KR970001045B1 - Process for the preparation of water-repellent light-weight concrete for sound absorption - Google Patents

Process for the preparation of water-repellent light-weight concrete for sound absorption Download PDF

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KR970001045B1
KR970001045B1 KR1019940010740A KR19940010740A KR970001045B1 KR 970001045 B1 KR970001045 B1 KR 970001045B1 KR 1019940010740 A KR1019940010740 A KR 1019940010740A KR 19940010740 A KR19940010740 A KR 19940010740A KR 970001045 B1 KR970001045 B1 KR 970001045B1
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water
sound absorbing
repellent
absorbing material
stirring
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KR950031980A (en
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엄태선
이동윤
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쌍용양회공업 주식회사
우덕창
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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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • 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
    • C04B14/34—Metals, e.g. ferro-silicon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/282—Polyurethanes; Polyisocyanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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    • 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
    • C04B40/02—Selection of the hardening environment
    • 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
    • C04B2103/20—Retarders
    • 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
    • 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
    • C04B2103/60—Agents for protection against chemical, physical or biological attack
    • C04B2103/65—Water proofers or repellants
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • 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
    • 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
    • C04B2111/52—Sound-insulating materials
    • 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
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    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Inorganic Chemistry (AREA)
  • Building Environments (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Porous Artificial Stone Or Porous Ceramic Products (AREA)

Abstract

The acoustic absorber having water resistance and fireproofness was prepared by the following steps; 1) 0.4- 0.6 wt.% of an animal protein base, 0.05- 0.01 wt.% of an aluminium powder and hydroxycarboxylic surfactants were mixed in water, and stirred firstly at 3- 8 m/sec of linear velocities for 60- 90 seconds in a foam generating stirrer, 2) stirred secondly adding calcium hydroxide, alumina cement, silica sand, gypsum, citric acid, cement, urethane resin, adjusted to 20- 40 minutes of setting time, cured by a humid air at 20+-5 deg.C for 24 hours, and followed by surface treatment with a silicone oil water repellent.

Description

초경량 발수콘크리트 흡음재의 제조방법Manufacturing method of ultra light water repellent concrete sound absorbing material

본 발명은 초경량 발수콘크리트 흡음재의 제조방법에 관한 것으로, 더욱 상세하게는 내수성과 내화성이 우수하며 형상유지력이 있어 재료와 시공단가가 매우 저렴한 고강도 초경량 발수콘크리트 흡음재의 제조방법에 관한 것이다.The present invention relates to a method for producing an ultralight water-repellent concrete sound absorbing material, and more particularly, to a method for producing a high strength ultra-light water-repellent concrete sound absorbing material having excellent water resistance and fire resistance, and having low shape and material cost.

자동차 궤도, 항공기, 공장, 건설 등으로 인한 소음으로 대별되는 각종 소음공해는 임체의 감각기관을 자극하여 청력감퇴, 심리적 불안 등을 야기시키므로써, 근로나 주거환경에 중요한 문제가 되고 있다.Various noise pollutions, which are classified as noises caused by car tracks, aircrafts, factories, and constructions, are stimulating sensory organs of the pregnant woman, causing hearing loss and psychological anxiety, which are important problems in working and living environments.

이러한 소음공해를 차단하고 감쇄시킬 목적으로 차음벽제나 흡음재를 시공하여 작업환경이나 주거환경을 개선하고 있으나, 최근에는 입사음을 그대로 흡수 소멸하고 감쇄시켜 반사소음이 반대편의 환경에 영향을 주지 않는 흡음재의 시공이 선호되고 있다.In order to block and attenuate the noise pollution, sound wall or sound absorbing material is installed to improve the working environment and living environment.However, recently, the absorbed sound is absorbed and attenuated and attenuated so that the reflected noise does not affect the environment on the other side. Construction is preferred.

