KR19990081497A - Air entrainer for fly ash containing cement composition - Google Patents

Air entrainer for fly ash containing cement composition Download PDF

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KR19990081497A
KR19990081497A KR1019980015502A KR19980015502A KR19990081497A KR 19990081497 A KR19990081497 A KR 19990081497A KR 1019980015502 A KR1019980015502 A KR 1019980015502A KR 19980015502 A KR19980015502 A KR 19980015502A KR 19990081497 A KR19990081497 A KR 19990081497A
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fly ash
air
containing cement
air entrainer
cement composition
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KR1019980015502A
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KR100262724B1 (en
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박병욱
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박병욱
한국후라이애쉬시멘트공업주식회사
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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
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • 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
    • C04B2103/304—Air-entrainers
    • 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

Abstract

본 발명은 플라이 애쉬 함유 시멘트 조성물용 공기연행제에 관한 것으로, 0-50중량% 에톡시화 알콜과 50-100중량%의 글루코시드로 구성되는 것을 특징으로 한다.The present invention relates to an air entrainer for fly ash-containing cement compositions, characterized in that it consists of 0-50% by weight ethoxylated alcohol and 50-100% by weight glucoside.

Description

플라이 애쉬 함유 시멘트 조성물용 공기연행제Air entrainer for fly ash containing cement composition

본 발명은 플라이 애쉬 함유 시멘트 조성물용 공기연행제에 관한 것이며, 더욱 상세하게는 글루코시드와 에톡시화 알콜의 혼합물로 구성되는 플라이 애쉬 함유 시멘트 조성물용 공기연행제에 관한 것이다.The present invention relates to an air entrainer for fly ash containing cement compositions, and more particularly to an air entrainer for fly ash containing cement compositions composed of a mixture of glucoside and ethoxylated alcohol.

플라이애쉬 함유 시멘트 조성물은 플라이 애쉬를 함유하는 시멘트를 수경성 결합제로 하여 물 및 골재와 혼합함으로써 얻어지는 몰타르 또는 콘크리트를 의미한다. 플라이 애쉬 시멘트를 사용하는 이유는 시멘트 대체제로서 저렴한 플라이 애쉬를 사용함으로써 비용을 절감하고 환경을 보호하는데도 도움이 된다는 점 때문이다. 그러나, 플라이 애쉬 함유 시멘트 조성물은 혼합직후부터 시공완료 사이의 기간 중에 연행 공기함량의 저하(air loss)가 크다고 하는 특징을 갖는다.By fly ash containing cement composition is meant mortar or concrete obtained by mixing cement containing fly ash with water and aggregate using a hydraulic binder. The use of fly ash cement is due to the use of inexpensive fly ash as a cement substitute, which helps to reduce costs and protect the environment. However, the fly ash-containing cement composition is characterized by a large air loss in the entrained air content during the period between mixing and completion of construction.

이 결점을 극복하기 위해 폴리옥시에틸렌 알킬 에테르 술페이트 등의 여러 공기 연행제가 사용되어 왔으나, 공기연행제의 양을 다량 사용하여야 하고 연행 공기함량의 저하를 효율적으로 막지 못하는 결점이 있었다.Various air entrainers such as polyoxyethylene alkyl ether sulphate have been used to overcome this drawback, but there is a drawback in that a large amount of air entrainer must be used and the entrainment air content cannot be effectively prevented.

따라서, 본 발명의 목적은 적은량으로 플라이 애쉬 함유 시멘트 조성물의 연행공기함량의 저하를 효율적으로 방지할 수 있는 공기연행제 조성물을 제공하는 것이다.Accordingly, it is an object of the present invention to provide an air entrainer composition which can effectively prevent a decrease in the entrained air content of a fly ash-containing cement composition.

상기한 본 발명의 목적은 0-50중량% 에톡시화 알콜과 50-100중량%의 글루코시드로 구성되는 것을 특징으로 하는 플라이 애쉬 함유 시멘트 조성물용 공기연행제에 의해 달성된다.The above object of the present invention is achieved by an air entrainer for fly ash-containing cement composition, characterized by consisting of 0-50% by weight ethoxylated alcohol and 50-100% by weight glucoside.

이하 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail.

