ASTM C1761/C1761M-13a

Standard Specification for Lightweight Aggregate for Internal Curing of Concrete

SCOPE
1.1 This specification covers lightweight aggregate intended to provide water for internal curing of concrete. It includes test methods for determining the absorption and desorption properties of lightweight aggregate. Note 1—Internal curing provides an additional source of water to sustain hydration and substantially reduce the early-age autogenous shrinkage and self-desiccation that can be significant contributors to early-age cracking. Appendix X1 provides guidance on calculating the quantity of lightweight aggregate for internal curing.  
1.2 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 non-conformance. Some values have only SI units because the inch-pound equivalents are not used in practice. Note 2—Sieve size is identified by its standard designation in Specification E11. The alternative designation given in parentheses is for information only and does not represent a different standard sieve size.  
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 14-Jun-2013
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.21 - Lightweight Aggregates and Concrete

Relations

• Replaces: ASTM C1761/C1761M-13 - Standard Specification for Lightweight Aggregate for Internal Curing of Concrete
• Effective Date: 15-Jun-2013
• Replaced By: ASTM C1761/C1761M-13b - Standard Specification for Lightweight Aggregate for Internal Curing of Concrete
• Effective Date: 01-Aug-2013
• Referred By: ASTM C641-23 - Standard Test Method for Iron Staining Materials in Lightweight Concrete Aggregates
• Effective Date: 15-Jun-2013

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1761/C1761M −13a
StandardSpecification for
1
Lightweight Aggregate for Internal Curing of Concrete
This standard is issued under the fixed designation C1761/C1761M; 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 C40 Test Method for Organic Impurities in FineAggregates
for Concrete
1.1 Thisspecificationcoverslightweightaggregateintended
C87 Test Method for Effect of Organic Impurities in Fine
to provide water for internal curing of concrete. It includes test
Aggregate on Strength of Mortar
methods for determining the absorption and desorption prop-
C114 Test Methods for Chemical Analysis of Hydraulic
erties of lightweight aggregate.
Cement
NOTE 1—Internal curing provides an additional source of water to
C125 Terminology Relating to Concrete and Concrete Ag-
sustain hydration and substantially reduce the early-age autogenous
shrinkage and self-desiccation that can be significant contributors to
gregates
early-age cracking. Appendix X1 provides guidance on calculating the
C128 Test Method for Density, Relative Density (Specific
quantity of lightweight aggregate for internal curing.
Gravity), and Absorption of Fine Aggregate
1.2 The values stated in either SI units or inch-pound units
C136 Test Method for Sieve Analysis of Fine and Coarse
are to be regarded separately as standard. The values stated in
Aggregates
each system may not be exact equivalents; therefore, each
C142 Test Method for Clay Lumps and Friable Particles in
system shall be used independently of the other. Combining
Aggregates
values from the two systems may result in non-conformance.
C330/C330M Specification for Lightweight Aggregates for
Some values have only SI units because the inch-pound
Structural Concrete
equivalents are not used in practice.
C641 Test Method for Iron Staining Materials in Light-
NOTE 2—Sieve size is identified by its standard designation in Speci-
weight Concrete Aggregates
fication E11. The alternative designation given in parentheses is for
C702 PracticeforReducingSamplesofAggregatetoTesting
information only and does not represent a different standard sieve size.
Size
1.3 The text of this standard references notes and footnotes
C1498 Test Method for Hygroscopic Sorption Isotherms of
that provide explanatory material. These notes and footnotes
Building Materials
(excluding those in tables and figures) shall not be considered
C1608 Test Method for Chemical Shrinkage of Hydraulic
as requirements of the standard.
Cement Paste
1.4 This standard does not purport to address all of the
C1698 Test Method for Autogenous Strain of Cement Paste
safety concerns, if any, associated with its use. It is the
and Mortar
responsibility of the user of this standard to establish appro-
D75 Practice for Sampling Aggregates
priate safety and health practices and determine the applica-
E11 Specification for Woven Wire Test Sieve Cloth and Test
bility of regulatory limitations prior to use.
Sieves
3. Terminology
2. Referenced Documents
2
3.1 Definitions:
2.1 ASTM Standards:
3.1.1 For definitions of terms used in this practice, refer to
C29/C29M Test Method for Bulk Density (“Unit Weight”)
Terminology C125.
and Voids in Aggregate
3.2 Definitions of Terms Specific to This Standard:
3.2.1 absorption, A ,n—of lightweight aggregate, the in-
72
1 creaseinmassofaspecimenofoven-drylightweightaggregate
This specification is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee due to water penetrating into the permeable pores of the
C09.21 on Lightweight Aggregates and Concrete.
particles after being submerged for 72 h, expressed as percent-
Current edition approved June 15, 2013. Published August 2013. Originally
age of oven-dry mass.
approved in 2012. Last previous edition approved in 2013 as C1761/C1761M – 13.
DOI: 10.1520/C1761_C1761M-13a.
3.2.2 autogenous shrinkage, n—reduction in volume due to
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
chemical shrinkage of a sealed cementitious mixture, not
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
subjected to external forces and under constant temperature,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. measured from the time of final setting.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1761/C1761M−13a
3.2.2.1 Discussion—The chemical shrinkage leads to emp- M = mass of normal w
...