종래에 사용된 흡음재의 종류로는 비강체특성을 갖는 유리솜, 암면 또는 유기질계 흡음재 등이 있는데, 이런 소재는 자체의 형성유지력이 없어서 흡음강판에 삽입해 시공해야 하므로 시공단가가 비싸고 우수 등의 내후성과 내화성이 취약하며 섬유비산 때문에 진동이 심한 기계설, 정밀계측실험실 등에 사용할 경우 기계의 유지 및 보수가 빈번히 요구되어 부적합하였다.Types of sound absorbing materials conventionally used include glass wool, rock wool or organic sound absorbing materials having non-rigid properties. Such materials do not have their own formation and retention force, so they need to be inserted into sound absorbing steel sheets and thus have high construction cost and excellent weather resistance. It is inadequate due to the frequent maintenance and repair of the machine when it is used in mechanical installations, precision measurement laboratories, etc., where vibration and fire resistance are weak and fiber scattering is severe.

한편, 경량 기포 콘크리트는 상기한 바와 같은 소재들의 결점을 다소 해결할 수는 있으나, 경량 기포 콘크리트 내부의 기포가 대부분 독립적으로 존재하여 입사음에 대한 흡음성을 발휘하지 못하므로 흡음재로의 사용이 곤란하였다. 따라서, 이러한 경량 기포 콘크리트에 흡음재로써의 특성과 기능을 부여하기 위해서는 경량 기포 콘크리트의 초대 비중이 0.4 이하이어야 하고, 독립기포를 연결기포로 전환시켜 입사소음이 연결기포를 통해 전파되어 벽과의 마찰이나 점선저항 및, 재료의 섬유질 결정조직의 진동운동 등에 의해 열에너지로 변화되므로써 입사음이 흡음되도록 특성을 개질하고제어하는 기술이 요구된다.On the other hand, lightweight foam concrete can solve some of the drawbacks of the materials as described above, but because the air bubbles inside the lightweight foam concrete is mostly independent, it is difficult to use as a sound absorbing material because it does not exhibit sound absorption for incident sound. Therefore, in order to give characteristics and functions as sound absorbing material to the lightweight foamed concrete, the primary specific gravity of the lightweight foamed concrete should be 0.4 or less, and the incident noise is propagated through the connecting bubble to friction with the wall by converting the independent bubble into the connecting bubble. However, there is a need for a technique for modifying and controlling characteristics so that incident sound is absorbed by being changed into thermal energy due to the dotted line resistance and the vibrational motion of the fibrous crystal structure of the material.

이와 같이, 초경량 콘크리트 흡음재의 제조를 위한 기본적인 특성으로는 초경량화(비중 0.25∼0.4), 기포의 상호연결, 시공·운반 및 형성유지력을 갖는 최소강도와 내후성 등이 요구되는데, 일본 공개특허 제52-37403호에는 이러한 제조법으로 제안된 관련기술이 기재되어 있다. 상기 발명에 따르면 기포제로써 동물성 단백질 기포제를 사용하는 것은 초경량화의 한계와 함께 연결기포의 확보가 곤란할 뿐만 아니라 강도 저조(2∼3kg/cm2), 파포현상의 가속 및 균질분산성이 저조해 흡음재룡 기포제로 설폰산염형 음이온계 계면활성제 또는 황산 에스테르염형 음이온계 계면활성제와 같은 특수 기포제를 함께 사용하였으며, 동물성 단백질 기포제를 사용하였을 경우, 요구물성과 흡음성능 확보가 곤란하다는 것을 실시예에서 보고하고 있다.As such, the basic characteristics for the production of ultra-lightweight concrete sound absorbing materials are required to be ultra-lightweight (specific gravity 0.25-0.4), interconnection of bubbles, minimum strength and weather resistance having construction and transportation, and formation holding force, etc. -37403 describes related techniques proposed by this preparation. According to the present invention, the use of animal protein foaming agent as a foaming agent is not only difficult to secure connection bubbles with the limitation of ultra-lightening, but also low strength ( 2 ~ 3kg / cm 2 ), acceleration of the breakage phenomenon and low homogeneous dispersion, sound absorbing material It was reported in the examples that it was difficult to secure the required properties and sound absorption performance when using a special foaming agent such as sulfonate type anionic surfactant or sulfuric acid ester salt type anionic surfactant as the air blowing agent. have.

