Research on Flexural Properties and Flexural Toughness Evaluation Method of Steel Fiber Reinforced Cementitious Composites under Polar Low Temperatures

Table 4

Calculation results of σ_b.

Specimen number	Temperature (°C)	σb (MPa)	Specimen number	Temperature (°C)	σb (MPa)
0.5vol%	20	2.97	1.0vol%	20	3.83
	0	2.82		0	7.14
	−25	3.69		−25	6.29
	−50	5.42		−50	7.86
	−75	5.19		−75	4.93
	−100	4.48		−100	6.39
1.5vol%	20	3.18	2.0vol%	20	4.14
	0	6.17		0	5.61
	−25	5.90		−25	6.88
	−50	7.60		−50	8.75
	−75	8.72		−75	8.77
	−100	6.36		−100	7.76