KR20050034072A - Light weight bubble concrete wall panel construction and the manufacture method - Google Patents
Light weight bubble concrete wall panel construction and the manufacture method Download PDFInfo
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- KR20050034072A KR20050034072A KR1020030069876A KR20030069876A KR20050034072A KR 20050034072 A KR20050034072 A KR 20050034072A KR 1020030069876 A KR1020030069876 A KR 1020030069876A KR 20030069876 A KR20030069876 A KR 20030069876A KR 20050034072 A KR20050034072 A KR 20050034072A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0053—Machines or methods for applying the material to surfaces to form a permanent layer thereon to tiles, bricks or the like
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
- E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
- E04C2/288—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material
- E04C2/2885—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and concrete, stone or stone-like material with the insulating material being completely surrounded by, or embedded in, a stone-like material, e.g. the insulating material being discontinuous
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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
- C04B2103/34—Flow improvers
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
본 발명은 건축물의 내외벽재에 사용되는 경량기포콘크리트벽체 패널 구조체 및 그의 제조방법에 관한 것으로, 보다 상세하게는 셀룰로오스화이버 시멘트보드(cellulose fiber cement board)와 보드 사이에 시멘트, 스티로폼 입자, 기포제, 유동화제 및 조강제를 혼합하여 제조한 스티로폼혼합 기포콘크리트 모르타르(mortar)를 직접 타설하고, 양생 후 탈형시켜 제조한 것으로 경량화, 내화, 차음 및 단열 기능이 뛰어나고, 내수 및 내구성이 우수할 뿐만 아니라 현장 가공이 용이하여 편리성과 경제성을 두루 갖춘 경량기포콘크리트벽체 패널 구조체 및 그의 제조방법에 관한 것이다. The present invention relates to a lightweight foamed concrete wall panel structure used in interior and exterior wall materials of a building and a method of manufacturing the same, and more particularly, to cement, styrofoam particles, foaming agents, and fluidization between cellulose fiber cement boards and boards. Styrofoam mixed foamed concrete mortar prepared by mixing agent and steel is directly poured and demolded after curing. It is excellent in light weight, fire resistance, sound insulation and insulation, and has excellent water resistance and durability. The present invention relates to a lightweight foamed concrete wall panel structure having a convenient and economical efficiency and a method of manufacturing the same.
Description
본 발명은 경량기포콘크리트벽체 패널 구조체 및 그의 제조방법에 관한 것으로, 보다 상세하게는 아파트나 빌딩 건축 시 내외벽재로 간편히 사용될 수 있도록 스티로폼 입자와 기포제, 유동화제 및 조강제로 구성된 혼화제를 혼합하여 제조한 스티로폼혼합 기포콘크리트를 셀룰로오스화이버 시멘트 보드(cellulose fiber cement board) 사이에 타설을 하고, 고온의 양생실에서 양생을 하여 제조하는 경량기포콘크리트벽체패널로써 초경량이면서 방음, 단열의 효과가 우수하고, 건축 공정의 단축으로 편리성과 경제성을 높인 건축내외벽용 경량기포콘크리트벽체 패널 구조체 및 그의 제조방법에 관한 것이다.The present invention relates to a lightweight foamed concrete wall panel structure and a method for manufacturing the same, and more particularly, to prepare a mixture of styrofoam particles and a foaming agent, a fluidizing agent and a reinforcing agent so that it can be easily used as interior and exterior wall materials during apartment or building construction Styrofoam mixed foam concrete is placed between cellulose fiber cement boards and cured in a high-temperature curing room to produce lightweight foam concrete wall panels. The present invention relates to a lightweight foamed concrete wall panel structure for building interior and exterior walls, and a method of manufacturing the same.
기존의 건축용 패널은 건식화, 경량화를 얻기 위해 양면철판에 스티로폼과 같은 보온재를 내부에 매설하여 성형한 것을 일반적으로 사용하여 왔다. 그러나 이러한 패널은 가설 건축물이나 임시구조물 등 비영구 구조물에만 사용할 수 있어 용도에 제한을 받는 결점이 있었다.Conventional building panels have been commonly used to form a thermal insulation material such as styrofoam in the double-sided steel sheet in order to dry and lightweight. However, these panels can be used only for non-permanent structures such as temporary buildings and temporary structures, and thus have limitations in their use.
