• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2008년도 춘계 학술발표회 제20권1호
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• pp.1001-1004
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• 2008

본 연구는 한중환경에서 이중 버블시트를 이용한 단열보온 양생 공법을 슬래브 및 매스 콘크리트에 활용한 결과를 검토한 것이다. 먼저, 이중 버블시트를 적용한 경우 타설 후 2일까지 외기온이 영하$9^{\circ}C$까지 강하하는 경우에도 슬래브콘크리트는 영상 $6^{\circ}C$에서 $10^{\circ}C$이상을 유지하여 초기동해가 방지됨을 알 수 있었고, 매스콘크리트의 경우에는 중심부 최고온도와 표층부 최고온도차이가 $6^{\circ}C$이하로 나타나 내부구속에 의한 수화열 균열은 발생하지 않은 것으로 판단된다. 본 현장에 적용된 이중버블시트를 이용한 단열보온양생 공법은 동절기 영하에서도 안정된 양생온도 관리로 초기동해를 방지할 수 있었고, 소요강도를 확보할 수 있었다. 또한, 가시설의 설치 해체 공정을 줄여 공기단축 효과와 인건비절감등 양생비용의 감소로써 한중콘크리트의 품질확보에 우수한 효과가 있음과 동시에 단열 양생공법의 경제성이 입증되었다.

• 한국건축시공학회지
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• 제17권5호
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• pp.419-427
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• 2017

동절기에 콘크리트를 시공할 경우 초기동해와 강도발현이 지연되는 문제가 있으며, 이를 방지하기 위해서는 콘크리트가 동결하기 이전에 시멘트의 수화반응이 일정수준 이하 진행되는 것이 중요하다. 이에 본 연구는 저온에서도 수화열이 높게 발생되는 $Al_2O_3$성분이 함량이 높은 CSA, 알루미나시멘트를 OPC에 치환하여 물성평가를 수행하였다. 그 결과 CSA, 알루미나시멘트를 사용하여 $-5^{\circ}C$의 저온환경에서 초기에 수화반응이 빠르게 진행되며, 급결현상 및 유동성저하현상이 발생되었고, 석고를 사용하여 응결시간을 지연하며 유동성을 확보하여 작업성을 개선하였다. 또한 단열양생공법을 적용하여 모르타르의 동결시간을 지연하였으며 수축보상효과를 증진시켰고 3일, 7일 강도가 증진되었다. 따라서 본 연구 결과 저온환경에서 CSA, 알루미나시멘트 및 석고를 사용하여 조기에 강도발현 증진효과가 우수하였으며, 석고 및 단열양생공법을 적용하여 작업성, 동결저항성, 조기강도 발현 성능이 개선되어 초기동해를 방지하는데 효과가 있을 것으로 판단된다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.227-228
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• 2023

This study is tocompare and analyze the results of hydration heat analysis and on-field measurements using the method with hydration heat difference and insulation curing method for controlling hydration heat in mass concrete. As a result of the analysis, the temperature difference between the center and the surface was predicted very similarly, and the mass concrete surface was controlled to a safe level when evaluating with a temperature crack index, and after being finished, it was confirmed that there was no hydration crack.

• 콘크리트학회지
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• 제18권6호
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• pp.51-59
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• 2006

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.57-60
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• 2008

This study investigated the results of insulation heat curing method using double layer bubble sheet in slab concrete and mass concrete in cold weather environment. First of all, when double bubble sheets are applied, it was shown that slab concrete was protected from early freezing by remaining between 6 and 15℃ even in case outside temperature drops -9℃ below zero until the 2nd day from piling, and in the case of mass concrete, with the maximum temperature difference between the center and surface less than 4℃, crack occurrence index was close to 2 and no hydration heat crack occurred by internal constraint. The insulation heat preservation curing method using the double bubble sheet applied in this field prevented early freezing owing to stable curing temperature management, deterring concrete strength development delay at low temperature, and obtained the needed strength. Also, it was proven that the method is highly effective and economic for cold weather concrete quality maintenance through curing cost reduction like construction period shortening and labor cost reduction, etc by reducing the process of temporary equipment installation and disassembling.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
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• pp.25-28
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• 2009

This study investigated the results of insulation heat curing method using double layer bubble sheet in slab concrete in cold weather environment. First of all, when double bubble sheets are applied, it was shown that slab concrete was protected from early freezing by remaining between 5 and $l0^{\circ}C$ even in case outside temperature drops $-11^{\circ}C$ below zero until the 4nd day from piling. The insulation heat preservation curing method using the double bubble sheet applied in this field prevented early freezing owing to stable curing temperature management, deterring concrete strength development delay at low temperature, and obtained the needed strength. Also, it was proven that the method is highly effective and economic for cold weather concrete quality maintenance through curing cost reduction like construction period shortening and labor cost reduction, etc by reducing the process of temporary equipment installation and disassembling.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2005년도 추계 학술논문 발표대회
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• pp.25-28
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• 2005

This study investigates the field application of surface insulation curing method, which combined double layer bubble sheet(DBS) and thick-curing-material(TCM) for cold weather concreting. According to the test, deck slab, curing only upper section with DBS and TCM, does not make big different temperature history with that, curing both upper and bottom section during daily average temperature 6.5t. It is concluded that combination of DBS and TCM in only upper section can be safely cured in early period of time during cold water concreting. The field test was carried out with this favourable data. The upper deck slab was insulated by combination of DBS and TCM, and the construction was surrounded by tent. in order to protect from outside wind. The test result shows that the lowest temperature of deck slab indicated 6$ ^{circ}C $. It demonstrated that this curing method can resist early frost and save construction cost in the side of management and saving labor cost, compared with previous method. In addition, the column specimen, combined both form and bubble board, exhibited favorable temperature history, due to internal hydration heat insulation effect.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2011년도 춘계 학술논문 발표대회 1부
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• pp.83-85
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• 2011

This study investigated the results of insulation heat curing method using double layer bubble sheet in concrete in cold weather environment. First of all, when double bubble sheets are applied, it was shown that concrete was protected from early freezing by remaining between 7℃ and 3℃ even in case outside temperature drops -7℃ below zero until the 3d day from piling. The insulation heat preservation curing method using the double bubble sheet applied in this field prevented early freezing owing to stable curing temperature management, deterring concrete strength development delay at low temperature, and obtained the needed strength. Also, it was proven that the method is highly effective and economic for cold weather concrete quality maintenance through curing cost reduction like construction period shortening and labor cost reduction, etc by reducing the process of temporary equipment installation and disassembling.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2010년도 춘계 학술대회 제22권1호
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• pp.445-446
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• 2010

본 연구는 최근 보편적으로 이루어지고 있는 한중콘크리트 시공에서 이중버블시트를 이용한 한중콘크리트 단열보온양생공법의 효용성 검증의 일환으로 이중버블시트에 물이 침투하였을 경우에 콘크리트의 온도이력과 강도특성을 분석하고자 하였다. 그 결과 시트내의 함수율 증가에 따른 영향은 거의 없는 것으로 분석되었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 추계 학술논문 발표대회 논문집
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• pp.29-32
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• 2006

Experimental test results of field construction, Cheongju University Educational Liberal Art Building, applying the insulating curing method on slab concrete showed that the quality of concrete in fresh and hardened state satisfied all target values. Temperature history of slab concrete in A and B area secured more than $7.8{\sim}9.2^{\circ}C$ higher than outside atmosphere. After completing certain curing period of time on the surface of the structure, crack occurrence was not found. It is concluded that the preventing vaporization of moisture by the insulating curing method reduces plastic and drying shrinkage as welt as improves durability.