Study on Creep Mechanical Properties of Non-Water Reacting Polyurethane Grouting Material

Table 4

Fitted parameters of the polyurethane specimen with a density of 0.408 g/cm³.

Stress level (MPa)	E 1 (MPa)	η 1 (GPa·s)	E 2 (MPa)	η 2 (GPa·s)	Correlation coefficient
6.1	1370	1850	163	1700	0.98
6.9	1220	1430	132	1590	0.99
7.7	880	700	115	830	0.99
8.4	345	610	92	780	0.99