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재생골재 콘크리트의 현장적용을 위한 실험적 연구 - 전기충격식으로 수중파쇄된 재생골재를 중심으로 -
박희곤,정근호,임남기,이영도,정상진,정재영,Park, Hee-Gon,Jung, Keun-Ho,Lim, Nam-Ki,Lee, Young-Do,Jung, Sang-Jin,Jung, Jae-Young 한국건축시공학회 2003 한국건축시공학회지 Vol.3 No.1
The production accounts of domestic by-product is increased after 1990's. It is worried about the life reduction of dump land, as dump land's capacity have reached to limitation and the amount of construction industrial wastes is going higher. Recently, recycling aggregates could be gained from the reconstruction works using recycle process, and the study research of recycle concretes developed concrete application methods. It could put some outcome of studies to practical use for concrete products. The methods of crushing waste concrete are going diverse. In this study. the fundamental experiments and recycling application is investigated and analyzed with use of recycling aggregate which made of mechanical crush and underwater electrical impact crush, and the difference between underwater electrical impact crush, mechanical crush and natural aggregates is studied.
박희곤(Park Hee-Gon),김우재(Kim Woo-Jae),배연기(Bae Yeon-Ki),이한승(Lee Han-Seung),정상진(Jung Sang-Jin),이재삼(Lee Jae-Sam) 대한건축학회 2008 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.28 No.1(구조계)
As high rise buildings with 100 or more stories are being constructed, it is inevitable to use high performance materials including high performance concrete. What is most important in high performance concrete is extremely high strength in order to reduce the section of members in high rise buildings. During the last several years, there have been active researches on Ultra high strength concrete. While these researches have been mostly focused on strength development, however, other accompanying physical properties have not been studied sufficiently. Thus, the present study purposed to obtain and analyze data on the physical mechanical properties of Ultra high strength concrete through experiments and to use the results as basic information on required performance of concrete used in high rise buildings.
박희곤(Hee-Gon Park),김성현(Sung-Hyun Kim),류지원(Jee-Won Ryu) 대한정형외과학회 2017 대한정형외과학회지 Vol.52 No.3
사구종은 피하 지방층의 사구체에서 발생하는 혈관종의 일종으로 수부의 원위부, 조갑하에 특징적으로 호발하며 슬관절 주위에서는 드물게 발생하는 것으로 알려져 있다. 통증, 압통, 추위 민감성이 삼주징으로 알려져 있으나 실제로 증상이 명확하지 않은 경우가 많고 수지 이외의 부위에서 발생하는 경우에는 사구종 진단이 늦어질 수 있다. 수년간 지속적으로 슬관절 통증이 있었던 사구종 증례 2예를 경험하였으며 각각 초음파와 자기공명영상 검사를 통해 진단하였다. 슬관절 주위의 지속되는 통증을 호소하는 환자에서 사구종의 삼주징인 극심한 통증, 추위 민감성, 압통의 증상 유무를 주의 깊게 관찰하여 사구종도 감별해야 함을 이 증례를 통하여 알 수 있었고 빠른 진단과 수술적 치료가 중요할 것으로 생각되어 이에 대해 보고하는 바이다. Glomus tumor is a kind of hemangioma that occurs at the glomerulus in the subcutaneous layer. It mainly occurs at the distal hand and subungual area, and rarely at the knee joint. Pain, tenderness, and cold intolerance are known symptoms; however, symptoms in practice are not so easily detectable, and the diagnosis can be delayed if it is presented at areas other than the hand. If the diagnosis is delayed, patients could suffer extreme pain. Therefore, early diagnosis and surgical treatment are important. Ultrasound and magnetic resonance imaging were used to diagnose glomus tumor in our cases, which were found in subcutaneous tissue and muscle fascia. We claim that, for patients with persistent pain, known symptoms—extreme pain, cold intolerance, and tenderness—should be examined carefully and rule out glomus tumor. We report 2 cases of glomus tumors around the knee joint, which is not a common location of occurrence.
다발성 환자에서 뇌 손상이 동반된 장골 골절 시가골 형성 촉진예측을 위한 혈액검사에 대한 고찰
박희곤 ( Hee Gon Park ),김연준 ( Yeon Jun Kim ) 대한외상학회 2013 大韓外傷學會誌 Vol.26 No.3
Purpose: Among patients with multiple traumatic fractures, a tendency to form more callus exists in groups with multiple fractures combined with traumatic brain injury. This retrospective study evaluated the hematologic factors that might be useful to predict callus formation by comparing serologic tests and clinical and radiologic results in two groups. Methods: From January 2000 to December 2010, patients with femur shaft fractures were divided in two groups: one without traumatic brain injury (control group: 32 cases), and the other with traumatic brain injury (study group: 44 cases). We evaluated routine serologic exams and the amount of callus formation during the follow-up period. Results: Only the alkaline phosphatase level was statistically different between the two groups, not the White blood cell count, C-reactive protein, total calcium, and lactate dehydrogenase level. The amount of callus formation on the antero-posterior radiograph at the last follow up period was 74.9% in the study group and 42.1% in the control group. Then lateral radiograph showed 73.2% callus formation rate in the study group and 31.8% in the control group. Conclusion: In routine serologic exams, the two groups had no significant differences, except for the alkaline phosphatase level. The group with traumatic brain injury had much more callus formation, but there was no reliable factor to predict callus formation on the routine serologic exam.