AIR PERMEABILITY APPARATUS. IS : 4031 , 5516 , 1727 , & 4828, ASTM C - 204, BS : 4359 Part II.
The apparatus is used for determining the fineness of cement in terms of specific surface expressed as total surface area in square centimeters per gram of cement. This is a variable flow type air perimeter. Specifications : The apparatus consists one each of permeability cell 12.5mm I.D. Manometer 'U' type mounted on stand with a buitl in a stop cock, Perforated disc plunger Rubber stopper, Rubber tube 30cm long. Packet of 12 filter paper discs and a bottle of 100 cc dibutyiphthalate liquid.
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