FRP船廃船解体技術に関する研究

概要

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Old boats made of FRP (glass fiber reinforced plastics) that were constructed in the early days of the FRP-application and completed their expected life span of more than 20 years, have begun to be retired from service. However, the breaking system of the waste FRP boats has not been established yet, because of the difficulties in breaking them of large scale and made by hard-processible material. The main purpose of this study is to know the possibilities of applying conventional techniques to the cutting method of FRP boats from the view-points of efficiency, economical merits, safety and influence on environment. In the study, both oxygen cutting and explosive cutting methods were investigated as techniques for breaking up FRP boats. The oxygen cutting which included gas cutting, powder cutting and oxygen lancing were examined. The results showed oxygen lancing with water spraying was the best way which had sufficient ability to cut FRP with less influence on environment. The explosive cutting method was found to have good ability to cut FRP, but it caused a very big explosive noize in the air. The explosive cutting under water decreased noise, but it yielded explosive vibration, which was necessary to be decreased in practical application.
1988-07-30