In terms of importance of coastal structures in Kuwait, the study was started to investigate compressive strength. A review to previous studies was achieved. Environmental additives were proposed, 16 samples were prepared and immersed in 45.000 ppm salty water for 24 months. Tests and measurements were executed after 8 months intervals. Diagrams were plotted to relate the investigated parameters and statistical analysis was achieved. Plastic fiber sheets were found to achieve the best results. Recommendtins for practice, such as implementig plastic sheets, were suggested. Recommendations for research, innovating other additives, were suggested.