
Blain Air Permeability Apparatus IS : 4031, IS :
5516, ASTM C204, BS:4359 part-2
Determines fineness of Portland cement in terms of specific surface expressed as total surface area in square centimeters per gram of cement. Consists of: calibrated U-tube manometer, ground glass joint, Brass test cell and plunger, rubber aspirator bulb and perforated disc. wood block for holding test cell during filling. Mounted on finished wood
panel with rubber-footed base. The apparatus comprises one each of Permeability Cell, U tube manometer with stop cock, perforated metal disc, plunger, Rubber stopper, Rubber tube with rubber bulb.
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