Concrete and concrete products (ICS 91.100.30)
Ministerial Decree No. 221 /2021 (2 pages, in Arabic) mandating the Egyptian Standard ES 8473-1 " Silica fume for concrete part:1 Definitions, requirements and conformity criteria" (33 page(s), in English)
The Ministerial Decree No. 221 /2021 gives the producers and importers a six-month transitional period to abide by the Egyptian standard ES 8473-1 which applies to the silica fume which is a by-product of the smelting process used to produce silicon metal and ferro-silicon alloys. This part of gives requirements for chemical and physical properties for silica fume to be used as a type II addition in concrete conforming to EN 206-1, or in mortars, grouts and other mixes.
This part also states conformity criteria and related rules. This standard does not give rules for the use of silica fume in concrete. Some rules are given in EN 206-1. NOTE 1 Supplementary rules related to the use of silica fume in concrete may be given in non conflicting national standards for concrete. NOTE 2 EN 206-1 (188.8.131.52 in the 2000 edition) provides conditions for national acceptance of silica fumes coming from calcium silicon alloys production or other silica fumes, not conforming completely to EN 13263, as type II additions for use in concrete. Worth mentioning is that this standard adopts the technical content of EN 13263-1:2005+A1:2009