LIST OF ILLUSTRATIONS 



Page 



Figure 1. Concrete panel for antifouling tests ' 5 



Figure 2. Concrete cubes for compressive strength tests 5 



Figure 3. Laminated concrete panels for shear test 6 



Figure 4. Concrete panels mounted for ocean tests 7 



Figure 5. Control panel after 8 months in harbor 14 



Figure 6. Control panel after 3 years in harbor 14 



Figure 7. Temporary growth on panel before antifouling chemicals 



had oozed to the surface, in ocean 6 months 15 



Figure 8. Same panel free of fouling 3-1/2 years later 15 



Figure 9. Panel impregnated with TBTO mixture at a level of 250 



ml per liter, after 3 years in ocean 16 



Figure 10. Panel impregnated with 100% creosote, after 3 years 



in ocean 16 



Figure 11. Smooth side of panel impregnated with 10% TBTO mixture, 



after 3 years in ocean 17 



Figure 12. Rough side of panel impregnated with 10% TBTO mixture, 



after 3 years in ocean 17 



Figure 13. Antifouling panel with smooth top and bottom, after 



2 years in ocean 18 



Figure 14. Panel impregnated with copper naphthenate mixture, 



after 3 years in ocean 18 



LIST OF TABLES 



Table 1 . Numbering System and the Chemical Solutions Used to 



Treat Expanded Shale Aggregates for These Tests 4 



Table 2. Results of Compression Tests on 2 -Inch Cubes of 



Experimental Antifouling Concrete 9 



Table 3. Shearing Forces Required to Remove 3 -Inch-Square Panels 

 of Antifouling Concrete From Concrete Surface to Which 

 They are Bonded 11 



Table 4. Compressive Strengths and Antifouling Properties of 



Concrete Impregnated With Various Chemical Mixtures ... 1 9 



