범위로 한정됨이 바람직하다.If the amount of the meta kaolin added is less than 30% by weight, the activity of transferring the calcium hydroxide produced by the hydration reaction to the calcium silicate hydrate is insufficient and durability and high strength And when it exceeds 50% by weight, the fluidity of the solidifying agent is rapidly lowered, which makes the workability difficult, and thus it is preferable to be limited to the above range.
또한, 알루민산소다(Sodium Aluminate)는 대표적인 알루미늄계 액상 급결제이로서, 보통 응집제(Coagulation Agent)로 많이 사용된다.In addition, sodium aluminate is a representative aluminum-based liquid-phase sizing agent, and is commonly used as a coagulation agent.
본 발명에서는 C12A7와의 상보성을 고려하여 2.5-6.5중량부의 범위로 첨가되어야 하는데, 2.5중량부 미만 첨가시에는 응집력이 떨어져 급결성을 저하시키고, 6.5중량부를 초과하면 과도한 응집에 따른 유동성 저하를 초래하므로 상기 범위로 첨가되어야 한다.In the present invention, in consideration of complementarity with C 12 A 7 , it should be added in the range of 2.5-6.5 parts by weight. When added in an amount of less than 2.5 parts by weight, the cohesive force is lowered to lower the floccability, and when it exceeds 6.5 parts by weight, And therefore should be added to the above range.
아울러, C12A7은 수냉된 비정질광물로서, 예컨대 칼슘알루미네이트계 비정질화물이다. 이러한 칼슘알루미네이트계 비정질화물인 C12A7은 속결성을 위해 첨가되는 물질로, 시멘트의 함수비를 낮추고 초기 강도를 높이게 되며, 특히 상기 C12A7은 인체에 대한 자극성과 해가 없고 유해성분 용출이 없어 친환경적인 소재라 할 수 있다.In addition, C 12 A 7 is a water-cooled amorphous mineral, such as a calcium aluminate amorphous material. The calcium aluminate-based amorphous material C 12 A 7 is added to accelerate the formation of the cement, thereby lowering the water content of the cement and increasing the initial strength. Particularly, the C 12 A 7 has no irritating properties against the human body, It is environment-friendly material because there is no leaching.
뿐만 아니라, 상기 C12A7은 알루미늄계 액상급결제인 알루민산소다(Sodium Aluminate)와 일정량 결합시 급결성을 더욱 높이고 안정성을 확보할 수 있다.In addition, when C 12 A 7 is bound to a sodium aluminate, which is an aluminum-based liquid-phase quick-setting filler, at a given amount, it is possible to further enhance the toughness and ensure stability.
따라서, 본 발명에서는 12~18중량%로 첨가됨이 바람직한데, 만약 12중량% 미만으로 첨가되면 함수비를 낮출 수 없어 급결성이 떨어지고, 18중량%를 초과하게 되면 유동성이 저하되어 시공성을 저해하므로 상기 범위로 한정되어야 한다.Therefore, in the present invention, it is preferable to add 12 to 18% by weight. If the amount is less than 12% by weight, the water content can not be lowered and the toughness is lowered. If it exceeds 18% by weight, Should be limited to the above range.
한편, PVA섬유는 OH- 그룹을 가지는 친수성물질로서, 본 발명에서는 포틀랜트 백시멘트와 다른 첨가물들의 결합을 위해 첨가된다.On the other hand, the PVA fiber is a hydrophilic substance having an OH-group, and is added in the present invention for bonding the portland back cement with other additives.
이러한 PVA 섬유는 보통 물리,화학적으로 우수한 접착성을 가지고 있고, 인장강도가 900~1600MPa를 가지므로 인장력과 내알칼리성을 요구하는 시멘트 콘크리트 보강재로 적합하다.These PVA fibers usually have good physical and chemical adhesion, and have a tensile strength of 900 to 1600 MPa, which makes them suitable as a cement concrete reinforcement requiring tensile strength and alkali resistance.
뿐만 아니라, 합성섬유 중에서 연소열이 가장 낮고 연소시 발생되는 가스에는 유해가스가 전혀 없으므로 친환경적이라 할 수 있다.In addition, since the combustion heat is the lowest in synthetic fibers and no harmful gas is present in the gas generated during combustion, it can be said to be environmentally friendly.
