http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
하동 화력발전소에 저장된 Bottom ash의 광물학적 물성
문훈 ( Hoon Moon ),김성근 ( Seong Geun Kim ),윤주한 ( Ju Han Yoon ),정철우 ( Chul Woo Chung ),이수용 ( Soo Yong Lee ) 한국건축시공학회 2015 한국건축시공학회 학술발표대회 논문집 Vol.15 No.2
Significant amount of bottom ash has been stored in the pond site of Hadong coal power plant located at southeast region of Korea. In order to address strong environmental regulation that is going to be enforced in the near future, it is necessary to consume waste bottom ash stored in the pond site in a sustainable manner. In this research, the chemical and mineral characteristics of various sized bottom ash samples from Hadong coal power plant were analyzed using XRF, XRD, and particle size analyzer. According to the experimental results, the chemical compositions of bottom ash was slightly changed in terms of Al and Fe content. As the size of the bottom ash increased, cristobalite was observed as a result of crystallization. The mineralogical composition and its size distribution of powder type bottom ash indicated that significant amount of fly ash is included together with small sized bottom ash.
패각류를 혼입한 모르터의 기초물성 평가 및 계면 결합상태
문훈 ( Hoon Moon ),김지현 ( Ji Hyun Kim ),이재용 ( Jae Yong Lee ),정철우 ( Chul Woo Chung ) 한국건축시공학회 2014 한국건축시공학회 학술발표대회 논문집 Vol.14 No.1
Recently, many environmental problems occur due to the waste shells in South Korea. In case of oyster and cockle, utilizing waste shells to produce fertilizer once also, but due to sluggish consumption, production is no longer difficult. The stored amount of waste shells in the fertilizer manufacturing company is overfilled, and thus cannot accept any more of the waste shells. As a result, landfill and dumping of waste shells have become an increasingly environmental problems. In this research, the basic physical properties and interfacial bonding form of the mortar mixed with waste shells (manila clam, cockle, clam, sea mussel, oyster) were evaluated.
자철석 분말 및 동슬래그를 잔골재로 활용한 중량 콘크리트의 유동성 평가
문훈 ( Moon Hoon ),김지현 ( Kim Ji-hyun ),정철우 ( Chung Chul-woo ),이재용 ( Lee Jae-yong ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1
The Research is underway to utilize heavyweight concrete for various applications. One of them is to use heavy concrete as a marine concrete such as a breakwater to resist wave. Marine concrete is often complex in shape and requires high fluidity. When the heavyweight concrete is high fluidity, there is a high risk of segregation due to the high density of the coarse aggregate. Therefore, we evaluate the fluidity of heavyweight concrete using heavy fine aggregate. As a result of the fluidity evaluation of the heavyweight concrete, the fluidity of the heavy fine aggregate was similar to that of ordinary concrete. Therefore, it is considered that the use of heavy fine aggregate in the development of high fluidity heavyweight concrete will be one of the methods.
천연골재 콘크리트와 순환골재 콘크리트 접합면의 전단강도
문훈(Hoon Moon),최익제(Ik-Je Choi),김지현(Ji-Hyun Kim),정철우(Chul-Woo Chung),김영찬(Young-Chan Kim) 한국건설순환자원학회 2020 한국건설순환자원학회 논문집 Vol.8 No.1
건설자원의 고갈과 콘크리트 폐기물의 증가에 따라 콘크리트 재활용은 선택적 사항이라기보다는 필수적 사항으로 되어 가고 있다. 콘크리트 재활용에 대한 연구는 오래 동안 다양한 관점에서 수행되어 왔다. 그러나 여러 나라의 기준이나 권고사항을 보면 순환골재 콘크리트의 적용에는 순환골재의 비율이나 순환잔골재의 사용금지 등과 같은 많은 제한사항이 있다. 본 연구에서는 구조부재에서 천연골재 콘크리트와 순환골재 콘크리트를 분리타설하는 방법에 대한 적절성을 알아보고자 하였다. 순환골재콘크리트의 제작 시 굵은골재의 치환비율은 50, 100%로 하였고 두 콘크리트의 접합면에는 교섭을 도입하였다. 순환골재 콘크리트를 제작하는 과정에서 순환골재를 처리하거나 혼화재를 첨가하지 않았다. 두 콘크리트 접합면의 전단강도를 평가하기 위해 등분포하중으로 재하한 2면전단 시험법을 채택하였다. 실험결과에 따르면 골재치환율이 큰 시험체가 전단강도 대 압축강도 비가 크게 나왔는데 이는 굵은골재의 크기와 전단절단면의 조도에 기인한 것으로 보인다. 여러 가지 변수들의 영향을 알아보기 위한 후속연구가 필요하며 그와 같은 연구 활동을 진행 중이다. Concrete recycling is becoming mandatory rather selective due to depletion of constructional materials and increase of concrete waste. Studies on recycling concrete are conducted in various point of view for long time. However, standard or guideline of many countries for the application of recycled aggregate concrete(RAC) has restrictions such as low replacement rate of coarse aggregate and no fine aggregate allowed due to inferior material properties of recycled aggregate. This study intends to figure out the feasibility of casting natural aggregate concrete(NAC) and RAC separately in a structural member. In making RAC, replacement rate of coarse aggregate was 50, 100% in RAC and treatment of interface of two concretes is introduced. RAC treatment of recycled aggregate or inclusion of additives was not done as it can increase embodied energy of concrete work. Double-shear test with uniformly distributed loading was adopted to evaluate shear strength at the interface of two concretes. After curing it was hard to distinguish interface of two concretes. Experimental result revealed that specimen with higher replacement rate showed higher shear-to-compressive strength ratio, which is possibly attributed to coarse aggregate size and roughness of sheared section. Further study on the effect of various parameters is required and subsequent research activity is on-going.