ASTM C215-19
(Test Method)Standard Test Method for Fundamental Transverse, Longitudinal, and Torsional Resonant Frequencies of Concrete Specimens
Standard Test Method for Fundamental Transverse, Longitudinal, and<brk/> Torsional Resonant Frequencies of Concrete Specimens
SIGNIFICANCE AND USE
5.1 This test method is intended primarily for detecting changes in the dynamic modulus of elasticity of laboratory or field test specimens that are undergoing exposure to weathering or other types of potentially deteriorating influences. The test method may also be used to monitor the development of dynamic elastic modulus with increasing maturity of test specimens.
5.2 The value of the dynamic modulus of elasticity obtained by this test method will, in general, be greater than the static modulus of elasticity obtained by using Test Method C469/C469M. The difference depends, in part, on the strength level of the concrete.
5.3 The conditions of manufacture, the moisture content, and other characteristics of the test specimens (see section on Test Specimens) influence the results obtained.
5.4 Different computed values for the dynamic modulus of elasticity may result from different modes of vibration and from specimens of different sizes and shapes of the same concrete. Therefore, it is not advisable to compare results from different modes of vibration or from specimens of different sizes or shapes.
SCOPE
1.1 This test method covers measurement of the fundamental transverse, longitudinal, and torsional resonant frequencies of concrete prisms and cylinders for the purpose of calculating dynamic Young's modulus of elasticity, the dynamic modulus of rigidity (sometimes designated as “the modulus of elasticity in shear”), and dynamic Poisson's ratio.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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.
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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: C215 − 19
Standard Test Method for
Fundamental Transverse, Longitudinal, and
1
Torsional Resonant Frequencies of Concrete Specimens
This standard is issued under the fixed designation C215; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* C192/C192M Practice for Making and Curing Concrete Test
Specimens in the Laboratory
1.1 This test method covers measurement of the fundamen-
C469/C469M Test Method for Static Modulus of Elasticity
tal transverse, longitudinal, and torsional resonant frequencies
and Poisson’s Ratio of Concrete in Compression
of concrete prisms and cylinders for the purpose of calculating
C670 Practice for Preparing Precision and Bias Statements
dynamic Young’s modulus of elasticity, the dynamic modulus
for Test Methods for Construction Materials
of rigidity (sometimes designated as “the modulus of elasticity
E1316 Terminology for Nondestructive Examinations
in shear”), and dynamic Poisson’s ratio.
1.2 The values stated in SI units are to be regarded as 3. Terminology
standard. No other units of measurement are included in this
3.1 Definitions—Refer toTerminology C125 and the section
standard.
related to ultrasonic examination in Terminology E1316 for
1.3 This standard does not purport to address all of the definitions of terms used in this test method.
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- 4.1 The fundamental resonant frequencies are determined
mine the applicability of regulatory limitations prior to use. using one of two alternative procedures: (1) the forced reso-
1.4 This international standard was developed in accor- nance method or (2) the impact resonance method. Regardless
dance with internationally recognized principles on standard- of which testing procedure is selected, the same procedure is to
ization established in the Decision on Principles for the be used for all specimens of an associated series.
Development of International Standards, Guides and Recom-
4.2 Intheforcedresonancemethod,asupportedspecimenis
mendations issued by the World Trade Organization Technical
forced to vibrate by an electro-mechanical driving unit. The
Barriers to Trade (TBT) Committee.
specimen response is monitored by a lightweight pickup unit
on the specimen. The driving frequency is varied until the
2. Referenced Documents
measured specimen response reaches maximum amplitude.
2
2.1 ASTM Standards: The value of the frequency causing maximum response is a
C31/C31M Practice for Making and Curing Concrete Test resonant frequency of the specimen. The fundamental frequen-
Specimens in the Field cies for the three different modes of vibration are obtained by
C42/C42M Test Method for Obtaining and Testing Drilled proper location of the driver and the pickup unit.
Cores and Sawed Beams of Concrete
4.3 In the impact resonance method, a supported specimen
C125 Terminology Relating to Concrete and Concrete Ag-
is struck with a small impactor and the specimen response is
gregates
measured by a lightweight accelerometer on the specimen.The
output of the accelerometer is recorded. The fundamental
frequency of vibration is determined by computing the ampli-
1
This test method is under the jurisdiction of ASTM Committee C09 on
tude spectrum of the recorded waveform or counting zero
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
crossings in the recorded waveform.The fundamental frequen-
C09.64 on Nondestructive and In-Place Testing.
cies for the three different modes of vibration are obtained by
Current edition approved Dec. 1, 2019. Published January 2020. Originally
approved in 1947. Last previous edition approved in 2014 as C215 – 14. DOI: proper location of the impact point and the accelerometer.
10.1520/C0215-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 5. Significance and Use
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 This test method is intended primarily for detecting
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. changes in the dynamic modulus of elasticity of laboratory or
*A Summary of Changes section appears at the en
...
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: C215 − 14 C215 − 19
Standard Test Method for
Fundamental Transverse, Longitudinal, and
1
Torsional Resonant Frequencies of Concrete Specimens
This standard is issued under the fixed designation C215; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This test method covers measurement of the fundamental transverse, longitudinal, and torsional resonant frequencies of
concrete prisms and cylinders for the purpose of calculating dynamic Young’s modulus of elasticity, the dynamic modulus of
rigidity (sometimes designated as “the modulus of elasticity in shear”), and dynamic Poisson’s ratio.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 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
2.1 ASTM Standards:
C31/C31M Practice for Making and Curing Concrete Test Specimens in the Field
C42/C42M Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
C125 Terminology Relating to Concrete and Concrete Aggregates
C192/C192M Practice for Making and Curing Concrete Test Specimens in the Laboratory
C469/C469M Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
E1316 Terminology for Nondestructive Examinations
3. Terminology
3.1 Definitions—Refer to Terminology C125 and the section related to ultrasonic examination in Terminology E1316 for
definitions of terms used in this test method.
4. Summary of Test Method
4.1 The fundamental resonant frequencies are determined using one of two alternative procedures: (1) the forced resonance
method or (2) the impact resonance method. Regardless of which testing procedure is selected, the same procedure is to be used
for all specimens of an associated series.
4.2 In the forced resonance method, a supported specimen is forced to vibrate by an electro-mechanical driving unit. The
specimen response is monitored by a lightweight pickup unit on the specimen. The driving frequency is varied until the measured
specimen response reaches a maximum amplitude. The value of the frequency causing maximum response is thea resonant
frequency of the specimen. The fundamental frequencies for the three different modes of vibration are obtained by proper location
of the driver and the pickup unit.
1
This test method is under the jurisdiction of ASTM Committee C09 on Concrete and Concrete Aggregates and is the direct responsibility of Subcommittee C09.64 on
Nondestructive and In-Place Testing.
Current edition approved Dec. 15, 2014Dec. 1, 2019. Published January 2015January 2020. Originally approved in 1947. Last previous edition approved in 20082014 as
C215 – 08.C215 – 14. DOI: 10.1520/C0215-14.10.1520/C0215-19.
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.
*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
1
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C215 − 19
4.3 In the impact resonance method, a supported specimen is struck with a small impactor and the specimen response is
measured by a lightweight accelerometer on the specimen. The output of the accelerometer is recorded. The fundamental frequency
of vibration is determined b
...
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