KR0130401B1 - Cement mortars composition - Google Patents
Cement mortars compositionInfo
- Publication number
- KR0130401B1 KR0130401B1 KR1019950003856A KR19950003856A KR0130401B1 KR 0130401 B1 KR0130401 B1 KR 0130401B1 KR 1019950003856 A KR1019950003856 A KR 1019950003856A KR 19950003856 A KR19950003856 A KR 19950003856A KR 0130401 B1 KR0130401 B1 KR 0130401B1
- Authority
- KR
- South Korea
- Prior art keywords
- admixture
- concrete
- cement
- present
- cement mortar
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- 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
- C04B22/0093—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
- C04B22/062—Oxides, Hydroxides of the alkali or alkaline-earth metals
- C04B22/064—Oxides, Hydroxides of the alkali or alkaline-earth metals of the alkaline-earth metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/14—Acids or salts thereof containing sulfur in the anion, e.g. sulfides
- C04B22/142—Sulfates
- C04B22/148—Aluminium-sulfate
-
- 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
- C04B2103/40—Surface-active agents, dispersants
- C04B2103/408—Dispersants
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant 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
- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/16—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 calcium sulfate cements containing anhydrite, e.g. Keene's cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
제1도는 본 발명의 무수축 혼화제를 첨가한 콘크리트의 팽창성을 나타내는 도포.1 is a coating showing the expandability of the concrete to which the non-shrinkable admixture of the present invention is added.
제2도는 종래 콘크리트의 주사형 현미경 사진.2 is a scanning micrograph of a conventional concrete.
제3도는 본 발명의 무수축 혼화제를 첨가한 콘크리트의 주사형 현미경 사진.3 is a scanning micrograph of concrete to which the non-contraction admixture of the present invention is added.
본 발명은 시멘트 몰탈 및 콘크리트 건조시 발생하는 수축균열을 방지하는 균열방지용 무수축 혼화제에 관한 것이다.The present invention relates to a non-shrinkable admixture for preventing cracks to prevent shrinkage cracks generated during cement mortar and concrete drying.
시멘트 몰탈 및 콘크리트는 일반적으로 타설 직후에는 습하고 가소성의 유동체이나 응결되면서 건조되므로 언제나 인장응력이 작용하여 균열이 발생하게 된다. 이러한 균열은 여러 가지 복합적인 원인에 의해 발생하지만 그 중 가장 큰 영향을 미치는 것은 건조시의 수축에 의한 균열이다.Cement mortar and concrete are generally moist and plastic fluids or condensation drying immediately after casting, so that tensile stress always acts and causes cracking. These cracks are caused by a number of complex causes, but the most influential ones are cracks due to shrinkage during drying.
시멘트 몰탈 및 콘크리트의 균열은 구조물이나 건축물의 내구성을 약하게 할 뿐만 아니라 주택이나 아파트 방바닥의 경우 균열로 인하여 방바닥이 들뜨는 문제점이 있고 방수, 단열, 보온 등에 심각한 문제를 야기시키게 된다. 더구나, 콘크리트를 사용하는 대형 구조물들에서의 균열은 심각한 대형사고를 유발하게 된다.Cement mortar and concrete cracks not only weaken the durability of the structure or building, but also causes problems in the floor of the house or apartment floor due to the cracks, causing serious problems such as waterproofing, insulation, insulation. Moreover, cracks in large structures that use concrete will cause serious accidents.
종래 주택이나 아파트의 방바닥에는 철망이나 섬유 등의 보강재를 사용하므로서 균열을 막고자 하였으나, 이는 공사비용만 상승시켰을 뿐 만족할 만한 효과를 얻지 못하였다.Conventionally, the floor of a house or apartment was used to prevent cracking by using a reinforcement such as wire mesh or fiber, but this only increased the construction cost and did not obtain a satisfactory effect.
미국, 일본 등에서는 팽창제를 사용하여 균열을 막고자 시도하여 왔으며, 일본 특허 공보 소화 58-24225, 60293, 119563, 119562, 107528, 56-50768, 60293호 및 소화 54-110903호 등에는 칼슘 설포 알루미네트를 이용하여 시멘트 수화시 에트링가이들 생성시켜 팽창을 유도하거나 생석회의 반응을 이용하여 팽창을 유도하므로서 시멘트 몰탈 또는 콘크리트의 건주수축을 보상하는 방법이 개발되었으나, 이는 팽창이 완결되는 시간의 조절이 어렵고 온도, 습도에 대한 영향이 크므로 우리나라와 같이 4계절이 뚜렷한 곳에서는 효과가 적은 것이 단점이다.In the United States and Japan, attempts have been made to prevent cracking using expansion agents. Calcium sulfoalumina is disclosed in Japanese Patent Publications No. 58-24225, 60293, 119563, 119562, 107528, 56-50768, 60293 and No. 54-110903. A method was developed to compensate for cement mortar or dry shrinkage of concrete by inducing expansion by generating etring guides during cement hydration using nets or by inducing expansion using quicklime reactions. It is difficult and the effect on temperature and humidity is large, so the effect is less in four distinct seasons like Korea.
