The premature deterioration of reinforced concrete structures in the harsh environmental conditions of the Marine Environment especially in Persian Gulf region causes reduction of service life in these structures. To restoring or increasing of service life and efficient operation in deteriorated of RC structures, it is necessary repair and\or rehabilitation activates accomplished.
Fiber reinforced concrete (FRC) is concrete containing fibrous material which increases its structural integrity. It contains short discrete fibers that are uniformly distributed and randomly oriented. Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers. Within these different fibers that character of fiber reinforced concrete changes with varying concretes, fiber materials, geometries, distribution, orientation and densities.
Self-Consolidating Concrete (SCC) is known as a highly flowable yet stable concrete. It can flow easily under its own weight and fill restricted formworks with no need for vibration. Application of SCC can result in lots of advantages, both economic and technical, for the engineers and contractors.
Concrete Durability is such a problem that need exact attention, if not, it cause so much excessive cost to country economic. Hence, knowing concrete durability harmful factors is essential. One of the common harmful factors is Chloride diffusion and reinforcement corrosion. The Persian Gulf area in south of Iran in order of special geographical conditions such as temperature, moisture content, wind and the soluble chloride in the sea, atmosphere and soil is one of the areas most prone to concrete Chloride diffusion and reinforcement corrosion.
Flowable fill, or controlled Low Strength Concrete, is gaining greater acceptance and use as a backfill material, particularly for work around pipes and culverts. Flowable fill easily enters difficult access areas, provides a relatively uniform compaction density, is self-leveling, and requires minimal crew and equipment for application. With these attributes, plus the ability to control its strength in cases requiring either re-excavation (lower strengths) or heavy surface loads (higher strengths), flowable fill is the solution being recommended by concrete producers for private and public service projects.