KR100498842B1 - Manufacturing apparatus for air-entrained concrete slurry having foaming machine - Google Patents

Manufacturing apparatus for air-entrained concrete slurry having foaming machine Download PDF

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Publication number
KR100498842B1
KR100498842B1 KR10-2002-0043010A KR20020043010A KR100498842B1 KR 100498842 B1 KR100498842 B1 KR 100498842B1 KR 20020043010 A KR20020043010 A KR 20020043010A KR 100498842 B1 KR100498842 B1 KR 100498842B1
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South Korea
Prior art keywords
slurry
bubble
reducer
mixed
concrete slurry
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KR10-2002-0043010A
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Korean (ko)
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KR20040009166A (en
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이세현
송태협
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한국건설기술연구원
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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
    • B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
    • B28C5/381—Producing cellular concrete
    • B28C5/383—Producing cellular concrete comprising stirrers to effect the mixing
    • 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
    • B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
    • B28C5/381—Producing cellular concrete
    • B28C5/386—Plants; Systems; Methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/16—Discharge means, e.g. with intermediate storage of fresh concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C9/00—General arrangement or layout of plant
    • B28C9/02—General arrangement or layout of plant for producing mixtures of clay or cement with other materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

본 발명은 기포제와 혼합된 슬러리에 주입된 기포덩어리를 잘게 나누며, 그 분포를 균일하게 하는 기포 콘크리트 슬러리 제조장치에 관한 것으로, 콘크리트 슬러리 원료들을 혼합하기 위한 임펠러를 구비한 혼합탱크; 상기 혼합탱크에서 혼합된 원료들을 배출하는 펌프; 상기 혼합된 콘크리트 슬러리에 소정 압력으로 공기를 공급하기 위한 압축기; 상기 펌프의 배출부에 연결되어서 압축기로부터 공기를 공급받은 혼합 슬러리가 배출되는 배출관; 및 상기 배출관에 장착되어 공기가 혼합된 슬러리를 발포시키는 발포기를 포함하며, 상기 발포기는, 상기 배출관과 연결되고 슬러리가 유입되는 리듀서; 상기 리듀서와 결합되고 상기 슬러리를 배출하는 이송관; 및 상기 리듀서와 이송관의 내부에 수용되며, 발포수단을 구비하는 기포처리관을 포함하는 기포 콘크리트 슬러리 제조장치를 제공한다.The present invention relates to a foamed concrete slurry production apparatus for finely dividing the bubble mass injected into the slurry mixed with the foaming agent, and to uniform the distribution, comprising: a mixing tank having an impeller for mixing the raw materials of the concrete slurry; A pump for discharging the mixed raw materials in the mixing tank; A compressor for supplying air to the mixed concrete slurry at a predetermined pressure; A discharge pipe connected to the discharge part of the pump to discharge the mixed slurry supplied with air from the compressor; And a foamer mounted on the discharge pipe and foaming the slurry mixed with air, wherein the foamer includes: a reducer connected to the discharge pipe and into which the slurry is introduced; A transfer pipe coupled with the reducer and discharging the slurry; And it is accommodated in the reducer and the transfer pipe, and provides a bubble concrete slurry manufacturing apparatus comprising a bubble processing tube having a foaming means.

Description

발포기를 구비한 기포 콘크리트 슬러리 제조장치 {MANUFACTURING APPARATUS FOR AIR-ENTRAINED CONCRETE SLURRY HAVING FOAMING MACHINE} Foam Concrete Slurry Manufacturing Equipment with Foaming Machine {MANUFACTURING APPARATUS FOR AIR-ENTRAINED CONCRETE SLURRY HAVING FOAMING MACHINE}

본 발명은 기포 콘크리트 슬러리 제조장치에 관한 것으로, 특히, 배출부에 발포기를 구비하여 공기기포제가 혼합된 슬러리에 공기가 유입되어 형성된 기포를 더 작은 덩어리의 기포로 나누고, 고르게 분포시키는 발포기를 굽한 슬러리 제조장치에 관한 것이다.The present invention relates to an apparatus for producing aerated concrete slurry, and in particular, a slurry having a foaming machine for dividing bubbles formed by inflowing air into a slurry in which an air bubbler is mixed with a foaming unit at a discharge portion into smaller bubbles and evenly distributing the bubbles. It relates to a manufacturing apparatus.

