굴 패각을 잔골재로 활용한 내화모르타르의 잔존강도 특성

정의인,김봉주,Jung, Ui-In,Kim, Bong-Joo 한국건축시공학회 2017 한국건축시공학회지 Vol.17 No.5

본 연구는 산업폐기물로 발생되는 굴 패각을 세척, 건조 및 가공하여 3개의 입도범위로 분급하였다. 이를 이용해 일정한 비율로 잔골재를 대체한 모르타르 실험체를 제작하였으며, 28일 재령을 기준으로 $300^{\circ}C$, $600^{\circ}C$, $900^{\circ}C$의 가열조건에 의해 실험체를 가열하였다. 재령 28일에서 Plain 휨 강도는 9.2MPa로 나타났으며, O 0.15에서는 대체율에 따라 7.9~4.4MPa로 나타났다. O 1.2~2.5에서는 대체율에 따라 7.7~4.4MPa으로 나타났으며, 마지막으로 O 2.5~5.0의 경우에는 대체율에 따라 8.8MPa,~6.1MPa로 나타났다. 재령 28일 압축강도의 경우, O 0.15에서는 대체율에 따라 23.6~43.2MPa의 차이를 나타냈으며, O 1.2~2.5에서는 대체율에 따라 20.4~45.1MPa의 차이로 나타났고, 마지막으로 O 2.5~5.0의 경우 17.1~40.4MPa의 차이가 나타났다. 가열을 통해 잔존강도를 측정한 결과 굴 패각 잔골재 O 0.15 이하를 100% 대체한 경우 강도감소율이 가장 낮은 것으로 나타났으며, 이러한 결과를 통해 굴 패각의 가공 및 적정 배합을 통한 내열성능 발휘가 가능할 것으로 예상된다. This study classified oyster shells that produced as a industrial waste into 3 distribution by washing, drying and processing them. Mortar specimens with a constant ratio by using this to substitute fine aggregates were made, and the specimens were heated under the heating conditions of $300^{\circ}C$, $600^{\circ}C$ and $900^{\circ}C$ based on the 28-day age. On the age of 28 days, the plain flexural strength was found to be 9.2MPa, and in O 0.15, it was shown to be 4.4~7.9MPa depending on the substitution rate. It was found to be 4.4~7.7MPa in O 1.2~2.5 depending on the substitution rate, and last but not least, it was shown to be 6.1~8.8MPa in case of O 2.5~5.0 depending on the substitution rate. In case of the compressive strength of the 28-day age, it showed the difference of 23.6~43.2MPa in O 0.15 depending on the substitution rate, and 20.4~45.1MPa in O 1.2~2.5 depending on the substitution rate, and last but not least, 17.1~40.4MPa in case of O 2.5~5.0. As a result of measuring the residual strength through heating, in case of substituting fine aggregates less than O 0.15 by 100%, it showed the lowest strength reduction ratio, and it is expected that the heat-resisting property could be achieved through processing and proper mixing of oyster shells through these results.

굴 패각을 잔골재로 사용한 모르타르의 질량비 변화에 따른 강도특성에 관한 연구

정의인 ( Jung Ui-in ),유남규 ( Yu Nam-gyu ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),최호림 ( Choi Ho-rim ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Oyster shell is produced by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to sand. So we produced mortar test using different law of multiple proportions of grounded oyster shell powder of its particle size according to fine aggregate standard and reviewed strength Properties.

굴 패각을 채움재로 사용한 모르타르의 섬유 혼입에 따른 강도특성에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),유남규 ( You Nam-gyu ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.2

Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. We produced mortar test piece using grounded oyster shell powder according to Filler and Fiber. So I wanted to measure the strength and use it as a baseline for follow-up studies.

HILS 시계열 데이터 이미지 변환을 이용한 CNN 기반 자동화 검증에 대한 연구

정의인(Ui-in Jung),김두기(Doogie Kim),백승빈(Seungbin Baek),황지은(Jieun Hwang),김범섭(Beomseop Kim) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11

In this paper, we propose a framework of automated validation for HILS test data that is time dependent based on CNN using image encoding. Recently, electric vehicles and automated driving technologies have developed and ECU in vehicles is more complex. As a result, validation of ECU in vehicles is becoming important. HILS can reduce time and resources for test and validation of ECU. But amount of test is increased rapidly. To solve these problem, automated validation for HILS test data is studying. But it is difficult to find that consider the time dependent characteristics of time series data. In the study, image encoding used on other engineering field is applied to convert multivariate HILS data to image and introduce framework of automated validation for HILS test data based on CNN through validation performance about MDPS HILS data.