경량복합패널의 대표적인 종래 기술로는 특허공보 제1995-0008608호에 공지된 "경량복합패널 구조체 및 그 제조방법"이 있는데, 이는 아크릴수지와 시멘트를 혼합하여 접착제를 만들고, 셀룰로오스화이버 시멘트 보드와 보드 사이에 스티로폼 입자와 시멘트를 혼합시킨 고체 상태의 스티로폼 혼합 경량콘크리트판을 수작업을 통해 상기의 접착제로 접착하여 만든 제품으로 보드와 경량복합콘크리트패널과 분리 현상이 발생되고, 시멘트에 스티로폼 입자만 첨가되기 때문에 기포와 스티로폼을 혼합한 패널보다 단위중량이 더 무겁고, 내화문제에 있어서도 문제가 발생되었다. Representative prior art of lightweight composite panel is a "lightweight composite panel structure and its manufacturing method" known from Patent Publication No. 199595-0008608, which is made by mixing acrylic resin and cement to make an adhesive, cellulose fiber cement board and board Styrofoam mixed with styrofoam particles and cement in between is a product made by adhering the light-weight concrete board with the above-mentioned adhesive by manual adhesive. Separation phenomenon occurs between the board and the light-weight composite concrete panel, and only styrofoam particles are added to the cement. Therefore, the unit weight is heavier than the panel mixed with foam and styrofoam, and a problem occurs in the fire resistance problem.
또한, 제품을 수작업으로 하기 때문에 제조 공정도 늦을뿐더러 제품의 일관성이 떨어지고, 혼합콘크리트패널의 두께가 일정하지 않아 현장 시공에 어려움이 많았다.In addition, because the product is made by hand, the manufacturing process is slow, and the consistency of the product is inferior, and the thickness of the mixed concrete panel is not constant, which makes it difficult to construct the site.
상기와 같은 결점을 해결하기 위해 기포제를 혼합한 패널이 개발되었는데, 이는 공기층을 형성하여 제품의 경량화와 내화 및 방음을 더욱 향상시키고, 음진동과 열전도율을 낮추어 최상의 단열을 얻을 수 있다.In order to solve the above drawbacks, a panel containing a mixture of foaming agents has been developed, which forms an air layer to further improve the weight and fire resistance and sound insulation of the product, and to obtain the best thermal insulation by lowering the sound vibration and thermal conductivity.
최근에는 기포콘크리트에 여러 종류의 골재를 사용한 혼합콘크리트가 널리 사용되고 있다.Recently, mixed concrete using various kinds of aggregates in aerated concrete has been widely used.
따라서 본 발명은 주된 목적은 액체(solution)상태의 스티로폼 혼합 기포콘크리트를 대형 몰드에 장착한 셀룰로오스화이버 시멘트보드(cellulose fiber cement board) 사이에 직접 타설하여 제조함으로써 생산성과 경제성이 우수하고, 제품의 대량생산이 가능한 경량기포콘크리트패널 구조체 및 그의 제조방법을 제공하는데 있다.Therefore, the main object of the present invention is to produce styrofoam mixed foam concrete in a solution state directly between cellulose fiber cement boards mounted on large molds, thereby producing excellent productivity and economy, and providing a large amount of products. The present invention provides a lightweight foamed concrete panel structure and a method of manufacturing the same.
본 발명의 다른 목적은 경량기포콘크리트패널의 제조 공정 과정에서 고온의 양생실에서 단기간 양생시켜 생산하여 탈형시키므로 경제적으로 인건비와 생산비를 감축시키고, 건축공정 기간 역시 단축이 가능한 경량기포콘크리트패널 구조체 및 그의 제조방법을 제공하는데 있다.Another object of the present invention is to produce and demould by curing in a short period of time in a high-temperature curing room during the manufacturing process of lightweight foam concrete panel, economically reduce the labor cost and production cost, and the construction process period can also shorten the lightweight foam concrete panel structure and its It is to provide a manufacturing method.
본 발명의 또 다른 목적은 기포제, 유동화제 및 조강제를 첨가하여 스티로폼혼합 기포콘크리트를 제조함으로써 초경량이면서 방음, 단열의 효과가 우수하고, 편리성과 경제성을 높인 경량기포콘크리트벽체 패널 구조체 및 그의 제조방법을 제공하는데 있다.Still another object of the present invention is to prepare a styrofoam mixed foamed concrete by adding a foaming agent, a fluidizing agent, and a coarse additive to provide a lightweight foam concrete wall panel structure having a super light weight, excellent soundproofing, and high thermal insulation effect, and convenience and economy. To provide.