에톡시화 알콜은 그 자체로는 유용한 공기연행제가 아닐 뿐 아니라, 사용 비율이 높아지면 콘크리크 배합에 있어서 점착력을 저감시킨다. 따라서, 50중량 % 미만의 양으로 포함시키는 것이 바람직하다. 글루코시드에 첨가되어 공기포를 안정화시키는 역할을 한다.Ethoxylated alcohol is not a useful air entrainer by itself, but as the use ratio increases, it reduces the adhesive force in the concrete mix. Therefore, it is preferable to include in an amount of less than 50% by weight. It is added to glucoside to stabilize air bubbles.

본 발명에 유용한 에톡시화 알콜의 예로는 에톡시에탄올, 에톡시프로판올, 에톡시부탄올 등이 있으며, 에톡시에탄올이 특히 바람직하다.Examples of ethoxylated alcohols useful in the present invention include ethoxyethanol, ethoxypropanol, ethoxybutanol and the like, with ethoxyethanol being particularly preferred.

글루코시드는 본 발명에 실질적으로 공기연행제로서의 작용을 하는 화합물이며, 에톡시화 알콜 없이 단독으로도 사용할 수 있으나, 50중량% 미만의 에톡시화 알콜과 함께 사용되는 것이 바람직하며, 50중량%의 에톡시화 알콜과 50중량% 글루코시드 혼합물을 사용하는 것이 가장 바람직하다.Glucoside is a compound which functions substantially as an air entrainer in the present invention, and can be used alone without ethoxylated alcohol, but is preferably used with less than 50% by weight of ethoxylated alcohol, and 50% by weight of ethoxylation. Most preferably, an alcohol and 50% by weight glucoside mixture is used.

본 발명의 공기연행제를 사용하게 되면 4.88% 내지 촤고 10.22%의 강열감량(탄소함량)을 갖는 플라이 애쉬를 약 20%까지 포틀랜드 시멘트에 대체하여 사용하여도 플라이 애쉬 함유 시멘트 조성물이 약 7%의 공기함량을 유지하게 된다.When the air entrainer of the present invention is used, the fly ash-containing cement composition has a fly ash-containing cement composition of about 7% even when the fly ash having a ignition loss (carbon content) of 4.88% to 10.22% is replaced with portland cement. Maintain air content.

이 때 사용되는 공기연행제의 양은 플라이 애쉬 함유 시멘트 조성물 전체에 대해 약 0.02 내지 0.06%의 양으로 사용된다.The amount of air entrainer used at this time is used in an amount of about 0.02 to 0.06% of the total fly ash-containing cement composition.

본 발명에 유용한 글루코시드는 α-글루코피라노실-α-D-글루코피라노시드(트레할로스), 7-글루코시도-8-히드록시 쿠마린(다핀) 등이 있다.Glucosides useful in the present invention include α-glucopyranosyl-α-D-glucopyranoside (trehalose), 7-glucosido-8-hydroxy coumarin (daffin) and the like.

이하 본 발명을 실시예에 의해 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

실시예 1Example 1

물 9.84kg, 포틀랜드 시멘트 20kg, 모래 40kg, 자갈 64.8kg, 강열감량 4.88%의 플라이 애쉬 3.2kg, 감수제 160㎖, 트레할로스 3㎖ 및 에톡시에탄올 3㎖를 혼합하여 콘크리트 혼합 조성물을 제조하였다. 플라이 애쉬의 시멘트 치환율은 13.8%였다.Concrete mixture composition was prepared by mixing 9.84 kg of water, 20 kg of Portland cement, 40 kg of sand, 64.8 kg of gravel, 3.2 kg of fly ash of 4.88% ignition loss, 160 ml of reducing agent, 3 ml of trehalose and 3 ml of ethoxyethanol. The cement substitution rate of the fly ash was 13.8%.

(1) 공기함량의 측정(1) Measurement of air content

KS 2421 굳지 않은 콘크리트 압력법에 의한 공기함유량 시험방법(공기실 압력방법)에 의해 굳지 않은 콘크리트의 공기함량을 측정하였다. 결과는 표 1에 게재하였다.The air content of the unconsolidated concrete was measured by the air content test method (air chamber pressure method) by the KS 2421 unconsolidated concrete pressure method. The results are shown in Table 1.

