Methods of test for masonry units . part 3 : determination of net volume and percentage of voids of clay masonry units by hydrostatic weighing 圬工设施试验方法.第3部分:静流称重法测定粘土圬工设施中的空隙百分率和净容积
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Methods of test for masonry units - part 9 : determination of volume and percentage of voids and net volume of calcium silicate masonry units by sand filling 圬工单位试验方法.第9部分:用沙充填法测定硅酸钙圬工单位的体积空隙百分率和净容积