ASTM C512/C512M-10

Standard Test Method for Creep of Concrete in Compression

SIGNIFICANCE AND USE
This test method measures the load-induced time-dependent compressive strain at selected ages for concrete under an arbitrary set of controlled environmental conditions.
This test method can be used to compare creep potentials of different concretes. A procedure is available, using the developed equation (or graphical plot), for calculating stress from strain data within massive non-reinforced concrete structures. For most specific design applications, the test conditions set forth herein must be modified to more closely simulate the anticipated curing, thermal, exposure, and loading age conditions for the prototype structure. Current theories and effects of material and environmental parameters are presented in ACI SP-9, Symposium on Creep of Concrete.  
In the absence of a satisfactory hypothesis governing creep phenomena, a number of assumptions have been developed that have been generally substantiated by test and experience.
Creep is proportional to stress from 0 to 40 % of concrete compressive strength.
Creep has been conclusively shown to be directly proportional to paste content throughout the range of paste contents normally used in concrete. Thus, the creep characteristics of concrete mixtures containing aggregate of maximum size greater than 50 mm [2 in.] may be determined from the creep characteristics of the minus 50-mm [minus 2-in.] fraction obtained by wet-sieving. Multiply the value of the characteristic by the ratio of the cement paste content (proportion by volume) in the full concrete mixture to the paste content of the sieved sample.
The use of the logarithmic expression (Section 8) does not imply that the creep strain-time relationship is necessarily an exact logarithmic function; however, for the period of one year, the expression approximates normal creep behavior with sufficient accuracy to make possible the calculation of parameters that are useful for the purpose of comparing concretes.
There are no data that would support the ex...
SCOPE
1.1 This test method covers the determination of the creep of molded concrete cylinders subjected to sustained longitudinal compressive load. This test method is limited to concrete in which the maximum aggregate size does not exceed 50 mm [2 in.].
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 with the standard.
1.3 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: 30-Nov-2010
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.61 - Testing for Strength

Relations

• Replaces: ASTM C512-02 - Standard Test Method for Creep of Concrete in Compression
• Effective Date: 01-Dec-2010
• Replaced By: ASTM C512/C512M-15 - Standard Test Method for Creep of Concrete in Compression
• Effective Date: 01-Oct-2015
• Referred By: ASTM C1856/C1856M-17 - Standard Practice for Fabricating and Testing Specimens of Ultra-High Performance Concrete
• Effective Date: 01-Dec-2010

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: C512/C512M − 10
StandardTest Method for
1
Creep of Concrete in Compression
This standard is issued under the fixed designation C512/C512M; 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 3.2 This test method can be used to compare creep poten-
tials of different concretes. A procedure is available, using the
1.1 This test method covers the determination of the creep
developed equation (or graphical plot), for calculating stress
of molded concrete cylinders subjected to sustained longitudi-
from strain data within massive non-reinforced concrete struc-
nal compressive load.This test method is limited to concrete in
tures. For most specific design applications, the test conditions
which the maximum aggregate size does not exceed 50 mm [2
set forth herein must be modified to more closely simulate the
in.].
anticipated curing, thermal, exposure, and loading age condi-
1.2 The values stated in either SI units or inch-pound units
tions for the prototype structure. Current theories and effects of
are to be regarded separately as standard. The values stated in
material and environmental parameters are presented in ACI
3
each system may not be exact equivalents; therefore, each
SP-9, Symposium on Creep of Concrete.
system shall be used independently of the other. Combining
3.3 In the absence of a satisfactory hypothesis governing
values from the two systems may result in non-conformance
creep phenomena, a number of assumptions have been devel-
with the standard.
oped that have been generally substantiated by test and
1.3 This standard does not purport to address all of the
experience.
safety concerns, if any, associated with its use. It is the
3.3.1 Creep is proportional to stress from 0 to 40 % of
responsibility of the user of this standard to establish appro-
concrete compressive strength.
priate safety and health practices and determine the applica-
3.3.2 Creep has been conclusively shown to be directly
bility of regulatory limitations prior to use.
proportional to paste content throughout the range of paste
contents normally used in concrete. Thus, the creep character-
2. Referenced Documents
istics of concrete mixtures containing aggregate of maximum
2
2.1 ASTM Standards:
size greater than 50 mm [2 in.] may be determined from the
C39/C39M Test Method for Compressive Strength of Cylin-
creepcharacteristicsoftheminus50-mm[minus2-in.]fraction
drical Concrete Specimens
obtained by wet-sieving. Multiply the value of the character-
C192/C192M Practice for Making and Curing Concrete Test
istic by the ratio of the cement paste content (proportion by
Specimens in the Laboratory
volume) in the full concrete mixture to the paste content of the
C470/C470M Specification for Molds for Forming Concrete
sieved sample.
Test Cylinders Vertically
3.4 The use of the logarithmic expression (Section 8) does
C617 Practice for Capping Cylindrical Concrete Specimens
not imply that the creep strain-time relationship is necessarily
C670 Practice for Preparing Precision and Bias Statements
an exact logarithmic function; however, for the period of one
for Test Methods for Construction Materials
year, the expression approximates normal creep behavior with
3. Significance and Use sufficient accuracy to make possible the calculation of param-
eters that are useful for the purpose of comparing concretes.
3.1 This test method measures the load-induced time-
dependent compressive strain at selected ages for concrete 3.5 There are no data that would support the extrapolation
under an arbitrary set of controlled environmental conditions.
of the results of this test to tension or torsion.
4. Apparatus
1
This test method is under the jurisdiction of ASTM Committee C09 on
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
4.1 Molds—Molds shall be cylindrical conforming to the
C09.61 on Testing for Strength.
provisions of Practice C192/C192M, or to the provisions of
Current edition approved Dec. 1, 2010. Published January 2011. Originally
approved in 1963. Last previous edition approved in 2002 as C512–02. DOI: Specification C470/C470M. If required, provisions shall be
10.1520/C0512_C0512M-10.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican Concrete Institute (ACI), P.O. Box 9094, Farmington
the ASTM website. Hills, MI 48333-9094, http://www.concrete.org.
Copyright © ASTM International, 100 Barr
...

