ASTM C1798/C1798M-19
(Specification)Standard Specification for Returned Fresh Concrete for Use in a New Batch of Ready-Mixed Concrete
Standard Specification for Returned Fresh Concrete for Use in a New Batch of Ready-Mixed Concrete
ABSTRACT
This specification covers requirements for returned fresh concrete for use in a new batch of ready-mixed concrete, as well as the requirements specified by the purchaser. If the requirements of the purchaser differ from those prescribed in this specification, the purchaser's requirements shall take precedence. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser, and by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete.
This specification covers: ordering information; measuring materials; requirements for use; and information to be reported by the manufacturer to the purchaser, such as the amount of returned fresh concrete in cubic meters [cubic yards] and information for certification purposes as designated by the purchaser and required by the job specifications.
SCOPE
1.1 This specification covers returned fresh concrete for use in a new batch of ready-mixed concrete. Requirements for returned fresh concrete shall be either as hereinafter specified or as specified by the purchaser. In any case where the requirements of the purchaser differ from those in this specification, the purchaser’s requirements shall govern. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser.
1.2 This specification by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete.
Note 1: The permission to use returned fresh concrete may be addressed in purchase documents, which may reference this specification.
1.3 Returned fresh concrete in a quantity of less than 450 kg [1000 lb] or 0.2 m3 [0.25 yd3] shall not be subject to this specification.
1.4 The values stated in either SI units 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.
1.5 The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes shall not be considered as requirements of the standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental 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)
1.7 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.
General Information
- Status
- Published
- Publication Date
- 31-Dec-2018
- Technical Committee
- C09 - Concrete and Concrete Aggregates
- Drafting Committee
- C09.40 - Ready-Mixed Concrete
Relations
- Effective Date
- 01-Jan-2019
- Effective Date
- 01-Apr-2024
- Effective Date
- 01-Jan-2024
- Effective Date
- 01-Dec-2023
- Effective Date
- 15-Dec-2019
- Effective Date
- 01-Jul-2019
- Effective Date
- 01-Jan-2019
- Effective Date
- 01-Oct-2018
- Effective Date
- 01-Jul-2018
- Effective Date
- 01-Jan-2018
- Effective Date
- 01-Aug-2017
- Effective Date
- 01-Mar-2017
- Effective Date
- 15-Dec-2016
- Effective Date
- 01-Aug-2016
- Effective Date
- 01-Jul-2016
Overview
ASTM C1798/C1798M-19 is an international standard specification established by ASTM International, detailing the requirements for incorporating returned fresh concrete into new batches of ready-mixed concrete. Its primary focus is to ensure the responsible and efficient reuse of fresh, unset concrete returned to the manufacturer, promoting sustainability and resource optimization within the concrete industry. The specification outlines terms, measurement methods, ordering requirements, use limitations, and manufacturer reporting duties, ensuring that the new concrete produced with returned material continues to meet quality and performance expectations.
Key Topics
- Definition of Returned Fresh Concrete: The standard defines "returned fresh concrete" as concrete that has not yet been discharged from a ready-mixed concrete transportation unit and is returned to the manufacturer.
- Quantity Threshold: Only returned fresh concrete exceeding 450 kg (1000 lbs) or 0.2 m³ (0.25 yd³) falls within the scope of ASTM C1798/C1798M-19.
- Purchaser's Requirements: Where purchaser specifications differ from those in the standard, the purchaser's requirements take precedence.
- Measurement and Mixing Requirements:
- Returned concrete must be measured by mass or volume with prescribed accuracy.
- Water and admixtures added after initial loading must be measured precisely.
- Temperature controls are crucial, with the maximum allowable temperature of returned concrete not to exceed 38°C (100°F).
- Proportion and uniformity of the final mix must consider the properties of the returned material.
- Use of Admixtures:
- Hydration-stabilizing admixtures may be required for concrete older than 90 minutes to delay setting and allow safe reuse.
- The total time before returned concrete must be used is set, with optimized admixture dosing determined by the concrete manufacturer.
- Reporting: Manufacturers must provide detailed batch data, including the quantity and handling of returned fresh concrete, to the purchaser before unloading at the job site.
Applications
The use of ASTM C1798/C1798M-19 brings operational, environmental, and economic benefits across the concrete supply chain:
- Ready-Mixed Concrete Plants: Allows for the sustainable reuse of returned concrete, minimizing material waste and supporting greener production practices.
- Project Owners & Contractors: Ensures that any concrete containing returned material meets specified mix design and quality standards, while also enhancing accountability and transparency through comprehensive manufacturer reporting.
