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강인규,류정수,권영호,이승현,박신영,Kang, In-Gyu,Ryu, Jeong-Su,Kwon, Young-Ho,Lee, Seung-Hyun,Park, Shin-Young (사)한국토질및기초기술사회 2006 기술발표회 Vol.2006 No.-
Soil nailing systems are generally many used in underground excavations and reinforcements of slopes since the first construction as a temporary retaining wall in 1993, Korea. In recently, they are many attempts to expand the permanent reinforcements of slopes However, experimental studies related to soil nailing systems are insufficient Specially, there are no researches related in the large scaled load tests of soil nailed walls in Korea In this study, a case study on the large scaled load tests of soil nailed walls is introduced and the behavior characteristic of them is investigated Also, they are proposed allowable deformation corresponding to the serviceability limit of soil nail walls and ultimate deformation corresponding to the collapse state of the walls. These results can be applied to the maintenance management of soil nailed walls And analysis on the required minimum factor of safety of soil nailed walls using the relation curve of load ratio and deformation ratio are carried out
시멘트 산업 탄소중립을 위한 KS 제·개정 로드맵 제안
강인규(In Gyu Kang),신상철(Sang Chul Shin),김건우(Geon Woo Kim),김진만(Jin Man Kim) 한국세라믹학회 2023 세라미스트 Vol.26 No.4
2050 Carbon Neutrality is a common goal globally that can no longer be postponed. In particularly, in the case of the cement industry, because the most important method which decreases significant amount of carbon emission, its importance has been emphasized increasingly. In order to achieve carbon neutrality in the cement industry, not only the realistic technology development and the system establishment has to be arranged, but also overall social change in the construction industry including the cement concrete industry must be accompanied. Furthermore, in order to establish an environment that can support the carbon-neutral strategy of the cement industry, discussions on the establishment and amendment of cement-related standards should be continuously conducted from the present point between cement stakeholders. In this point of view, this study is going to propose the draft roadmap by reviewing items for establishment and revision of domestic cement-related KS standards by reviewing and analyzing the trend of standards, technologies, and carbon neutrality roadmaps in major foreign countries. Current KS standards for cement have too environmental and institutional limitations to realize the goal in terms of 2050 carbon neutrality. Therefore, it is necessary to refer to the cement standards of major overseas countries, which are already advanced comparing to Korea. At the same time, efforts to establish and revise cement standards should be strengthened through active social discussion about the proposed roadmap.
석회석 미분말을 사용한 시멘트 모르타르의 기초특성에 관한 연구
강인규 ( Kang In-gyu ),라정민 ( La Jung-min ),김진만 ( Kim Jin-man ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.1
Portland Limestone Cement (PLC) is a blended cement using limestone powder as SCMs (Supplementary Cementitious Materials), and is currently regarded as an essential means for achieving carbon neutral in the cement industry. This study was performed to investigate the fresh and hardened properties of cement mortar according to the fineness and replacement ratio of limestone powder. As a result, the compressive strength of mortar used high blaine limestone powder were equivalent level of that of OPC.
강인규(Kang, In Gyu),신상철(Shin, Sang Chul),김진만(Kim, Jin Man) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구는 각국의 혼합시멘트 관련 표준을 비교·검토하여, 현시점에서 논의가 필요한 국내 혼합시멘트 관련 KS 개정 방향에 대해 정리한 것이다. 유럽 및 북미 등 해외 선진국에서는 시멘트 대체 재료(SCMs, Supplementary Cementitious Materials)를 사용한 다양한 혼합시멘트 규정이 제정되어 있으며, 이를 바탕으로 국내실정에 맞는 혼합시멘트 표준의 제·개정이 필요한 상황이라 판단된다. This study was carried out to compare and review the standards related to blended cement in each country, and summarized the direction of revision of KS for blended cement in Korea. As a result of the study, various blended cement standards using supplementary cementitious materials (SCMs) have been established in advanced countries such as Europe and North America. Therefore, domestic standard for blended cement should be established and revised with reference to foreign standard specifications.
