Understanding Drainage 3 Secrets to successful sports of ...
Transcript of Understanding Drainage 3 Secrets to successful sports of ...
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Understanding Drainage of Athletic Fields
Dr. Andy McNittPenn State University
3 Secrets to successful sports field management is …..
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½ % Slope
1% Slope
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Backfill Options
GravelChoker Material
Choker Material, & Topdressing
Low Play Moderate Play High Play
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Pittsburgh Steelers Practice Field
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Include clean outs
Installation Details
Maintain constant slope Tape all joints
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Locator wire
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Gravel Base Topdressed Fine Grit
Grit Rolled
Rolled Topdressed Fine Grit
www.personal.psu.edu/asm4
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Base Specifications
• Compacted Percolation Rate = 79.8 in/hr• To ensure structural stability• D60/D10 > 5 and 1 < D30 squared/(D60/D10) <
3• D60/D10 = 2 and D30 Squared /(D60/D10) =
9.68• To ensure separation of both stones:
Specification ( 3 - 6)• D50 base stone / D50 top stone = 1.85• Specification ( >2)• D85 finishing stone / D15 base stone = 1.14
ASTM Standards
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Perfectly Hydrophobic Surface
By using surfactants
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What is a surfactant? 3 Main Types of Surfactant
• Anionic Surfactants
• Cationic Surfactants
Non-ionic surfactantsLocalized Dry Spot
Hydrophobicity
• Repels Water
• Percolation
• 3 in/hr
• 30 in/hr
• 300 in/hr
Fabric Softener
Citrus Blast
Orange Crystal
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