Performance of Encased Silica-Manganese Slag Stone Columns in Soft Marine Clay

Stone columns are the most suitable and economical ground improvement technique for soft soils. Stone columns accelerate the consolidation process, thereby increase the stiffness of the soil. This increase may not be sufficient because of the less lateral confinement, which leads to excessive bulging. The strength of the composite soil can also be increased further by encasing the column with geotextile. In this paper, model tests were conducted on end-bearing stone columns with geotextile encasement and compared with the unreinforced (plain) stone columns. The stone columns were prepared by placing the silica-manganese slag, sand and were reinforced with geotextile with different encasement lengths of D, 2D, 3D, and 4D (D is the stone column diameter; i.e., 5 cm). The tests demonstrated that the engineering behavior of the soil was improved by introducing the silica-manganese slag (when compared with conventional stone columns) and also with encasement. Bulging can also be reduced by providing encasement beyond the zone of bulging

REFRIGERANT RECOVERY UNIT

In this project we are fabricating the Refrigerant Recovery unit. It is a simple unit which is used for recovery the refrigerants in refrigeration system and air conditioning systems. It is used to recover the refrigerants and other refrigerants also. The refrigerant or gas which is stored in recovery unit is reusable. The refrigerants are very hazardous and harmful. Due to concerns about environmental pollution caused by the release of refrigerants into the environment, and ozone layer depletion due to choro-for a carbons present in the refrigerant gas so, we use recovery unit to recover that gases when any Leakages or repairs occur in refrigeration system and Air conditioning system. We know that refrigerants are very cost .so, we use recovery unit to store the refrigerants in recovery cylinder and we reuse it. It is very is useful in central AC plants (Air handing units and fan coil units) in industries. In future international Refrigeration society banned the present refrigerants in that time recovery unit is so useful to recover that refrigerants or gases .It is very useful to protect our Atmosphere and Environment