The fresh-fresh water situations occur in building constructed on hinterlands and main lands. The fresh-salt water situations are mainly in structures or building close to lagoon or sea. The salt-fresh water situations are very rare in practice but are well pronounced in areas where there is scarcity of fresh water or the available surface water is salty. The salt-salt water situations are visible mostly in structures built in ocean or sea. In addition, higher concrete cover can be provided when designing the member with increased environmental awareness and its potential hazardous effects, utilization of industrial by products has become an attractive alternative to disposal. Silica fume(SF), which is by product of the smelting process in the silicon and ferrosilicon industry. Silica fume is very effective in the design and development of high performance concrete. This paper presents the results of an experimental investigations carried out to find the suitability of silica fume in High Performance concrete. The incorporation of silica fume into the normal concrete is a routine one in the present days to produce the tailor made high strength and high-performance concrete. The design parameters are increasing with the incorporation of silica fume in conventional concrete and the mix proportioning is becoming complex.
