ASTM C642-13

Standard Test Method for Density, Absorption, and Voids in Hardened Concrete

SIGNIFICANCE AND USE
2.1 This test method is useful in developing the data required for conversions between mass and volume for concrete. It can be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of concrete.
SCOPE
1.1 This test method covers the determinations of denisty, percent absorption, and percent voids in hardened concrete.  
1.2 The text of this test method references notes and footnotes which provide explanatory information. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.  
1.3 The values stated in SI units are to be regarded as 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: 31-Jan-2013
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.66 - Concrete's Resistance to Fluid Penetration

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C642 − 13
Standard Test Method for
1
Density, Absorption, and Voids in Hardened Concrete
This standard is issued under the fixed designation C642; 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* 5. Procedure
1.1 This test method covers the determinations of density,
5.1 Oven-Dry Mass—Determine the mass of the portions,
percent absorption, and percent voids in hardened concrete.
and dry in an oven at a temperature of 110 6 5°C for not less
than 24 h.After removing each specimen from the oven, allow
1.2 The text of this test method references notes and
ittocoolindryair(preferablyinadesiccator)toatemperature
footnotes which provide explanatory information. These notes
of 20 to 25°C and determine the mass. If the specimen was
and footnotes (excluding those in tables and figures) shall not
comparatively dry when its mass was first determined, and the
be considered as requirements of this standard.
second mass closely agrees with the first, consider it dry. If the
1.3 The values stated in SI units are to be regarded as the
specimen was wet when its mass was first determined, place it
standard.
in the oven for a second drying treatment of 24 h and again
1.4 This standard does not purport to address all of the
determine the mass. If the third value checks the second,
safety concerns, if any, associated with its use. It is the consider the specimen dry. In case of any doubt, redry the
responsibility of the user of this standard to establish appro-
specimen for 24-h periods until check values of mass are
priate safety and health practices and determine the applica- obtained. If the difference between values obtained from two
bility of regulatory limitations prior to use.
successive values of mass exceeds 0.5% of the lesser value,
return the specimens to the oven for an additional 24-h drying
2. Significance and Use
period, and repeat the procedure until the difference between
2.1 This test method is useful in developing the data anytwosuccessivevaluesislessthan0.5%ofthelowestvalue
required for conversions between mass and volume for con- obtained. Designate this last value A.
crete. It can be used to determine conformance with specifica-
5.2 Saturated Mass After Immersion—Immerse the
tions for concrete and to show differences from place to place
specimen, after final drying, cooling, and determination of
within a mass of concrete.
mass,inwateratapproximately21°Cfornotlessthan48hand
untiltwosuccessivevaluesofmassofthesurface-driedsample
3. Apparatus
atintervalsof24hshowanincreaseinmassoflessthan0.5%
3.1 Balance, sensitive to 0.025 % of the mass of the
of the larger value. Surface-dry the specimen by removing
specimen.
surface moisture with a towel, and determine the mass.
3.2 Container, suitable for immersing the specimen and
Designate the final surface-dry mass after immersion B.
suitable wire for suspending the specimen in water.
5.3 Saturated Mass After Boiling—Place the specimen,
processed as described in 5.2, in a suitable receptacle, covered
4. Test Specimen
with tap water, and boil for 5 h.Allow it to cool by natural loss
4.1 Whenever possible, the sample shall consist of several
of heat for not less than 14 h to a final temperature of 20 to
individual portions of concrete, each to be tested separately.
25°C.Removethesurfacemoisturewithatowelanddetermine
The individual portions may be pieces of cylinders, cores, or
the mass of the specimen. Designate the soaked, boiled,
beams of any desired shape or size, except that the volume of
surface-dried mass C.
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each portion shall be not less than 350 cm (or for normal
5.4 Immersed Apparent Mass—Suspend the specimen, after
weight concrete, approximately 800 g); and each portion shall
immersion and boiling, by a wire and determine the apparent
be free from observable cracks, fissures, or shattered edges.
mass in water. Designate this apparent mass D.
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This test method is under the jurisdiction of ASTM Committee C09 on
6. Calculation
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
C09.66 on Concrete’s Resistance to Fluid Penetration.
6.1 By using the values for mass determined in accordance
Current edition approved Feb. 1, 2013. Published February 2013. Originally
withtheproceduresdescribedinSection5,makethefollowing
approved in 1969. Last previous edition approved in 2006 as C642–06. DOI:
10.1520/C0642-13. calculations:
*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
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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: C642 − 06 C642 − 13
Standard Test Method for
1
Density, Absorption, and Voids in Hardened Concrete
This standard is issued under the fixed designation C642; 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 test method covers the determinations of denisty, percent absorption, and percent voids in hardened concrete.
1.2 The text of this test method references notes and footnotes which provide explanatory information. These notes and
footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard.
1.3 The values stated in SI units are to be regarded as 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. Significance and Use
2.1 This test method is useful in developing the data required for conversions between mass and volume for concrete. It can
be used to determine conformance with specifications for concrete and to show differences from place to place within a mass of
concrete.
3. Apparatus
3.1 Balance, sensitive to 0.025 % of the mass of the specimen.
3.2 Container, suitable for immersing the specimen and suitable wire for suspending the specimen in water.
4. Test Specimen
4.1 Whenever possible, the sample shall consist of several individual portions of concrete, each to be tested separately. The
individual portions may be pieces of cylinders, cores, or beams of any desired shape or size, except that the volume of each portion
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shall be not less than 350 cm (or for normal weight concrete, approximately 800 g); and each portion shall be free from observable
cracks, fissures, or shattered edges.
5. Procedure
5.1 Oven-Dry Mass—Determine the mass of the portions, and dry in an oven at a temperature of 100 to 110110 6 5 °C for not
less than 24 h. After removing each specimen from the oven, allow it to cool in dry air (preferably in a desiccator) to a temperature
of 20 to 25 °C and determine the mass. If the specimen was comparatively dry when its mass was first determined, and the second
mass closely agrees with the first, consider it dry. If the specimen was wet when its mass was first determined, place it in the oven
for a second drying treatment of 24 h and again determine the mass. If the third value checks the second, consider the specimen
dry. In case of any doubt, redry the specimen for 24-h periods until check values of mass are obtained. If the difference between
values obtained from two successive values of mass exceeds 0.5 % of the lesser value, return the specimens to the oven for an
additional 24-h drying period, and repeat the procedure until the difference between any two successive values is less than 0.5 %
of the lowest value obtained. Designate this last value A.
5.2 Saturated Mass After Immersion—Immerse the specimen, after final drying, cooling, and determination of mass, in water
at approximately 21 °C for not less than 48 h and until two successive values of mass of the surface-dried sample at intervals of
24 h show an increase in mass of less than 0.5 % of the larger value. Surface-dry the specimen by removing surface moisture with
a towel, and determine the mass. Designate the final surface-dry mass after immersion B.
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This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregatesand is the direct responsibility of Subcommittee C09.66 on
Concrete’s Resistance to Fluid Penetration.
Current edition approved July 1, 2006Feb. 1, 2013. Published August 2006February 2013. Originally approved in 1969. Last previous edition approved in 19972006 as
C642 – 97.C642 – 06. DOI: 10.1520/C0642-06.10.1520/C0642-13.
*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
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C642 − 13
5.3 Saturated Mass After Boiling—Place the specimen, processed as described in 5.2, in a suitable receptacle, covered with tap
water, and boil for 5 h. Allow it to cool by natural loss of heat for not less than 14
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