DIN EN 772-9-2005 圬工单位的试验方法.第9部分:通过添加盐测定黏土和硅酸盖圬工单位孔隙体积和百分比及净体积
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
This document specifies a method of determining the volume and percentage of voids and the het volume of calcium silicate masonry units containing cells, frogs and holes.#,,#