Skip to contentUnited States Department of Transportation - Federal Highway AdministrationSearch FHWAFeedback

Pavements

<< PreviousContentsNext >>

Long-Term Pavement Performance Computed Parameter: Frost Penetration

APPENDIX B. EICM MODELING INPUTS

Table 12. EICM inputs.
Site_ID 16_1010 23_1026 27-4040 27_6251 31_3018 34_0506 34_0902 36_0801 39_0901 46_0804 46_9187 50_1002 56_1007
Start Year 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996 1996
Start Month Sept. Sept. Sept. Sept. Sept. Sept. Sept. Sept. Sept. Sept. Sept. Sept. Sept.
Length Analysis Period (day) 3195 3287 3287 3287 3287 3287 3287 3287 3287 3287 3287 3287 3287
Time Increment Output (hour) 1 1 1 1 1 1 1 1 1 1 1 1 1
Time Increment Calculation (hour) 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Latitude (degrees. minutes ) 43.4 44.34 47.18 47.27 40.4 40.17 40.43 43.21 40.38 45.56 44.46 44.07 44.3
Longitude  (degrees. minutes) -112.07 -70.17 -93.43 -94.54 -99.2 -74.51 -74.1 -77.55 -83.07 -100.25 -102.03 -73.1 -108.55
Short-wave absorptivity 0.8 0.75 0.8 0.9 0.8 0.8 0.8 0.95 0.8 0.8 0.8 0.8 0.9
Upper limit freezing (°F) 32 32 32 32 32 32 32 32 32 32 32 32 32
Lower limit freezing (°F) 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2 30.2
Pavement Layer 1
Material Asphalt Asphalt PCC Asphalt PCC Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt
Thickness (inches) 5.2 9.8 8.1 9 11.9 9.7 12.4 4.9 19.7 7.2 5.9 8.5 2.8
Number of elements 5 10 8 9 12 10 12 5 20 7 6 9 3
Thermal Conductivity (BTU/hr-ft-°F) 0.67 0.67 1 0.67 1 0.67 0.67 1.5 1.5 0.67 0.67 0.67 0.67
Heat capacity (BTU/lb-°F) 0.22 0.22 0.2 0.22 0.2 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22
Unit Weight (pcf) 148 148 150 148 150 148 148 148 148 148 148 148 148
Table 12. EICM inputs—continued.
Site_ID 16_1010 23_1026 27-4040 27_6251 31_3018 34_0506 34_0902 36_0801 39_0901 46_0804 46_9187 50_1002 56_1007
Pavement Layer 2
Material Asphalt                        
Thickness (inches) 5.7                        
Number of elements 6                        
Thermal Conductivity (BTU/hr-ft-°F) 0.67                        
Heat Capacity (BTU/lb-°F) 0.22                        
Unit Weight (pcf) 148                        
Soil Layer 1
Material A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a A-1-a
Thickness (inches) 12 17.6 6 10.2 5.6 10 5 8.4 6 12 11 25.8 6.8
Number of Elements 12 17 6 10 5 10 5 9 6 12 11 26 6
Porosity 0.25 0.25 0.25 0.3 0.25 0.25 0.25 0.25 0.25 0.25 0.1 0.25 0.24
Saturated permeability (ft/hr) 0.0583 0.0583 0.0583 0.0583 0.0583 0.0583 0.0583 0.0583 0.0583 0.0472 0.0416 0.138 0.074
Dry unit weight (pcf) 127 127 127 127 127 127 127 127 127 127 127 127.2 127.1
Dry thermal conductivity (BTU/hr-ft-°F) 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 1.6 0.8 0.8
Dry heat capacity (BTU/ft3-°F) 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22
Initial VMC (%) 15.26 15.26 15.26 2 15.26 15.26 15.26 15.26 15.26 15.26 8 15.08 15.07
Fredlund–af 7.2555 7.2555 7.2555 7.2555 7.2555 7.2555 7.2555 7.2555 7.2555 7.05034 6.94777 7.33241 7.29231
Fredlund–bf 1.234 1.234 1.234 1.234 1.234 1.234 1.234 1.234 1.234 1.28391 1.29552 1.69057 1.41089
Fredlund–cf 0.83152 0.83152 0.83152 0.83152 0.83152 0.83152 0.83152 0.83152 0.83152 0.83784 0.83536 0.81675 0.82058
Fredlund–hr 117.4 117.4 117.4 117.4 117.4 117.4 117.4 117.4 117.4 152.2 169.6 108 113.6
Plasticity Index (PI) 1 1 1 1 1 1 1 1 1 152.2 4 1 1
D60 (mm) 10.82 10.82 10.82 10.82 10.82 10.82 10.82 10.82 10.82 10.82 10.82 10.82 10.82