또한, 일본 공개특허 제56-16075호에서는 무기질 다공체의 방음층과 중량이 큰 차음층을 갖는 방음용 합성 2중 판넬의 제조방법을 제안하였고, 일본 공개특허 제60-149287호에서는 평균입경 0.5∼3mm의 연화나 화강암의 분쇄물을 첨가하여 복합소재화된 흡음재를 제조하는 등, 흡음재 제조를 위한 다양한 기술이 검토되고 있다.In addition, Japanese Patent Application Laid-Open No. 56-16075 proposed a method for manufacturing a synthetic double panel for soundproofing having a soundproofing layer of an inorganic porous body and a large soundproofing layer, and in Japanese Laid-Open Patent Publication No. 60-149287, the average particle diameter of 0.5 to Various techniques for the production of sound absorbing materials, such as softening of 3 mm and granulated crushed granite, are added to produce composite material sound absorbing materials.

본 발명자들은 상기한 바와 같은 종래의 경량 기포 콘크리트 흡음재의 문제점들을 해결하고 흡음성이 우수한 초경량 발수콘크리트 흡음재를 제공하기 위해 예의 연구한 결과, 본 발명에 이르게 되었다.The present inventors have made intensive studies to solve the problems of the conventional lightweight foamed concrete sound absorbing material as described above and to provide an ultra-light water-repellent concrete sound absorbing material excellent in sound absorption.

본 발명의 목적은 기포 콘크리트를 기본 소재로 하는 초경량 발수콘크리트흡음재의 제조방법을 제공하는 것이다.It is an object of the present invention to provide a method for producing a super lightweight water-repellent concrete sound absorbing material based on aerated concrete.

또한, 본 발명의 목적은 섬유질계의 흡음재와 비교하여 동등이상의 흡음성을 갖고 내수성과 내화성이 우수하며 형상유지력이 있어 재료와 시공단가가 매우 저렴한 고강도 초경량 발수콘크리트 흡음재를 제공하는 것이다.In addition, it is an object of the present invention to provide a high-strength lightweight water-repellent concrete sound-absorbing material having a sound absorption of equivalent or more compared with a fibrous sound-absorbing material, excellent water resistance and fire resistance, and a very low cost material and construction cost.

이하, 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail.

본 발명은 동물성 단백질 기포제, 알루미늄분말, 공기연행 감수지연제를 물과 혼합하여 기포발생 교반기에서 3 내지 8m/초의 선속도로 1차 교반하고, 응결시간이 20 내지 40분 이내로 조절된 소석회, 알루미나시멘트, 규사, 석고, 구연산, 1종 시멘트, 우레탄 수지를 첨가하여 2차 교반하고, 20±5℃ 범위에서 24시간 이내로 습공경화하여 고온고압 양생처리한 후, 실리콘 오일계 발수계로 표면처리하는 것임을 특징으로 하는 초경량 발수콘크리트 흡음재의 제조방법인 것이다.The present invention mixes animal protein foaming agent, aluminum powder, air-resisting delaying agent with water, and stirs at a linear velocity of 3 to 8 m / sec in a bubble-generating stirrer, and the setting time is 20 to 40 minutes. Secondary agitation with cement, silica sand, gypsum, citric acid, one cement and urethane resin, wet hardening within 20 hours at 20 ± 5 ℃, curing at high temperature and high pressure, and then surface treating with silicone oil-based water-repellent system It is a method of manufacturing a super lightweight water-repellent concrete sound absorbing material, characterized in that.

이하, 본 발명을 더욱 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in more detail.

본 발명에 따른 초경량 발수콘크리트 흡음재는, 기포 생성을 위한 출발 물질로 동물성 단백질 기포제를 사용하고, 생성기포를 연결화하기 위하여 알루미늄분말과 콘크리트의 공기연행 감수지연제(히드록시카본산염계의 계면활성제)를 함께 사용하고 저주파 흡음성능과 형상유지강도의 증진을 위해 주요 생성기포의 크기를 300∼800㎛가 되도록 교반기의 선속도를 3∼8m/초로 조정하고, 시공·운반 및 실외시공에 있어서 내구(후)성 증진을 위해 열중합수지를 첨가하고 발수제로 표면코팅하여 제조된다.The ultra-light water-repellent concrete sound absorbing material according to the present invention uses an animal protein foaming agent as a starting material for bubble generation, and is an airborne water-retardant delay agent (hydroxycarbonate-based surfactant) of aluminum powder and concrete in order to connect the generated bubbles. ), And the linear speed of the stirrer is adjusted to 3-8m / sec so that the main bubble is 300 ~ 800㎛ in order to improve low frequency sound absorption performance and shape retention strength, and it is durable in construction, transportation and outdoor construction. It is manufactured by adding thermal polymer resin and surface coating with water-repellent agent in order to improve (after) property.

