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

Table 3

Creep peak stress (σ_c) and conventional uniaxial compression peak stress (σ_c0) of concrete with different fly ash replacement ratios (m).

m (wt %)		0	20	35	50
Axial compression test	σc0 (MPa)	58.1	65.5	63.4	53.8
Gradation loading creep test	σc (MPa)	50.5	60.3	53.8	46.0
Drop ratio (r = (σc0 − σc)/σc0)		13.08%	7.94%	15.14%	14.50%