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유리섬유 혼입 기포콘크리트의 배합변화에 따른 압축강도 특성에 관한 연구
허재원 ( Jae-won Her ),김효열 ( Hyo-youl Kim ),임남기 ( Nam-gi Lim ) 한국건축시공학회 2005 한국건축시공학회 학술발표대회 논문집 Vol.5 No.1
The purpose of this study was to analyze the compression strength research by aerated concrete as mixing ratio This Study used foaming-agent and produced aerated concrete by pre-foam way that is used in construction site. An experiment changes unit cement amount, w/c and the glass fiber miming rate and measured capacity change, unit capacity weight and compressive strength. The obtained from experimental study are as following; Research to reduce unit capacity weight in condition more than unit cement 500kgf is considered should be gone side by side. The highest compressive strength result appeared in aerated concrete that cement amount 600kgf and w/c ratio 45%, 50%. compressive strength was increased maximum 34% when glass fiber 0.7% addition cause by coherence enlargement to enlargement of cement paste and glass fiber addition per unit volume
허재원 ( Jae Won Her ),이종필 ( Jong Phil Lee ),김효열 ( Hyo Youl Kim ),임남기 ( Nam Gi Lim ) 한국건축시공학회 2004 한국건축시공학회 학술발표대회 논문집 Vol.4 No.1
In this study, we processed two procedures of application test of filler for special-purpose utility that are new application methods of aerated concrete and properties test of aerated concrete according to mixing ratio because we investigated the better use of aerated concrete as filler for fireproof safety and we proposed basic data about standardization of mixing of aerated concrete. We measured flow and volume change of aerated concrete. And if its volume doesn`t change, we added measuring unit weight and compressive strength. To test application of aerated concrete as filler for fireproof safety, we filled up aerated concrete to fireproof safety according to suitable mixing ratio. Then we measured maximum temperature of inner part of fireproof safety in accordance with the standard test of fireproof. According to the results, aerated concrete as filler for fireproof safety could be possibly used. So when we make aerated concrete, we should consider using an adding agent as well as a foaming agent.
다량의 산업부산물을 활용한 슬러리계 되메움 재료의 물성 및 현장적용 가능성 평가
료효개 ( Liao Xiaokai ),허재원 ( Her Jae-won ),김동훈 ( Kim Dong-hun ),임남기 ( Lim Nam-gi ) 한국건축시공학회 2020 한국건축시공학회 학술발표대회 논문집 Vol.20 No.2
This study has resulted in the following findings. First, Using more than 30% of GBFS to replace FA enabled bleeding control through improved fluidity. Moreover, it has been confirmed that effective strength and proper quality can be achieved when it was applied as a backfilling material with higher early strength than the base material. Second, When using more than 30% of FNS to replace sand, it was found that adding 0.3∼0.35 of the AE agent is effective for bleeding control through improved fluidity. Third, When using more than 30% of both GBFS and FNS in combination, it was found that adding 0.3∼0.35 of the AE agent is effective for bleeding control through improved fluidity. Also, it was confirmed that proper mixing of 15∼60% of GF secured the effective strength and desired quality as a refiller and joint filler material.
박철우 ( Park Cheul Woo ),허재원 ( Her Jae-won ),신상엽 ( Shin Sang-yeop ),정의창 ( Jeong Euy-chang ),임남기 ( Lim Nam Gi ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.2
Experimental results show that the maximum temperature of the floorboard surface is 1/2 level compared to the hot water temperature of 80℃, which is circulated by hot water heating. And the part above 10mm above the surface of the floorboard was low as 1/3 level. Therefore, in order to improve the heating efficiency of the room where the flooring is applied to the hot water heating, the thermal conductivity of the flooring material should be improved as well.
액상규산칼륨으로 표면처리한 고성능 콘크리트 구조용 굵은 순환골재 개발
박용진(Park Yong-Jin),허재원(Her Jae-Won),임남기(Lim Nam-Gi) 대한건축학회 2010 大韓建築學會論文集 : 構造系 Vol.26 No.7
Economical development has triggered the enforcement of a large scale of national land development, road construction & housing construction projects causing a rapid increase in aggregate amount used. And now national land environment is being destroyed by the rubble & rubble sand collection as the river sand, river gravels and even sea sand are being exhausted. Like this, the amount of aggregates demanded is increasing every day causing extreme shortage of supply of them, and so the use of recycled aggregates from grinded construction waste, that is, waste concrete seems to be indispensable to balance the demand and supply of the aggregates. Therefore, a use amount of recycled aggregates would be enlarged gradually, but due to the lack of understanding of recycled aggregates and lack of multiple studies on recycled aggregates-used concrete, most of them are used for non structural use such as for embankment or as the molding, subgrade materials for road construction. So, a production plan for recycled aggregates needs to be made first under the consideration of their weak properties that is their weakness in intensity, and high water absorbtion rate affected by cement pate on the aggregate surface need to be complemented in the way of elevating their quality. Accordingly, this researcher will prepare in this study a base on which recycled aggregates would be useful by processing the breaks and cracks on their surface with potassium silicate for the purpose of lifting their quality which are inferior to that of natural aggregates.