Determination of specific surface from a volume mass count

3 Determination of. specific surface from a volume (mass) count 

Consider a particle size distribution determination by mass where the fractional masses (volume =f) of particles of mean diameters (d ) are determined. For a sieve analysis, for example, the measured diameters are 

Example Determination of specific surface from sieve analysis data Table 2.7 Calculation of mass specific surface from sieve analysis data 

Sieve size (pm) Mean sieve size (dj Mass fraction residing on sieve i lr) Surface area factor (cm2 cm-3) 

From the data in Table 2.7, the volume specific surface by sieving is 509 cm cm. For a powder of density 2500 kg m-3 this becomes 

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