이에 상기의 목적을 이루기 위해 본 발명은 시멘트, 셀룰로오스, 기포제, 스티로폼 입자, 물, 조강제 및 유동화제를 혼합하여 셀룰로오스화이버 시멘트보드(cellulose fiber cement board)(2)를 제조하고, 기포제, 조강제 및 유동화제로 이루어진 혼화제를 스티로폼 입자와 시멘트를 혼합한 시멘트혼합액에 투입하여 액체상태의 스티로폼혼합 기포콘크리트(3) 모르타르(mortar)를 제조하고, 셀룰로오스화이버 시멘트보드(2)를 압출바 사이에 끼워 형성한 몰드에 상기의 스티로폼혼합 기포콘크리트(3)를 타설하여 20~50 ??, 바람직하게는 30~40 ??의 양생실에서 8~12 시간, 바람직하게는 9~11 시간 양생한 다음 탈형 하는 제조 공정으로 이루어진다.In order to achieve the above object, the present invention is to prepare a cellulose fiber cement board (2) by mixing cement, cellulose, foaming agent, styrofoam particles, water, crude and glidant, foaming agent, crude And a mixed agent composed of a fluidizing agent is added to a cement mixture in which styrofoam particles and cement are mixed to prepare a foamed concrete foam (3) mortar in a liquid state, and a cellulose fiber cement board (2) is sandwiched between extrusion bars. The styrofoam mixed foam concrete (3) is poured into a mold and cured in a curing chamber of 20 to 50 ° C., preferably 30 to 40 ° C. for 8 to 12 hours, preferably 9 to 11 hours, and then demolded. It consists of a manufacturing process.
상기의 혼화제는 제품의 용도, 중량, 양생과정, 계절 등 여러 요인들에 따라 변화하지만 일반적으로 시멘트 비율의 2 중량% 내외로 사용되는데, 너무 많이 사용하면 경화가 느려져 작업성에 문제가 생긴다.The admixture is varied depending on various factors such as the product's use, weight, curing process, season, etc., but is generally used at about 2% by weight of the cement ratio.
패널의 중량을 가볍게 하기 위해 첨가되는 기포제는 유기산염 복합 혼합제의 수성용액으로 시멘트의 수화를 촉진하는 촉매가 첨가되어 있으며, 가동성(workability)을 향상시키고, 제품을 경량화 하는데 주 목적이 있다. The foaming agent added to lighten the weight of the panel is an aqueous solution of the organic acid complex mixture, and a catalyst for promoting the hydration of cement is added, and the main purpose is to improve workability and lighten the product.
그 예로는 고급다가 알콜의 술폰산염, 알킬아릴 술폰산염, 폴리옥시 에틸렌 알킬아릴 에테르, 폴리올 복합체, 옥시 카르본산계 유기산염 중 적어도 1종 이상 혼합된 것을 사용하되, 그 양은 0.1~0.5 중량%, 바람직하게는 0.15~0.3 중량%가 적당하다. Examples thereof include a mixture of at least one of sulfonates, alkylaryl sulfonates, polyoxyethylene alkylaryl ethers, polyol complexes, and oxycarboxylic acid organic acid salts of higher polyhydric alcohols, the amount of which is 0.1 to 0.5% by weight, Preferably 0.15 to 0.3% by weight is appropriate.
유동화제는 시멘트 입자를 분산시켜 잘 퍼지게 하여 시멘트의 흐름성을 조절함으로써 작업성을 좋게 하며, 시멘트의 수화열을 줄이고 높은 강도를 얻게 하기 위해 첨가한다. The fluidizing agent disperses the cement particles and spreads them well to adjust the flowability of the cement to improve workability, and is added to reduce the heat of hydration of the cement and to obtain high strength.
상기의 예로는 리그린 술폰산, 멜라민 술폰산(멜라민 포르말린 수지 술폰산), 나프탈렌 술폰산, 폴리카르본산(폴리알킬아릴 술폰산염) 중 적어도 1종 이상을 혼합하여 사용하되, 그 양은 0.5~2.0 중량%, 바람직하게는 0.7~1.5 중량%가 적당하다.Examples of the above may be used by mixing at least one or more of lignin sulfonic acid, melamine sulfonic acid (melamine formalin resin sulfonic acid), naphthalene sulfonic acid, and polycarboxylic acid (polyalkylaryl sulfonic acid salt), the amount of which is 0.5 to 2.0% by weight, preferably 0.7-1.5% by weight is suitable.