특히, 상기 PVA 섬유는 바인더이기도 하지만 섬유질이기 때문에 결합시 공극을 형성하며, 균열을 저감시키는 작용을 한다.Particularly, the PVA fiber is a binder, but since it is a fiber, it forms a void upon bonding and acts to reduce cracks.
때문에, 본 발명에서 투수성과 보수성을 고려하여 11-17중량부 포함시키는 것이 바람직하다.Therefore, it is preferable to include 11-17 parts by weight in consideration of water permeability and water retention in the present invention.
아울러, CSA클링커는 상온 경화를 위한 급결시 수화열을 낮춰 초기 강도 저하를 막고 시멘트의 조강성을 높이는데 기여하도록 6.1-12.8중량부의 범위 내에서 참가됨이 바람직하다.In addition, the CSA clinker preferably participates in the range of 6.1-12.8 parts by weight in order to lower the hydration heat at the time of quenching for room temperature curing to prevent the initial strength reduction and to enhance the rigidity of the cement.
즉, 상기 CSA클링거는 상온 경화성을 속결시켜 조강성을 높이는 일종의 혼화재이다. 따라서, 과량 첨가될 경우 유동성을 높여 조강성을 저해하므로 당연히 상기 범위로 유지되어야 한다.That is, the CSA clinger is a kind of admixture which accelerates the room temperature curing property to enhance the torsional rigidity. Therefore, if excess amount is added, the fluidity is increased to impair the torsional rigidity.
그리고, BA는 부드러운 성질의 고분자 합성에 이용되며, 도료, 접착제 등으로 활용되는 수지로서, 본 발명에서는 접착성 향상 및 크랙 방지를 위해 첨가되며, 15중량% 미만으로 첨가되면 크랙이 생겨나고, 25중량%를 초과하여 첨가되면 태키 발생이 심해지므로 성형성 및 가공성을 떨어뜨리므로 상기 범위로 첨가되어야 한다.BA is used for synthesis of a polymer having a soft property and is used as a paint or an adhesive. In the present invention, it is added to improve adhesion and prevent cracking. When added at less than 15% by weight, cracks are generated. If it is added in an amount exceeding the above amount by weight, tackiness is increased, and therefore, the formability and workability are deteriorated.
마지막으로, 파라핀 왁스는 공기중 산소 유입 차단효과를 얻어 경화 촉진을 유도하고, 태키성 감소를 위해 첨가되는데, 7중량% 미만으로 첨가하면 공기중 산소 유입 차단효과가 떨어져 속건성이 급격히 나빠질 뿐만 아니라 태키 개선효과가 없고, 16중량%를 초과하여 첨가하면 점착성이 너무 커져 경화가 지연될 뿐만 아니라 경화 후에도 이물 묻음 현상이 유발되므로 상기 범위로 한정하여야 한다.Finally, the paraffin wax has an effect of blocking oxygen inflow in the air to induce curing acceleration and is added to reduce tackiness. When added at less than 7% by weight, paraffin wax becomes less effective in blocking oxygen inflow in the air, There is no improvement effect. If it is added in an amount exceeding 16% by weight, the tackiness becomes too large and the curing is delayed.
상술한 조성물을 이용하여 본 발명에 따른 급결성이 우수한 경량기포콘크리트 제조방법은 기포제 희석단계, 1차 혼합단계, 기포제와 1차 혼합물 교반단계, 2차 혼합단계, 상온 경화 촉진단계를 포함하여 이루어진다.The method for producing a lightweight foamed concrete having excellent storability according to the present invention using the above-mentioned composition comprises a foaming dilution step, a primary mixing step, a foaming agent and a primary mixture mixing step, a secondary mixing step and a room temperature hardening promotion step .
이때, 상기 기포제 희석단계는 상기 라우릴황산나트륨을 물에 희석시키는 단계로서, 물과 라우릴황산나트륨을 1:2의 부피비로 희석하는 단계이다.At this time, the foaming dilution step is a step of diluting the sodium lauryl sulfate with water, and diluting water and sodium lauryl sulfate at a ratio of 1: 2 by volume.
그러면, 적정비율로 희석됨으로써 과발포를 막을 수 있다.Then, it can be prevented from overfilling by being diluted at a proper ratio.
그리고, 상기 1차 혼합단계는 포틀랜트시멘트와 메타카올린, C12A7, 그리고 PVA섬유를 먼저 혼합하는 단계로서, 50-70rpm으로 저속 교반하여 포틀랜트시멘트와 PVA섬유 사이의 공극으로 완전히 침투할 수 있도록 하기 위함이다.The primary mixing step is a step of mixing portland cement, meta-kaolin, C 12 A 7 , and PVA fibers in advance, and stirring at a low speed of 50-70 rpm to completely penetrate into the gap between the portland cement and the PVA fiber In order to make it possible.
