Table 1.

Approximate range of concrete tensile strength obtained by different methods [6].

Testing Methods	Range of Tensile Strength (MPa)
Direct tension test	$(0.25\sqrt{f_c^{\prime }}~0.41\sqrt{f_c^{\prime }})$
Splitting tensile test	$\left(0.5\sqrt{f_c^{\prime }}~0.66\sqrt{f_c^{\prime }}\right)$
Flexural test	$\left(0.66\sqrt{f_c^{\prime }}~1.0\sqrt{f_c^{\prime }}\right)$