(2) 슬럼프의 측정(2) measurement of slump

혼합직후의 굳지 않은 콘크리트의 슬럼프를 ASTM C143에 의해 측정하였다. 결과는 표 1에 게재하였다.The slump of the unconsolidated concrete immediately after mixing was measured by ASTM C143. The results are shown in Table 1.

(3) 압축강도의 측정(3) Measurement of compressive strength

혼합 후 7일, 28일, 180일 경과후의 압축강도를 ASTM C39에 의해 측정하여 표 1에 게재하였다.The compressive strengths after 7 days, 28 days, and 180 days after mixing were measured by ASTM C39 and listed in Table 1.

실시예 2Example 2

물 9.84kg, 포틀랜드 시멘트 20kg, 모래 40kg, 자갈 64.8kg, 강열감량 10.22%의 플라이 애쉬 3.2kg, 감수제 220㎖, 다핀 7㎖ 및 에톡시 에탄올 7㎖를 혼합하여 콘크리트 혼합 조성물을 제조하였다. 플라이 애쉬의 시멘트 치환율은 13.8%였다.Concrete mixture composition was prepared by mixing 9.84 kg of water, 20 kg of Portland cement, 40 kg of sand, 64.8 kg of gravel, 3.2 kg of fly ash with a 10.22% loss of ignition, 220 ml of reducing agent, 7 ml of daffin, and 7 ml of ethoxyethanol. The cement substitution rate of the fly ash was 13.8%.

실시예 1과 동일한 방법으로, 공기함량, 슬럼프, 압축강도를 측정하여 각각 표 1에 기재하였다.In the same manner as in Example 1, the air content, the slump and the compressive strength were measured and listed in Table 1, respectively.

또, ASTM C666에 의한 동결융해 저항성을 측정한 결과 표면 스케일링 정도가 0으로 나타났으며, ASTM C672에 의한 내염해성 시험을 한 결과 표면 스케일링에 의한 중량 손실은 910g/㎡였다.As a result of measuring freeze-thaw resistance according to ASTM C666, the degree of surface scaling was found to be 0. As a result of the salt resistance test according to ASTM C672, the weight loss due to surface scaling was 910 g / m 2.

실시예 3Example 3

물 9.84kg, 포틀랜드 시멘트 20kg, 모래 40kg, 자갈 64.8kg, 강열감량 9.87%의 플라이 애쉬 3.2kg, 감수제 220㎖, 트레할로스 6㎖를 혼합하여 콘크리트 혼합 조성물을 제조하였다. 플라이 애쉬의 시멘트 치환율은 13.8%였다.Concrete was prepared by mixing 9.84 kg of water, 20 kg of Portland cement, 40 kg of sand, 64.8 kg of gravel, 3.2 kg of fly ash of 9.87% ignition loss, 220 ml of reducing agent, and 6 ml of trehalose. The cement substitution rate of the fly ash was 13.8%.

실시예 1과 동일한 방법으로, 공기함량, 슬럼프, 압축강도를 측정하여 각각 표 1에 기재하였다.In the same manner as in Example 1, the air content, the slump and the compressive strength were measured and listed in Table 1, respectively.

또, ASTM C666에 의한 동결융해 저항성을 측정한 결과 표면 스케일링 정도가 0으로 나타났으며, ASTM C672에 의한 내염해성 시험을 한 결과 표면 스케일링에 의한 중량 손실은 1386g/㎡였다.As a result of measuring freeze-thaw resistance according to ASTM C666, the degree of surface scaling was found to be 0. As a result of the salt resistance test according to ASTM C672, the weight loss due to surface scaling was 1386 g / m 2.

실시예 4Example 4

물 9.84kg, 포틀랜드 시멘트 23.2kg, 모래 40kg, 자갈 64.8kg, 감수제 160㎖, 다핀 6㎖를 혼합하여 콘크리트 혼합 조성물을 제조하였다. 플라이 애쉬의 시멘트 치환율은 19.8%였다.9.84 kg of water, 23.2 kg of Portland cement, 40 kg of sand, 64.8 kg of gravel, 160 ml of water reducing agent, and 6 ml of daffin were mixed to prepare a concrete mixing composition. The cement substitution rate of the fly ash was 19.8%.

