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고품질 골재 전환을 위한 석탄 가스화 용융슬래그의 전처리 공정 개발
후윈야오 ( Hu¸ Yun-yao ),한수환 ( Han¸ Soo-hwan ),임군수 ( Lim¸ Gun-su ),한준희 ( Han¸ Jun-hui ),김종 ( Kim¸ Jong ),한민철 ( Han¸ Min-cheol ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
This study examines the performance of pretreatment process system as the initial construction stage of the pretreatment process system to use CGS, a by-product generated in IGCC, as a concrete fine aggregate of construction materials. The process undergoes a grinding process capable of grinding to a predetermined particle size during primary grinding and a sorting plant through sieve grading of 2.5 mm or less for particle size correction. Afterwards, it is hoped that the use of coal gasification slag of Korean IGCC as a fine aggregate for concrete will be distributed and expanded by producing quality-improved CGS fine aggregate using water as a medium for removing impurities and particulates.
한국과 중국간의 고로슬래그 미분말 및 플라이 애시의 품질 규정 비교
후윈야오 ( Hu Yun-yao ),임군수 ( Lim Gun-su ),김종 ( Kim Jong ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.2
In this study, the quality of mineral admixture, Comparison of blast-furnace slag(BS) and fly ash(FA)in Korea and China. In the case of BS, Korea is mainly classified into 1 type to 4 types according to the specific surface area, whereas China is classified into S105, 95, and 75 according to the activity index of 28 days of age. In the case of FA, Korea is like BS, is mainly classified into types 1 to 4 according to specific surface area, whereas China is classified into F, C (class F, class C) by ingredients and class I, II, and III according to powder and ignition loss.
후윈야오 ( Hu Yun-yao ),한수환 ( Han Soo-hwan ),임군수 ( Lim Gun-su ),한준희 ( Han Jun-hui ),윤치환 ( Yoon Chi-whan ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
In this study, the classification, particle size, physical properties, and harmful substance contents of aggregates were compared in the standards between Korea and China. As a result of the analysis, although Korea and China are geographically adjacent from a global perspective, there are many differences in standards. In other words, it is analyzed that the standard was set due to the influence of the United States and Japan in Korea, while the standard was set due to the influence of Europe and Russia in China.
한국과 중국의 한중 콘크리트 표준시방서의 보온양생 규정 비교
후윈야오 ( Hu Yun-yao ),정준택 ( Jeong Jun-taek ),임군수 ( Lim Gun-su ),한준희 ( Han Jun-hui ),김종 ( Kim Jong ),한민철 ( Han Min-cheol ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
In this paper, standard specification of heat curing section of cold weather concrete between Korea and China were compared. First, Korea concrete specification (KCS 14 20 40) stipulates that the application period is less than 4℃ per day or less than 0℃ per day right after pouring, but in China, the outdoor daily average temperature is less than 5℃ for five consecutive days. This is believed to be due to the difference in temperatures between Korea and China in winter. Next, in the case of Korea, KCS do not show that the concrete temperature in curing should be 5℃ or higher to prevent early frost damage and obtain the minimum required compressive strength. On the other hand, in the case of China, the specificaion does not show that the curing method is selected based on the concrete surface coefficient after considering the outdoor temperature. In addition, in Korea and China regulation, the temperature of the space during thermal curing was shown to be similar.
후윈야오 ( Hu Yun-yao ),임군수 ( Lim Gun-su ),김종 ( Kim Jong ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.1
In this study, comparison of the quality standard of chemical admixtures between Korea and China is conducted. It is classified into three types of water reducing agents: standard, delayed, and accelerated according to the sensitivity and strength improvement of the sensitivity and strength of the agent. However, Chinese standards classify reducing agents only as standard, high efficiency, and high performance, and do not add AE agents into water reducing agent. On the other hand, that of Korea has a classification regulation for reducing agents added with AE agents.
염소집진장치 부산물을 사용한 고로슬래그 다량 치환 시멘트 벽돌의 특성
후윈야오(Hu, Yun Yao),한수환(Han, Soo Hwan),윤치환(Yoon, Chi Whan),한민철(Han, Min Cheol),한천구(Han, Cheon Goo) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
This study examines the performance of CBS-Dust for the utilization of cement bricks as alkali stimulants for furnace slag replacement binders. It converts the CBS-Dust substitution rate and the excess slag substitution rate. According to the analysis, when replacing CBS-Dust with 65~70 % of BS substitution rate and 7.5~10 % of CBS-Dust, it shows excellent performance as an alkali stimulant of BS’ potential hydrophobic reaction, and it is expected to be effective for secondary products of BS replaced in large quantities.
수력선별 공정이 석탄 가스화 용융 슬래그 잔골재 품질에 미치는 영향
후윈야오 ( Hu¸ Yun-yao ),김수호 ( Kim¸ Su-Hoo ),한준희 ( Han Jun-hui ),김종 ( Kim¸ Jung ),한민철 ( Han¸ Min-cheol ),한천구 ( Han¸ Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
This study examines the performance of the pre-treatment process system to use CGS, a by-product generated in IGCC, as a concrete fine aggregate for construction materials, on the quality of CGS fine aggregate. As a result of the analysis, it is judged that the quality of fine aggregates of CGS can be improved at both density, absorption rate, and 0.08mm body passage amount after the hydroelectric screening process using water as a medium during the pretreatment process. It is believed that it can be used as basic data for national standard certification of CGS fine aggregates in the future.
리트벨트법을 이용한 당류계 초지연성 혼화제 혼입 시멘트 페이스트의 수화생성물 정량 분석
현승용 ( Hyun¸ Seung-yong ),후윈야오 ( Hu¸ Yun-yao ),김수호 ( Kim¸ Su-hoo ),김종 ( Kim¸ Jong ),한민철 ( Han¸ Min-cheol ),한천구 ( Han¸ Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
This study attempted to study the setting time and compressive strength according to the sugar type through XRD. Setting time was found to be delayed the most when mixing white sugar, and setting time was promoted when mixing Saccharin and Aspartame. It was found that when white sugar and Grosvener siraitia were mixed, the compressive strength was higher than that of Control. Aspartame the age passed, C<sub>3</sub>S decreased and Ca(OH)<sub>2</sub> increased.
이현직 ( Lee Hyeon-jik ),후윈야오 ( Hu Yun-yao ),이승민 ( Lee Seung-min ),한준희 ( Han Jun-hui ),김종 ( Kin Jong ),한민철 ( Han Min-cheol ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
This study compared the curing temperature of the bubble sheet and the photothermal insulation sheet incorporating carbon-based photothermal materials to reduce concrete curing time as a part of shortening construction period. As a result of the experiment, bubble sheet with photothermal material B is judged to be effective in shortening the curing time under hot environment.