일반적으로, 경량 기포콘크리트는 일반의 콘크리트와는 다르게 경량이면서 우수한 단열 특성을 갖기 때문에 적용 분야의 확대가 기대되는 콘크리트 재료로서, 임의로 배합된 시멘트 조성물과 물로 배합된 슬러리(slurry)에 기포제를 사용하여 다량의 세공기포를 도입한 것이다.In general, lightweight foamed concrete is a concrete material that is expected to expand the field of application because it is lightweight and has excellent heat insulating properties, unlike ordinary concrete, using a foaming agent in a slurry blended with an arbitrary cement composition and water A large amount of pore bubbles are introduced.

기포 콘크리트를 제조하기 위해 현재 가장 많이 사용되는 방식은 선발포식(pre-foaming system)이다. 이 방식은 기포제를 물에 별도로 희석하여 기포발생 장치를 통해 만들어진 기포 군을 별도로 준비한 시멘트 슬러리에 혼합하는 방식이다. 도1에 도시된 바와 같이, 이러한 선발포식 공정은 크림상의 발포 액과 슬러리를 따로 제조하여, 혼합, 펌핑 및 타설의 과정을 거친다. The most commonly used method for producing aerated concrete is the pre-foaming system. This method is a method of diluting the foaming agent in water separately and mixing the group of bubbles made through the bubble generator to the cement slurry prepared separately. As shown in FIG. 1, this pre-foaming process separately prepares a creamy foam liquid and a slurry, and undergoes mixing, pumping, and pouring.

다른 방식으로는 기포제를 시멘트 슬러리를 만들 때 함께 넣고 강한 믹싱에 의해 기포를 발생시키는 방법으로써 혼합 교반방식(mixing foaming system)이 있다.Another method is a mixing foaming system, in which a foaming agent is put together to form a cement slurry and bubbles are generated by strong mixing.

상기의 방법들 모두 기포콘크리트를 제조하기 위해 기포제와 슬러리를 혼합한 과정을 거친 후, 공기를 주입하여 기포를 발생시키는 것이다. 그러나 상기와 같은 종래 기술은 기포 콘크리트 슬러리를 제조함에 있어서, 기포 덩어리의 크기 및 분포를 균일하게 할 수가 없어서, 기포 콘크리트의 품질이 일정하지 않은 문제점이 있었다.All of the above methods are to produce a bubble by injecting air after a mixture of the foaming agent and the slurry to prepare a foam concrete. However, in the prior art as described above, there is a problem in that the size and distribution of the bubble agglomerate cannot be uniform in manufacturing the bubble concrete slurry, so that the quality of the bubble concrete is not constant.

따라서, 본 발명은 상기의 제반 문제점을 해결하기 위하여 안출된 것으로서, 기포 콘크리트 제조장치의 배출부에 기포제와 혼합된 슬러리에 주입된 기포덩어리를 잘게 나누며, 그 분포를 균일하게 하는 발포기를 장착하여 양질의 품질을 제조할 수 있는 발포기를 구비한 기포 콘크리트 슬러리 제조장치를 제공하는데 그 목적이 있다. Therefore, the present invention has been made in order to solve the above problems, finely divide the bubble lumps injected into the slurry mixed with the foaming agent in the discharge portion of the foam concrete manufacturing apparatus, and equipped with a foamer to uniform the distribution It is an object of the present invention to provide a foamed concrete slurry manufacturing apparatus having a foaming machine capable of producing a quality of.

상기와 같은 목적을 달성하기 위하여, 본 발명은 콘크리트 슬러리 원료들을 혼합하기 위한 임펠러를 구비한 혼합탱크; 상기 혼합탱크에서 혼합된 원료들을 배출하는 펌프; 상기 혼합된 콘크리트 슬러리에 소정 압력으로 공기를 공급하기 위한 압축기; 상기 펌프의 배출부에 연결되어서 압축기로부터 공기를 공급받은 혼합 슬러리가 배출되는 배출관; 및 상기 배출관에 장착되어 공기가 혼합된 슬러리를 발포시키는 발포기를 포함하며, 상기 발포기는, 상기 배출관과 연결되고 슬러리가 유입되는 리듀서; 상기 리듀서와 결합되고 상기 슬러리를 배출하는 이송관; 및 상기 리듀서와 이송관의 내부에 수용되며, 발포수단을 구비하는 기포처리관을 포함하는 기포 콘크리트 슬러리 제조장치를 제공한다.In order to achieve the above object, the present invention is a mixing tank having an impeller for mixing the concrete slurry raw materials; A pump for discharging the mixed raw materials in the mixing tank; A compressor for supplying air to the mixed concrete slurry at a predetermined pressure; A discharge pipe connected to the discharge part of the pump to discharge the mixed slurry supplied with air from the compressor; And a foamer mounted on the discharge pipe and foaming the slurry mixed with air, wherein the foamer includes: a reducer connected to the discharge pipe and into which the slurry is introduced; A transfer pipe coupled with the reducer and discharging the slurry; And it is accommodated in the reducer and the transfer pipe, and provides a bubble concrete slurry manufacturing apparatus comprising a bubble processing tube having a foaming means.

