CONTENTS 



Page 



INTRODUCTION 1 



MATERIALS 2 



Lightweight Expanded Shale Aggregate 2 



Portland Cement 2 



Antifouling Chemicals 2 



METHODS 2 



Impregnation of Expanded Shale Aggregates 2 



Mixing the Antifouling Concrete 3 



Casting the Concrete Test Specimens 3 



EXPOSURE SITES 6 



Point Mugu Pier 6 



Port Hueneme Harbor 6 



Shallow-Water Test Site 7 



SEACON Test Site 7 



Guantanamo Bay, Cuba 7 



EXPERIMENTAL RESULTS 8 



Retention of Chemical Solution in Aggregates 8 



Compressive Strength Tests 8 



Shear Strength Tests 10 



Antifouling Tests 10 



Six-Hundred-Foot Depth 10 



One-Hundred-Twenty-Foot Depth 11 



Near-Surface Exposure at Guantanamo Bay 12 



Near-Surface Exposure at Point Mugu 12 



Near-Surface Exposure at Port Hueneme 12 



Summary of Antifouling Tests 13 



CONCLUSIONS 20 



REFERENCES 21 