실시예 1과 동일한 방법으로, 공기함량, 슬럼프, 압축강도를 측정하여 각각 표 1에 기재하였다.In the same manner as in Example 1, the air content, the slump and the compressive strength were measured and listed in Table 1, respectively.

또, ASTM C666에 의한 동결융해 저항성을 측정한 결과 표면 스케일링 정도가 1로 나타났으며, ASTM C672에 의한 내염해성 시험을 한 결과 표면 스케일링에 의한 중량 손실은 70g/㎡였다.As a result of measuring freeze-thaw resistance according to ASTM C666, the degree of surface scaling was found to be 1, and the weight loss due to surface scaling was 70 g / m 2 as a result of the salt resistance test according to ASTM C672.

비교예 1Comparative Example 1

물 9.84kg, 포틀랜드 시멘트 20kg, 모래 40kg, 자갈 64.8kg, 강열감량 9.80%의 플라이 애쉬 4.6kg, 감수제 220㎖, Daravair-1400 공기연행제 6㎖를 혼합하여 콘크리트 혼합 조성물을을 제조하였다.Concrete was prepared by mixing 9.84 kg of water, 20 kg of Portland cement, 40 kg of sand, 64.8 kg of gravel, 4.6 kg of fly ash with a loss of ignition of 9.80%, 220 ml of water reducing agent, and 6 ml of Daravair-1400 air emulsifier.

실시예 1과 동일한 방법으로, 공기함량, 슬럼프, 압축강도를 측정하여 각각 표 1에 기재하였다.In the same manner as in Example 1, the air content, the slump and the compressive strength were measured and listed in Table 1, respectively.

또, ASTM C666에 의한 동결융해 저항성을 측정한 결과 표면 스케일링 정도가 2로 나타났으며, ASTM C672에 의한 내염해성 시험을 한 결과 표면 스케일링에 의한 중량 손실은 135g/㎡였다.In addition, as a result of measuring the freeze-thaw resistance according to ASTM C666, the degree of surface scaling was 2, and the weight loss due to surface scaling was 135 g / m 2 as a result of the salt resistance test according to ASTM C672.

실시예 번호Example number 혼합상태Mixed state 공기함량(%)Air content (%) 슬럼프(mm)Slump (mm) 압축강도(MPa)Compressive strength (MPa) 7일7 days 28일28 days 180일180 days 실시예 1Example 1 양호Good 5.35.3 135135 32.732.7 44.244.2 50.750.7 실시예 2Example 2 양호Good 7.07.0 120120 33.233.2 44.244.2 50.750.7 실시예 3Example 3 양호Good 7.27.2 100100 31.331.3 41.241.2 56.356.3 실시예 4Example 4 양호Good 7.07.0 7575 30.530.5 43.343.3 55.155.1 비교예 1Comparative Example 1 양호Good 7.27.2 8080 39.039.0 44.944.9 50.150.1

상기 표 1에서 알 수 있는 바와 같이 본 발명의 공기연행제를 사용하는 경우As can be seen in Table 1, when using the air entrainer of the present invention

강열감량 4.88-10.22%의 플라이 애쉬로 약 20%까지 시멘트를 대치할 수 있음을 알 수 있다. 공기함량이 플라이 애쉬를 함유하지 않은 비교예와 비교할 때 전혀 떨어지지 않았고, 압축강도는 시간이 경과할수록 본 발명의 공기연행제를 함유한 콘크리트가 우수한 것으로 나타났다.It can be seen that the fly ash of 4.88-10.22% of ignition loss can replace cement by about 20%. The air content did not drop at all compared with the comparative example containing no fly ash, and the compressive strength was found to be superior to the concrete containing the air entrainer of the present invention over time.

또, 본 발명의 공기연행제를 사용한 시멘트 조성물은 모두 우수한 동결 융해저항성과 만족할만한 내염해성을 나타내었다. 동결융해시험에 있어서는 비교예의 플라이 애쉬를 사용하지 않은 대조군보다 우수한 저항성을 나타내었으나, 내염해서은 약간 낮은 것으로 나타났다.In addition, all the cement compositions using the air entrainer of the present invention exhibited excellent freeze-thawing resistance and satisfactory salt resistance. In the freeze-thawing test, it showed better resistance than the control group which did not use the fly ash of the comparative example, but was slightly lower in flame resistance.

