| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately and easily diagnose deterioration of FRP structure. <P>SOLUTION: When a crack C is formed in an FRP lining layer, an acid liquid infiltrates from the crack C into an anticorrosive layer 3b of the FRP lining layer to corrode reagent pipelines 4a, 4b. When the acid liquid corrodes the reagent pipelines 4a, 4b, the color of a bromothymol blue reagent discolors from green to yellow to red by a fact that the acid liquid reacts with the bromothymol blue reagent in the reagent pipelines 4a, 4b. Thus, the bromothymol blue reagent discolored to yellow to red is discharged to a drainage tank which is connected to the reagent pipelines 4a, 4b corresponding to a formation part of the crack C. Consequently, an operator can diagnose deterioration of the FRP lining layer by confirming the color of the bromothymol blue reagent to be discharged to the drainage tank. <P>COPYRIGHT: (C)2013,JPO&INPIT |
