Crack Risk Evaluation of Submerged Concrete Tunnel during Hardening Phase

Table 8

Tensile strength at 14 days after casting.

Concrete	ft28 (N/mm^2)	Maturity time at 14 days after casting (days)	Tensile strength at critical time (N/mm^2)
SV40	3.86	22.2	3.79
40% FA	3.32	20.7	3.19
60% FA	3.00	22.5	2.91
60% FA-11°C	3.00	19.7	2.86
40% BFS	3.89	20.7	3.74
60% BFS	3.34	21.0	3.20