The proportions of the aggregates shall be such as to produce a concrete mixture that
will work readily into the corners and angles of the forms and around reinforcement
when consolidated, but will not segregate or exclude free water during consolidation.
Prior to placement of concrete, the developer/contractor shall furnish the engineer/public
works representative for approval, a statement of the materials and mix proportions
(including admixtures, if any) he intends to use. The statement shall include evidence
satisfactory to the engineer/public works representative that the materials and the
proportions will produce concrete conforming to this specification. The materials
and proportions so stated shall constitute the "job mix." After a job mix has been
approved, neither the source, character of grading the aggregates nor the type or
brand of cement or admixture shall be changed without prior notice to the engineer/public
works representative.
(Ord. No. 2007-07-31, § 12.5, 7-10-2007)
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