시멘트의 수화작용을 촉진하여 응결 시간을 단축시키며, 초기 발열성을 좋게 하여 경화를 빠르게 하고(예를 들어 조강제가 첨가된 콘크리트를 10 ??에서 타설하면 일반 콘크리트에 비해 2 시간 이상 빨리 경화한다), 강도를 증가시키는 역할을 하는 조강제는 CaCl2와 Na2CO3를 혼합하여 사용하거나, TEA(트리에탄올아민), 글리세린 등이 사용되는데 그 양은 0.5~3.0 중량%, 바람직하게는 1.0~2.0 중량%가 적당하다.It accelerates the hydration of cement to shorten the condensation time, improves initial heat generation and accelerates hardening (for example, when concrete is added to steel at 10 ° C, it hardens more than 2 hours faster than ordinary concrete). , The coarsening agent that increases the strength is used by mixing CaCl 2 and Na 2 CO 3 , or TEA (triethanolamine), glycerin and the like is used in the amount of 0.5 to 3.0% by weight, preferably 1.0 to 2.0% by weight % Is suitable.
다음의 실시예는 본 발명을 좀 더 상세하게 설명한 것으로, 본 발명의 범주를 한정하는 것은 아니다.The following examples illustrate the invention in more detail, and do not limit the scope of the invention.
<실시예><Example>
물과 시멘트를 중량비 1.0 : 1.5 (물/시멘트비 0.4~0.5 이내)가 되도록 혼합한 후 4~5 ㎜로 발포한 스티로폼 입자를 시멘트와 1 : 39(스티로폼 발포입자/시멘트)의 중량비로 첨가하였다.Water and cement were mixed in a weight ratio of 1.0: 1.5 (within water / cement ratio of 0.4 to 0.5), and then foamed styrofoam particles of 4 to 5 mm were added at a weight ratio of cement and 1:39 (styrofoam foamed particles / cement).
상기의 스티로폼 시멘트 혼합액에 혼화제를 표 1의 비율로 투입하고약 2분간 혼합하여 슬러리 상태의 스티로폼혼합 기포콘크리트(3) 모르타르를 제조하였다. A admixture was added to the styrofoam cement mixture at the ratio of Table 1 and mixed for about 2 minutes to prepare a foamed styrofoam mixed foam concrete (3) mortar in a slurry state.
다음의 표 1은 상기 스티로폼혼합 기포콘크리트(3)의 배합비이다. Table 1 below shows the mixing ratio of the styrofoam mixed foamed concrete 3.
[표][table]
몰드에 묻어있는 잔여 혼합물 및 이물질을 깨끗이 제거하고, 인터리브(intereave)를 지브 크레인을 이용하여 트롤리(trolley)로 이송시켜 알루미늄 압출바를 조립하였다.The remaining mixture and debris on the mold were removed and the interleaved was transferred to a trolley using a jib crane to assemble the aluminum extrusion bar.
알루미늄 압출바 조립이 완료 후 셀룰로오스화이버 시멘트 보드(2)를 양면에 취부하여 몰드 조립이 완료되면 혼합 타설 공정으로 몰드를 이송시키고, 몰드에 고정된 셀룰로오스화이버 시멘트 보드(2)와 보드(2) 사이에 상기에서 제조한 스티로폼혼합 기포콘크리트(3) 모르타르를 충진시켜 타설이 완료되면 몰드를 양생실로 옮겨 30~40 ??에서 9~11 시간 동안 양생시켜 건축내외벽용 경량기포콘크리트벽체 패널 구조체(1)를 얻었다.After the assembly of the aluminum extrusion bar, the cellulose fiber cement board 2 is mounted on both sides, and when the mold assembly is completed, the mold is transferred by a mixing process, and between the cellulose fiber cement board 2 and the board 2 fixed to the mold After filling the styrofoam mixed foam concrete (3) mortar prepared in the above to finish the casting, transfer the mold to the curing room for 9 to 11 hours at 30-40 ℃ to light weight foam concrete wall panel structure for building interior and exterior walls (1) Got.
상기의 방법으로 얻어진 건축내외벽용 경량기포콘크리트벽체 패널 구조체(1)는 셀룰로오스화이버 시멘트 보드(2)와 보드(2) 사이에 스티로폼혼합 기포콘크리트(3)를 주입하여 양생 후 탈형시켜 제조함으로써 경량화, 내화, 차음 및 단열 기능 및 내수 · 내구성이 뛰어나고, 또한 현장 가공이 용이하다.The lightweight foamed concrete wall panel structure (1) for building interior and exterior walls obtained by the above method is manufactured by injecting styrofoam mixed foamed concrete (3) between cellulose fiber cement board (2) and the board (2), and then demolding and curing them to reduce weight. It is excellent in fireproof, sound insulation and heat insulation, waterproof and durable, and easy to work on site.
