q illustrate concept of filter designthe material


Q. Illustrate Concept of filter design?

The material used for filter should satisfy the following normal criteria

a. Filter material is more pervious than the base material / core material

b. Filter material has such gradation that the particles of base / core material do not migrate through. Such migration can clog the voids and fail the very purpose of a filter.

c. Filter material helps to form natural graded material in the zone of base material / core material.

d. Normally, natural material to satisfy the above requirements is not readily available in nature. A graded filter design consists of layers of different grades.

e. To minimise segregation, each grade of the filter material is normally very uniform in size.

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Civil Engineering: q illustrate concept of filter designthe material
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