1. PAVEMENTS - DESIGN FIELD SAMPLE
DETERMINING STABILIZER BY No. 200 SIEVE / PLASTIC INDEX
Determine In-Situ Moisture Content and Record
Perform Sieve Analysis
ASTM
>25 Percent passing No. 200
<25 Percent passing No. 200
Perform Atterberg Limit
ASTM
Perform Atterberg Limit
ASTM
PI > 30
12>PI<30
12>PI < 30
PI <12
Lime Stabilizer
Lime /Cement Blends
Lime /Cement Blends
Cement Stabilizer

2. LAB TESTING LIME/CEMENT BLEND
Determine as-received H2O content Cal Test 226 (Record)
Lean Clay/Silt
12< PI >30
Estimate optimum moisture + 4%
1to 2 min. 8 hrs
2+ to 5 min. 18 hrs
5+ to min. 36 hrs
min. 48 hrs
QUICKLIME
TREATMENT
2,3,& 4% +
Mellow per
Modified CALTRANS 373
Prepare - per CALTRANS 373 Moisture/Density Relationship
CEMENT
TREATMENT
2,3,& 2:1 (cement to water ratio)
Option: Test Using ASTM 1633 (Method A) Modified Compaction per ASTM 1557
UCCS
CALTRANS 373
Durability Test
Wet/Dry
ASTM D 559
Permeability Test ASTM D4318 or CT220

3. Chemical Stabilization Optimum + Hydration
Hydration for Lime/Cement Blends
Example Moisture Requirement for Soil - Lime/Cement Mixture
2% Lime + 2% Water
2% Cement + 1% Water
Total Treated Optimum + 3% over + 3% Hydration Water = 6 % water requirement
Zero Air Voids Curve
Maximum Density
95% of Maximum
90% of Maximum
Allowable Moisture 90%
Lime 4% Max over Treated Optimum
Cement 2% Max over Treated Optimum
Optimum Moisture
Lime/Cement Blend 3% Max over Treated Optimum

4. Chemical Stabilization Optimum + Hydration
Determine In-Situ Moisture Content
Determine Percentage difference between In-Situ and Optimum Moisture Content.
Determine if Additional Stabilizer is required to reduce In-Situ Moisture Content to required moisture range.
Zero Air Voids Curve
Maximum Density
95% of Maximum
90% of Maximum
Allowable Moisture 90%
Lime 4% Max over Optimum
Cement 2% Max over Optimum
Optimum Moisture
Fly Ash 2% Max under Optimum