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

<div>Relationships between the thermal conductivity and water content of polyphenolic and polyurethane insulation boards at room temperature. (a) Polyphenolic. (b) Polyurethane.</div>

Advances in Materials Science and Engineering

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Figure 10

Figure 10: Study on Water Absorption and Thermal Conductivity of Tunnel Insulation Materials in a Cold Region under Freeze-Thaw Conditions 