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Storage of constituents at the central mixing hub

Aggregates must be stored on a firm and clean substrate for at least 24 hours before mixture production. Contamination with other constituents must be avoided.
Lime, cement, GGBS, HRB and dry fly ash must be stored sealed in, for example, a silo or suitable bags.
Conditioned (wet) fly ash must have no agglomerations greater than 10 mm size, measured by sieving samples through a 10 mm sieve with no more than 10 seconds gentle agitation. It must be stored under cover for at least 72 hours at a minimum water content of 10%, before mixture production.
GBS and ASS must be stored as aggregates and used within 3 months of delivery.
All constituents must be protected from freezing to ensure suitability for use.