Fineness modulus is an empirical factor obtained by adding the cumulative percentages of aggregate retained on each of the standard sieves ranging from 80 mm to 150 micron and dividing this sum by 100.
Fineness modulus bụ ihe na-emetụ n'ahụ nke enwetara site na ịgbakwunye na ịkekọrịta pasent ngụkọta nke ngụkọta nke fọdụrụ na sieve ọkọlọtọ ọ bụla dị na 80 mm ruo 150 microns wee kee 100