ASTM C469-94
(Test Method)Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression
Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression
SCOPE
1.1 This test method covers determination of (1) chord modulus of elasticity (Young's) and ( ) Poisson's ratio of molded concrete cylinders and diamond-drilled concrete cores when under longitudinal compressive stress. Chord modulus of elasticity and Poisson's ratio are defined in Terminology E6.
1.2 The values stated in inch-pound units are to be regarded as 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
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Standards Content (Sample)
Designation: C 469 – 94
Standard Test Method for
Static Modulus of Elasticity and Poisson’s Ratio of Concrete
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in Compression
This standard is issued under the fixed designation C 469; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Significance and Use
1.1 This test method covers determination of (1) chord 3.1 This test method provides a stress to strain ratio value
modulus of elasticity (Young’s) and (2) Poisson’s ratio of and a ratio of lateral to longitudinal strain for hardened
molded concrete cylinders and diamond-drilled concrete cores concrete at whatever age and curing conditions may be
when under longitudinal compressive stress. Chord modulus of designated.
elasticity and Poisson’s ratio are defined in Terminology E 6. 3.2 The modulus of elasticity and Poisson’s ratio values,
1.2 The values stated in inch-pound units are to be regarded applicable within the customary working stress range (0 to
as the standard. 40 % of ultimate concrete strength), may be used in sizing of
1.3 This standard does not purport to address all of the reinforced and nonreinforced structural members, establishing
safety concerns, if any, associated with its use. It is the the quantity of reinforcement, and computing stress for ob-
responsibility of the user of this standard to establish appro- served strains.
priate safety and health practices and determine the applica- 3.3 The modulus of elasticity values obtained will usually
bility of regulatory limitations prior to use. be less than moduli derived under rapid load application
(dynamic or seismic rates, for example), and will usually be
2. Referenced Documents
greater than values under slow load application or extended
2.1 ASTM Standards: load duration, other test conditions being the same.
C 31 Practice for Making and Curing Concrete Test Speci-
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4. Apparatus
mens in the Field
C 39 Test Method for Compressive Strength of Cylindrical 4.1 Testing Machine—Any type of testing machine capable
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Concrete Specimens of imposing a load at the rate and of the magnitude prescribed
C 42 Test Method for Obtaining and Testing Drilled Cores in 6.4 may be used. The machine shall conform to the
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and Sawed Beams of Concrete requirements of Practices E 4 (Constant-Rate of-Traverse CRT-
C 174 Test Method for Measuring Length of Drilled Con- Type Testing Machines section). The spherical head and
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crete Cores bearing blocks shall conform to the Apparatus Section of Test
C 192 Practice for Making and Curing Concrete Test Speci- Method C 39.
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mens in the Laboratory 4.2 Compressometer —For determining the modulus of
C 617 Practice for Capping Cylindrical Concrete Speci- elasticity a bonded (Note 1) or unbonded sensing device shall
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mens be provided for measuring to the nearest 5 millionths the
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E 4 Practices for Load Verification of Testing Machines average deformation of two diametrically opposite gage lines,
E 6 Terminology Relating to Methods of Mechanical Test- each parallel to the axis, and each centered about midheight of
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ing the specimen. The effective length of each gage line shall be
E 83 Practice for Verification and Classification of Exten- not less than three times the maximum size of the aggregate in
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someters the concrete nor more than two thirds the height of the
E 177 Practice for Use of the Terms Precision and Bias in specimen; the preferred length of the gage line is one half the
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ASTM Test Methods height of the specimen. Gage points may be embedded in or
cemented to the specimen, and deformation of the two lines
read independently; or a compressometer (such as is shown in
Fig. 1) may be used consisting of two yokes, one of which (see
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This test method is under the jurisdiction of ASTM Committee C-9 on Concrete
B, Fig. 1) is rigidly attached to the specimen and the other (see
and Concrete Aggregates and is the direct responsibility of Subcommittee C09.70 on
C, Fig. 1) attached at two diametrically opposite points so that
Elastic and Inelastic.
Current edition approved March 15, 1994. Published July 1994. Originally
published as C469 – 61. Last previous edition C469 – 87a.
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Annual Book of ASTM Standards, Vol 04.02.
Copies of working drawings of strain measuring apparatus are available from
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Annual Book of ASTM Standards, Vol 03.01.
the American Society for Testing and Materials, 100 Barr Harbor Drive, West
Conshohocken, PA 19428. Request adjunct No. 12-304690-00.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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C 469
d 5 displacement due to specimen deformation
r 5 displacement due to rotation of the yoke about the pivot rod
a 5 location of gage
b 5 support point of the rotating yoke
c 5 location of piv
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