1 Scope
This standard identified the grand granulated blast-furnace slag from various perspectives: definition, requirements, experimental approaches, inspection regulations, packaging, transporting and storage.
This standard applies to the production and inspection of ground granulated blast-furnace in cement admixture and concrete mixed material.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
GB175-1999 Portland cement, ordinary Portland cement
GB/T 176-1996 The chemical analysis approach of cement (eqvISO680：1990)
GB/T 203-1994 Ground granulated blast-furnace slag used in Cement
GB/T 208-1994 Cement density
GB/T 2419-1994 Test method for fluidity of cement mortar
GB/T 5483-1996 Gypsum and Anhydrite (neqIS01587：1975)
GB/T 8074-1987 Testing method for specific surface of cement (Blaine method)
GB 9774-1996 Sacks for packing cement
GB l2573-1990 Sampling method of cement
GB/T 17671-1999 Determination method for cement mortar strength (ISO Standard) (idtISO679: 1989)
JC/T 420-1991 Chemical analysis approach of chlorine in cement raw material
JC/T 667-1997 Additives to the cement grinding process
3. Definition
The following definition is adopted by this standard:
3.1 The Ground Granulated Blast-furnace Slag (GGBS): is obtained from granulated blast-furnace slag which normally complies with GB/T203, to produce a granular product that is then dried and ground (or grinding with few amount of gypsum) into a fine powder that meets the relevant requirement of activity index. Typically during the granulating procedure, grinding aid is permitted to add, but no more than 1% of total GGBS quantity.
Notes:
1. Gypsum: is at or above the benchmark of gypsum and anhydrite, which is standardised by Category G or Category A 2nd Class (included) in GB/T5438.
2. Grinding aid: should comply with the requirements of JC/T667, but the reference cement will be mixed up by 50% Portland cement and 50% GGBS under JC/T667.
4. Technical Requirement
