PHYSICAL CHARACTERISTICS OF EXPANDED SLATE AGGREGATE  
1/2 (12.5mm) Structural Aggregate  

Density
  • Dry Loose (ASTM C29)
  • Saturated Surface Dry Loose (ASTM C29)

50 lbs/cf 805 kg/m3
52 lbs/cf 833 kg/m3
Specific Gravity
  • Dry (ASTM C127)
  • Saturated Surface Dry (ASTM C127)

1.45
1.52
Absorption
  • Saturated Surface Dry (ASTM C127)
  • Under High Pumping Pressure of 150 psi (1033 kPa)
 
6%
9.4%
Soundness
  • Magnesium Sulfate (ASTM C88)
  • Sodium Sulfate (ASTM C88)
  • After 25 Cycles Freezing & Thawing (AASHTO T103)


0.01%
0.23%
0.22%
Toughness
  • Los Angeles Abrasion (AASHTO T-96-B)

25%