Ki Yong Ann
한양대학교 건설환경공학부 · 공학
Ki Yong Ann 교수의 연구실은 콘크리트의 내구성과 수명 연장에 초점을 맞춘 고도화된 시멘트 기반 재료 및 표면 처리 기술에 대한 연구를 수행하고 있습니다. 주요 연구 방향은 마그네슘 포스페이트-cement(MPC)의 물리화학적 거동, 염소 이on의 이동 거동 제어, 그리고 냉동-융해 및 외부 환경에 의한 손상 메커니즘 분석을 포함합니다. 특히, 복합 환경 하에서의 부식 기초 메커니즘과 표면 처리를 통한 이온 침투 억제 기술에 대한 심층적 연구가 진행되고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Fundamental properties of magnesium phosphate cement (MPC) were investigated in this paper. The setting time and compressive and bond (i.e., flexural and tensile bond) strengths were measured to assess the applicability, and hydration product was detected by the X-ray diffraction. The specimens were manufactured with magnesia and potassium dihydrogen phosphate (K 2 HPO 4 ) was added to activate hydration process. The Borax (Na 2 B 4 O 7 ·10H 2 O) was used as a retarder to mitigate overwhelming r
The present study concerns a development of calcium aluminate cement (CAC) concrete to enhance the durability against an externally chemically aggressive environment, in particular, chloride-induced corrosion. To evaluate the inhibition effect and concrete properties, CAC was partially mixed with ordinary Portland cement (OPC), ranging from 5% to 15%, as a binder. As a result, it was found that an increase in the CAC in binder resulted in a dramatic decrease in the setting time of fresh concrete
Laboratory tests were undertaken to assess the effect of calcium nitrite-based corrosion inhibitors in raising the chloride threshold level (CTL) for the corrosion of steel embedded in concrete and hence the time to corrosion initiation. Specimens with a centrally located steel rebar were cast with 0, 1·23, 2·5 and 5·0% nitrite by weight of cement and were cured for 4 weeks. Then they were immersed in 4M sodium chloride solution and the galvanic current between the embedded steel and an external
