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플라이애시를 혼입한 기포콘크리트의 압축강도 특성에 관한 실험적 연구
오세출(Oh Se-Chul),서치호(Seo Chee-Ho),지석원(Ji Suk-Won) 대한건축학회 2003 大韓建築學會論文集 : 構造系 Vol.19 No.4
This study aims at the production of foamed concrete mixed with fly-ash, examInIng the variation of the mechanical properties of foamed concrete, and issuing the data to site engineers for quality control. The experiment began by mixing the fly-ash by a maximum of 60% in stages and the mixing was mainly based on practical mixture. The following results were obtained from the experiment. In the instance of replacing cement with fly-ash. the outlook specific gravity and the water absorption ratio appeared not to be affected, while the compressive strength tended to decrease inversely proportional to the increasing fly-ash as compared to foamed concrete mixed with only cement. However, under long cure periods, an improvement in compressive strength was observed strength. As earlier stated, the pozzolanic reaction of the fly-ash contributed to the increased strength and also assisted in recovering the narrow range of the strength increased ratio obtained at early cure periods.
건설폐목을 이용한 목질계보드의 시멘트응결 특성에 관한 실험적 연구
김세환,오세출,Kim, Sae Hoan,Oh, Sae Chool 한국건설순환자원학회 2007 한국건설순환자원학회지 Vol.3 No.1
In this study we experimented setting time and basic properties as waste wood fiber and sodium silicate substitution rate to reuse waste wood fiber produced in construction field to wood chip board. To do this construction waste woods were crushed with the size less than 10mm, mixed with the rate of 1:2, 2.5, 3, and added sodium silicate with the rate of 0, 5% of cement content. The results are as follows. As the substitution rate of construction waste wood was increased delay of setting time was also increased, and the batch of adding 5% accelerator had a 13~17 hours faster setting time than non accelerator batch. The compressive strength was lower as wood substitution rate was higher, and as the specific gravity was higher, the strength was also higher. As wood substitution rate was higher, heat conductivity was lower, and as specific gravity was higher, heat conductivity also was higher.
페스티로폼을 혼입한 기포콘크리트의 압축강도 특성에 관한 실험적 연구
박혜정,오세출,서치호 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2
The purpose of this study is to prepare the basic data for the development of cement composite using ocher and find wide application to construction material. Cement composite was made up of 2% pulp as reinforcing fiber and ocher which was divided active and non-active. Cement composite which was mixing with ocher was manufactured by extrusion modeling method. Physical property and the character of compressive strength was analyzed and the result was as follows. In case of non-active ocher, the more increase mixing ratio, the mare decrease compressive strength. Compressive strength showed 500㎏f/㎠ in 9day air-dried curing and 5day steam curing. On the other hand, in case of active other, the more increase mixing ratio, the more increase compressive strength. Only in 40% mixing ratio in air-dried or steam curing, compressive strength showed 500㎏f/㎠ in early age. In case of autoclave curing, compressive strength showed relatively high regardless of a sort of ocher.
초등학교 시설의 개·보수 실태 및 노후화 현황에 관한 연구
권용균,오세출,최수경,최민권,서치호 대한건축학회 2001 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.21 No.2
The purposes of this study are to obtain basic data for method of remodeling , and to consider a program to understand the degree of deterioration in educational facilities. To get these data, actual repair condition and deterioration condition in Elementary School Facilities were studied. The results of the actual condition of repair in elementary school facilities were as follows. Firstly, pre-examinations based on life-cycle of facilities were not executed. Secondly, inadequate valuations on facilities accelerated the deteriorations of facilities. Finally, construction material and method were applied equally to all facilities ignoring performance criteria. These factors shortened life-cycle and caused economic loss. The results of current problems in maintenance were as follows. Firstly, valuation processes were subject and empirical. Secondly, institution of item and grade to value deterioration was ambiguous. Finally, The facilities were valued by limiting examinations and appraisals. In sum, the establishment of general idea for the evaluation of deterioration and the presentation of total decision method for the scheme of deterioration are required.