ASTM C685/C685M-10
(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
A1.2.1 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. )
A1.1.1 This annex includes test procedures and uniformity requirements for use in the evaluation of concrete produced in conformance with Specification C685/C685M by an individual batching-mixing unit, loaded to rated capacity.
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Designation: C685/C685M – 10
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 Department of Defense.
1. Scope* 2. Referenced Documents
3
1.1 This specification covers concrete made from materials 2.1 ASTM Standards:
continuously batched by volume, mixed in a continuous mixer, C31/C31M Practice for Making and Curing Concrete Test
and delivered to the purchaser in a freshly mixed and unhard- Specimens in the Field
ened state as hereinafter specified. Requirements for quality of C33 Specification for Concrete Aggregates
concrete shall be either as hereinafter specified or as specified C39/C39M Test Method for Compressive Strength of Cy-
bythepurchaser.Whentherequirementsofthepurchaserdiffer lindrical Concrete Specimens
from this specification, the purchaser’s specification shall C94/C94M Specification for Ready-Mixed Concrete
govern. This specification does not cover the placement, C125 Terminology Relating to Concrete and Concrete Ag-
consolidation, finishing, curing, or protection of the concrete gregates
after delivery to the purchaser. Tests and criteria for batching C127 Test Method for Density, Relative Density (Specific
accuracy and mixing efficiency are specified herein. Gravity), and Absorption of Coarse Aggregate
1.2 The values stated in either SI units, shown in brackets, C136 Test Method for Sieve Analysis of Fine and Coarse
or inch-pound units are to be regarded separately as standard. Aggregates
The values stated in each system may not be exact equivalents; C138/C138M Test Method for Density (Unit Weight),
therefore,eachsystemshallbeusedindependentlyoftheother. Yield, and Air Content (Gravimetric) of Concrete
Combining values from the two systems may result in noncon- C143/C143M Test Method for Slump of Hydraulic-Cement
formance with the standard. Concrete
1.3 This specification references notes and footnotes which C150 Specification for Portland Cement
provide explanatory material. These notes and footnotes (ex- C173/C173M Test Method for Air Content of Freshly
cluding those in tables and figures) shall not be considered as Mixed Concrete by the Volumetric Method
requirements of this specification. C231 Test Method for Air Content of Freshly Mixed Con-
1.4 This standard does not purport to address all the safety crete by the Pressure Method
concerns, if any, associated with its use. It is the responsibility C260 Specification for Air-Entraining Admixtures for Con-
of the user of this standard to establish appropriate safety and crete
health practices and determine the applicability of regulatory C330 Specification for Lightweight Aggregates for Struc-
limitations prior to use. (Warning—Fresh hydraulic cementi- tural Concrete
tious mixtures are caustic and may cause chemical burns to C494/C494M Specification for Chemical Admixtures for
2
skin and tissue upon prolonged use. ) 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
1
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
C09.40 on Ready-Mixed Concrete.
Current edition approved Feb. 1, 2010. Published March 2010. Originally
3
approved in 1971. Last previous edition approved in 2007 as C685/C685M–07. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
DOI: 10.1520/C0685_C0685M-10. 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
---------------------- Page: 1 ----------------------
C685/C685M – 10
C1017/C1017M Specification for ChemicalAdmixtures for 5.1.1 Cement—Cement shall conform to Specification
Use in Producing Flowing Concrete C150, Specification C595, or Specification C1157 (Note 2).
C1064/C1064M Test Method for Temperature of Freshly The purchaser shall specify the type or types required, bu
...
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–07 Designation: C685/C685M – 10
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 Department of Defense.
1. Scope*
1.1This1.1 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. )
2. Referenced Documents
3
2.1 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
1
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.40 on
Ready-Mixed Concrete.
Current edition approved JuneFeb. 1, 2007.2010. Published July 2007.March 2010. Originally approved in 1971. Last previous edition approved in 2001as
C685/C685M–01.C685/C685M–07. DOI: 10.1520/C0685_C0685M-107.
2
See Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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
---------------------- Page: 1 ----------------------
C685/C685M – 10
C637 Specification for Aggregates for Radiation-Shielding Concrete
C989 Specification for Slag
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:C 685/C 685M–01 Designation: C685/C685M – 10
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 (ϵ) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1This 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. Tests and criteria for batching accuracy and mixing efficiency
are specified herein. *
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. )
2. Referenced Documents
3
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field
C33 Specification for Concrete Aggregates
2
C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens
C109/C 109MTest Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube Specimens)
Test Method for Compressive Strength of Cylindrical Concrete Specimens
C94/C94M Specification for Ready-Mixed Concrete
C125 Terminology Relating to Concrete and Concrete Aggregates
2
C127 Test Method for Specific Gravity and Absorption of Coarse Aggregate Test Method for Density, Relative Density
(Specific Gravity), and Absorption of Coarse Aggregate
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C138138/C138M Test Method for Density (Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
C143/C143M Test Method for Slump of Hydraulic-Cement Concrete
1
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.40 on
Ready-Mixed Concrete.
Current edition approved Aug. 10, 2001. Published October 2001. Originally published as C 685–71 T. Last previous edition C 685–00a.
Current edition approved Feb. 1, 2010. Published March 2010. Originally approved in 1971. Last previous edition approved in 2007 as C685/C685M–07. DOI:
10.1520/C0685_C0685M-10.
2
Annual Book of ASTM Standards, Vol 04.02.
2
See Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
3
Annual Book of ASTM Standards, Vol 04.01.
3
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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
...
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