이하 도면을 참조하여, 본 발명에 의한 발포기를 구비한 기포 콘크리트 슬러리 제조장치의 구성을 설명한다.Hereinafter, with reference to the drawings, the configuration of the bubble concrete slurry production apparatus having a foamer according to the present invention.

도2에 도시된 바와 같이, 기포 콘크리트 제조장치는 상부에 슬러리 원료 및 기포제 유입하기 위한 파이프(102)를 구비하고, 하부에 유입된 원료들을 혼합 위한 임펠러(101)를 구비한 혼합탱크(100)와; 상기 혼합탱크(100)에서 혼합된 원료들을 배출하는 펌프(200); 상기 혼합된 기폰 콘크리트 슬러리에 소정 압력으로 공기를 공급하기 위한 압축기(400); 상기 압축기의 압력을 소정치 이하로 감압시키는 감압기(401); 상기 감압기의 압력을 계측하는 압력계(402); 상기 펌프(200)의 배출부에 연결되어서 압축기(400)로부터 공기를 공급받은 혼합 슬러리가 배출되는 배출관(300); 및 상기 배출관(300)에 장착되어 공기가 혼합된 슬러리를 발포시키는 발포기(500)로 구성된다.As shown in FIG. 2, the bubble concrete manufacturing apparatus includes a pipe 102 for injecting slurry raw material and a foaming agent in an upper portion thereof, and a mixing tank 100 having an impeller 101 for mixing raw materials introduced in a lower portion thereof. Wow; A pump (200) for discharging the raw materials mixed in the mixing tank (100); A compressor (400) for supplying air at a predetermined pressure to the mixed chiffon concrete slurry; A pressure reducer 401 for reducing the pressure of the compressor to a predetermined value or less; A pressure gauge 402 for measuring the pressure of the pressure reducer; A discharge pipe 300 connected to the discharge part of the pump 200 to discharge the mixed slurry supplied with air from the compressor 400; And a foamer 500 mounted to the discharge pipe 300 to foam the slurry mixed with air.

여기서, 상기 발포기(500)는 슬러리에 균일한 크기의 기포를 균일한 분포로 발생시키는 것으로 이를 도3을 참조하여 상세히 설명한다.Here, the foamer 500 generates bubbles of uniform size in the slurry in a uniform distribution, which will be described in detail with reference to FIG. 3.

상기 발포기(500)는 상기 슬러리 배출관(300)과 연결되고, 소정부위의 직경이 배출방향으로 확장되는 형상으로 이루어져 상기 공기가 주입된 슬러리의 유입 경로를 제공하는 리듀서(reducer)(510); 상기 리듀서(510)와 연결되어 기포가 형성된 슬러리를 배출하는 이송관(550); 상기 리듀서(510)와 이송관(550) 사이에 위치되며, 상기 슬러리의 공기를 잘게 나누어 발포시키도록 다수의 짧은 실린더 파이프 형상의 발포관(541)이 내부에 불규칙하게 배열되는 기포처리관(540); 및 상기 리듀서(510)과 기포처리관(540)의 일단의 연결부 및 기포처리관(540)의 타단과 이송관(550)의 연결부를 밀봉하는 원형 링(530)을 포함한다.The foamer 500 is connected to the slurry discharge pipe 300, the diameter of a predetermined portion is formed in a shape extending in the discharge direction (reducer) for providing an inflow path of the air injected slurry (510); A transfer pipe 550 connected to the reducer 510 to discharge the slurry in which bubbles are formed; Located between the reducer 510 and the transfer pipe 550, a plurality of short cylinder pipe-shaped foam pipe 541 irregularly arranged inside the bubble processing tube 540 to finely divide the air of the slurry to foam ); And a circular ring 530 that seals the connection of one end of the reducer 510 and the bubble processing tube 540 and the other end of the bubble processing tube 540 and the connection of the transfer pipe 550.

