ASTM C685/C685M-07

    Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing

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    1. 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.

    1.3 This specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this specification.

    1.4 This standard does not purport to address all the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ( Warning-Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged use.)

    1.5 This annex includes test procedures and uniformity requirements for use in the evaluation of concrete produced in conformance with Specification C 685/C 685M by an individual batching-mixing unit, loaded to rated capacity.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field

    C33 Specification for Concrete Aggregates

    C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens

    C94/C94M Specification for Ready-Mixed Concrete

    C125 Terminology Relating to Concrete and Concrete Aggregates

    C127 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Coarse Aggregate

    C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates

    C138/C138M Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete

    C143/C143M Test Method for Slump of Hydraulic-Cement Concrete

    C150 Specification for Portland Cement

    C173/C173M Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method

    C231 Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    C260 Specification for Air-Entraining Admixtures for Concrete

    C330 Specification for Lightweight Aggregates for Structural Concrete

    C494/C494M Specification for Chemical Admixtures for Concrete

    C567 Test Method for Determining Density of Structural Lightweight Concrete

    C595 Specification for Blended Hydraulic Cements

    C637 Specification for Aggregates for Radiation-Shielding Concrete

    C989 Specification for Slag Cement for Use in Concrete and Mortars

    C1017/C1017M Specification for Chemical Admixtures for Use in Producing Flowing Concrete

    C1064/C1064M Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete

    C1077 Practice for Agencies Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Testing Agency Evaluation

    C1157 Performance Specification for Hydraulic Cement

    C1602/C1602M Specification for Mixing Water Used in the Production of Hydraulic Cement Concrete


    ICS Code

    ICS Number Code 91.100.30 (Concrete and concrete products)

    UNSPSC Code

    UNSPSC Code 30111500(Concrete and mortars)


    DOI: 10.1520/C0685_C0685M-07

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