Crack Risk Evaluation of Submerged Concrete Tunnel during Hardening Phase

Table 9

Calculated stress/strength ratios at inner and outer walls at 14 days.

Concrete	Outer wall	Middle wall	Tensile strength	σt/ft outer wall	σt/ft inner wall
	σtensile, max	σtensile, max
SV 40	3.91	4.40	3.79	1.04	1.18
40% FA	2.69	2.99	3.19	0.86	0.96
60% FA	2.14	2.38	2.91	0.74	0.82
60% FA-11°C	1.49	1.66	2.86	0.52	0.58
40% BFS	3.35	3.71	3.74	0.90	1.01
60% BFS	3.19	3.60	3.20	1.00	1.13