To determine the fineness of cements, pozzolanas and other powdery materials, various international specifications recommend the use of “specific area” method. In the instrument described below, air permeability method is used to determine the specific surface as total surface area in cm2/g of material. Air Permeability Apparatus (Blaine Type) is with ISI Certification Mark, IS:5516
Ref. Standards : IS: 1727, 4031, 4825
