Mixers will be stationary mixers or truck mixers. Except as otherwise specifically permitted, cement, aggregate, and admixtures shall be measured by mass. In the absence of designated applicable materials specifications, materials specifications specified shall be used for cementitious materials, hydraulic cement, supplementary cementitious materials, cementitious concrete mixtures, aggregates, air-entraining admixtures, and chemical admixtures. In any case where the requirements of the purchaser differ from these in this specification, the purchaser's specification shall govern. Requirements for quality of concrete shall be either as hereinafter specified or as specified by the purchase. Scope This specification covers ready-mixed concrete manufactured and delivered to a purchaser in freshly mixed and unhardened state as hereinafter specified.
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