How to find the fineness of ggbs?

To find the fineness of Ground Granulated Blast-furnace Slag (GGBS), you can use the Blaine fineness test, which measures the specific surface area of the material. This involves passing a known volume of air through a sample of GGBS and measuring the time taken for the air to pass through. The results are then used to calculate the fineness in terms of square meters per kilogram (m²/kg). Additionally, sieve analysis can be performed to determine particle size distribution, although Blaine fineness is more commonly used for GGBS.