아울러, 상기 기포제와 1차 혼합물 교반단계는 상기 1차 혼합단계를 통해 혼합 교반된 1차 혼합물을 기포제에 투입하여 발포에 따른 기포가 소포되지 않으면서 균일하게 혼합될 수 있도록 하는 단계이다.In addition, in the step of mixing the foaming agent and the primary mixture, the primary mixture, which is mixed and stirred through the primary mixing step, is injected into the foaming agent so that bubbles are uniformly mixed without bubbling.
이 경우에도 저속교반이 원칙이며, 다만 교반 속도를 50rpm 부근으로 맞춰 유지함이 바람직한데, 이는 기포의 소포 현상을 최소화하기 위함이다.In this case, too, low-speed agitation is a principle, but it is preferable to keep the agitation speed near 50 rpm in order to minimize the bubble fogging phenomenon.
상기 2차 혼합단계는 기포제가 균일하게 혼합분산된 혼합물에 BA를 첨가하여 혼합물의 점성을 높임으로써 크랙 방지 및 접착성을 향상시키기 위한 단계이며, 이또한 50-70rpm의 범위 내에서 저속교반되어야 한다.The secondary mixing step is a step for increasing the viscosity of the mixture by adding BA to the mixture in which the foaming agent is uniformly mixed and dispersed to thereby improve the crack prevention and the adhesion, and it should be stirred at a low speed within the range of 50-70 rpm .
또한, 상기 상온 경화 촉진단계는 상온 경화성을 높이면서 급결성을 완료하기 위해 CAS클링커와 파라믹왁스를 동시에 첨가하면서 상술한 저속 교반속도에 비해 상대적으로 2배 이상 고속인 220-250rpm으로 교반하여 급결 촉진성을 갖는 성분들이 신속하게 분산되도록 유도하는 단계이다.In addition, in the step of accelerating the room temperature curing, the CAS clinker and the paramyx wax are simultaneously added to complete the tackiness while increasing the room temperature hardening property, and stirring is performed at 220-250 rpm, which is twice as high as the above- And inducing the components having promotability to be quickly dispersed.
이러한 과정을 거쳐 제조된 급결성이 우수한 경량기포콘크리트는 현장 타설 직전에 콘크리트 믹서 상에서 즉시 제조되는 것이 바람직하며, 타설 후 수시간 내에 상온 경화되므로 공사기간을 단축하고, 태키성이 거의 없어 후속 공정을 진행하기 편리하며, 원가 및 인건비를 절감하고, 시공의 용이성을 달성하는 장점을 얻을 수 있게 된다.It is preferable that the lightweight foamed concrete produced by such a process has excellent quick-setting property immediately on the concrete mixer immediately before the casting, and since it hardens at room temperature within several hours after the casting, the construction period is shortened, It is advantageous to proceed, to reduce cost and labor costs, and to achieve ease of installation.
이하, 실시예에 대하여 설명한다.Hereinafter, examples will be described.
[실시예][Example]
본 발명에 따른 급결성이 우수한 경량기포콘크리트의 특성을 확인하기 위하여 상술한 성분조성비와 제조방법을 통해 테스트용 시료를 제조하였다.In order to confirm the characteristics of the lightweight foamed concrete excellent in quick-spreading property according to the present invention, a test sample was prepared through the composition ratio and the manufacturing method described above.
이때, 제조된 시료는 하기 표 1에 나타난 발명재1,2,3과 같이 조성하였으며, 비교대상인 기존재는 앞서 설명한 등록특허 제0760039호에서 기재하고 있는 실시예들 중 실시예2를 채택하여 비교하였다.The prepared samples were prepared as Inventive materials 1, 2, and 3 shown in the following Table 1, and the existing materials to be compared were compared with each other by adopting Example 2 of the embodiments described in the above-mentioned Patent No. 0760039 .
