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ASTM C880 Flexural Strength of Dimension Stone

ASTM C880 Flexural Strength of Dimension Stone

Dimension stone used in the construction industry requires testing for flexural strength. As the Standard Test Method for Flexural Strength of Dimension Stone, ASTM C880 provides detail on the required test specimens and fixturing to determine the flexural strength.

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Dimension stone used in the construction industry requires testing for flexural strength. As the Standard Test Method for Flexural Strength of Dimension Stone, ASTM C880 provides detail on the required test specimens and fixturing to determine the flexural strength.

The requirements of ASTM C880 include the following machine specifications & specimen preparations:

Apparatus-Test machine capable of compressive loading as well as 4-point load fixturing. This fixture includes bearing support blocks to ensure vertical loading of the dimension stone specimens. The span length and distances between the load and support blocks must be constant within ± 0.05 inches
Test Specimens-Samples are to sawed and finished-ground to dimensions of 4" x 1.25" x 15". A fine abrasive finish on planes perpendicular to the load along with fine saw finish on all other planes are required. A minimum of five specimens shall be tested for each specific condition of test.;
Measuring specimens-Lower support span is to be 12.5" along with an upper support span set at 6.25".
Conditioning-The dimension stone can be tested in both dry and wet conditions
Dry specimens for 48 hours at 140 ± 4o Fahrenheit
Wet specimens must be immersed in water for 48 hours at 72 ± 4o Fahrenheit

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