The ASTM C496/C496M-11 standard developed by the American Society for Testing and Materials (ASTM) describes a test method for determining the split tensile strength of cylindrical concrete specimens such as molded cylinders and drilled cores.
The split tensile strength test is a test method for determining the tensile strength of concrete using a split cylinder along the vertical diameter. It is an indirect method of testing the tensile strength of concrete.
Tensile strength is one of the fundamental and important properties of concrete. For the design of concrete structural elements, its value must be known. It is difficult to determine the direct tensile strength of concrete. Generally, the flexural strength or the divided tensile strength is determined and the stress is calculated directly.
The split tensile test is applied to determine the tensile strength of hardened concrete. Marginal changes in the water/cement ratio, component ratio, increase in slump, and similar factors affect the desired concrete strength. This, in turn, affects the strength and stability of structures.
Quality tests are carried out on concrete and structures at various stages from the production stage to the hardening stage. These tests play an important role in ensuring the quality of construction.
Because concrete is brittle, it is weak in tensile and can cause cracks. Therefore, it is essential to test the tensile strength of concrete. The method of determining the tensile strength of concrete using a cylinder splitting along the vertical diameter is an indirect method of testing the tensile strength of concrete. At least three samples should be tested and an average value calculated. The main objectives of this test are:
During testing, a diametrical compressive load is applied at a constant rate along the length of the sample until failure occurs. This loading induces tensile stresses in the plane containing the applied load, causing tensile fracture of the sample. The divided tensile strength is determined by dividing the maximum applied load by the appropriate geometric factors.
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