Question

A splitting tensile test is performed on cylinder of diameter D and length L. If the ultimate load is P, then splitting tensile strength of concrete is given by

• A. $\frac{P}{\pi DL}$
• B. $\frac{2P}{\pi DL}$
• C. $\frac{4PL}{\pi D^3}$
• D. $\frac{4PD}{\pi L^3}$

Answer 1

The correct option is B $\frac{2P}{\pi DL}$

Split tensile strength in the case of cylinder is obtained by ${\sigma }_{sp}=\frac{2P}{\pi DL}$
The test can also be performed on cubes by either
(i) along its middle parallel to the edges by applying two opposite compressive force through 15 mm square bars of sufficient length ${\sigma }_{sp}=0.642P/S^2$ OR
(ii) along one of the diagonal planes by applying compressive forces along two opposite edges ${\sigma }_{sp}=0.518P/S^2$
where
$P\to Loadatfailure$
$S\to Sideofthecube$
$L\to Lengthofcylinder$
$D\to Diameterofcylinder$