What does particle size have to do with footing?
Dust is that portion of footing that is fine or super fine particles. To control these fine and super fine particles we have to estimate how many particles are in the footing. As footing degrades, the particle count grows exponentially and increases the volume of Arena Rx that we recommend. To demonstrate how many particles may be in an arena, consider the following: In an arena 200 x 100 x 3 depth, if every particle were 1/8 in size, these would be 4,690,000,000 particles (4.69 Billion) if every particles were .0029 (-200 mesh) there would be 376,000,000,000 (376,000 billion) particles. The number is less important than the dramatic relative difference.