Table 5 Volume of permeable voids for various systems.

Mix systems

Absorption after immersion (B−A)/A × 100 (%)

Absorption after immersion and boiling (C−A)/A × 100 (%)

Bulk density, dry A/(C−D) × ρ [g₁] (mg/m³)

Bulk density after immersion B/(C−D) × ρ

Bulk density after immersion and boiling C/(C−D) × ρ

Apparent density A/(A−D) × ρ [g₂] (mg/m³)

Volume of permeable voids (%) [(g₂−g₁)/g₂] × 100