ASTM C349-02

Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure)

SIGNIFICANCE AND USE
This method provides a means of obtaining compressive strength values from the same specimens previously used for flexural strength determinations by Test Method C 348. The compressive strength values are for reference purposes, and not as substitutes for values (using 50-mm (2-in.) cubes) obtained by Test Method C 109/C 109M for cement acceptance.3
SCOPE
1.1 This test method covers the determination of the compressive strength of hydraulic-cement mortars, using for the test specimens portions of prisms made and broken in flexure in accordance with Test Method C 348.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
1.3 Values in SI units shall be obtained by measurement in SI units or by appropriate conversion, using the Rules for Conversion and rounding given in Standard IEEE/ASTM SI 10, of measurements made in other units.
1.4 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. (Warning— Fresh hydraulic cementitious mixtures are caustic and may cause chemical burns to skin and tissue upon prolonged exposure.)

General Information

• Status: Historical
• Publication Date: 09-Jun-2002
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C01 - Cement
• Drafting Committee: C01.27 - Strength

Relations

• Replaces: ASTM C349-97 - Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure)
• Effective Date: 10-Jun-2002
• Replaced By: ASTM C349-08 - Standard Test Method for Compressive Strength of Hydraulic-Cement Mortars (Using Portions of Prisms Broken in Flexure)
• Effective Date: 01-Dec-2008
• Referred By: ASTM C1012/C1012M-18b - Standard Test Method for Length Change of Hydraulic-Cement Mortars Exposed to a Sulfate Solution
• Effective Date: 10-Jun-2002
• Referred By: ASTM C348-21 - Standard Test Method for Flexural Strength of Hydraulic-Cement Mortars
• Effective Date: 10-Jun-2002
• Referred By: ASTM C887-20 - Standard Specification for Packaged, Dry, Combined Materials for Surface Bonding Mortar
• Effective Date: 10-Jun-2002
• Referred By: ASTM C109/C109M-21 - Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens)
• Effective Date: 10-Jun-2002

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: C 349 – 02
Standard Test Method for
Compressive Strength of Hydraulic-Cement Mortars
1
(Using Portions of Prisms Broken in Flexure)
This standard is issued under the fixed designation C 349; 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 flexural strength determinations by Test Method C 348. The
compressivestrengthvaluesareforreferencepurposes,andnot
1.1 This test method covers the determination of the com-
as substitutes for values (using 50-mm (2-in.) cubes) obtained
pressive strength of hydraulic-cement mortars, using for the
3
by Test Method C 109/C 109M for cement acceptance.
test specimens portions of prisms made and broken in flexure
in accordance with Test Method C 348.
4. Apparatus
1.2 The values stated in SI units are to be regarded as the
4.1 Bearing Plates—The bearing plates shall be not less
standard. The values in parentheses are for information only.
than25mminthicknessandshallbemadeofahardmetal.The
1.3 Values in SI units shall be obtained by measurement in
surfacesofthebearingplatesthatareplacedincontactwiththe
SI units or by appropriate conversion, using the Rules for
specimens shall be 40.0 6 0.1-mm by 50.8-mm rectangles,
Conversion and rounding given in Standard IEEE/ASTM SI
with the 50.8-mm dimension at right angles to the longitudinal
10, of measurements made in other units.
axis of the prism.The bearing plate surfaces in contact with the
1.4 This standard does not purport to address all of the
specimen shall have a Rockwell hardness of not less than 60
safety concerns, if any, associated with its use. It is the
HRC. These surfaces shall not depart from plane surfaces by
responsibility of the user of this standard to establish appro-
more than 0.01 mm when the plates are new and shall be
priate safety and health practices and determine the applica-
maintained within a permissible variation of 0.03 mm.
bility of regulatory limitations prior to use. (Warning—Fresh
4.2 Device for Aligning Bearing Plates—A device for
hydraulic cementitious mixtures are caustic and may cause
2
aligning the bearing plates to ensure the proper location of the
chemical burns to skin and tissue upon prolonged exposure. )
upper plate with reference to the lower plate is shown in Fig.
2. Referenced Documents 1. If the upper bearing plate does not have free movement
within the aligning plates, these shall be separated from the
2.1 ASTM Standards:
bottom plate by insertion of 0.05-mm shims on each side of the
C 109/C 109M Test Method for Compressive Strength of
bottom bearing plate, and the two 6-mm pins in the upper
Hydraulic Cement Mortars (Using 2-in. or 50-mm Cube
3 bearing plate filed down just sufficiently to permit free up and
Specimens)
down movement in the slots at the top of the aligning plates.
C 348 Test Method for Flexural Strength of Hydraulic
3 4.3 Testing Machine—The testing machine shall conform to
Cement Mortars
the requirements prescribed in Test Method C 109/C 109M,
C 670 Practice for Preparing Precision and Bias Statements
4 except that the testing machine shall be of the hydraulic type.
for Test Methods for Construction Materials
IEEE/ASTM SI 10 Standard for Use of the International
5. Test Specimens
5
System of Units (SI): The Modern Metric System
5.1 Bothportionsfromeachprismbrokeninflexureshallbe
3. Significance and Use usedforcompressiontesting,exceptthatthebrokenportionsof
prisms selected for the compression test shall have a length of
3.1 This method provides a means of obtaining compressive
not less than 65 mm and shall be free of cracks, chipped
strength values from the same specimens previously used for
surfaces, or other obvious defects.
1
This test method is under the jurisdiction ofASTM Committee C01 on Cement 6. Procedure
and is the direct responsibility of Subcommittee C01.27 on Strength.
6.1 Determination of Compressive Strength—During the
Current edition approved June 10, 2002. Published August 2002. Originally
interval between flexure tests of the prisms and testing the
published as C 349 – 54 T. Last previous edition C 349 – 97.
2
See the section on Safety, Manual of Cement Testing, Annual Book of ASTM
broken portions as modified cubes, cover the specimens for the
Standards, Vol 04.01.
24-h test with waterproof plastic and completely immerse all
3
Annual Book of ASTM Standards, Vol 04.01.
4 other specimens in water at a temperature of 23 6 2.0°C (73 6
Annual Book of ASTM Standards, Vol 04.02.
5
3°F) until the time of testing. Wipe the specimen to a
Annual Book of ASTM Standards, Vol 14.04.
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