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CBS-dust 치환에 따른 고로슬래그 다량치환 시멘트 벽돌 품질에 미치는 영향
한준희 ( Han¸ Jun-hui ),한수환 ( Han¸ Soo-hwan ),김수호 ( Kim¸ Su-hoo ),윤치환 ( Yoon¸ Chi-whan ),한민철 ( Han¸ Min-cheol ),한천구 ( Han¸ Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 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.
저발열 결합재 및 CGS를 잔골재로 치환한 매스콘크리트의 수화열 해석
한준희 ( Han Jun-hui ),임군수 ( Lim Gun-su ),최일경 ( Chi Il-kyeung ),윤치환 ( Yoon Chee-whan ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.1
This study evaluated temperature distribution through adiabatic temperature rising test and hydration heat Analysis as a performance verification to utilize CGS as a hydration heat reduction material for mass concrete when replacing it with fine aggregate. According to the analysis, the temperature difference between the center and the surface was the highest at about 30℃, followed by the CGS 50% at 26℃ and the low heat combiner FA 30% at 23℃.
超遲延劑의 凝結時間差에 의해 區分打設된 매스 콘크리트의 水和熱 低減 效果에 관한 硏究
한천구(Han Cheon-Goo),오선교(Oh Seon-Kyo),윤치환(Yoon Chi-Han),황인성(Hwang Yin-Seong) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.7
This study is dealt with reduction of hydration heat of 4 layer division-placed mass concrete by the difference of setting time of super retarding agent. According to the results, peak temperature of plain concrete, which does not mix super retarding agent, show 63℃ in the middle of 3rd layer. In the division-placed mock up structure which is controled so that the difference of setting time is 0.5, 1.0, 1.5, 2.0day same interval and 1.5 day same interval with change of thickness, setting time is retarded a bit in order of 4 layer to 1 layer, but peak temperature shows 70℃ that is higher than plain concrete. But in mock up structure which is division-placed at the varied interval, peak temperature by hydration heat shows 50℃ that it is reduced by about 13℃, compared with plain concrete because after first peak hydration heat of 4th layer (plain concrete), hydration reaction progresses after the drop of hydration heat in order of 3rd, 2nd and 1st layer. Thus, it is effective for reduction of hydration heat that concrete is division-placed at the varied interval of setting time.
개량형 Durometer를 활용한 미장시기별 Dry Mortar의 건조수축 길이변화 특성
한수환 ( Han¸ Soo-hwan ),현승용 ( Hyun¸ Seung-yong ),황인성 ( Hwang¸ Yin-seung ),윤치환 ( Yoon¸ Chi-whan ),한민철 ( Han¸ Min-cheol ),한천구 ( Han¸ Cheon-goo ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2
This study is conducted to provide a method to estimate the setting time and early age compressive strength using D type durometer.Test results indicated that the use of D type Durometer attached with modified needle, which was designed to secure improved accuracy in setting and compressive strength, enables to estimate setting time and the compressive strength at early age.
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.
응결시간차를 활용한 매스콘크리트 수화열 조정공법의 현장적용
심보길 ( Sim Bo-kil ),윤치환 ( Yoon Chi-whan ),손성운 ( Son Sung-un ),한민철 ( Han Min-cheol ),오선교 ( Oh Seon-kyo ),한천구 ( Han Cheon-goo ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.2
This paper presents field application test results of mass concrete using super retarding agent. The field test was carried out at mat foundation (thickness lm) of newly constructed information center of Chongju university and apartment house constructed with Daewon corporation. Difference of setting time of concrete between with super retarding agent and without super retarding agent is considered. Concrete without super retarding agent is placed at upper layer and with super retarding agent at lower layer. According to test results, the reducing method of hydration heat considering difference of setting time with super retarding agent can reduce the highest temperature about 3~4℃, and delay the peak time about 3~4days. Compressive strength using super retarding agent is somewhat higher than that of normal concrete. Accordingly, super retarding agent does not affect the strength development.