- Quality Control & Certification: Provides a robust framework for verifying that concrete containing returned fresh concrete meets necessary strength, consistency, and durability criteria.
- Regulatory & Environmental Compliance: Facilitates adherence to environmental regulations and sustainability targets by promoting recycling and reduction of concrete waste.
Related Standards
To implement this specification effectively, familiarity with related standards is valuable:
- ASTM C94/C94M - Standard Specification for Ready-Mixed Concrete: The principal reference for the production and delivery of ready-mixed concrete, including general quality and performance requirements.
- ASTM C125 - Terminology Relating to Concrete and Concrete Aggregates: Essential for consistent understanding of terminology.
- ASTM C494/C494M - Standard Specification for Chemical Admixtures for Concrete: Covers requirements for admixtures used, such as hydration stabilizers.
- ASTM C1064/C1064M - Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete: Specifies test procedures to ensure proper temperature control.
By adhering to ASTM C1798/C1798M-19, stakeholders in the concrete industry can optimize resource use, meet sustainability goals, and maintain high standards of concrete quality when using returned fresh concrete in new batches of ready-mixed concrete.
Buy Documents
ASTM C1798/C1798M-19 - Standard Specification for Returned Fresh Concrete for Use in a New Batch of Ready-Mixed Concrete
REDLINE ASTM C1798/C1798M-19 - Standard Specification for Returned Fresh Concrete for Use in a New Batch of Ready-Mixed Concrete
Get Certified
Connect with accredited certification bodies for this standard
ICC Evaluation Service
Building products evaluation and certification.
QAI Laboratories
Building and construction product testing and certification.
Aboma Certification B.V.
Specialized in construction, metal, and transport sectors.
Sponsored listings
Frequently Asked Questions
ASTM C1798/C1798M-19 is a technical specification published by ASTM International. Its full title is "Standard Specification for Returned Fresh Concrete for Use in a New Batch of Ready-Mixed Concrete". This standard covers: ABSTRACT This specification covers requirements for returned fresh concrete for use in a new batch of ready-mixed concrete, as well as the requirements specified by the purchaser. If the requirements of the purchaser differ from those prescribed in this specification, the purchaser's requirements shall take precedence. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser, and by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete. This specification covers: ordering information; measuring materials; requirements for use; and information to be reported by the manufacturer to the purchaser, such as the amount of returned fresh concrete in cubic meters [cubic yards] and information for certification purposes as designated by the purchaser and required by the job specifications. SCOPE 1.1 This specification covers returned fresh concrete for use in a new batch of ready-mixed concrete. Requirements for returned fresh concrete shall be either as hereinafter specified or as specified by the purchaser. In any case where the requirements of the purchaser differ from those in this specification, the purchaser’s requirements shall govern. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser. 1.2 This specification by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete. Note 1: The permission to use returned fresh concrete may be addressed in purchase documents, which may reference this specification. 1.3 Returned fresh concrete in a quantity of less than 450 kg [1000 lb] or 0.2 m3 [0.25 yd3] shall not be subject to this specification. 1.4 The values stated in either SI units 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. 1.5 The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes shall not be considered as requirements of the standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental 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) 1.7 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.
ABSTRACT This specification covers requirements for returned fresh concrete for use in a new batch of ready-mixed concrete, as well as the requirements specified by the purchaser. If the requirements of the purchaser differ from those prescribed in this specification, the purchaser's requirements shall take precedence. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser, and by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete. This specification covers: ordering information; measuring materials; requirements for use; and information to be reported by the manufacturer to the purchaser, such as the amount of returned fresh concrete in cubic meters [cubic yards] and information for certification purposes as designated by the purchaser and required by the job specifications. SCOPE 1.1 This specification covers returned fresh concrete for use in a new batch of ready-mixed concrete. Requirements for returned fresh concrete shall be either as hereinafter specified or as specified by the purchaser. In any case where the requirements of the purchaser differ from those in this specification, the purchaser’s requirements shall govern. This specification does not cover the placement, consolidation, curing, or protection of the concrete after delivery to the purchaser. 1.2 This specification by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of concrete. Note 1: The permission to use returned fresh concrete may be addressed in purchase documents, which may reference this specification. 1.3 Returned fresh concrete in a quantity of less than 450 kg [1000 lb] or 0.2 m3 [0.25 yd3] shall not be subject to this specification. 1.4 The values stated in either SI units 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. 1.5 The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes shall not be considered as requirements of the standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental 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) 1.7 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.