따라서, 본 발명의 목적은 어떠한 조건에서도 균열을 방지할 수 있는 시멘트 몰탈 및 콘크리트의 균열방지용 무수축 혼화제를 제공하는 데 있다.Accordingly, it is an object of the present invention to provide a non-shrinkable admixture for preventing cracking of cement mortar and concrete that can prevent cracking under any conditions.
상기 목적 뿐만 아니라 용이하게 표출될 수 있는 또다른 목적을 달성하기 위하여 본 발명에서는 에트링가이트의 생성을 시멘트 수화반응 초기에 완결시킬 수 있도록 황산 알루미늄과 중금속 산화물인 중크롬산 칼륨을 첨가하고 저급 지방산 알콜 알킬 에테르를 사용하여 몰탈 및 콘크리트의 수축을 저감시키도록 유도하여 어떠한 조건에서도 균열을 방지할 수 있도록 하였다.In order to achieve the above object as well as another object that can be easily expressed in the present invention, aluminum bisulfate and potassium dichromate, which are heavy metal oxides, are added to lower the fatty acid alcohol alkyl so as to complete the production of ettringite early in the cement hydration reaction. Ether was used to reduce the mortar and shrinkage of the concrete to prevent cracking under any conditions.
본 발명을 좀 더 상세히 설명하면 다음과 같다.The present invention is described in more detail as follows.
본 발명의 시멘트 몰탈 및 콘크리트 균열방지용 무수축 혼화제는 칼슘 설포 알루미네이트 20wt%, 황산 알루미늄 19wt%, 무수 석고 40wt%, 생석회 17.5wt%, 저급 지방산 알콜 알킬 에테르 1wt%, 스테아린산염 0.5wt%, 고급 분산제 1wt% 및 중크롬산칼륨 1wt%로 구성된다.Cement mortar and non-condensing admixture for concrete crack prevention of the present invention is calcium sulfo aluminate 20wt%, aluminum sulfate 19wt%, anhydrous gypsum 40wt%, quicklime 17.5wt%, lower fatty acid alcohol alkyl ether 1wt%, stearic acid salt 0.5wt%, advanced 1 wt% dispersant and 1 wt% potassium dichromate.
본 발명의 시멘트 몰탈 및 콘크리트 균열방지용 무수축 혼화제는 공지와 칼슘 설포 알루미네이트와 생석회를 사용하고 에트링가이트의 생성이 시멘트 수화반응 초기에 완결되도록 황산 알루미늄 및 중크롬산칼륨을 도입하며 시멘트 몰탈 및 콘크리트의 수축을 저감시키기 위하여 저급 지방산 알콜 알길 에테르(poly oxyethylene alkylether)를 사용하여 제조한다.In the present invention, cementless mortar and non-condensing admixture for preventing cracking of concrete use aluminum sulfide and calcium sulfo aluminate and quicklime, and introduce aluminum sulfate and potassium dichromate so that the production of ettringite is completed early in the cement hydration reaction. In order to reduce the shrinkage is prepared using a lower fatty acid alcohol allyl ether (poly oxyethylene alkylether).
다음의 실시예는 본 발명을 좀 더 상세히 설명하는 것이지만, 본 발명의 범주를 한정하는 것은 아니다.The following examples illustrate the invention in more detail, but do not limit the scope of the invention.
(실시예 1)(Example 1)
칼슘 설포 알루미네이트 800kg, 황산 알루미늄 760kg, 무수 석고 1,600kg, 생석회 700kg, 저급 지방산 알콜 알킬 에테르 40kg, 스테아린산염 20kg, 고급 분산제 40kg 및 중크롬산칼륨 40kg을 잘 혼합하여 본 발명의 시멘트 몰탈 및 콘크리트 균열방지용 무수축 혼화제를 제조한 다음, 이를 시멘트 : 모래=l : 3의 비율로 혼합된 시멘트 몰탈에 첨가하되 시멘트 사용량에 대하여 5wt%의 비율로 첨가하여 잘 혼합한 후, 물/시멘트=70%가 되도록 물을 첨가한 다음, 타설하고 건조시켜 균열 여부시험을 행하고, 혼화제가 첨가되지 않은 종래의 콘크리트와 비교 시험을 하였으며, 그 결과를 표 1 및 제1도에 기재, 도시하였다.Calcium sulfo aluminate 800kg, aluminum sulfate 760kg, anhydrous gypsum 1,600kg, quicklime 700kg, lower fatty acid alcohol alkyl ether 40kg, stearate 20kg, advanced dispersant 40kg and potassium dichromate 40kg are well mixed to prevent mortar and concrete cracking of the present invention After the shrinkage admixture was prepared, it was added to the cement mortar mixed in the ratio of cement: sand = l: 3 and mixed at a ratio of 5 wt% based on the amount of cement used and mixed well, followed by water / cement = 70%. Was added, and then poured and dried to perform a crack test, and compared with conventional concrete without admixtures, and the results are shown and shown in Table 1 and FIG.