섬유PVA
fiber
클링커CSA
Clinker
왁스Parapect
Wax
발명재1
Inventory 1
중량부100
Weight portion
중량부2.5
Weight portion
중량부35
Weight portion
중량부4
Weight portion
중량부12
Weight portion
중량부15.5
Weight portion
중량부7
Weight portion
중량부20
Weight portion
중량부10
Weight portion
발명재2
Inventory 2
중량부100
Weight portion
중량부5
Weight portion
중량부40
Weight portion
중량부5
Weight portion
중량부15
Weight portion
중량부14.5
Weight portion
중량부10
Weight portion
중량부17
Weight portion
중량부11
Weight portion
발명재3
Inventory 3
중량부100
Weight portion
중량부9
Weight portion
중량부45
Weight portion
중량부6
Weight portion
중량부17
Weight portion
중량부17.5
Weight portion
중량부12
Weight portion
중량부18
Weight portion
중량부10
Weight portion
(상기 표 1에서 성분조성비는 기본성분인 포틀랜트시멘트 100중량부에 대한 나머지 성분들의 상대적인 혼합비이다.)(The component composition ratio in Table 1 is the relative mixing ratio of the remaining components to 100 parts by weight of the portland cement, which is the basic component.)
상기 표 1과 같이 조성된 조성물을 이용하여 상술한 본 발명에 따라 경량기포콘크리트 시료(발명재1,발명재2,발명재3)를 제작한 후 기존재와 동일하게 상온에 방치하여 경화시켰다.Lightweight foamed concrete samples (Invention Material 1, Invention Material 2, and Invention Material 3) were prepared according to the present invention using the composition as shown in Table 1, and then left to stand at room temperature for curing.
이때, 경화에 걸리는 시간(초결시간으로 비교함)과 경화 후 압축강도, 단열성능 및 밀도를 확인하여 기존재와 비교하였으며, 그 결과는 표 2에 나타내었다.At this time, the time required for curing (compared with the time of the shortest time), the compressive strength after hardening, the heat insulating performance and the density were checked and compared with the presence of the cured product.
(kg/㎠)Compressive strength
(kg / cm2)
(kcal/mh℃)Insulation performance
(kcal / mh)
(g/㎤)density
(g / cm3)
상기 표 2에서와 같이, 본 발명에 따라 제조된 경량기포시멘트가 기존대 대비 동등 이상의 급결성을 가짐을 확인할 수 있었고, 압축강도 및 단열성능, 밀도 등에 있어서도 동등 이상의 특성을 가지고 있는 것으로 확인되었다.As shown in Table 2, it was confirmed that the lightweight foamed cement produced according to the present invention had a toughness equal to or higher than that of the existing tough cement, and it was confirmed that the tough cement had the same or higher characteristics in terms of compressive strength, heat insulation performance and density.
따라서, 본 발명에 따른 경량기포시멘트는 당해 분야에서 충분히 활용될 수 있음을 확인할 수 있었다.Therefore, it has been confirmed that the lightweight foamed cement according to the present invention can be fully utilized in the art.
이에 더하여, 친환경성 측정항목으로 유해물질 용출시험을 실시하여 유해성 여부도 테스트 하였으며, 용출시험은 환경부에서 정한 폐기물 공정시험법에 따라 진행하였고, 그 결과를 표 3에 나타내었다.In addition, hazardous substances were also tested for the environmentally friendly substances, and the dissolution test was carried out according to the waste process test method set by the Ministry of Environment. The results are shown in Table 3.
우려기준
-Cr6+:4이하
Soil pollution
Criteria of Concern
-Cr 6+ : not more than 4
물질
용출량
(mg/L)harmfulness
matter
Amount of elution
(mg / L)
상기 표 3에서와 같이, 본 발명에 따른 경량기포콘크리트는 기존재 대비 Cr6+가 낮고, 유해물질이 방출되지 않으므로 인체 유해성 측면에서도 보다 친환경적이기 때문에 당해 분야에서 매우 유용하게 활용될 수 있을 것으로 기대된다.As shown in Table 3, since the lightweight foamed concrete according to the present invention is low in Cr 6+ relative to the presence of the earth and does not release harmful substances, it is expected to be very useful in the related art since it is more environmentally friendly do.
