http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
CFBC 보일러 석탄회의 경화에 대한 고로슬래그, 탈황석고의 영향
이웅걸(Woong-Geol Lee),김진호(Jin-Ho Kim),김경남(Kyung-Nam Kim),송명신(Myong-Shin Song) 한국건설순환자원학회 2021 한국건설순환자원학회 논문집 Vol.9 No.4
순환유동층보일러 석탄회(CFBA)는 탈황공정을 위한 석회석 투입에 의한 탈황석고와 free-CaO에 의해 자기경화되는 특성이 있는 것으로 알려져 있다. 본 연구에서는 시멘트 바인더 대체용 CFBA의 자가경화에 대한 고로슬래그(BFS)와 탈황석고(FDG)의 영향을 검토하였다. 다량의 Fe2O3, free-CaO 및 탈황 석고를 함유하는 CFBA의 수화반응에 의한 압축강도는 칼슘알루미네이트 수화물, 칼슘실리케이트 수화물, 에트링자이트 및 칼슘카보페라이트 수화물(3CaOㆍFe₂O₃ㆍ3CaCO₃ㆍ12H₂O)의 형성에 기인한다. CFBA의 자가 경화에 의한 압축강도는 Ordinary Portland Cement에서 C₄AF의 수화물과 유사한 수화물을 생성하여 표현하며, C₄AF의 수화시 CaSO₄가 존재하면 CaSO₄가 CaOㆍAl₂O₃와 에트링자이트를 형성하고, 유리 CaO와 CaCO₃가 함께 존재하면 육방정계 결정인 탄산칼슘 또는 탄산칼슘 결정이 형성됩니다. CFBA의 경화 특성은 C₄AF의 수화 및 경화 메커니즘에 의해 유사한 특성을 가짐을 확인하였다. The effects of blast furnace slag(BFS) and desulfurized gypsum(FDG) on the compressive strength of CFBA, and self-hydration of CFBA were studied. CFBA has self-hydrating and hardening properties, and it can be seen that the compressive strength of CFBA can be improved by using appropriate amounts of BFS and FDG. In addition, the self-hardening properties of CFBA are similar to the hydration reaction of 4CaOㆍAl₂O₃ㆍFe₂O₃ (C₄AF), a cement clinker mineral, and when free-CaO, CaSO₄ and CaCO₃ coexist, Compressive strength of CFBA is expressed by the formation of calcium carbo compounds and hydrates of ettringite, calcium silicate, and calcium aluminate.
이웅걸 ( Woong-geol Lee ),한래봉 ( Lae-bong Han ),조성현 ( Sung-hyun Cho ),이평수 ( Pyeong-su Lee ),송명신 ( Myong-shin Song ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.1
Treating hydrogen sulfide in landfills generates a large amount of bio-sulfur. Bio-sulfur is mainly used in agriculture because of its small particle size and excellent hydrophilicity. However, the actual amount used is very small and it is piled up in a landfill. Therefore, as a basic study for expanding the utilization of bio-sulfur, this study examines the effect of dried bio-sulfur on the physical properties and hydration reaction of ordinary Portland cement. The hydrate of cement with bio-sulfur at the start of aging was the same as that of plain cement, and sulfur was additionally confirmed. At curing age of 28 days, magnesium sulfate hydrate and kuzelite were also confirmed. As the amount of bio-sulfur added increased, the setting time decreased while the hydration heat tended to decrease. When cured in water, the compressive strength of the mortar with bio-sulfur was reduced compared to that of plain cement. For dry curing, the compressive strength was increased at the initial curing age and remained the same as plain cement at 28 days.
유동층상 보일러 석탄회의 자기-경화 및 탄산화 반응 메커니즘
이웅걸(Lee, Woong Geol),강승민(Kang, Seung Min),송현진(Song, Hyun Jin),송명신(Song, Myong Shin) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구는 유동층상 보일러 석탄회의 자기 경화메커니즘과 탄산화 반응에 대하여 연구하였다. 유동층상 보일러 석탄회는 에트링자이트의 생성과, 이산화탄소 존재 하에서의 탄산화 반응에 의해 생성되는 calcium carbo ferrite의 생성에 의해 경화하는 특성을 나타낸다. In this study, the machanism of self-hardening and carbonation reaction of fluidized-bed boiler coal ash. Fluidized-bed boiler coal ash hardened by formation of ettringite and by formation of calcium carbo ferrite by carbo reaction in the presence of CO2.
강현주,이웅걸,송명신,강승민,김경남,Kang, Hyun Ju,Lee, Woong Geol,Song, Myong Shin,Kang, Seung Min,Kim, Kyeng Nam 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.5
This study investigated on the early hydration and physical characteristics of BFS by pH variation. NaOH solution was used as a pH activator. In the range from pH 12 to pH 14, Experiment was compared the hydration propertied of OPC(Ordinary Portland Cement) and BFS(Blast Furnace BFS) and BFS containing 2 wt% of gypsum. It was found that CAH(Calcium Aluminate Hydrates) phases and CSH(Calcium Silicate Hydrates) phases were formed during the early hydration of BFS, and that CAH phases, CSH phases and ettringites were formed during the early hydration of BFS containing 2 wt% of gypsum. Furthermore, early hydration of BFS and BFS containing 2 wt% of gypsum were faster then OPC at pH 14, and the 1 day compressive strength of BFS increased by approximately 30% compared to OPC, and BFS containing 2 wt% of gypsum also increased by approximately 40% compared to OPC.