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Table 2 Physical properties of polystyrene beads.

From: Structural Behaviour of Polystyrene Foam Lightweight Concrete Beams Strengthened with FRP Laminates

Apparent density (kg/m3)

12.13

Specific density (kg/m3)

18.5

Compactness (%)

65.57

Porosity (%

34.43

Thermal conductivity λ (W. m−1. K−1)

0.028

Thermal diffusivity a (mm2/s)

1.23

Specific heat c (MJ. M−3. K−1)

0.022