BATCHING. The Contractor shall provide equipment and shall maintain and operate the equipment as required to accurately determine and control the amount of each separate ingredient entering the concrete. For concrete Class C20P and higher, the amounts of sand, bulk cement and each size of coarse aggregate entering each batch of concrete shall be determined by weighing, and the amount of water shall be determined by weighing or volumetric measurement. Where sacked cement is used, the amount of cement entering the mixture shall be determined on the basis of integral sacks of cement and the use of cement from torn bags shall not be permitted. For concrete Class C15P and lower, the Engineer may permit volumetric measurement of aggregates. All weighing equipment shall be subject to the Engineer’s approval. An accuracy to within
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Sources: Construction Contract, Construction Contract