Reinforcing Effect of Carbon Nanotubes/Surfactant Dispersions in Portland Cement Pastes

Table 3

Fracture mechanics analysis results.

Sample	E (GPa)	ac (mm)	ac − a0 (mm)	(Pa·m^1/2 10^5)	CTODc (µm)
Ref.	8.72 ± 0.62	6.03 ± 0.35	1.01 ± 0.37	3.05 ± 0.20	3.54 ± 1.01
P-TX-100 10 mM	4.44 ± 0.50	6.00 ± 0.06	0.93 ± 0.09	1.97 ± 0.09	4.37 ± 0.84
B-TX-100 10 mM + 0.15% MWCNT	6.66 ± 0.89	6.65 ± 0.47	1.54 ± 0.57	2.45 ± 0.16	4.67 ± 0.61
P-SDS 100 mM	3.27 ± 0.35	6.62 ± 0.05	1.57 ± 0.05	1.29 ± 0.13	5.14 ± 0.22
B-SDS 100 mM + 0.15% MWCNT	4.84 ± 0.09	6.76 ± 0.46	1.73 ± 0.46	1.95 ± 0.15	5.57 ± 1.26
P-CPC 100 mM	5.53 ± 0.49	6.20 ± 0.19	1.27 ± 0.10	2.35 ± 0.09	4.93 ± 0.56
B-CPC 100 mM + 0.15% MWCNT	5.76 ± 1.12	6.54 ± 0.42	1.56 ± 0.43	2.48 ± 0.23	5.72 ± 1.52