Interface Bonding Properties between Nonwater Reaction Polyurethane Polymer Materials and Concrete

Table 3

Relationship between moisture content and bond strength.

Number	Temperature (°C)	Moisture content (%)	Ave. moisture content (%)	Soaking time (h)	Bond strength (MPa)	Ave. bond strength (MPa)
1–3	0	0	0	0	0.42	0.48
		0			0.56
		0			0.46
	0	0.8	0.98	3	0.37	0.3
13–15		1.03			0.44
		1.11			0.09
	0	0.95	0.83	10	0.29	0.71
25–27		0.47			0.64
		1.08			1.12
	0	0.93	1.3	24	0.25	0.19
37–39		1.19			0.2
		1.79			0.11