[표 1]TABLE 1
상기의 표 1로부터 알 수 있는 바와 같이 본 발명의 무수축 혼화제가 첨가된 콘크리트는 건조 7일에 팽창성이 우수하였고 건조 28일 이후에는 수축성을 나타내는 것이 밝혀져 종래의 혼화제 미첨가 콘크리트에 비하여 수축균열을 방지하는 효과를 얻을 수 있었다.As can be seen from Table 1, the concrete to which the non-shrink admixture of the present invention is added has excellent expandability at 7 days of drying and exhibits shrinkage after 28 days of drying, thereby reducing shrinkage cracking compared to conventional admixture-free concrete. The effect of preventing was obtained.
또한, 종래의 콘크리트와 본 발명의 혼화제가 첨가된 콘크리트를 주사형 전자 현미경으로 관찰한 결과, 제2도에 도시한 바와 같이 종래의 콘크리트에는 미수화 물질이 남아 있음을 알 수 있고, 제3도로 부터 본 발명의 무수축 혼화제가 첨가된 콘크리트는 초기에 에트링가이트 결점이 생성되어 있음을 알 수 있었다.In addition, as a result of observing the conventional concrete and the concrete to which the admixture of the present invention is added by scanning electron microscopy, it can be seen that as shown in FIG. 2, the unhydrated material remains in the conventional concrete. From the concrete to which the non-shrinkable admixture of the present invention was found that the Ettlingite defects were initially generated.
한편, 실제로 아파트 신축현장에서 아파트 방바닥 미장에 본 발명의 무수축 혼화제를 첨가한 몰탈을 사용한 결과 상기와 같이 건초 초기에 우수한 팽창성을 얻을 수 있음을 알 수 있었다.On the other hand, as a result of using the mortar in which the non-shrinkable admixture of the present invention is added to the plastering of the apartment floor at the apartment construction site, it can be seen that excellent expandability can be obtained at the early stage of hay.
따라서, 본 발명의 균열방지용 무수축 혼화제가 시멘트 몰탈 또는 콘크리트에 첨가되어 사용되면 시멘트 몰탈 또는 콘크리트 건조시 수축균열을 방지하는 데 탁월한 효과가 있음을 알 수 있다.Therefore, when the non-shrinkable admixture for preventing cracks of the present invention is used in addition to cement mortar or concrete, it can be seen that there is an excellent effect in preventing shrinkage cracking during cement mortar or concrete drying.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950003856A KR0130401B1 (en) | 1995-02-27 | 1995-02-27 | Cement mortars composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950003856A KR0130401B1 (en) | 1995-02-27 | 1995-02-27 | Cement mortars composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960031383A KR960031383A (en) | 1996-09-17 |
| KR0130401B1 true KR0130401B1 (en) | 1998-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950003856A KR0130401B1 (en) | 1995-02-27 | 1995-02-27 | Cement mortars composition |
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| Country | Link |
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| KR (1) | KR0130401B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100385815B1 (en) * | 2000-04-21 | 2003-06-02 | 이득한 | CSA system water proofing materials for anti-caustic concrete |
| KR20030044650A (en) * | 2001-11-30 | 2003-06-09 | (주) 세일콘 | Compositions of Cement-Based Injection Grout Having Rapid Hardening Rate |
| KR20210079913A (en) | 2019-12-20 | 2021-06-30 | 대호산업개발(주) | Cement concrete admixture composition loaded coal combustion high carbon fly-ash |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100407668B1 (en) * | 1995-12-30 | 2004-07-23 | 금강종합건설 주식회사 | Cement-based mortar composition having fast curing property and self leveling property |
| JP3785985B2 (en) * | 2001-10-22 | 2006-06-14 | ボッシュ株式会社 | Booster valve mechanism |
-
1995
- 1995-02-27 KR KR1019950003856A patent/KR0130401B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100385815B1 (en) * | 2000-04-21 | 2003-06-02 | 이득한 | CSA system water proofing materials for anti-caustic concrete |
| KR20030044650A (en) * | 2001-11-30 | 2003-06-09 | (주) 세일콘 | Compositions of Cement-Based Injection Grout Having Rapid Hardening Rate |
| KR20210079913A (en) | 2019-12-20 | 2021-06-30 | 대호산업개발(주) | Cement concrete admixture composition loaded coal combustion high carbon fly-ash |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960031383A (en) | 1996-09-17 |
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