Information on the most widely used ASTM standards within the materials testing industry
Brazilian Test
Concrete Cylinder Splitting Tensile Strength Test or Brazilian Test is a laboratory test conducted in rock mechanics to indirectly determine the tensile strength of rocks.
Concrete
tensile strength is the ability of concrete to resist tensile force or
stress applied to it. The tensile strength of concrete is measured by
the split cylinder test of the concrete method. The tensile strength of
concrete is measured by the Units of Force per Cross-Sectional area
(N/Sq.mm. or Mpa).
So The tensile strength of rock materials is an
important parameter in designing a geotechnical project since it is
significantly lower than the rocks’ compressive strength. This
phenomenon is also presented in concrete, a fact that led to the
utilization of steel reinforcement to increase the tensile capacity of
the material.
Tensile strength of a rock is mainly derived by two testing procedures:
1, Direct Tensile Strength test
2, Brazilian Test
General introduction
For this reason, the Brazilian Test is widely used as the sample preparation and the testing procedure are far more efficient.

Testing Procedure
The sample is placed into the cell and masking tape (a 0.2-0.4mm adhesive paper) is wrapped around its surface. The system is then placed in the loading apparatus which must be capable of applying a constant loading rate so that the specimen fails within 15-30 seconds. The maximum load is recorded.
Typical loading devices designed for Brazilian Tests have a maximum loading capacity of 100kN. Nevertheless, loading devices utilized for Uniaxial Compression Tests can also be used as long as they are capable of applying the aforementioned rate.
The specimen must fail along its diameter so that the test is considered valid.

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