커터 밀 인버터의 속도변화에 따른 굴 패각의 입도분포에 관한 연구

정의인 ( Jung Ui-in ),허민회 ( Heo Min-hoe ),유남규 ( Yu Nam-gyu ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),박정훈 ( Park Jung-hun ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Oyster shell is light weighted and its strength characteristic is similar to sand so we have reviewed to find its suitability of aggregate. Therefore we found fineness modulus and size distribution of oyster shell by grinding it with inverter cutter mill varying inverter speed and screening size. In our test, the fineness modulus has tendency of decrease in higher speed and tendency of increase in bigger diameter of screening size. 5∼2.5㎜, 2.5∼1.2㎜, 1.2∼0.6㎜, and below 0.6㎜ of oyster shell particle size could be used in further test for suitability of aggregate.

굴 패각과 건식공정 바텀애시를 사용한 내화보드의 가열실험

정의인 ( Ui-in Jung ),김봉주 ( Bong-joo Kim ),김진만 ( Jin-man Kim ) 한국건축시공학회 2016 한국건축시공학회지 Vol.16 No.3

This study is a research about performance of fireproof board using industrial waste such as oyster shell and dry process bottom ash through the heating test and conclusions were obtained as follows. Test samples show back side temperatures as follows : in 300℃, 103.1∼125.1℃, in 600℃, 201.1∼210.1℃, in 900℃, 249.2∼276.9℃. In the test, temperature increases of specimens of fireproof board are kept at certain temperatures hence it could be concluded that the specimens withstand high temperatures. According to the test, it could be concluded that fireproof board made by smaller particles shows better performance up to 600℃ while at higher temperatures, fireproof board made by bigger particles shows better performance. It is estimated that fireproof board made by particles of bigger size has more pore structure and it delays heat conduction.

분급된 굴 패각을 잔골재로 사용한 모르타르의 강도특성에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),최인권 ( Choi In-kwon ),김봉주 ( Kim Bong-joo ),원철희 ( Won Chul-hee ),박정훈 ( Park Jung-hun ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Oyster shell is produced by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and its strength characteristic is similar to sand. So we produced mortar test piece using grounded oyster shell powder under 0.6mm, 0.6~1.2mm, 1.2~2.5mm, 2.5~5.0mm of its particle size according to fine aggregate standard and reviewed strength Properties.

건물의 개구부 크기에 따른 외벽 수열온도분포에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2020 한국건축시공학회지 Vol.20 No.3

This study used a real-scale model experiment to reproduce internal fires in residential buildings such as a multi-dwelling unit, in order to prevent damage caused by tens of thousands of fires witnessed each year and to take measures to cope with them. For experimental conditions, different opening sizes were applied to measure and analyze the heating temperature of the exterior wall. Results drawn are as following: when the experiment was conducted with opening sizes(horizontal length) each at 2,000㎜, 1,600㎜, and 1,400㎜, the flashover occurred at 630 seconds, 505 seconds and 510 seconds, respectively. Also, the total heating time, in proportion to this, came to 815 seconds, 713 seconds and 721 seconds. The maximum heating temperature of the exterior wall by the opening size reached 282.4℃ at 2,000mm, 382.9℃ at 1,600㎜, and 423.8℃ at 1,400㎜. This represented that as the opening size gets smaller, the heating temperature of the exterior wall by fire spread becomes higher.

개구부 상부 차양설치 및 길이에 따른 외벽 수열온도분포에 관한 연구

정의인 ( Jung Ui-in ),홍상훈 ( Hong Sang-hun ),김봉주 ( Kim Bong-joo ) 한국건축시공학회 2020 한국건축시공학회지 Vol.20 No.4

This study used a real-scale model experiment to reproduce internal fires in residential buildings such as a multi-dwelling unit, in order to prevent damage caused by tens of thousands of fires witnessed each year and to take measures to cope with them. For experimental conditions, different opening sizes were applied to measure and analyze the heating temperature of the exterior wall. Results drawn are as follow : On top of this, the experimental conditions had whether to install shading and put a shading length differently, before measuring and analyzing the heating temperature of the exterior wall. Subsequent results were drawn as shown below. Based on the maximum temperature, the temperature was lowered as much as around 90℃ at 150mm, around 150℃ or over at 300mm and over 175℃ at 450mm. It also turned out that the difference in maximum temperature dropped by around 180℃ or over. This indicated that the shading installation works well in lowering flame temperature generated by fire spread of the exterior wall.

굴 패각을 골재로 사용한 모르타르의 강도특성에 관한 연구

정의인 ( Ui In Jung ),유남규 ( Nam Gyu Yu ),허민회 ( Min Hoe Heo ),김봉주 ( Bong Joo Kim ),원철희 ( Chul Hee Won ),박정훈 ( Jung Hun Park ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.1

Oyster shell is produce by shucking process in oyster farming in southern coast of Korea. In average, about 6.7kg of oyster shell is produced as an industrial waste for 1kg of oyster flesh, and even only in last year, it is estimated that about 150,000 ton of oyster shell is produced. Oyster shell is light weighted and the strength characteristic of it is similar to send. So we produced mortar test piece using grounded oyster shell powder under 5mm of its particle size according to fine aggregate standard and reviewed strength Properties.