Methods of test for masonry units - Part 9: Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling; German version EN 772-9:1998 + A1:2005— 8 стр.
Methods of test for masonry units - Part 18: Determination of freeze-thaw resistance of calcium silicate masonry units; German version EN 772-18:2000— 5 стр.