Blaine Air Permeability Test Apparatus

About Blaine Air Permeability Test Apparatus

Blaine Air Permeability Test Apparatus 

The fineness of cement has a significant effect in its physical properties when used in concrete. Generally the finer the cement powder, the more rapid the concrete will set, as there is an increase in its surface area. The measure of fineness is usually undertaken by sieving, and the result assessed against the cement standard for compliance. The Blaine air permeability apparatus is used to determine the fineness of Portland cement in terms of the specific surface expressed as total surface area in square centimetres per gram of cement. The Blaine apparatus draws a defined volume of air through a prepared bed of cement of defined porosity.