试件规格	龄期(天)	线性拟合公式	相关系数R²
150 mm × 150 mm × 150 mm	7	n_e1 = 0.956P + 1.809	0.991
150 mm × 150 mm × 150 mm	28	n_e2 = 0.991P + 2.341	0.991
100 mm × 100 mm × 400 mm	7	n_e3 = 0.976P + 1.444	0.998
	28	n_e4 = 1.016P + 1.248	0.993
	28 (抗冻)	n_e5 = 0.948P + 2.500	0.990
150 mm × 150 mm × 300 mm	90	n_e6 = 1.044P + 0.510	0.986
150 mm × 150 mm × 550 mm	28	n_e7 = 1.019P + 0.685	0.992