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:C512–02 Designation: C512/C512M – 10
Standard Test Method for
1
Creep of Concrete in Compression
This standard is issued under the fixed designation C512/C512M; 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
1.1This test method covers the determination of the creep of molded concrete cylinders subjected to sustained longitudinal
compressive load. This test method is limited to concrete in which the maximum aggregate size does not exceed 2 in. (50 mm).
1.2The values stated in inch-pound units are to be regarded as the standard.
1.1 This test method covers the determination of the creep of molded concrete cylinders subjected to sustained longitudinal
compressive load. This test method is limited to concrete in which the maximum aggregate size does not exceed 50 mm [2 in.].
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 with the standard.
1.3 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:
C39/C39M Test Method for Compressive Strength of Cylindrical Concrete Specimens
C192/C192M Practice for Making and Curing Concrete Test Specimens in the Laboratory
C470/C470M Specification for Molds for Forming Concrete Test Cylinders Vertically
C617 Practice for Capping Cylindrical Concrete Specimens
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
3. Significance and Use
3.1 This test method measures the load-induced time-dependent compressive strain at selected ages for concrete under an
arbitrary set of controlled environmental conditions.
3.2 This test method can be used to compare creep potentials of different concretes. A procedure is available, using the
developed equation (or graphical plot), for calculating stress from strain data within massive non-reinforced concrete structures.
For most specific design applications, the test conditions set forth herein must be modified to more closely simulate the anticipated
curing, thermal, exposure, and loading age conditions for the prototype structure. Current theories and effects of material and
3
environmental parameters are presented in ACI SP-9, Symposium on Creep of Concrete.
3.3 In the absence of a satisfactory hypothesis governing creep phenomena, a number of assumptions have been developed that
have been generally substantiated by test and experience.
3.3.1 Creep is proportional to stress from 0 to 40 % of concrete compressive strength.
3.3.2 Creep has been conclusively shown to be directly proportional to paste content throughout the range of paste contents
normally used in concrete.Thus, the creep characteristics of concrete mixtures containing aggregate of maximum size greater than
2 in. (50 mm)50 mm [2 in.] may be determined from the creep characteristics of the minus 2-in. (minus 50-mm)50-mm [minus
2-in.] fraction obtained by wet-sieving. Multiply the value of the characteristic by the ratio of the cement paste content (proportion
by volume) in the full concrete mixture to the paste content of the sieved sample.
3.4 The use of the logarithmic expression (Section 8) does not imply that the creep strain-time relationship is necessarily an
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.61 on
Testing for Strength.
Current edition approved Aug. 10, 2002. Published October 2002. Originally published as C512–63T. Last previous edition C512–87 (1994). DOI: 10.1520/C0512-02.
Current edition approved Dec. 1, 2010. Published January 2011. Originally approved in 1963. Last previous edition approved in 2002 as C512–02. DOI:
10.1520/C0512_C0512M-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book ofASTM S
...