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sklademVydáno: 1999-07-15
BS 7943:1999
Guide to the interpretation of petrographical examinations for alkali-silica reactivity
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Označení normy: | BS 7943:1999 |
Počet stran: | 20 |
Vydáno: | 1999-07-15 |
ISBN: | 0 580 28273 2 |
Status: | Standard |
DESCRIPTION
BS 7943:1999
This standard BS 7943:1999 Guide to the interpretation of petrographical examinations for alkali-silica reactivity is classified in these ICS categories:
- 91.100.15 Mineral materials and products
This British Standard gives guidance on the interpretation of the results of petrographical examination of coarse and fine aggregates, carried out in accordance with BS 812-104, in terms of the susceptibility of the combined aggregate to alkali-silica reactivity (ASR) sufficient to cause damage to concrete in which it is used. The guidance is not applicable to alkali-carbonate reactive materials.
NOTE 1 Guidance on precision expected from the petrographical examination of coarse and fine aggregates, carried out in accordance with BS 812-104, is given in annex A.
NOTE 2 It is recommended that a petrographical examination be earned out by a petrographer who is a member of the Proficiency Scheme for Aggregate Petrographers.
Applies to coarse and fine aggregates as specified in BS 812-104.