상기 리듀서(510) 끝단에 형성된 제1플렌지(520)와 상기 이송관(550)의 끝단에 형성된 제2플렌지(560)는 볼트(570) 및 너트(571)에 의해 결합되어 상기 리듀서(510)와 이송관(550)을 고정한다.The first flange 520 formed at the end of the reducer 510 and the second flange 560 formed at the end of the transfer pipe 550 are coupled by the bolt 570 and the nut 571 to reduce the 510. And the transfer pipe 550 to be fixed.

상기와 같이 구성된 기포발생장치의 작용상태를 설명하면 다음과 같다.Referring to the operation state of the bubble generating device configured as described above are as follows.

상기의 슬러리 원료 및 기포제가 상기 혼합탱크(100)에 주입되면, 상기 혼합탱크(100) 내부의 임펠러(101)가 상기 혼합원료들을 균일하게 혼합하여, 슬러리 형태로 만든다. 상기 슬러리는 펌프(200)에 의해 발포기(500) 측으로 이송되며, 이때 압축기(400)에서 상기 슬러리로 공기가 주입되는데, 공기의 압력은 감압기(401)에 의해 일정하게 유지된다. When the slurry raw material and the foaming agent are injected into the mixing tank 100, the impeller 101 inside the mixing tank 100 uniformly mixes the mixed raw materials to form a slurry. The slurry is conveyed to the foamer 500 by the pump 200, where air is injected into the slurry from the compressor 400, and the pressure of the air is kept constant by the pressure reducer 401.

상기 공기가 주입된 슬러리는 배출부(300)를 거쳐 발포기(500)로 이송된다. 상기 슬러리는 리듀서(510)를 통해 발포기 내부로 유입되어, 기포 처리관(540)을 거치게 되며, 슬러리 내의 기포는 상기 기포처리관(540) 내부에 불규칙하게 분포된 발포관(541)을 거치면서 더욱 작은 크기로 나누어지고, 슬러리 전체에 균일하게 분포된다. 따라서, 상기 슬러리가 기포처리관(540)을 통과하면 적절한 크기의 기포가 고르게 분포되어 이송관(550)을 통해 배출되어 양질의 기포 콘크리트 슬러리가 만들어지게 된다.The slurry into which the air is injected is transferred to the foamer 500 via the discharge part 300. The slurry is introduced into the foaming machine through the reducer 510 and passes through the bubble processing tube 540, and bubbles in the slurry pass through the foam tube 541 irregularly distributed inside the bubble processing tube 540. While being divided into smaller sizes and evenly distributed throughout the slurry. Therefore, when the slurry passes through the bubble processing tube 540, bubbles of an appropriate size are evenly distributed and discharged through the transfer tube 550, thereby making a high quality foam concrete slurry.

이상에서 설명한 본 발명은 전술한 실시예 및 첨부된 도면에 의해 한정되는 것이 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위내에서 여러 가지 치환, 변형 및 변경이 가능하다는 것이 본 발명이 속하는 분야에서 통상의 지식을 가진 자에게 있어서 명백할 것이다.The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the field of the present invention that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

전술한 바와 같이 본 발명에 의하면, 기포처리관 내에 다수의 발포관을 구비함으로써 콘크리트 슬러리 내부에 형성되는 기포를 더욱 작은 크기로 형성시킬 수 있고, 균일하게 분포시킬 수 있는 효과가 있다. As described above, according to the present invention, by providing a plurality of foam tubes in the bubble processing tube, bubbles formed in the concrete slurry can be formed to a smaller size, and there is an effect that can be uniformly distributed.

도1은 일반적인 방법에 의한 기포 콘크리트를 제조하는 과정을 도시한 흐름도.1 is a flow chart illustrating a process of manufacturing foam concrete according to a general method.

도2는 본 발명에 의한 기포 콘크리트 제조장치의 구성을 도시한 개략도.Figure 2 is a schematic diagram showing the configuration of a bubble concrete manufacturing apparatus according to the present invention.

도3은 도2의 기포 발생장치의 구성을 도시한 분해사시도.3 is an exploded perspective view showing the configuration of the bubble generator of FIG. 2;

*도면의 주요부분에 대한 설명.* Description of the main parts of the drawing.

