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Table 5 Thermal and mechanical properties of concrete and ground.

From: Thermal and Mechanical Behaviors of Concrete with Incorporation of Strontium-Based Phase Change Material (PCM)

Properties

Concrete

Ground

Specific heat (kcal/N∙°C)

0.025

0.02

Density (N/m3)

23,500

17,000

Thermal conductivity (kcal/m h °C)

2.3

1.7

Convection coefficient (kcal/m2 h °C)

12

12

Ambient temperature (°C)

20

Prescribed temperature (°C)

20

Compressive strength (MPa)

Variable

Modulus of elasticity (MPa)

Variable

980

Coefficient of expansion

1.0 × 10−5

1.0 × 10−5

Poisson’s ratio

0.167

0.2