Determining deleterious material and decantation

SPECIFIC GRAVITY AND ABSORPTION OF FINE AGGREGATES …

Specific Gravity is important for several reasons. Some deleterious particles are lighter than the "good" aggregates. Tracking specific gravity can sometimes indicate a change of material or possible contamination. Differences in specific gravity may be used to separate the deleterious particles from the good using a heavy media liquid.

  Material, Deleterious