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Association of California Airports ACA Annual Conference Pavement Evaluation Pavement Maintenance/Management Plan (PMMP) September 11, 2014 Reinard W. Brandley CONSULTING AIRPORT ENGINEER 6125 King Road, Suite 201 Loomis, California 95650 brandley@rwbrandley.com (916) 652-4725
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“We Are Throwing Too Much Money at the Symptoms Not Enough at Determining the Cause of Distress” ~Herman Bliss Reinard W. Brandley CONSULTING AIRPORT ENGINEER 2
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER There are Four Major Items that Need to be Considered in Evaluating a Pavement and Developing a PMMP: Geotechnical Surface Distress Deep-Seated Distress Frost Action 3
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER Geotechnical Studies – Applied Soil Mechanics Pavement History Pavement Section Soil Profile – 200’ to 500’ Hole Spacing – 10’ to 15’ Deep Testing Soil Classification Dry Density Natural Moisture Content Ground Water Table and Fluctuations Strength – CBR Consolidation Swell 4
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER Geotechnical Studies – Applied Soil Mechanics 5 Tampa International – Expansive CTB
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER Geotechnical Studies – Applied Soil Mechanics Stockton Metropolitan Airport & Rio Vista Municipal Airport Swelling Soil 6
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER Surface Distress – Pavement Condition Survey Features that Cause Surface Distress: Weathering Environmental Frost Action Loading – Type and Frequency Jet Blast Fuel/Oil Spills Geotechnical and Subgrade Problems Type of Pavement Section 7
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER Surface Distress – Pavement Condition Survey Surface Distress Types: Cracking Shoving Weathering Raveling Rutting Fuel Spill Deterioration Bleeding Patching Depressions 8
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Reinard W. Brandley CONSULTING AIRPORT ENGINEER Surface Distress – Pavement Condition Survey PCI vs. Time 9
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Deep Seated Distress Factors to use in Fatigue Analysis: Pavement Section – Type and Thickness Subgrade & Subsoil Stratification to 10’ to 15’ Depth Modulus of Elasticity of Each Layer FWD Back-Calculation (Slide #11) Deflection Bowl (Slide #12) Operations vs. Coverages Traffic Index (Slide #13) Failure and Criteria Reinard W. Brandley CONSULTING AIRPORT ENGINEER 10
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Deep Seated Distress – FWD Deflections Reinard W. Brandley CONSULTING AIRPORT ENGINEER 11
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Deep Seated Distress – FWD Deflection Bowl 12 Reinard W. Brandley CONSULTING AIRPORT ENGINEER
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Deep Seated Distress – Traffic Indexes Reinard W. Brandley CONSULTING AIRPORT ENGINEER 13
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Deep Seated Distress R. W. Brandley Fatigue Analysis 61-Year Performance Record Reinard W. Brandley CONSULTING AIRPORT ENGINEER FAARFIELD 4 to 5-Year Performance Record 14
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Deep Seated Distress Reinard W. Brandley CONSULTING AIRPORT ENGINEER Comparative Study of Remaining Life Brandley and FAARFIELD 15
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PMMP - Deep-Seated Distress – Brandley Fatigue Analysis 16
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PMMP - Remaining Life – Brandley vs. FAARFIELD Reinard W. Brandley CONSULTING AIRPORT ENGINEER 17
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Frost Action Reinard W. Brandley CONSULTING AIRPORT ENGINEER Frost Heave Spring Melt – Super-Saturation Depth of Frost Penetration 18
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PMMP - Brandley Test Hole & Pit Plan and Soil Profiles 19
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PMMP - Surface Distress – Pavement Condition Index (PCI) 20
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PMMP – Pavement Condition Survey & Rehab. Schedule Reinard W. Brandley CONSULTING AIRPORT ENGINEER 21
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PMMP - Rehabilitation Plan – Each Unit Reinard W. Brandley CONSULTING AIRPORT ENGINEER 22
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PMMP - Maintenance and Rehabilitation Schedule – By Year Reinard W. Brandley CONSULTING AIRPORT ENGINEER 23
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PMMP - Maintenance & Rehabilitation Schedule – By Year 24
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