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곽기주,이경동,곽동림 한국농공학회 1997 韓國農工學會誌 : 전원과 자원 Vol.39 No.1
An experimental study of the application of Silica fume for the high strength concrete was conducted. Nine specimens with three different contents of silica fume, 0%, 10%, 20% and with three water-cement ratio 30%, 40%, 50% were tested. Results shows that 10% of silica fume and 30% of water-cement ratio has a maximum strength with 700kg/$cm^2$ of compressive strength and 64kg/$cm^2$ of splitting tensile strength and 100kg/$cm^2$ of flexural strength. Slump value of the tested samples decreases with increasing water-cement ratio and elapsed time of silica fume. Splitting tensile strength$({\sigma}_f)$ and flexural strength $({\sigma}_f)$ and static modulus of elasticity(E) can be correlated with compressive strength $({\sigma}_c)$ from a regression analysis.
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곽기주,이경동,곽동림 순천대학교 기초과학연구소 1996 基礎科學硏究誌 Vol.7 No.-
An experimental study of the application of silica fume for the high strength concrete was conducted. Nine specimens with the variation of the contents of silica fume Owt%, 10wt%, 20wt% and that of water-cement ratio 30%, 40%, 50% were tested. Results show that 10% of silica fume and 30% of water-cement ratio has a maximum strength with 700kg/㎠ of compressive strength and 64kg/㎠ of splitting tensile strength and 100kg/㎠ of flexural strength. Slump value of the tested samples decreases with increasing water-cement ratio and elapsed time of silica fume. Splitting tensile strength(σ_t) and flexural strength(σ_f) and static modulus of elasticity (E) can be correlated with compressive strength(σ_c) from a regression analysis.
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곽기주 ( Kwak Kee Ju ),이경동 ( Lee Kyeong Dong ),곽동림 ( Kwak Dong Lim ) 한국농공학회 1997 韓國農工學會誌 : 전원과 자원 Vol.39 No.1
An experimental study of the application of Silica fume for the high strength concrete was conducted. Nine specimens with three different contents of silica fume, 0%, 10%, 20% and with three water-cement ratio 30%, 40%, 50% were tested. Results shows that 10% of silica fume and 30% of water-cement ratio has a maximum strength with 700kg/cm<sup>2</sup> of compressive strength and 64kg/cm<sup>2</sup> of splitting tensile strength and 100kg/cm<sup>2</sup> of flexural strength. Slump value of the tested samples decreases with increasing water-cement ratio and elapsed time of silica fume. Splitting tensile strength(□□)and flexural strength(□□)and static modulus of elasticity(E) can be correlated with compressive strength(□□)from a regression analysis.
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곽기주 ( Kwack Kee Ju ),손순종 ( Son Soon Jong ),서병철 ( Sea Byung Chal ),곽동림 ( Kwack Tong Lim ) 한국농공학회 1995 韓國農工學會誌 : 전원과 자원 Vol.37 No.5
To examine the appicability of the converter slag to aggregate, tests were performed for the converter slag specimens which were aged with steam, and the stability of expansion was investigated. The strength of the converter slag was found to be lower than that of the natural aggregate. But the strength of the concrete mixed with the converter slag and the granular slag was increased with an increase of the content of the granular slag. The slump value was larger for the specimen of the converter slag than that for the natural aggregate. The specific weight of the converter slag was decreased with an increase of the aging peroid. The aging time for the converter slag was accessed to be about 48 hours to accommodate the full stability of the expansion. The amount of the steam needed to age one ton of converter slag to full expansion was accessed to be 60 kg. From the regression analysis for splitting tensile strength (t), and flexural strength (f), the compressive strength (c) based on the following formulas were proposed σ<sub>t</sub>=0.1506·σ<sub>c</sub>+4.5(kg/cm<sup>2</sup>) (σ<sub>f</sub>=0.1537·σ<sub>c</sub>+30.5(kg/cm<sup>2</sup>).
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