ASTM C1798/C1798M-19 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM C1798/C1798M-19 has the following relationships with other standards: It is inter standard links to ASTM C1798/C1798M-16e1, ASTM C94/C94M-24a, ASTM C94/C94M-24, ASTM C1064/C1064M-23, ASTM C125-19a, ASTM C94/C94M-19, ASTM C125-19, ASTM C125-18b, ASTM C125-18a, ASTM C125-18, ASTM C94/C94M-17a, ASTM C94/C94M-17, ASTM C125-16, ASTM C94/C94M-16a, ASTM C494/C494M-16. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM C1798/C1798M-19 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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:C1798/C1798M −19
Standard Specification for
Returned Fresh Concrete for Use in a New Batch of Ready-
Mixed Concrete
This standard is issued under the fixed designation C1798/C1798M; 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.
1. Scope* (Warning—Fresh hydraulic cementitious mixtures are caustic
and may cause chemical burns to skin and tissue upon
1.1 This specification covers returned fresh concrete for use
prolonged use. )
in a new batch of ready-mixed concrete. Requirements for
1.7 This international standard was developed in accor-
returned fresh concrete shall be either as hereinafter specified
dance with internationally recognized principles on standard-
or as specified by the purchaser. In any case where the
ization established in the Decision on Principles for the
requirements of the purchaser differ from those in this
Development of International Standards, Guides and Recom-
specification, the purchaser’s requirements shall govern. This
mendations issued by the World Trade Organization Technical
specification does not cover the placement, consolidation,
Barriers to Trade (TBT) Committee.
curing, or protection of the concrete after delivery to the
2. Referenced Documents
purchaser.
2.1 ASTM Standards:
1.2 This specification by itself shall not grant permission to
C94/C94M Specification for Ready-Mixed Concrete
the manufacturer to use returned fresh concrete in a new batch
C125 Terminology Relating to Concrete and Concrete Ag-
of concrete.
gregates
NOTE 1—The permission to use returned fresh concrete may be
C494/C494M Specification for Chemical Admixtures for
addressed in purchase documents, which may reference this specification.
Concrete
1.3 Returned fresh concrete in a quantity of less than 450 kg
C1064/C1064M Test Method for Temperature of Freshly
3 3
[1000 lb] or 0.2 m [0.25 yd ] shall not be subject to this
Mixed Hydraulic-Cement Concrete
specification.
3. Terminology
1.4 The values stated in either SI units or inch-pound units
3.1 Definitions—The terms used in this specification are
are to be regarded separately as standard. The values stated in
defined in Terminology C125.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining 3.2 Definitions of Terms Specific to This Standard:
values from the two systems may result in nonconformance 3.2.1 concrete, returned fresh, n—fresh concrete not yet
discharged from a ready-mixed concrete transportation unit
with the standard.
when it is returned to the manufacturer.
1.5 The text of this standard references notes and footnotes,
which provide explanatory information. These notes and foot-
4. Ordering Information
notes shall not be considered as requirements of the standard.
4.1 The new batch of concrete containing returned fresh
1.6 This standard does not purport to address all of the concrete shall meet all requirements of the purchaser.
NOTE 2—The requirements of this specification are in addition to those
safety concerns, if any, associated with its use. It is the
of the purchaser and the specification of the new batch of concrete
responsibility of the user of this standard to establish appro-
containing returned fresh concrete.
priate safety, health, and environmental practices and deter-
NOTE 3—If using Specification C94/C94M for concrete potentially
mine the applicability of regulatory limitations prior to use.
incorporating returned fresh concrete, it is recommended the purchaser
select Option A. In this option, the manufacturer has responsibility for
1 2
This specification is under the jurisdiction of ASTM Committee C09 on See Section on Safety Precautions, Manual ofAggregate and Concrete Testing,
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee Annual Book of ASTM Standards, Vol 04.02.
C09.40 on Ready-Mixed Concrete. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Jan. 1, 2019. Published January 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
ɛ1
approved in 2016. Last previous edition approved in 2016 as C1798/C1798M–16 . Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C1798_C1798M–19. 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
C1798/C1798M−19
making necessary adjustments to mixture proportions to ensure the new
6.1.2 The manufacturer of the concrete shall be responsible
concrete batch containing returned fresh concrete will meet the require-
for determining the dose of extended set control admixture.
ments of the purchaser.
6.1.3 If extended set control admixture is used, the returned
4.2 At the request of the purchaser, the manufacturer shall
fresh concrete shall be incorporated into a new batch of
furnish information on procedures used to reuse returned fresh
concrete at a time appropriate for the dose of extended set
concrete.
control admixture, but in no case more than 8 hours after the
original loading or first mixing of the returned fresh concrete.