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: C1761/C1761M − 13 C1761/C1761M − 13a
Standard Specification for
1
Lightweight Aggregate for Internal Curing of Concrete
This standard is issued under the fixed designation C1761/C1761M; 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
1.1 This specification covers lightweight aggregate intended to provide water for internal curing of concrete. It includes test
methods for determining the absorption and desorption properties of lightweight aggregate.
NOTE 1—Internal curing provides an additional source of water to sustain hydration and substantially reduce the early-age autogenous shrinkage and
self-desiccation that can be significant contributors to early-age cracking. Appendix X1 provides guidance on calculating the quantity of lightweight
aggregate for internal curing.
1.2 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 non-conformance. Some values have only SI units because the inch-pound equivalents are not used in
practice.
NOTE 2—Sieve size is identified by its standard designation in Specification E11. The alternative designation given in parentheses is for information
only and does not represent a different standard sieve size.
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.4 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C29/C29M Test Method for Bulk Density (“Unit Weight”) and Voids in Aggregate
C40 Test Method for Organic Impurities in Fine Aggregates for Concrete
C87 Test Method for Effect of Organic Impurities in Fine Aggregate on Strength of Mortar
C114 Test Methods for Chemical Analysis of Hydraulic Cement
C125 Terminology Relating to Concrete and Concrete Aggregates
C128 Test Method for Density, Relative Density (Specific Gravity), and Absorption of Fine Aggregate
C136 Test Method for Sieve Analysis of Fine and Coarse Aggregates
C142 Test Method for Clay Lumps and Friable Particles in Aggregates
C330/C330M Specification for Lightweight Aggregates for Structural Concrete
C641 Test Method for Iron Staining Materials in Lightweight Concrete Aggregates
C702 Practice for Reducing Samples of Aggregate to Testing Size
C1498 Test Method for Hygroscopic Sorption Isotherms of Building Materials
C1608 Test Method for Chemical Shrinkage of Hydraulic Cement Paste
C1698 Test Method for Autogenous Strain of Cement Paste and Mortar
D75 Practice for Sampling Aggregates
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
1
This specification is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.21 on
Lightweight Aggregates and Concrete.
Current edition approved May 15, 2013June 15, 2013. Published July 2013August 2013. Originally approved in 2012. Last previous edition approved in 20122013 as
C1761/C1761M – 12.C1761/C1761M – 13. DOI: 10.1520/C1761_C1761M-13.10.1520/C1761_C1761M-13a.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1761/C1761M − 13a
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this practice, refer to Terminology C125.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 absorption, A , n—of lightweight aggregate, the increase in mass of a specimen of oven-dry lightweight aggregate due
72
to water penetrating into the permeable pores of th
...