본 발명에 따르면 동물성 단백질 기포제와 알루미늄분말, 공기연행 감수지연제가 함께 사용되는데, 동물성 단백질 기포제를 단독 사용할 경우 기포의 연결화를 도모하기 곤란할 뿐만 아니라, 강도와 기포 분산성이 저조하고, 알루키늄분말을 단독 사용하는 경우에는 생성된 기포가 기포의 연결화 과정에서 발생된 수소기체로 외부로 방출되므로써 미경화 원료의 슬러리가 꺼짐현사이 크게 발생되어 연결기포화가 어렵다.According to the present invention, an animal protein foaming agent, an aluminum powder, and an air-retardant delay agent are used together, and when the animal protein foaming agent is used alone, it is difficult to promote the connection of the bubbles, and the strength and bubble dispersibility are low. In the case of using the powder alone, the generated bubbles are released to the hydrogen gas generated in the process of connecting the bubbles to the outside, so that the slurry of the uncured raw material is greatly generated between the off strings, making it difficult to connect the bubbles.

본 발명의 방법에 있어서, 동물성 단백질 기포제는 총고형분에 대하여 0.4 내지 0.6중량%를 사용하고, 알루미늄분말은 총고형분에 대하여 0.005 내지 0.01중량%를 사용하는 것이 바람직하다.In the method of the present invention, the animal protein foaming agent is preferably 0.4 to 0.6% by weight based on the total solids, and 0.005 to 0.01% by weight of the aluminum powder relative to the total solids.

또한, 기포를 시간차로 생성하고, 생성된 기포가 연결화되는 과정에서 기포 콘크리트 제조용 조합 원료의 슬러리가 경화되고 자중을 지지할 수 있는 기본 뼈대 형성에 조정이 필요하고, 초경량을 위한 과량의 기포 혼입이 작업성을 극도로 저하하므로 기포의 균질분산과 적정 작업성 확보 및 혼합시간의 조정이 요구되었다.In addition, in the process of generating bubbles in time, the resulting bubbles are connected, the slurry of the composite raw material for producing foam concrete is cured, and adjustment is necessary to form a basic skeleton capable of supporting its own weight, and mixing of excess bubbles for ultra-light weight Since this workability was extremely degraded, homogeneous dispersion of bubbles, ensuring proper workability and adjusting of mixing time were required.

따라서, 본 발명에서는 교반기의 선속도를 3∼8mm/초로 제한하고 교반시간을 90초 이내, 바람직하기로는 60 내지 90초 이내로 하여 공기연행 감지지연제를 첨가하므로써 300 내지 800㎛의 기포가 균질분산되었고 필요한 작업성이 확보되었다.Therefore, in the present invention, by limiting the linear speed of the stirrer to 3 to 8mm / second and the stirring time within 90 seconds, preferably within 60 to 90 seconds, by adding an air entrainment delay agent, bubbles of 300 to 800 µm are homogeneously dispersed. And required workability was secured.

상기와 같이 교반기의 선속도를 3 내지 8m/초로 하고 교반시간을 90초이내로 할 경우 연결기포의 크기를 300∼800㎛로 제한할 수 있으며, 이런 크기를 가지는 기포는 특히 125 내지 800Hz의 저주파 음역에 대한 흡음 성능이 우수하고 또한 소재의 형상 유지 강도가 증진된다.As described above, when the linear speed of the stirrer is set to 3 to 8 m / sec and the stirring time is set to 90 seconds or less, the size of the connecting bubble can be limited to 300 to 800 μm, and bubbles having such a size are particularly low frequency range of 125 to 800 Hz. Excellent sound absorption performance and the shape retention strength of the material is improved.

