http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Calcium-Aluminate 화합물과 무기 binder를 이용한 발열성 시멘트의 전도성
최우석(Choi, Woo Suk),서병돌(Seo, Byong Dol),송현진(Song, Hyun Jin),이웅걸(Lee, Woong Geol),송명신(Song, Myong Shin) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
본 연구는 C12A7계 전도성 결합재 합성 및 인공 골재를 이용하여 동절기 노면 융빙이 가능한 전도성 재료에 대하여 연구하였다. In this study, a conductive materials as a materials for ice melting on a frozen road surface in winter season was studied using 12CaO·7Al2O3 based conductive binder and artificial aggregate.
내구성 향상을 위하여 단열성능이 부여된 단면복구 MORTAR의 물성
강현주,나승현,송명신,정의담,서병돌,Kang, Hyun-Ju,Na, Seung-Hyun,Song, Myong-Shin,Jeong, Eui-Dam,Seo, Byung-Dol 한국세라믹학회 2010 한국세라믹학회지 Vol.47 No.5
In this study, we studied on the durability of restorative cement mortar for deteriorated concrete at complex deteriorated conditions as variation of temperature and of humidities. We made a comparison between restorative materials with insulation function and restorative materials without insulation function in items of compressive and bending strength and permeability of water, durability for carbonation, salt damage, diffusion coefficient of salt at complex deterioration conditions like change of temperature, change of humidity, For insulation, we used close-pore type Alumino-Silicate lightweight aggregate and substituted 12 wt% and 15 wt% out of original restorative cement mortar without insulation function. As a result, it was found that original restorative cement mortar without insulation function fail to meet Korean Standard on polymer modified cement mortar for maintenance in concrete structure, but restorative cement mortar with insulation function is in contentment Korean Standard to meet excellent than restorative materials without insulation function for durability at complex deteriorated conditions.
산업부산물에 의해 다중소성된 C<sub>12</sub>A<sub>7</sub>의 수화특성
송현진 ( Hyeon-jin Song ),서병돌 ( Byong-dol Seo ),최우석 ( Woo-suk Choi ),김동필 ( Dong-pil Kim ),송명신 ( Myong-shin Song ) 한국폐기물자원순환학회 2023 한국폐기물자원순환학회지 Vol.40 No.1
Low-temperature calcined cement is a required solution in the cement industry for reducing energy requirements and CO<sub>2</sub> emissions. 12CaO·7Al<sub>2</sub>O<sub>3</sub> (hereinafter C<sub>12</sub>A<sub>7</sub>) is a calcium aluminate-based mineral that has properties of rapid hardening, expansion, and ultra-high strength. C<sub>12</sub>A<sub>7</sub> is mainly produced by the high-temperature melting method, but applying the low-temperature synthesis method (the hydrate sintering method) of C<sub>3</sub>A can enable its low-temperature production without any melting process. In this study, C<sub>12</sub>A<sub>7</sub> was synthesized using waste limestone and waste alumina that was decarboxylated at 900℃ for one hour and then calcined at 1,200℃ for one hour (this process was repeated twice) to study the hydration properties of the synthesized C<sub>12</sub>A<sub>7</sub>. The synthesis yield of the synthesized C<sub>12</sub>A<sub>7</sub> was ≥70% and the setting time for the synthesized C<sub>12</sub>A<sub>7</sub> hydrates finished within one minute but the setting time of the synthesized C<sub>12</sub>A<sub>7</sub> substituted for 50% gypsum was 158 minutes. The compressive strength of the synthesized C<sub>12</sub>A<sub>7</sub> substituted for 20% gypsum was 8.2 MPa.