Investigation on Mechanical and Microstructure Properties of Steel Fiber Reinforced Concrete

Table 3

Results of concrete strength analysis.

Environmental erosion conditions	Regression equation	R^2	RSS
H2O	fc = 7.05x^2 − 4.95x + 26.5	0.94	35.44
Freeze-thaw cycles	fc = 3.3x^2 + 0.1x + 19.3	0.89	35.22
NaCl	fc = −16.45x^2 + 35.25x + 29.8	0.95	27.94
Na2SO4	fc = −2.6x^2 + 9.4x + 29.2	0.80	30.52
H2SO4	fc = 6.05x^2 − 4.45x + 21.3	0.88	58.06
NaOH	fc = 5.1x^2 − 3.9x + 34.9	0.89	35.86