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

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 8% @ min. 36 hrs 8+% @ min. 48 hrs QUICKLIME TREATMENT Apply @ 2,3,& 4% + Mellow per Modified CALTRANS 373 Prepare - per CALTRANS 373 Moisture/Density Relationship CEMENT TREATMENT Apply @ 2,3,& 4% @ 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

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 Range @ 90% Lime 4% Max over Treated Optimum Cement 2% Max over Treated Optimum Optimum Moisture Lime/Cement Blend 3% Max over Treated Optimum

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 Range @ 90% Lime 4% Max over Optimum Cement 2% Max over Optimum Optimum Moisture Fly Ash 2% Max under Optimum