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In the split-cylinder (indirect tension) test, the horizontal tensile stress along the vertical diameter is given by:
Answer & Solution
Correct answer: C.
1. A line load P is applied along the generatrix of a horizontally placed cylinder of length L and diameter D.
2. Theoretical analysis along the vertical diameter shows uniform horizontal tensile stress.
3. The value is sigma_t = 2P / (pi L D), as written in equation 9.2 of the unit.
4. Once the load P at splitting is known, the tensile strength is computed directly.
5. The other expressions misstate the factor 2/pi.
_Source: IGNOU ET-522 Concrete Technology, Block 2 Unit 9 "Testing of Concrete"._
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