이상 설명한 바와 같이, 본 발명은 대형 몰드에 셀룰로오스화이버 시멘트보드(cellulose fiber cement board)를 장착하여 액체(solution)상태의 스티로폼 혼합 기포콘크리트 모르타르(mortar)를 타설하고, 이를 고온의 양생실에서 단시간 양생시켜 제조함으로써 생산성과 경제성이 우수하고, 내수 · 내구성이 뛰어나며, 현장 가공이 용이하고, 충격에 의한 탈착현상을 방지할 수 있다.As described above, the present invention is to install a cellulose fiber cement board in a large mold to pour the foamed styrofoam mixed foam concrete mortar (solution), which is cured in a hot curing room for a short time It can be manufactured by making it so that it is excellent in productivity and economical efficiency, excellent in water resistance and durability, easy to work on site, and can be prevented from desorption by impact.
또한, 고온에서 단시간 양생함으로써 양생시간을 단축시켜 인건비와 건축비를 훨씬 줄일 수 있고, 신속한 시공으로 건설업체의 경쟁력을 기할 수 있다.In addition, by curing at a high temperature for a short time, the curing time can be shortened, thereby reducing labor and construction costs even more, and it is possible to give a construction company a competitive edge through rapid construction.
뿐만 아니라 제품이 가벼워 설치 시공이 간편하며, 방음 및 단열 효과도 매우 우수하다. In addition, the product is light and easy to install, and the sound insulation and insulation effect is very good.
도 1은 본 발명의 실시예에 의해 제작된 경량기포콘크리트벽체의 패널 구조체를 나타낸 단면도이다.1 is a cross-sectional view showing a panel structure of a lightweight foam concrete wall produced according to an embodiment of the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
1 : 경량기포콘크리트벽체의 패널 구조체1: Panel structure of lightweight foam concrete wall
2 : 셀룰로오스화이버 시멘트보드(cellulose fiber cement board)2: cellulose fiber cement board
3 : 스티로폼혼합 기포콘크리트3: Styrofoam mixed foam concrete
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| KR1020030069876A KR20050034072A (en) | 2003-10-08 | 2003-10-08 | Light weight bubble concrete wall panel construction and the manufacture method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110011324A1 (en) * | 2009-07-20 | 2011-01-20 | Johnny Jones | Floatable vessel |
| KR20160082424A (en) * | 2014-12-30 | 2016-07-08 | 평택대학교 산학협력단 | Lightweight concrete panel having finishing material composition for building and finishing panel comprising the same |
| CN107672006A (en) * | 2017-09-22 | 2018-02-09 | 盐城绿宝石新型墙体材料有限公司 | A kind of preparation maintenance process of cement foaming material |
| KR102135136B1 (en) * | 2019-10-15 | 2020-07-17 | 엠알산업(주) | The light weight block using the waste flame retardant styrofoam material recycled aggregate |
| KR20200100278A (en) * | 2019-02-18 | 2020-08-26 | 주식회사 디오텍코리아 | Apparatus for manufacturing interdental hygiene equipment and method thereof |
| KR102236618B1 (en) * | 2020-03-19 | 2021-04-06 | 오민기 | Lightweight Concrete Block Manufacturing Method |
| KR102296598B1 (en) * | 2021-02-05 | 2021-08-31 | 오경근 | Lightweight Cement Block |
| CN118756892A (en) * | 2024-08-06 | 2024-10-11 | 江苏叙施建筑科技有限公司 | A color-changing concrete wallboard based on construction waste and preparation method thereof |
-
2003
- 2003-10-08 KR KR1020030069876A patent/KR20050034072A/en not_active Application Discontinuation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110011324A1 (en) * | 2009-07-20 | 2011-01-20 | Johnny Jones | Floatable vessel |
| KR20160082424A (en) * | 2014-12-30 | 2016-07-08 | 평택대학교 산학협력단 | Lightweight concrete panel having finishing material composition for building and finishing panel comprising the same |
| CN107672006A (en) * | 2017-09-22 | 2018-02-09 | 盐城绿宝石新型墙体材料有限公司 | A kind of preparation maintenance process of cement foaming material |
| KR20200100278A (en) * | 2019-02-18 | 2020-08-26 | 주식회사 디오텍코리아 | Apparatus for manufacturing interdental hygiene equipment and method thereof |
| KR102135136B1 (en) * | 2019-10-15 | 2020-07-17 | 엠알산업(주) | The light weight block using the waste flame retardant styrofoam material recycled aggregate |
| KR102236618B1 (en) * | 2020-03-19 | 2021-04-06 | 오민기 | Lightweight Concrete Block Manufacturing Method |
| KR102296598B1 (en) * | 2021-02-05 | 2021-08-31 | 오경근 | Lightweight Cement Block |
| CN118756892A (en) * | 2024-08-06 | 2024-10-11 | 江苏叙施建筑科技有限公司 | A color-changing concrete wallboard based on construction waste and preparation method thereof |
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