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

Table 4

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

Parameter	Fly ash content (wt%)
	0 (stress = 50.5 MPa)	20 (stress = 53.6 MPa)	35 (stress = 49.6 MPa)	50 (stress = 44.9 MPa)
A1	−44.91	−37.72	−26.76	−35.33
B1	566.60	746.85	358.96	646.67
C1	50.57	40.74	31.63	38.02