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폐PET섬유를 혼입한 시멘트모르터의 역학적 특성에 관한 연구
김영근,김상철,김명훈,Kim, Young-geun,Kim, Sang-cheol,Kim, Myung-hoon 한국건축시공학회 2002 한국건축시공학회지 Vol.2 No.4
In this study we intended to investigate properties of cement mortar with recycled PET fiber, PE fiber. and PP fiber such as slump flow, compressive strength, tensile strength, and flexural strength. At results of experiment. several properties of specimen with recycled PET fiber were little low comparing those of specimen with PE fiber and PP fiber. But if we see from point of economy and recycle of industrial wastes, it has enough reason to be used. Compressive strength of specimen with recycled PET fiber at 55 days was about 10% higher. but tensile strength and flexural strength were lower than that of no-fiber.
김영근,김우성,위용곤,김남영,이호석,Kim, Young-Geun,Kim, Woo-Sung,Wye, Yong-Gon,Kim, Nam-Yung,Lee, Ho-Suk 한국터널지하공간학회 2003 터널기술 Vol.5 No.2
최근 도로설계시 두 개의 터널이 짧은 거리로 계속적으로 존재하는 연속터널에 대한 설계사례가 증가하고 있다. 이러한 경우에 있어, 한 터널내에서 발생한 오염물질은 다른 터널로 재유입하여 터널환기 시스템에 중대한 영향을 미치게 되므로, 이에 대한 적절한 환기검토가 수행되어야 한다. 본 연구에서는 동해 고속도로 설계시 나타난 연속터널을 대상으로 하여 1차원 터널내 오염농도 해석 및 3차원 CFD 해석 프로그램을 사용하여 터널내 오염농도의 거동 및 터널 갱구부 주변의 오염물질의 재유입 여부를 분석하여, 연속터널에 대한 터널내 외부유동에 대한 환기영향을 검증하였다. 이를 위하여 해당지역인 속초지방의 기상데이터를 분석하고, 기상조건에 따른 터널내부의 공기환경을 검토하였으며, 3차원 시뮬레이션을 통하여 각각의 터널에 대한 재유입 여부 및 재유입율을 분석하였다. Recently, there are many cases in the roadway design for successive tunnel with small distance between two tunnels. In this case, the degree of interference for successive tunnels is a significant consideration in the design of ventilation systems. Also, Re-inflows of contaminated air in successive tunnel make serious ventilation problems in case of fire accident in the tunnel. In this study, for successive tunnels in Donghae highway project, the concentration of contaminant such as CO, NOx and Smoke were calculated by numerical analysis using 1D and 3D-CFD analysis. And, the rate of re-inflow at the portals of successive tunnel according to the direction of wind were analysed.
아세트화 아크릴 공중합체 - 올레인산 혼합 에멀젼계 방수제 제조연구
김영근,황용현 ( Young Geun Kim,Yong Hyun Hwang ) 한국유화학회 1996 한국응용과학기술학회지 Vol.13 No.3
EMA-co-DAMA were synthesized form 2-diethylaminoethyl metacrylate and ethylhexyl metacrylate in acrylmonomer. To facilitate water emulsification, acrylic copolymer was cationized by acetic acid to produce acetated acrylic copolymer. The structures of the synthesized copolymer and acetated copolymers were confirmed by IR, NMR, and molecular weight was measure by GPC, and C.H.N elemental analysis. Acetated acrylic copolymers were perfectly emulsified in water and showed increased emulsion stability. Polymer dispersion for cement modifier[(PDCM-PEM) water proof agent of cement for concrete in building construction] was prepared by blending of the guaternized acrylic copolymer syndisized above, sodium silicate, sodium gluconate and oleic acid emulsion. The result with prepared polymer dispersion of cement modifier was examined, and it was found that excellent waterprooffing effect ; Water permeability ratio is 0.50 under the water pressure of 100g/cm^2 and 0.60 under 3kg/cm^2, and water absorption ratio is 0.42∼0.50 and 1.0∼1.02 compressive strength ratio at mixed of water/PDCM-PEM is 50 times.
내구성유연제에 관한 연구 (Ⅱ) - 알킬이미다졸린 유도체의 내구성유연제로서의 응용 -
김영근,박홍수,송갑준 ( Young Geun Kim,Hong Soo Park,Kab Jun Song ) 한국공업화학회 1990 공업화학 Vol.1 No.2
Softners-BHICS, BBICS, and BTICS were prepared from 1, 2-disubstituted imidazoline compounds, such as 1-behenoylaminoethyl-1-glycidyl-2-heneicosylimidazolinium chloride(BHIC), 1-behenoylbis(aminoethyl)-1-glycidyl-2-heneicosylimidazolinium chloride(BBIC), and 1-behenoyltris(aminoethyl)-1-glycidyl-2-heneicosylimidazolinium chloride(BTIC), and treated to acrylic fiber. The measurements of softness, lubricating and antistatic properties showed that they have not only good softness and lubricating property but also a little antistatic property. Furthermore, the initial bending resistance for BBICS and BTICS was 5 grade, and remained 3∼4 grade after 5 times washing. As results of these tests, they showed good softner effects having durability. The prepared softners were proved to be durable softner through a series of experimental results for washable properties of feeling by varying treating temperature and pH change.
김영근,Kim, Young-Geun 선박안전기술공단 2013 선박안전 Vol.35 No.-
2012년 2월 5일을 기점으로 하여 소방검정 시스템에 대하여 전반적인 변화가 있었다. "소방시설 설치 유지 및 안전관리에 관한 법률" 개정시행과 동시에 행정안전부령인 "소방용 기계 기구의 형식승인 등에 관한 규칙"이 "소방용품의 품질관리에 관한 규칙"으로 명칭이 변경되었다. 이에 따라 제품검사방법에 제조업체에서 유통 전에 생산시마다 검사하는 생산제품검사와 제조업체의 품질관리에 따라 검사하는 품질제품검사를 도입하는 등 소방검정시스템이 크게 바뀌었으며 이에 따른 주요 변경사항과 소방검정시스템에 대하여 소개하고자 한다.