또한, 교반시간이 90초를 넘을 경우 기포이 미세화 및 균질화는 향상되나, 발생기포의 포막강도가 약해져 파포 현상이 심각하게 발생되고, 또한 원료 슬러리의 경화 조정이 매우 어려워지게 된다.In addition, when the stirring time exceeds 90 seconds, bubbles are refined and homogenized, but the foaming strength of the generated bubbles is weakened, so that a blister phenomenon occurs seriously, and the curing of the raw material slurry becomes very difficult.

본 발명의 방법에 있어서, 1차 교반과 2차 교반 시간은 총 180초 이내로 실시하는 것이 바람직하다.In the method of the present invention, the first and second stirring times are preferably performed within a total of 180 seconds.

본 발명에서는 기포 콘크리트 원료 슬러리의 응결시간을 조절하기 위해, 예를들면 물유리, 알루미나시멘트, 초속경시멘트, 분말형 급결제 등의 급결제와 응결지연제를 병용하여 경화를 20 내지 40분으로 조절할 수 있다.In the present invention, in order to control the setting time of the foam concrete raw material slurry, for example, water curing, alumina cement, cemented carbide, powder type fasteners and the like used in combination with the coagulant delaying agent to adjust the curing to 20 to 40 minutes Can be.

상기 방법에 따라 제조된 그린케이크(Green Cake, 경화된 원료의 구체)를 오토클래이브 양생하면 고온고압형 규산칼슘 또는 규산칼슘 알루미네이트 수화물이 생성되지만, 이 소재는 초경량성 및 기포의 연결화로 인해 표면 강도가 적을 뿐 아니라 수분의 침투성이 매우 크기 때문에 본 발명에서는 원료슬러리에 열중합형 개질 우레탄계 수지를 총고형분에 대하여 약 0.1 내지 2중량%를 첨가하여 20±5℃ 범위에서 24시간 이내로 습공경화후 고온고압 양생하는 방법과 고온고압 양생후에 침투성 실리콘 오일계의 발수계를 이용하여 표면 코팅하는 방법으로 특성을 개질하였다.Autoclave curing of Green Cake (cured sphere of cured raw material) prepared according to the above method produces high temperature and high pressure calcium silicate or calcium silicate aluminate hydrate, but the material is super lightweight and due to the connection of bubbles In addition to having a low surface strength and a very high water permeability, the present invention adds about 0.1 to 2% by weight of a thermopolymer-modified urethane-based resin to the total solids, and then wets it within 24 hours at 20 ± 5 ° C. After the high temperature and high pressure curing, the properties were modified by surface coating using a water-repellent system of permeable silicone oil after high temperature and high pressure curing.

이때, 소재의 강도와 흡음력의 저하를 최소화하는 것이 필요한데, 침투성 실리콘 오일계의 발수제를 사용할 경우는 흡수율을 10% 이하로 제한하고, 코팅두께는 20㎛ 이하로 제한해야 한다. 또한, 열중합수지는 수화반응이 완료되는 온도와 시간에서 열중합이 시작되는 중합온도가 170 내지 190℃인 내알카리성 열중합수지, 예를 들면 우레탄계 수지를 사용하여 고온고압 양생과정에서 원료슬러리에 첨가한다.At this time, it is necessary to minimize the degradation of the strength and sound absorption of the material, when using a permeable silicone oil-based water-repellent agent to limit the water absorption to 10% or less, the coating thickness should be limited to 20㎛ or less. In addition, the thermal polymerization resin is added to the raw material slurry in the high temperature and high pressure curing process using an alkali-resistant thermopolymer, for example, a urethane-based resin having a polymerization temperature of 170 to 190 ° C. at the temperature and time at which the hydration reaction is completed. do.

