本规范涵盖以下规定的以新拌和未硬化状态制造并交付给买方的预拌混凝土。混凝土质量要求应符合下文规定或买方规定。如果买方的要求与本规范中的要求不同，则以买方的规范为准。本规范不包括交付给买方后混凝土的浇筑、固结、养护或保护。

This specification covers ready-mixed concrete manufactured and delivered to a purchaser in a freshly mixed and unhardened state as hereinafter specified. Requirements for quality of concrete shall be either as hereinafter specified or as specified by the purchaser. In any case where the requirements of the purchaser differ from those in this specification, the purchaser's specification shall govern. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser.