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17 October 2018 Development of a New Concrete Armor Unit for High Waves
Young Hyun Park*, Young-Min Oh, Sung Mo Ahn, Taek Hee Han, Young-Taek Kim, Kyung-Duck Suh, Deokhee Won
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Abstract

Park, Y.H.; Oh, Y.-M.; Ahn, S.M.; Han, T.H.; Kim, Y.-T.; Suh, K.-D., and Won, D., 2019. Development of a new concrete armor unit for high waves. Journal of Coastal Research, 35(3), 719–728. Coconut Creek (Florida), ISSN 0749-0208.

Hundreds of new concrete armor units (CAUs) have been developed since 1950, but only a few have been used because of their low price and familiarity. Because the design wave height has been increasing as a result of climate change, the Korean government decided to develop a new CAU for protection against high waves. Therefore, a new research project to develop a new CAU that considers stability, structural strength, economic feasibility, casting efficiency, and constructability was started. The new CAU was called Chi Block. The hydraulic stability achieved a Hudson stability coefficient of more than 13 at a significant wave height of 10 m by adopting a conservative approach. Chi Block can be installed in both uniform and random placements and can be used as an overlay for repair. A new placement for Chi Block was invented, and it features the advantage of functioning like a 1.5 layer. Although a single layer generally has a higher overtopping rate than a double layer, Chi Block, on uniform placement, has a performance near that of the Tetrapod.

©Coastal Education and Research Foundation, Inc. 2019
Young Hyun Park*, Young-Min Oh, Sung Mo Ahn, Taek Hee Han, Young-Taek Kim, Kyung-Duck Suh, and Deokhee Won "Development of a New Concrete Armor Unit for High Waves," Journal of Coastal Research 35(3), 719-728, (17 October 2018). https://doi.org/10.2112/JCOASTRES-D-17-00224.1
Received: 27 December 2017; Accepted: 19 August 2018; Published: 17 October 2018
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KEYWORDS
Breakwater
CAU
laboratory experiment
single layer
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