ASTM C685/C685M-17
(Specification)Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing
Standard Specification for Concrete Made by Volumetric Batching and Continuous Mixing
ABSTRACT
This specification covers concrete made by volumetric batching and continuous mixing. 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. Materials such as cement, aggregates, water, ground granulated blast-furnace slag, air-entraining admixtures, and chemical admixtures shall conform to the requirements covered in this specification. The material shall be subjected to the following test methods: compression test specimens; compression tests; yield; unit weight; air content; slump; and temperature.
SIGNIFICANCE AND USE
A1.2 Significance and Use
A1.2.1 These tests and requirements are used to evaluate loading and operating procedures; verify the accuracy of proportioning and indicating systems; and determine if mixing uniformity has been degraded by excessive wear or by accumulations of hardened concrete, or both (Note A1.1).
Note A1.1: The method of loading the batching-mixing unit, proper maintenance, and other factors may have an effect on the ability of the unit to produce uniformly mixed concrete. For this reason, the use of this test method not only measures the efficiency of the mixer, but also the combined effect of the method of loading and operating the unit.
A1.2.2 This annex provides additional procedures and cautions that are necessary in the application of existing test methods and practices when used to determine the uniformity of freshly mixed concrete.
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.2)
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:C685/C685M −17
Standard Specification for
Concrete Made by Volumetric Batching and Continuous
1
Mixing
This standard is issued under the fixed designation C685/C685M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
1.1 This specification covers concrete made from materials
Barriers to Trade (TBT) Committee.
continuously batched by volume, mixed in a continuous mixer,
and delivered to the purchaser in a freshly mixed and unhard-
2. Referenced Documents
ened state as hereinafter specified. Requirements for quality of
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2.1 ASTM Standards:
concrete shall be either as hereinafter specified or as specified
C31/C31M Practice for Making and Curing Concrete Test
bythepurchaser.Whentherequirementsofthepurchaserdiffer
Specimens in the Field
from this specification, the purchaser’s specification shall
C33/C33M Specification for Concrete Aggregates
govern. This specification does not cover the placement,
C39/C39M Test Method for Compressive Strength of Cylin-
consolidation, finishing, curing, or protection of the concrete
drical Concrete Specimens
after delivery to the purchaser. Tests and criteria for batching
C94/C94M Specification for Ready-Mixed Concrete
accuracy and mixing efficiency are specified herein.
C125 Terminology Relating to Concrete and Concrete Ag-
1.2 The values stated in either SI units, shown in brackets,
gregates
or inch-pound units are to be regarded separately as standard.
C127 Test Method for Relative Density (Specific Gravity)
The values stated in each system may not be exact equivalents;
and Absorption of Coarse Aggregate
therefore,eachsystemshallbeusedindependentlyoftheother.
C136/C136M Test Method for Sieve Analysis of Fine and
Combining values from the two systems may result in noncon-
Coarse Aggregates
formance with the standard.
C138/C138M Test Method for Density (Unit Weight),Yield,
1.3 This specification references notes and footnotes which
and Air Content (Gravimetric) of Concrete
provide explanatory material. These notes and footnotes (ex-
C143/C143M Test Method for Slump of Hydraulic-Cement
cluding those in tables and figures) shall not be considered as
Concrete
requirements of this specification.
C150/C150M Specification for Portland Cement
C172/C172M Practice for Sampling Freshly Mixed Con-
1.4 This standard does not purport to address all the safety
crete
concerns, if any, associated with its use. It is the responsibility
C173/C173M Test Method forAir Content of Freshly Mixed
of the user of this standard to establish appropriate safety and
Concrete by the Volumetric Method
health practices and determine the applicability of regulatory
C231/C231M Test Method forAir Content of Freshly Mixed
limitations prior to use. (Warning—Fresh hydraulic cementi-
Concrete by the Pressure Method
tious mixtures are caustic and may cause chemical burns to
2
C260/C260M Specification for Air-Entraining Admixtures
skin and tissue upon prolonged use. )
for Concrete
1.5 This international standard was developed in accor-
C330/C330M Specification for Lightweight Aggregates for
dance with internationally recognized principles on standard-
Structural Concrete
ization established in the Decision on Principles for the
C494/C494M Specification for Chemical Admixtures for
Concrete
1
This specification is under the jurisdiction of ASTM Committee C09 on
C567/C567M Test Method for Determining Density of
Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee
C09.40 on Ready-Mixed Concrete.
Current edition approved Dec. 1, 2017. Published December 2017. Originally
3
approved in 1971. Last previous edition approved in 2014 as C685/C685M–14. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/C0685_C0685M-17. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
2
See Section on Safety Precautions, Manual ofAggregate and Concrete Testing, Standards volume information, refer to the standard’s Document Summary page on
Annual Book of ASTM Standards, Vol 04.02. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C685/C685M − 14 C685/C685M − 17
Standard Specification for
Concrete Made by Volumetric Batching and Continuous
1
Mixing
This standard is issued under the fixed designation C685/C685M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
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
2
tissue upon prolonged use. )
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
3
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field
C33C33/C33M 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 Relative Density (Specific Gravity) and Absorption of Coarse Aggregate
C136C136/C136M 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/C150M Specification for Portland Cement
C172/C172M Practice for Sampling Freshly Mixed Concrete
1
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee C09.40 on
Ready-Mixed Concrete.
Current edition approved Dec. 15, 2014Dec. 1, 2017. Published February 2015December 2017. Originally approved in 1971. Last previous edition approved in 20112014
as C685/C685M–11.–14. DOI: 10.1520/C0685_C0685M-14.10.1520/C0685_C0685M-17.
2
See Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C685/C685M − 17
C173/C173M Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method
C231C231/C231M Test Method for Air Content of Freshly Mixed Concrete by the Pres
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