ASTM C685/C685M − 14 Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing

ASTM C685/C685M − 14 Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing

Scope
1.1 This specification covers concrete made from materials continuously batched by volume, mixed in a continuous mixer, and delivered to the 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.

When the requirements of the purchaser differ from this specification, the purchaser’s specification shall govern.

This specification does not cover the placement, consolidation, finishing, curing, or protection of the concrete after delivery to the purchaser.

Tests and criteria for batching accuracy and mixing efficiency are specified herein.

1.2 The values stated in either SI units, shown in brackets, or inch-pound units are to be regarded separately as standard.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

Combining values from the two systems may result in nonconformance with the standard.

ASTM C685/C685M − 14 Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing

Basis of Purchase
4.1 The basis of purchase shall be the cubic yard or cubic metre of fresh concrete as it is continuously discharged from the batching and mixing apparatus.