Study on Water Absorption and Thermal Conductivity of Tunnel Insulation Materials in a Cold Region under Freeze-Thaw Conditions

Table 2

Some parameters of the constant temperature and humidity box.

Index	Parameter
Temperature range	0∼60°C
Temperature fluctuation	±1^°C
Temperature resolution	0.1°C
Relative humidity	45% RH∼99% RH
Humidity error	<6% RH
Size	500  mm × 500 mm × 750 mm

Note: relative humidity is the ratio of absolute humidity in air to saturated absolute humidity at the same temperature.