100 : 혼합탱크 200 : 펌프100: mixing tank 200: pump

300 : 배출구 400 : 압축기300: outlet 400: compressor

500 : 발포기 510 : 리듀서(reducer)500: foaming machine 510: reducer (reducer)

540 : 기포처리관 541 : 발포관540: bubble tube 541: foam tube

550 : 이송관 550: transfer pipe

Claims (5)

콘크리트 슬러리 원료들을 혼합하기 위한 임펠러를 구비한 혼합탱크; A mixing tank having an impeller for mixing the concrete slurry raw materials; 상기 혼합탱크에서 혼합된 원료들을 배출하는 펌프; A pump for discharging the mixed raw materials in the mixing tank; 상기 혼합된 콘크리트 슬러리에 소정 압력으로 공기를 공급하기 위한 압축기; A compressor for supplying air to the mixed concrete slurry at a predetermined pressure; 상기 펌프의 배출부에 연결되어서 압축기로부터 공기를 공급받은 혼합 슬러리가 배출되는 배출관; 및  A discharge pipe connected to the discharge part of the pump to discharge the mixed slurry supplied with air from the compressor; And 상기 배출관에 장착되어 공기가 혼합된 슬러리를 발포시키는 발포기A foaming machine mounted to the discharge pipe to foam the slurry mixed with air 를 포함하며,Including; 상기 발포기는The foaming machine 상기 배출관과 연결되고, 슬러리가 유입되는 리듀서; 상기 리듀서와 결합되고 상기 슬러리를 배출하는 이송관; 및 상기 리듀서와 이송관의 내부에 수용되며, 발포수단을 구비하는 기포처리관A reducer connected to the discharge pipe and into which the slurry is introduced; A transfer pipe coupled with the reducer and discharging the slurry; And a bubble processing tube accommodated in the reducer and the transfer pipe and having foaming means. 을 포함하는 기포 콘크리트 슬러리 제조장치.Bubble concrete slurry manufacturing apparatus comprising a. 제 1 항에 있어서,The method of claim 1, 상기 압축기는 The compressor 상기 압축기의 압력을 소정치 이하로 감압시키는 감압기; 및A pressure reducer for reducing the pressure of the compressor to a predetermined value or less; And 상기 감압기의 압력을 계측하는 압력계Pressure gauge to measure the pressure of the pressure reducer 를 포함하는 기포 콘크리트 슬러리 제조장치.Bubble concrete slurry manufacturing apparatus comprising a. 제 1 항에 있어서,The method of claim 1, 상기 기포처리관 내부에 다수가 불규칙하게 위치하며, 짧은 관 형상으로 이루어진 발포관A plurality of irregularly positioned inside the bubble processing tube, a foam tube made of a short tube shape 을 포함하는 기포 콘크리트 슬러리 제조장치.Bubble concrete slurry manufacturing apparatus comprising a. 제 3 항에 있어서, The method of claim 3, wherein 상기 리듀서와 기포처리관의 일단의 연결부 및 상기 기포처리관의 타단과 이송관의 연결부는 원형의 링으로 밀봉되는The connection part of one end of the reducer and the bubble processing tube and the other end of the bubble processing tube and the connection portion of the transfer tube are sealed by a circular ring. 기포 콘크리트 슬러리 제조장치.Bubble concrete slurry manufacturing device. 삭제delete
KR10-2002-0043010A 2002-07-22 2002-07-22 Manufacturing apparatus for air-entrained concrete slurry having foaming machine KR100498842B1 (en)

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CN100566961C (en) * 2007-08-24 2009-12-09 金成雄 A kind of foaming machine of making foamed bricks
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JPH0748183A (en) * 1993-06-02 1995-02-21 Asahi Chem Ind Co Ltd Production of bubble for lightweight cellular concrete, apparatus therefor and production of lightweight cellular concrete
JPH08333181A (en) * 1995-06-05 1996-12-17 Nippon Cement Co Ltd Foam generator for producing foamed concrete and control of variation in unit volume mass of concrete foam
KR19990024285A (en) * 1998-12-31 1999-03-25 박영철 Lightweight insulation foam concrete construction method and device
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JPH0748183A (en) * 1993-06-02 1995-02-21 Asahi Chem Ind Co Ltd Production of bubble for lightweight cellular concrete, apparatus therefor and production of lightweight cellular concrete
JPH08333181A (en) * 1995-06-05 1996-12-17 Nippon Cement Co Ltd Foam generator for producing foamed concrete and control of variation in unit volume mass of concrete foam
KR20000001358A (en) * 1998-06-10 2000-01-15 장병주, 이일쇄 Material input amount control system for lightweight air bubble concrete manufacture
KR19990024285A (en) * 1998-12-31 1999-03-25 박영철 Lightweight insulation foam concrete construction method and device
KR100317818B1 (en) * 1999-02-02 2001-12-22 정순착 System for manufacturing cellular concrete in field

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