Short-Term Gradation Loading Creep Properties and Failure Characteristics of High-Strength Fly Ash Concrete for Underground Engineering

Table 5

Fitting parameters of concrete with various fly ash replacement ratios during the decelerating/isokinetic creep stage.

Parameter	Fly ash content (wt%)
	0 (stress = 56.1 MPa)	20 (stress = 60.3 MPa)	35 (stress = 55.8 MPa)	50 (stress = 50.5 MPa)
A1	−16.60	−47.78	−48.36	−52.09
B1	49.32	456.68	361.45	175.40
C1	16.60	53.06	53.68	55.35
A2	0.047	0.018	0.018	0.031
C2	11.65	31.31	36.79	42.19