An Experimental Study on the Material Properties of the EG/AD Model Ice Used for Ice Model Basins

doi:2011.25.1.49

J. Ocean Eng. Technol. > Volume 25(1); 2011 > Article

J. Ocean Eng. Technol. 2011;25(1):49-55.
DOI: https://doi.org/10.5574/KSOE.2011.25.1.049

Kim Jung-Hyun,Choi Kyung-Sik

Department of Ocean Engineering Korea Maritime University,Department of Ocean Engineering Korea Maritime University

빙해수조용 EG/AD 모형빙의 재료특성 실험

김정현,최경식

한국해양대학교 해양공학과,한국해양대학교 해양공학과

Keywords: Ice model basin, Cold room, Ethylene glycol/Aliphatic detergent(EG/AD) Model ice, Mechanical properties, Flexural strength, Elastic modulus

핵심용어: 빙해수조, 저온실험실, EG/AD모형빙, 재료특성, 굽힘강도, 탄성계수

Abstract

The EG/AD/S model ice, originally developed by Timco (1986), was selected as the primary model ice material for the newly built MOERI Ice Model Basin in Korea. However, the existence of a sugar component in the EG/AD/S mixture may cause a serious maintenance problem, as described in certain references. This study focuses on the tests of the mechanical properties of the EG/AD/S and the EG/AD model ice. In order to understand the influence of sugar in the original EG/AD/S model ice and to find a possible substitute for sugar, a series of tests with the EG/AD model ice were performed, and the results were compared to those of the EG/AD/S model ice. The relatively large size of the MOERI Ice Model Basin made it difficult to control the initial strength of model ice, so it took a much longer time to achieve the target strength. In order to obtain a lower strength and stiffness for the model ice, the amount of chemical additives may be varied to achieve the desired strength level. This paper is a preliminary study aimed at seeking a possible substitute for the original EG/AD/S model ice for utilization in a large-scale ice tank. To understand the influence of sugar in the original EG/AD/S model ice, the mechanical properties of the EG/AD/S and EG/AD model ice, such as flexural strength, compressive strength, and elastic modulus, were tested in the laboratory condition and compared to each other. The warm-up procedure seems to be an important factor to reduce ice strength in the tests, so it is discussed in detail.