상기한 바와 같이, 본 발명의 공기연행제를 사용하여 저가의 플라이 애쉬를 시멘트로 대체 사용함으로써 경비절감 및 자원 재활용을 기할 수 있다. 본 발명의 공기연행제는 전체 조성물을 기준으로 0.02 내지 0.06%의 함량으로 우수한 공기연행 효과를 나타낼 수 있다.As described above, by using the air emollient of the present invention to replace the low-cost fly ash with cement it is possible to reduce the cost and resource recycling. The air entrainer of the present invention can exhibit an excellent air entraining effect in an amount of 0.02 to 0.06% based on the total composition.

Claims (4)

0-50중량% 에톡시화 알콜과 50-100중량%의 글루코시드로 구성되는 것을 특징으로 하는 플라이 애쉬 함유 시멘트 조성물용 공기연행제.An air entrainer for fly ash-containing cement compositions, comprising 0-50% by weight ethoxylated alcohol and 50-100% by weight glucoside. 제 1 항에 있어서, 상기 에톡시화 알콜과 글루코시드의 배합비는 중량비로 1 : 1인 것을 특징으로 하는 플라이 애쉬 함유 시멘트 조성물용 공기연행제.The air entrainer for fly ash-containing cement composition according to claim 1, wherein the compounding ratio of the ethoxylated alcohol and glucoside is 1: 1. 제 1 항에 있어서, 상기 에톡시화 알콜은 에톡시에탄올, 에톡시프로판올, 에톡시부탄올로 구성되는 그룹으로부터 선택된 하나 이상의 화합물로 구성되는 것을 특징으로 하는 플라이 애쉬 함유 시멘트 조성물용 공기연행제.The air emulsifier for fly ash-containing cement composition according to claim 1, wherein the ethoxylated alcohol is composed of one or more compounds selected from the group consisting of ethoxyethanol, ethoxypropanol, and ethoxybutanol. 제 1 항에 있어서, 상기 글루코시드는 α-글루코피라노실-α-D-글루코피라노시드(트레할로스), 또는 7-글루코시도-8-히드록시 쿠마린(다핀), 또는 이들 화합물의 혼합물인 것을 특징으로 하는 플라이 애쉬 함유 시멘트 조성물용 공기연행제.The method of claim 1, wherein the glucoside is α-glucopyranosyl-α-D-glucopyranoside (trehalose), or 7-glucosido-8-hydroxy coumarin (daffin), or a mixture of these compounds. Air entrainer for fly ash-containing cement compositions.
KR1019980015502A 1998-04-30 1998-04-30 Air entring agent for fly ash cement mixture KR100262724B1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009085426A1 (en) * 2007-12-20 2009-07-09 Icrete Llc Concrete having high workability through control of fine-to-coarse particulates ratio
WO2009085434A1 (en) * 2007-12-21 2009-07-09 Icrete Llc Concrete optimized for high workability and high strength to cement ratio
WO2009085432A1 (en) * 2007-12-20 2009-07-09 Icrete Llc Highly workable concrete compositions having minimal bleeding and segregation
WO2009085431A1 (en) * 2007-12-21 2009-07-09 Icrete Llc Concrete optimized for high workability and high strength to cement ratio
WO2009085435A1 (en) * 2007-12-21 2009-07-09 Icrete Llc Concrete optimized for high workability and high strength to cement ratio
WO2009085425A1 (en) * 2007-12-20 2009-07-09 Icrete Llc Concrete compositions optimized for high workability

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009085426A1 (en) * 2007-12-20 2009-07-09 Icrete Llc Concrete having high workability through control of fine-to-coarse particulates ratio
WO2009085432A1 (en) * 2007-12-20 2009-07-09 Icrete Llc Highly workable concrete compositions having minimal bleeding and segregation
WO2009085425A1 (en) * 2007-12-20 2009-07-09 Icrete Llc Concrete compositions optimized for high workability
WO2009085434A1 (en) * 2007-12-21 2009-07-09 Icrete Llc Concrete optimized for high workability and high strength to cement ratio
WO2009085431A1 (en) * 2007-12-21 2009-07-09 Icrete Llc Concrete optimized for high workability and high strength to cement ratio
WO2009085435A1 (en) * 2007-12-21 2009-07-09 Icrete Llc Concrete optimized for high workability and high strength to cement ratio

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