ASTM C512/C512M-15
(Test Method)Standard Test Method for Creep of Concrete in Compression
Standard Test Method for Creep of Concrete in Compression
SIGNIFICANCE AND USE
4.1 This test method measures the load-induced time-dependent compressive strain at selected ages for concrete under an arbitrary set of controlled environmental conditions.
4.2 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 environmental parameters are presented in ACI SP-135, Symposium on Creep and Shrinkage of Concrete: Effect of Materials and Environment.3
4.3 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.
4.3.1 Creep is proportional to stress from 0 to 40 % of concrete compressive strength.
4.3.2 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 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.
4.4 The use of the logarithmic expression (Section 9) 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...
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.
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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: C512/C512M − 15
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 3. Terminology
3.1 For definitions of terms used in this test method refer to
1.1 This test method covers the determination of the creep
Terminology C125.
of molded concrete cylinders subjected to sustained longitudi-
nal compressive load.This test method is limited to concrete in
4. Significance and Use
which the maximum aggregate size does not exceed 50 mm [2
in.]. 4.1 This test method measures the load-induced time-
dependent compressive strain at selected ages for concrete
1.2 The values stated in either SI units or inch-pound units
under an arbitrary set of controlled environmental conditions.
are to be regarded separately as standard. The values stated in
4.2 This test method can be used to compare creep poten-
each system may not be exact equivalents; therefore, each
tials of different concretes. A procedure is available, using the
system shall be used independently of the other. Combining
developed equation (or graphical plot), for calculating stress
values from the two systems may result in non-conformance
from strain data within massive non-reinforced concrete struc-
with the standard.
tures. For most specific design applications, the test conditions
1.3 This standard does not purport to address all of the
set forth herein must be modified to more closely simulate the
safety concerns, if any, associated with its use. It is the
anticipated curing, thermal, exposure, and loading age condi-
responsibility of the user of this standard to establish appro- tions for the prototype structure. Current theories and effects of
priate safety and health practices and determine the applica- material and environmental parameters are presented in ACI
SP-135, Symposium on Creep and Shrinkage of Concrete:
bility of regulatory limitations prior to use.
3
Effect of Materials and Environment.
2. Referenced Documents
4.3 In the absence of a satisfactory hypothesis governing
2
creep phenomena, a number of assumptions have been devel-
2.1 ASTM Standards:
oped that have been generally substantiated by test and
C39/C39M Test Method for Compressive Strength of Cylin-
experience.
drical Concrete Specimens
4.3.1 Creep is proportional to stress from 0 to 40 % of
C125 Terminology Relating to Concrete and Concrete Ag-
concrete compressive strength.
gregates
4.3.2 Creep has been conclusively shown to be directly
C192/C192M Practice for Making and Curing Concrete Test
proportional to paste content throughout the range of paste
Specimens in the Laboratory
contents normally used in concrete. Thus, the creep character-
C470/C470M Specification for Molds for Forming Concrete
istics of concrete mixtures containing aggregate of maximum
Test Cylinders Vertically
size greater than 50 mm [2 in.] may be determined from the
C617 Practice for Capping Cylindrical Concrete Specimens
creepcharacteristicsoftheminus50-mm[minus2-in.]fraction
C670 Practice for Preparing Precision and Bias Statements
obtained by wet-sieving. Multiply the value of the character-
for Test Methods for Construction Materials
istic by the ratio of the cement paste content (proportion by
volume) in the full concrete mixture to the paste content of the
sieved sample.
1
This test method is under the jurisdiction of ASTM Committee C09 on
4.4 The use of the logarithmic expression (Section 9) does
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
not imply that the creep strain-time relationship is necessarily
C09.61 on Testing for Strength.
Current edition approved Oct. 1, 2015. Published December 2015. Originally
an exact logarithmic function; however, for the period of one
approved in 1963. Last previous edition approved in 2010 as C512/C512M–10.
DOI: 10.1520/C0512_C0512M-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM SP-135 is currently out of print, however, the individual papers contained in the
Standards volume information, refer to the standard’s Document Summary page on publication are available from American Concrete Institute (ACI), P.O. Box 9094,
the ASTM website. Farmington Hills, MI 48333-9094, http://www.concrete.org.
Copyright © ASTM International, 100 Barr Harb
...
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/C512M − 10 C512/C512M − 15
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
1.1 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
C125 Terminology Relating to Concrete and Concrete Aggregates
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. Terminology
3.1 For definitions of terms used in this test method refer to Terminology C125.
4. Significance and Use
4.1 This test method measures the load-induced time-dependent compressive strain at selected ages for concrete under an
arbitrary set of controlled environmental conditions.
4.2 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
environmental parameters are presented in ACI SP-9,SP-135, Symposium on Creep of Concrete.and Shrinkage of Concrete: Effect
3
of Materials and Environment.
4.3 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.
4.3.1 Creep is proportional to stress from 0 to 40 % of concrete compressive strength.
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 Dec. 1, 2010Oct. 1, 2015. Published January 2011December 2015. Originally approved in 1963. Last previous edition approved in 20022010
as C512C512/C512M–02.–10. DOI: 10.1520/C0512_C0512M-10.10.1520/C0512_C0512M-15.
2
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.
3
Available SP-135 is currently out of print, however, the individual papers contained in the publication are available from American Concrete Institute (ACI), P.O. Box
9094, Farmington Hills, MI 48333-9094, http://www.concrete.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C512/C512M − 15
4.3.2 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
50 mm [2 in.] may be determined from the creep characteristics of the minus 50-mm [minus 2-in.] fraction obtained by wet-sieving.
Mult
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