Table 6.

Summary of test results.

Testing Methods	ID	Test Tensile Strength (MPa)	$\mathbf{Coefficient} \mathbf{of} \sqrt{{\mathit{f}}_{\mathit{c}}^{\prime }}$	Average Coefficient
Direct tension test	C30	1.94	0.34	0.34
	C40	2.10	0.33
	C60	2.55	0.34
Splitting test	C30	2.57	0.43	0.48
	C40	2.86	0.46
	C60	4.11	0.53
Flexural test	C30	3.37	0.57	0.58
	C40	3.67	0.59
	C60	4.66	0.59
Strut-and-tie method	C30	1.83	0.37	0.37
	C40	2.16	0.36
	C60	2.78	0.38