Classification is made by 40 categories in terms of the granulometric characteristics (eight classes) and the density. It covers the product before any pressure is exerted. The designation consists of the category, the number of granulometric class and the index of density.
Заменён стандартами:
ISO 1997(1992.12)
Дата введения:
01.03.72
Дата отмены:
01.12.92
Нормативные ссылки:
NF B57-010-1972, EQV*UNI ISO 1997-1987, EQV*UNE 56-920-90(1990/AENOR), NEQ