Table 8.

Comparison of K_IC from this study with data from the literature for ordinary plain concrete of strength grade from 30 to 60 MPa. Only fracture toughness on SENB specimens under three-point bending was compared.

Reference	fcu (MPa)	Water/Cement Ratio	dmax (mm)	Dimension L × H × B (mm)	S/H	Number of Datapoints	α0	${\mathit{K}}_{\mathbf{IC}}^{\mathit{i}\mathit{n}\mathit{i}}$ ($\mathbf{M}\mathbf{P}\mathbf{a}·\sqrt{\mathbf{m}}$)	${\mathit{K}}_{\mathbf{IC}}^{\mathit{u}\mathit{n}}$ or ${\mathit{K}}_{\mathbf{IC}}$ ($\mathbf{M}\mathbf{P}\mathbf{a}·\sqrt{\mathbf{m}}$)	Analytical Method
[29]	30.4	0.52	N.A. *	550 × 200 × 100	2.5	13	0.20~0.50	N.A. *	2.37	DKFM
[31]	44.9	0.52	10	550 × 200 × 100	2.5	15	0.20~0.50	1.03	2.07	DKFM
[8]	51.2	0.27	20	650 × 150 × 150	4.0	18	0.40~0.55	N.A. *	1.08	N.A. *
Current study	65.4	0.46	25	600 × 200 × 100	2.5	20 or 26	0.10~0.50	0.78 N.A. *	1.94 2.11	DKFM BEM

* Not reported in the literature.