본 발명에 의해 제조된 초경량 발수콘크리트 흡음재는 섬유질계의 흡음재와 비교하여 동등 이상의 흡음성을 갖고 내수성과 내화성이 우수하며, 형상 유지력이 있어 재료와 시공단가가 매우 저렴한 고강도 초경량 발수콘크리트 흡임재로써의 적용성이 우수하였다.The ultra-light water-repellent concrete sound absorbing material produced by the present invention is applied as a high strength ultra-light water-repellent concrete absorbing material having a sound absorption and fire resistance that is equal to or higher than that of a fibrous sound absorbing material, having excellent shape retention ability, and having a very low material and cost. The castle was excellent.

이하, 실시예에 의하여 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to Examples.

실시예 1Example 1

표 1에 기재한 양에 따라, 소뼈를 가수분해 처리하여 제조한 동물성 단백질 기포제(한국산업(주) 제품), 알루미늄 분말 및 공기연행(AE) 감수지연제(히드록시카본산염계의 계면활성제(태영화학 제품))를 취하여 물과 혼합하고, 기포발생 교반기에서 4m/초의 선속도로 90초 동안 교반하여 기포를 발생하였다. 여기에 알루미나 시멘트(유니온 시멘트사 제품), 규사, 석고, 소석회, 구연산, 1종 시멘트 등을 첨가하여 다시 4m/초의 선속도로 75초간 혼합하였다.According to the amounts shown in Table 1, animal protein foaming agent (product of Korea Industrial Co., Ltd.), aluminum powder and air entrained (AE) water retardant (hydroxycarbonate-based surfactant) Taeyoung Chemical Co., Ltd.) was taken, mixed with water, and stirred in a bubble generating stirrer at a linear speed of 4 m / sec for 90 seconds to generate bubbles. Alumina cement (manufactured by Union Cement Co., Ltd.), silica sand, gypsum, slaked lime, citric acid, and one kind of cement were added thereto and mixed for another 75 seconds at a linear speed of 4 m / sec.

상기 혼합물을 20℃에서 12시간 동안 습공양생한 후, 12기압의 포화수증기압에서 7시간 동안 고온고압 양생하였다.The mixture was wet cured at 20 ° C. for 12 hours, followed by high temperature and high pressure curing at 12 atmospheres of saturated steam for 7 hours.

얻어진 제품들에 대하여 물성과 수직입사법(ISO 3743)에 따른 흡음율, 발수성을 측정하고, 그 결과를 표 2에 기재하였다.For the obtained products, the physical properties, sound absorption rate and water repellency according to the vertical incidence method (ISO 3743) were measured, and the results are shown in Table 2.

실시예 2 내지 4Examples 2-4

사용된 성분 및 합량을 표 1에 기재된 바와 같이 실시한 것을 제외하고 실시예 1의 방법과 동일한 방법으로 흡음재를 제조하였다.A sound absorbing material was prepared in the same manner as in Example 1 except that the ingredients and the amount used were carried out as described in Table 1.

얻어진 제품들에 대하여 물성과 수직입사법에 따른 흡음율, 발수성을 측정하고, 그 결과를 표 2에 기재하였다.About the obtained products, the sound absorption and water repellency according to the vertical incidence method were measured, and the results are shown in Table 2.

비교예 1 및 2Comparative Examples 1 and 2

사용된 성분 및 함량을 표 1에 기재된 바와 같이 실시한 것을 제외하고 실시예 1의 방법과 동일한 방법으로 흡음재를 제조하였다.A sound absorbing material was prepared in the same manner as in Example 1, except that the used ingredients and contents were carried out as described in Table 1.

얻어진 제품들에 대하여 물성과 수직입사법에 따른 흡음율, 발수성을 측정하고, 그 결과를 표 2에 기재하였다.About the obtained products, the sound absorption and water repellency according to the vertical incidence method were measured, and the results are shown in Table 2.

비교예 3 및 4Comparative Examples 3 and 4

종래의 경량 기포 콘크리트 흡음재를 비교예 3으로 하고, 유리섬유 흡음재를 비교예 4로 하여 이들에 대하여 물성과 수직입사법에 따른 흡음율, 발수성을 특정하였고, 그 결과를 표 2에 기재하였다.The conventional lightweight foamed concrete sound absorbing material was used as Comparative Example 3, and the glass fiber sound absorbing material was used as Comparative Example 4, and the sound absorption rate and water repellency according to the vertical incidence method were specified for them, and the results are shown in Table 2.

