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2013WinShotcreteEMag

(a) (b) Fig. 6: Comparison of surface from surface scaling test: (a) before test; and (b) after 50 cycles sequencing of the field work. A mobile mixer was used for easy supply and better quality control of Kyong-Ku Yun is a the shotcrete mixture. Mockup test panels were Professor at Kangwon shot to qualify the shotcrete crew and to further National University Chun- assess in-place material characteristics of the cheon-si, Gangwon-do, shotcrete, just as is done in the ACI Shotcrete South Korea. He received Nozzleman certification program. his PhD from Michigan Overall, the rehabilitation work is the first State University, East shotcrete project outside of a tunnel to take place Lansing, MI, in 1995. in Korea using high-performance shotcrete. This His research interests include shotcrete project could not be done without using shotcrete and concrete materials. Recently, he because the spillway had multi-curved surfaces has been heavily involved in shotcrete and stiff slopes. The rehabilitated spillway will research and has consulted on the shot- have excellent durability because it was built with crete material and overall procedures for high-performance shotcrete. The project was this rehabilitation project. delivered to the client on time and met all the technical, architectural, and environmental Sung-Yong Choi is a requirements. Through the project, high-perfor- Shotcrete Manager for mance shotcrete provided its versatility and flex- Daesang E&C, a leading ibility as a method of placing concrete over the Korean company for shot- multi-curved surface of the spillway. crete research and appli- cation. He received his PhD from Kangwon 2012 honorable mention National University in 2009, with an emphasis on rheology and the Project Name air-void system of wet-mix shotcrete. He was Hydrodemolition and Shotcrete for a General Manager for this rehabilitation Rehabilitating a Reservoir Spillway project in the field of shotcrete mixtures, Project Location equipment, application, and quality control. Chuncheon, Republic of Korea Shotcrete Contractor Yong-Gon Kim is CEO Daesang E&C of Daesang E&C, a leading Korean company General Contractor for shotcrete research and Daesang E&C application. He received Architect/Engineer his PhD from Kangwon Daesang Engineering Co. National University in Material Supplier/Manufacturer 2010, with an emphasis Daesang E&C on latex-modified concrete and steel fiber- reinforced concrete. His research interests Project Owner include shotcrete application. Korea Rural Community Corporation 52 Shotcrete • Winter 2013


2013WinShotcreteEMag
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