sieve analysis - infiltrator water technologies
TRANSCRIPT
Interpreting the Sieve Analysis
Dennis Fogg, Technical AdvisorPresby Environmental, Inc.
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Infiltrator Water Technologies
Today’s Agenda:
Define System SandWhy it’s Important
Understanding the Sieve AnalysisField Testing with Spec-Check®
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Infiltrator Water Technologies
What is System Sand?
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Well graded sand meeting the requirements of ASTM C33
Advanced Enviro‐Septic® (AES)
Advanced Treatment Leachfield(ATL)
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ASTM C33 “Fine Aggregate”
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Sieve ASTM E11 Sieve Size % Passing3/8” 9.5‐mm [.375”] 100#4 4.75‐mm [.187”] 95 to 100#8 2.36‐mm [.0937”] 80 to 100#16 1.18‐mm [.0469”] 50 to 85#30 600‐µm [.0234”] 25 to 60#50 300‐µm [.0117”] 5 to 30#100 150‐µm [.0059”] 0 to 10#200 75‐µm [.0029”] 0 to 3
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Why C33 Sand is Important
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Well Graded Poorly Graded Gap Graded
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Capillary AttractionMeniscus
Attraction is in all directions
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Capillary AttractionInfiltrator Water Technologies
Plan View Section View
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Particle SizeInfiltrator Water Technologies
Fine
r Pa
rtic
le S
ize
Water Retention
Satu
ratio
n
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O2 Delivery to Biologically Active Surface Areas
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Particle Size Distribution Report(Sieve Analysis)
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Coarse
Fine
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Outline of Test Procedure• Bake sample & weigh• Wash sample to remove fines (< #200)• Bake again & weigh again• Place sample in top of sieve stack & shake• Measure weight retained on each screen
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Washing Sample
SandSilt & Clay
GasCapillary Pore
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Graph
Pass/FailTable
Properties
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Upper Limit
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% F
iner Lower Limit
Outside Limit
Particle Size Increasing (mm)
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C33 Screens Highlighted
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Fails
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Coefficient of Uniformity
= (D60 ÷ D10)
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Effective Particle Size
D10 is the size at which 10% are smallerD60 is the size at which 60% are smaller
Cu > 4 indicates well graded
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Upper Limit
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Lower Limit
Outside LimitOutside Limit
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Fails
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Handwritten Report Common
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86.3–6.1 = 80.2
100% 0%0.0
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Sieve % Passing3/8” 100#4 95 to 100#8 80 to 100#16 50 to 85#30 25 to 60#50 5 to 30#100 0 to 10#200 0 to 3
x
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Perc
ent
Fine
r
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Perc
ent
Fine
r
Sieve % Passing3/8” 100#4 95 to 100#8 80 to 100#16 50 to 85#30 25 to 60#50 5 to 30#100 0 to 10#200 0 to 3
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C33 Fineness Modulus (2.3 – 3.1)
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15% Silt/Clay
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Summary
• ASTM C33 sand is important to our systems• Balanced water movement through sand• Particle size report come in many forms• Much more information than is needed• Can always send to technical support
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Spec-Check®
Cannister
Screens Settling Tube
Cup
Funnel
Storage Bag
Instructions
#200
#100
#30
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Silt & Clay
Slurry3%5%
Contact Us
[email protected]@presbyeco.com
Infiltrator‐water‐technologies
PresbyEnvironmental.com
@infiltratorwater
@infiltrator water
@infiltrator
800.473.5298
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