Claims (3)
물과 라우릴황산나트륨을 1:2의 부피비로 희석하는 기포제 희석단계;
포틀랜트시멘트와 메타카올린, C12A7, PVA섬유를 상기 조성비 내에서 교반기에 넣고, 교반하여 포틀랜트시멘트와 PVA섬유 사이의 공극으로 메타카올린, C12A7, PVA섬유가 완전히 침투할 수 있도록 분산 혼합시키는 1차 혼합단계;
1차 혼합된 혼합물을 상기 조성비 범위로 유지되는 기포제에 투입하여 발포에 따른 기포가 소포되지 않으면서 균일하게 혼합될 수 있도록 하는 기포제와 1차 혼합물 교반단계;
기포제가 균일하게 혼합분산된 혼합물에 BA를 첨가하여 혼합물의 점성을 높이는 2차 혼합단계;
2차 혼합된 혼합물에 CAS클링커와 파라믹왁스를 동시에 첨가하면서 상기 1차 교반속도 보다 상대적으로 2배 이상 빠른 속도로 교반하여 급결 촉진성을 갖는 성분들이 신속하게 분산되도록 유도하는 상온 경화 촉진단계;를 포함하는 것을 특징으로 하는 급결성이 우수한 경량기포콘크리트 제조방법.
A mixture of 2.4-9.2 parts by weight of sodium laurylsulfate, 30-50 parts by weight of meta-kaolin, 2.5-6.5 parts by weight of sodium aluminate, 12 parts by weight of C 12 A 7, 12 parts by weight of polyvinyl alcohol (PVA) based on 100 parts by weight of portent cement as a main component, Alcohol fiber, 6.1-12.8 parts by weight of CSA (calcium sulfate-aluminate) clinker, 15-25 parts by weight of BA (buthyl acrylate) and 7-16 parts by weight of paraffin wax, In this excellent lightweight foamed concrete manufacturing method,
A foaming dilution step of diluting water and sodium lauryl sulfate in a volume ratio of 1: 2;
The mixture of portland cement, meta-kaolin, C 12 A 7 , and PVA fibers was placed in a mixer with the above composition ratio, and stirred to complete penetration of meta-kaolin, C 12 A 7 and PVA fibers into the gap between the portland cement and the PVA fiber A first mixing step of dispersing and mixing the mixture;
Mixing the first mixed mixture into a foaming agent maintained in the composition ratio range so that the foaming agent can be uniformly mixed without foaming the foams;
A secondary mixing step in which BA is added to the mixture in which the foaming agent is uniformly mixed and dispersed to increase the viscosity of the mixture;
Mixing the CAS clinker and the paramic wax simultaneously with the secondary mixed mixture while stirring the mixture at a rate two times higher than the primary stirring speed so as to rapidly disperse the components having accelerated promotability; The method for manufacturing a lightweight foamed concrete according to claim 1,
상기 기포제 희석단계에서, 발포성 향상을 위해 상기 라우릴황산나트륨이 첨가되는 조성비의 범위 내에서 과붕산나트륨을 라우릴황산나트륨과 1:0.5의 부피비로 혼합하여 더 첨가하는 것을 특징으로 급결성이 우수한 경량기포콘크리트 제조방법.
The method of claim 1,
In the foaming dilution step, sodium perborate is mixed with sodium lauryl sulfate in a volume ratio of 1: 0.5 in the range of the composition ratio in which the sodium lauryl sulfate is added in order to improve the foaming property. Concrete manufacturing method.
상기 1차 혼합단계에서는 50-70rpm으로 교반하고, 상기 상온 경화 촉진단계에서는 220-250rpm으로 교반하는 것을 특징으로 하는 급결성이 우수한 경량기포콘크리트 제조방법.The method of claim 1,
Wherein the mixture is stirred at 50-70 rpm in the primary mixing step and stirred at 220-250 rpm in the room temperature curing promotion step.
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| KR101573028B1 (en) * | 2015-04-28 | 2015-11-30 | 이호준 | Packing method using a lightweight cellular concrete permeability good |
| KR102468577B1 (en) * | 2022-01-20 | 2022-11-21 | 주식회사 솔패이브 | Eco-friendly self-healing lightweight bubble grouting composition and preparation method thereof |
| KR20230086613A (en) | 2021-12-07 | 2023-06-15 | 최선미 | lightweight foam concrete composition and method for menufacturing the same |
| KR102642669B1 (en) * | 2023-08-21 | 2024-03-04 | (주)에스씨엠금영 | Grouting composition for eco-friendly ground injection |
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| KR100955621B1 (en) | 2009-04-01 | 2010-05-03 | 에스이엠 주식회사 | Manufacture method of ceramic foam which superior to insulating effect by using by waste and natural gypsum |
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| KR101573028B1 (en) * | 2015-04-28 | 2015-11-30 | 이호준 | Packing method using a lightweight cellular concrete permeability good |
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