ASTM C116-90
(Test Method)Test Method for Compressive Strength of Concrete Using Portions of Beams Broken in Flexure (Withdrawn 1999)
Test Method for Compressive Strength of Concrete Using Portions of Beams Broken in Flexure (Withdrawn 1999)
SCOPE
1.1 This test method covers determination of the compressive strength of concrete, using portions of beams broken in flexure for the test specimens. Note 1-This test method was originally developed to cover testing portions of beams having a square cross section as "modified cubes" and former versions of this procedure were subtitled "Modified Cube Method." This terminology no longer applies because beams of rectangular cross section may be tested as provided under 6.1. Note 2-For methods of making flexural test specimens from which the specimens for this method may be obtained, refer to Practice C31, Test Method C42, and Practice C192. Note 3-For methods of making the flexural strength test, refer to Test Method C78, and Test Method C293.
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 the safety problems 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
Standards Content (Sample)
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Designation: C 116 - 90 AMERICAN SOCIETY FOR TESTlN~ AND MATERIALS
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Standard Test Method for
Compressive Strength of concrete Using Portions of
Beams Broken in Flexure’
This standard is issued under the fixed designation C 116; 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 indicate-s the year of last reapproval. A
superscript epsilon (6) indicates an editorial change since the last revision or reapprowl.
1. Scope and as a research tool for determining relative compressive
strength values for various concrete mixtures. It is not
1.1 This test method covers determination of the com-
intended as an alternative for Test Method C 39, and the test
pressive strength of concrete, using portions of beams broken
values obtained by these two test methods are not inter-
in flexure for the test specimens.
changeable and not necessarily comparable.
NOTE l-This test method was originally developed to cover testing
portions of beams having a square cross section as “modified cubes” and
4. Apparatus
former versions of this procedure were subtitled “Modified Cube
Method.” This terminology no longer applies because beams of rcctan-
4.1 The testing machine may be of any type of sufficient
gular cross section may be tested as provided under 6.1,
capacity which will provide the rate of loading prescribed in
NOTE 2-For methods of making flexural test specimens from which
6.3. It shall conform to the requirements of the sections on
the specimens for this method may be obtained, refer to Practice C 3 1,
Basis of Verification, Corrections, and Time Interval Be-
Test Method C 42, and Practice C 192.
tween Verifications of Practices E 4. The testing machine
NOTE 3-For methods of making the flexural strength test, refer to
shall be equipped with two steel bearing blocks with hard-
Test Method C 78, and Test Method C 293.
ened faces (Note 4), one of which is a spherically seated block
1.2 The values stated in inch-pound units are to be
that will bear on the top bearing plate described in 4.2; and
regarded as the standard.
the other a plain rigid block that will support the bottom
1.3 This standard does not purport to address the safety
bearing plate described in 4.2. The diameter of the spherical
problems associated with its use. It is the responsibility of the
bearing block shall be at least 75 % of the width (B, Fig. 1) of
user of this standard to establish appropriate safety and
the specimen. The bearing faces shall not depart from a plane
health practices and determine the applicability of regulatory
by more than 0.00 1 in. (0.025 mm) in any 6 in. (152 mm) for
limitations prior to use.
a block 6 in. ( 152 mm) in diameter or larger, or by more than
0.001 in. in the diameter of any smaller block; new blocks
2. Referenced Documents
shall be manufactured within one half of this tolerance.
2.1 ASTM Standards:
NOTE 4-b is desirable that the bearing faces of blocks used for
C 31 Practice for Making and Curing Concrete Test
compression testing of concrete have a Rockwell hardness of not less
Specimens in the Field’
than HRC 60.
C 39 Test Method for Compressive Strength of Cylindrical
4.2 Machined or ground metal bearing plates not less than
Concrete Specimens’
3/4 in. (19 mm) in thickness, that meet the planeness
C 42 Test Method for Obtaining and Testing Drilled Cores
requirements for the bearing faces of specimens specified in
and Sawed Beams of Concrete*
5.2.1 and the hardness requirements for bearing blocks
C 78 Test Method for Flexural Strength of Concrete
specified in 4.1, shall be mounted on the bearing surfaces of
(Using Simple Beam with Third-Pdint Loading)*
the specimen. The bearing plates shall be of such dimensions
C 192 Practice for Making and Curing Concrete Test
that the contact faces shall be substantially square and shall
Specimens in the Laboratory’
have the same dimensions as the nominal width of the beam
C 293 Test Method for Flexural Strength of Concrete
tested. The upper bearing plate shall be placed directly over
(Using Simple Beam with Center-Point LoadingI
the lower plate. A drawing of a satisfactory device designed
C 617 Practice for Capping Cylindrical Concrete
to ensure the proper location of the upper plate with
Specimens’
reference to the lower plate is shown in Fig. 1. The bearing
E 4 Practices for Load Verification of Testing Machines*
faces shall not depart from a plane by more than 0.001 in.
(0.025 mm) in 6 in. (152 mm), and new bearing plates shall
3. Significance and Use
be manufactured within one half of this tolerance.
3.1
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