Passing #4 (%) 44.7 44.7 44.7 44.7 44.7 44.7 44.7 44.7 44.7 44.7 44.7 44.7 44.76.8
Passing #200 (%) 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 8.7 4  
Soil Layer 2
Material A-2-4 A-2-4 A-2-7 A-2-4 A-2-4 A-2-4 A-1-a A-2-4 A-7-5 A-7-5 A-6 A-2-4 A-2-4
Thickness (inches) 300 300 300 300 300 300 5 300 12 300 300 300 300
Number of Elements 150 150 150 150 150 150 5 150 12 150 150 150 150
Porosity 0.27 0.29 0.14 0.29 0.26 0.27 0.25 0.27 0.39 0.38 0.36 0.27 0.27
Saturated permeability (ft/hr) 0.0004.39 0.000792 1.55E-06 1 0.00364 0.000439 0.04 0.000439 4.28E-06 3.29E-06 1.95E-05 0.000439 0.00326
Dry unit weight (pcf) 123.4 120.2 120.8 119.8 124 123.4 127 123.4 102 104.8 107.9 123.4 123.1
Dry thermal conductivity (BTU/hr-ft-°F) 0.8 0.8 0.8 3 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8 0.8
Dry heat capacity (BTU/ft3-°F) 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22 0.22
Initial VMC (%) 18.39 19.65 12 19.77 17.88 18.39 15.26 18.39 32.69 31.24 39.57 18.39 18.54
Fredlund–af 9.28522 10.2125 76.5824 5.74545 5.85556 9.28522 7.2555 9.28522 125.312 117.641 108.409 9.28522 13.4953
Fredlund–bf 0.643865 0.3 0.926038 1.95497 1.8823 0.643865 1.234 0.643865 0.57723 0.621817 0.68007 0.643865 0.567768
Fredlund– cf 3.09113 3.72724 0.42491 0.71916 1.08956 3.09113 0.83152 3.09113 0.10524 0.15556 0.21612 3.09113 3.18708
Fredlund–hr 189.6 100 500 100 110 189.6 117.4 189.6 500 500 500 189.6 160
Plasticity Index (PI) 2 0 14 0 1 2 1 2 24 19 16 2 1
D60 (mm) 0.3216 0.3216 5.73 2 0.3477 0.3216 10.82 0.3216 0.02798 0.02798 0.05364 0.3216 0.3038
Passing #4 (%) 87.2 87.2 55.4 87.2 87.2 87.2 44.7 87.2 94 94 93.5 87.2 87.2
Passing #200 (%) 22.4 22.4 27.4 10 5 22.4 8.7 22.4 70.5 70.5 63.2 22.4 30
Soil Layer 3
Material             A-2-4   A-7-5        
Thickness (inches)             300   300        
Number of Elements             150   150        
Porosity             0.27   0.39        
Saturated permeability (ft/hr)             0.000439   4.28E-06        
Dry unit weight (pcf)             123.4   102        
Dry thermal conductivity (BTU/hr-ft- °F)             0.8   0.8        
Dry heat capacity (BTU/ft3-°F)             0.22   0.22        
Initial VMC (%)             18.39   32.69        
Fredlund–af             9.28522   125.312        
Fredlund–bf             0.643865   0.57723        
Fredlund–cf             3.09113   0.105242        
Fredlund–hr             189.6   500        
Plasticity Index (PI)             2   24        
D60 (mm)             0.3216   0.02798        
Passing #4 (%)             87.2   94        
Passing #200 (%)             22.4   70.5        
Deep ground temperature (°F) 51 48.1 40.88 40.55 51.43 53.74 55.25 47.85 54 44.87 48.13 46.4 46.03

1 inch = 25.4 mm

32 °F = 0 °C (Deduct 32, then multiply by 5, then divide by 9).

Note: For soil layers, The Fredlund Soil Water Characteristic Curve model is used to relate soil suction to water content. Fredlund parameters af and hr have units of psi. Parameters of bf and cf are unitless. Parameter af is a measure of air entry, the soil suction at which the soil becomes less than 100-percent saturated. Parameters bf and cf determine the rate of change of moisture content versus suction as it transitions from saturated to unsaturated (no free water). hr defines the slope of the curve after free water is removed.

<< PreviousContentsNext >>

Events

More Information

Contact

Customer Service
202-493-3035
E-mail Customer

 
 
This page last modified on 04/03/09
 

FHWA
United States Department of Transportation - Federal Highway Administration