5. Measuring Materials
6.1.4 The temperature of returned fresh concrete shall not
5.1 The amount of returned fresh concrete shall be deter-
exceed 38° C [100° F]. It shall not be permissible to cool
mined by mass or volume with equipment capable of measur-
returned fresh concrete that has exceeded 38° C [100° F]. The
ingwithinanaccuracyof 6450kg[1000lb]or 60.2m [0.25
temperature of the new concrete batch containing returned
yd ].
fresh concrete shall comply with project specifications.
5.2 If necessary to convert between the mass and volume of 6.1.5 The specified strength of the returned fresh concrete
returned fresh conc
...
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.
´1
Designation: C1798/C1798M − 16 C1798/C1798M − 19
Standard Specification for
Returned Fresh Concrete for Use in a New Batch of Ready-
Mixed Concrete
This standard is issued under the fixed designation C1798/C1798M; 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.
ε NOTE—The designation was editorially corrected to match the units of measurement statement in October 2016.
1. Scope Scope*
1.1 This specification covers returned fresh concrete for use in a new batch of ready-mixed concrete. Requirements for returned
fresh concrete shall be either as hereinafter specified or as specified by the purchaser. In any case where the requirements of the
purchaser differ from those in this specification, the purchaser’s requirements shall govern. This specification does not cover the
placement, consolidation, curing, or protection of the concrete after delivery to the purchaser.
1.2 This specification by itself shall not grant permission to the manufacturer to use returned fresh concrete in a new batch of
concrete.
NOTE 1—The permission to use returned fresh concrete may be addressed in purchase documents, which may reference this specification.
3 3
1.3 Returned fresh concrete in a quantity of less than 450 kg [1000 lb] or 0.2 m [0.25 yd ] shall not be subject to this
specification.
1.4 The values stated in either SI units 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.
1.5 The text of this standard references notes and footnotes, which provide explanatory information. These notes and footnotes
shall not be considered as requirements of the standard.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental 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. )
1.7 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
2.1 ASTM Standards:
C94/C94M Specification for Ready-Mixed Concrete
C125 Terminology Relating to Concrete and Concrete Aggregates
C494/C494M Specification for Chemical Admixtures for Concrete
C1064/C1064M Test Method for Temperature of Freshly Mixed Hydraulic-Cement Concrete
3. Terminology
3.1 Definitions—The terms used in this specification are defined in Terminology C125.
3.2 Definitions of Terms Specific to This Standard:
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 March 15, 2016Jan. 1, 2019. Published April 2016January 2019. Originally approved in 2016. Last previous edition approved in 2016 as
ɛ1
C1798/C1798M–16 . DOI: 10.1520/C1798_C1798M–16E01.10.1520/C1798_C1798M–19.
See Section on Safety Precautions, Manual of Aggregate and Concrete Testing, Annual Book of ASTM Standards, Vol 04.02.
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
C1798/C1798M − 19
3.2.1 admixture, hydration stabilizing, n—set-retarding admixture, conforming to Specification C494/C494M Type B or D, that
can predictably reduce the hydration rate of cement for applications requiring the management of time of setting of returned
concrete, reducing the hydration rate of cement fines in water from concrete production, or for applications requiring extended
delivery time of ready-mixed concrete.
3.2.1 concrete, returned fresh, n—fresh concrete not yet discharged from a ready-mixed concrete transportation unit when it is
returned to the manufacturer.
4. Ordering Information
4.1 The new batch of concrete containing returned fresh concrete shall meet all requirements of the purchaser.
NOTE 2—The requirements of this specification are in addition to those of the purchaser and the specification of the new batch of concrete containing
returned fresh concrete.
NOTE 3—If using Specification C94/C94M for concrete potentially incorporating returned fresh concrete, it is recommended the purchaser select Option
A. In this option, the manufacturer has responsibility for making necessary adjustments to mixture proportions to ensure the new concrete batch containing
returned fresh concrete will meet the requirements of the purchaser.
4.2 At the request of the purchaser, the manufacturer shall furnish information on procedures used to reuse returned fresh
concrete.
5. Measuring Materials
5.1 The amount of returned fresh concrete shall be determined by mass or volume with equipment capable of measuring within
3 3
an accuracy of 6 450 kg [1000 lb] or 6 0.2 m [0.25 yd ].
5.2 If necessary to convert between the mass and volume of returned fresh concrete, it shall be permissible to use the measured
or design density of the returned fresh concrete.
5.3 Water added to the returned fresh concrete after the original loading of the returned fresh concrete until loading of the new
batch of concrete shall be measured to an accuracy of 6 3 % of the amount added or 4 liters [1.0 gal], whichever is greater.
5.4 Admixtures added to the returned fresh concrete after the original loading of the returned fresh concrete until loading of the
new batch of concrete, whether in liquid
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...