This European Standard specifies two methods of determining the particle size distribution of mixed or non-hardened wet mixed mortals. The method of wet sieving is applicable to mortars containing normal weight aggregates and the method of dry sieving to mortars containing lightweight aggregates.
EN 1015-1:1998 history
1998EN 1015-1:1998 Methods of test for mortar for masonry - Part 1: Determination of particle size distribution (by sieve analysis)