김홍택,방윤경,강인규,조원희,Kim, Hong Taek,Bang, Yoon Kyung,Kang, In Gyu,Cho, Won Hee 대한토목학회 1991 대한토목학회논문집 Vol.11 No.4
본 연구에서는 항만공사에 이용되는 캔틸레버식 널말뚝 및 앵커로 지지된 널말뚝의 내진설계를 위한 해석방법의 제시가 이루어졌다. 제시된 해석방법은 침투에 의한 수압 및 유효수평응력의 변화를 고려하였으며, 또한 Mononobe-Okabe 토압이론 및 Westergaard, Matsuo-Ohara의 동수압 계산식이 적용되었다. 아울러 앵커로 지지된 널말뚝의 경우에 대해 안전율의 크기 선택에 관한 비교가 이루어졌으며, 또한 조밀한 모래지반의 경우에 대해, 준설저면의 경사각, 널말뚝 양쪽면의 수위차, 앵커의 위치, 벽마찰각 등이 근입깊이, 앵커하중 및 최대모멘트에 미치는 영향이 분석되었다. 이외에도 조밀한 모래지반에 설치되는 앵커로 지지된 널말뚝의 예비설계를 위한 표의 제시가 이루어졌으며, 본 연구 해석방법의 적용범위는 자유지지법의 경우로 한정된다. In the present study, an analytical solution method is proposed for the seismic design of cantilever sheet pile walls and anchored sheet pile walls used in harbor construction. Seepage pressures, together with a change in magnitudes of effective horizontal soil pressures, are included in the proposed solution method. Also, the Mononobe-Okabe analysis as well as the Westergaard and Matsuo-Ohara theory of hydrodynamic pressures is used in the proposed method. Further, the choice of values for safety factors is examined for the seismic design of anchored sheet pile walls, and the effects of various parameters(dredge line slope, differential in water levels, anchor position, and wall friction angle) on embedment depth, anchor force, and maximum bending moment are analyzed for anchored walls in dense sand deposits. In addition. the tables that could be used for preliminary seismic design of anchored walls in dense sands are presented. The proposed method deals with the sheet pile walls with free earth support.
박리 마쇄 기술을 적용한 폐콘크리트 미분말의 품질 향상 효과
김건우(Geon Woo Kim),신상철(Sang Chul Shin),강인규(In Gyu Kang),김진만(Jin Man Kim) 한국세라믹학회 2023 세라미스트 Vol.26 No.4
Since the main components of waste concrete fine powder generated in the process of converting waste concrete into recycled aggregate are essentially the same as the main ingredients of cement-clinker, it is possible to use it as a raw material for cement. In addition, because waste concrete fine powder is a decarbonated salt, using it as a raw material for cement clinker is a very important carbon-neutral technology that can be expected to reduce process-derived carbon emission generated during cement manufacturing. However, waste concrete fine powder has a low calcium oxide content of around 10%, so its usability as a clinker raw material is very low. In order to use waste concrete fine powder as a raw material for clinker, the calcium oxide content must be increased to more than 35%. Separating the hardened cement paste from the aggregate while reducing the crushing ration of the aggregate during the crushing process is an important means of increasing the calcium oxide content of waste concrete fine powder. Accordingly, this study conducted an experimental study to increase the calcium oxide content of waste concrete fine powder using exfoliation grinding technology. The characteristics of waste concrete fine powder recovered through the exfoliation grinding technology were examined for waste concrete collected from a domestic intermediate processing company, model concrete manufactured in a laboratory, and commercially available cement bricks. As a result of the experiment, it was possible to recover the waste concrete fine powder with a higher CaO content by applying exfoliation grinding technology, compared to the dust collection fine powder that could be recovered through the crushing and grinding process.