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방미진 ( Bang Mi-jin ),신기수 ( Shin Ki-su ),박기봉 ( Park Ki-bong ) 한국건축시공학회 2018 한국건축시공학회 학술발표대회 논문집 Vol.18 No.1
This study produced Portland limestone cement at the rate of limestone substitution by grinding limestone and clinker together, and it conducted an XRD analysis to determine the sign language response structure as a basic study on Portland Limestone Cement. As a result of the XRD analysis, the higher the substitution rate of limestone, the more likely it is that the detection rate of ettringite is decreased. Additionally, we could see that the production volume of Mono-carbonate was increasing.
석회석 미분말을 혼입한 시멘트 페이스트의 수화반응 및 역학적 특성 분석에 관한 연구
신기수 ( Shin Ki-su ),방미진 ( Bang Mi-jin ),박기봉 ( Park Ki-bong ) 한국건축시공학회 2017 한국건축시공학회 학술발표대회 논문집 Vol.17 No.1
The addition of a limestone filler(LF) to fill into the voids between cement and aggregate particles can reduce the cementitious paste volume. This paper aim to evaluate the influence of LF contents on the hydration kinetics and compressive strength. Hydration kinetics were evaluate using heat of hydration, ignition loss and thermal analysis. The heat of hydration was measured using Isothermal Calorimetry. The degree of hydration was measured using ignition loss. Hydration product analysis was carried out by Thermal Gravimetric and Differential Thermal Analysis. The results show that the addition of LF reduces not only the initial setting time and heat of hydration peak, also degree of hydration and rate of strength development at early age increase with the addition of LF. It can be concluded the LF fills the pore between cement particles due to formation of carboaluminate, which may accelerate the setting of cement pastes.
황형태,방미진 단국대학교 1998 論文集 Vol.33 No.-
The Problem of multiple comparison between several exponential populations is considered by means of simultaneous confidence intervals. To control the familywise error rate, the simultaneous confidence intervals for ratios of the exponential parameter are derived, and the critical values are calculated and tabulated for the practical use. It is shown that the critical values can be approximated for the large sample case. The results are applied to the comparison of the several normal variances.