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 (consolidated version)
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates); German version EN 771-3:2011+A1:2015— 45 стр.
Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and light-weight aggregates); German version EN 771-3:2003 + A1:2005— 36 стр.