An Experimental Study on the Application of Porous Scoria Concrete to Artificial Reefs for Soft Coral

J. Ocean Eng. Technol. 2005;19(4):28-34.

HONG CHONG-HYUN;KIM MOON-HOON;KIM SEOK-CHEL;PARK SUNG-BAE;Ryu SEONG-PIL;

Department of Civil and Environmental Engineering, Tamna University, Seogwipo, Korea;Department of Civil and Environmental Engineering, Tamna University, Seogwipo, Korea;IDEA-AISA;IDEA-AISA;Department of Environmental Engineering, College of Ocean Science

연산호 육성용 어초 개발을 위한 송이 다공성 콘크리트의 적용성에 관한 실험적 연구

홍종현;김문훈;김석철;박성배;류성필;

탐라대학교 토목환경공학과;탐라대학교 토목환경공학과;제주대학교 해양과학대학 환경공학과;

Keywords: leju Scoria, Artificial Reef, Mix Design Model, Porous Concrete, Soft Coral

핵심용어: 제주송이, 인공어초, 배합설계모델, 다공성콘크리트, 연산호

Abstract

In the study application of volcanic scoria concrete to artificial reefs is investigated. Volcanic scoria is a natural volcanic product that shows light weight, mil/i-porous, and far-infrared irradiation characteristics. The properties of volcanic scoria concrete using Jeju scoria aggregate are evaluated by conducting a comprehensive series of tests on strength and void ratio. It is concluded that the volcanic scoria concrete has the sufficient strength of 4MPa-13MPa and adequate void ratio of $12%-35%$ to be accepted as artificial reef concrete. The field experiments are performed through observation by scuba diver's at the Seogwipo coast. Porous specimen and plane concrete specimen are prepared for comparison purposes. Seasonal changes of soft coral on the two series of test specimens were have been observed from Apr. 9, 2004 to Mar. 18, 2005. The soft coral is well grown on the porous specimen however there are no significant changes on the conventional plain concrete specimen. Thus it is concluded that the volcanic scoria concrete is highly suitable as artificial reef concrete.