실시예 5Example 5

상기 실시예 3의 방법에 따라 고온고압 양생에 의해 제조된 초경량 콘크리트 흡음재에 침투성 실리콘 오일계 발수제로 표면코팅하였다.According to the method of Example 3, the super lightweight concrete sound absorbing material prepared by high temperature and high pressure curing was surface coated with a permeable silicone oil-based water repellent.

얻어진 제품에 대하여 물성과 수직입사법에 따른 흡음율, 발수성을 측정하고, 그 결과를 표 2에 기재하였다.About the obtained product, the sound absorption and water repellency by the vertical incidence method were measured, and the result is shown in Table 2.

실시예 6Example 6

상기 실시예 3의 방법에 발수성 확보를 위하여 개질 우레탄계 수지를 총고형분에 대하여 0.5중량%를 함께 첨가하여 7m/초의 선속도로 90초간 혼합한 후, 습공경화하였다.In order to secure water repellency in the method of Example 3, the modified urethane-based resin was added together with 0.5% by weight of total solids, and mixed at a linear speed of 7 m / sec for 90 seconds, and then wet-cured.

얻어진 제품에 대하여 물성과 수직입사법에 따른 흡음율, 발수성을 측정하고, 그 결과를 표 3에 기재하였다.About the obtained product, the sound absorption and water repellency by the vertical incidence method were measured, and the result is shown in Table 3.

Claims (5)

동물성 단백질 기초제, 알루미늄분말, 히드록시카본산염계의 계면활성계를 물과 혼합하여 기포발생 교반기에서 3 내지 8m/초의 선속도로 1차 교반하고, 응결시간이 20 내지 40분 이내로 조절된 소석회, 알루미나시멘트, 규사, 석고, 구연산, 1종 시멘트, 우레탄 수지를 첨가하여 2차 교반하고, 20±5℃범위에서 24시간 이내로 습공경화하여 고온고압 양생처리한 후, 실리콘 오일계 발수제로 표면처리하는 것임을 특징으로 하는 초경량 발수콘크리트 흡음재의 제조방법.Animal protein base, aluminum powder, hydroxy carbonate-based surfactants were mixed with water and stirred first in a bubble-generating stirrer at a linear speed of 3 to 8 m / sec, and the setting time was adjusted within 20 to 40 minutes. , Alumina cement, silica sand, gypsum, citric acid, 1 type cement, urethane resin, and the second stirring, wet curing in 24 ± 5 ℃ within 24 hours, high temperature and high pressure curing treatment, and then surface with silicone oil-based water repellent Method for producing an ultralight water-repellent concrete sound absorbing material, characterized in that the treatment. 제1항에 있어서, 상기 동물성 단백질 기포제는 총 고형분에 대하여 0.4 내지 0.6중량%를 사용하는 것임을 특징으로 하는 초경량 발수콘크리트 흡음재의 제조방법.According to claim 1, wherein the animal protein foaming agent manufacturing method of ultra-light water-repellent concrete sound absorbing material, characterized in that using 0.4 to 0.6% by weight based on the total solids. 제1항에 있어서, 상기 알루미늄분말은 총 고형분에 대하여 0.005 내지 0.01중량%를 사용하는 것임을 특징으로 하는 초경량 발수콘크리트 흡음재의 제조방법.The method of claim 1, wherein the aluminum powder is used in an amount of 0.005 to 0.01% by weight based on the total solids. 제1항에 있어서, 1차 교반은 60 내지 90초 이내로 실시하는 것인 초경량 발수콘크리트 흡음재의 제조방법.The method for producing an ultralight water-repellent concrete sound absorbing material according to claim 1, wherein the first stirring is performed within 60 to 90 seconds. 제1항에 있어서, 1차 교반과 2차 교반 시간은 총 180초 이내인 것인 초경량 발수콘크리트 흡음재의 제조방법.The method of claim 1, wherein the first stirring and the second stirring time are within 180 seconds in total.
KR1019940010740A 1994-05-17 1994-05-17 Process for the preparation of water-repellent light-weight concrete for sound absorption KR970001045B1 (en)

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