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Publication Number: FHWA-HRT-04-079
Date: July 2006

Seasonal Variations in The Moduli of Unbound Pavement Layers

Appendix A: Variation in Tdr Moisture Data

Table 55. Pooled within-day standard deviation of volumetric moisture from individual TDR probes (percent)
  TDR Probe (Increasing Number Corresponds to Increasing Depth)
Section 1 2 3 4 5 6 7 8 9 10
040113 0.14 0.66 0.89 0.87 1.70 1.36 1.33 3.03 1.29 1.66
040114 0.67 0.36 0.03 0.51 0.39 0.68 0.52 0.73 1.00 1.54
041024 1.52 0.83 0.24 0.42 0.44 0.28 1.11 0.79 1.20 1.11
081053 0.74 2.13 0.22 2.14 1.36 0.76 0.62 0.50
091803 0.82 0.76 1.72 1.43 0.55 0.82 0.19 0.16 0.68 0.12
131005 0.52 0.50 0.82 0.31 0.44 0.41 1.28 0.71 0.20 0.42
131031 0.95 0.19 1.06 0.72 0.27 0.51 0.83 0.32 0.33 0.23
161010 0.16 0.66 0.40 1.03 1.44 0.45 0.52 0.46 0.49 3.40
231026 0.87 0.61 0.55 0.37 0.62 0.21 0.59 0.72 0.75 0.21
241634 0.04 0.05 0.07 0.24 0.04 1.11 0.03 0.05 0.04 0.07
251002 0.48 0.73 0.93 0.80 0.39 0.69 0.76 2.08 2.22 1.86
271018 0.31 0.83 0.49 0.43 0.40 1.05 0.43 1.13 1.41 0.50
271028 0.26 0.36 0.49 0.49 0.56 0.31 0.23 1.09 1.38 1.20
276251 0.52 0.49 0.38 1.30 0.69 0.60 0.72 0.15 0.14 0.83
308129 2.41 0.68 1.20 3.26 0.46 0.65 0.57 0.80 0.61 0.59
331001 1.43 1.65 1.13 0.58 0.21 1.86 0.30 0.35 1.00 2.16
351112 0.23 0.04 0.05 0.04 0.64 0.64 0.31 0.68 0.48
481068 0.14 8.07 15.11 4.44 15.68 14.68 15.14 0.60 0.78 13.07
481077 0.30 0.34 0.19 0.28 0.20 0.34 0.25 0.37 0.17 0.15
491001 0.50 0.06 0.14 0.60 0.30 0.57 0.75 0.87 1.16 0.44
501002 0.87 0.74 0.77 1.11 1.10 2.33 1.90 1.76 0.58 0.30
561007 0.52 0.40 0.55 0.30 0.40 0.21 0.74 1.12 1.07 1.87
831801 0.27 0.20 0.16 0.16 0.28 0.27 0.70 1.52 1.08 0.51
871622 0.54 0.32 0.37 0.20 0.35 0.64 0.32 0.31 2.17 0.29
906405 0.26 0.34 0.62 0.74 0.30 0.34 0.24 0.29 0.50 0.18
Table 56. Number of test dates considered in computation of pooled standard deviation for individual TDR moisture probes
Section TDR Probe (Increasing Number Corresponds to Increasing Depth)
1 2 3 4 5 6 7 8 9 10
040113 12 15 15 15 15 15 15 12 13 13
040114 10 10 10 10 10 10 10 8 8 8
041024 15 15 15 15 15 15 15 15 14 15
081053 10 19 3 5 8 6 15 15
091803 31 30 30 30 30 30 29 27 27 28
131005 24 24 19 23 23 23 22 24 24 24
131031 8 8 14 19 14 17 9 9 19 19
161010 28 27 28 28 29 28 28 28 29 25
231026 34 29 34 19 33 31 32 30 23 33
241634 9 9 9 9 4 9 9 9 5 9
251002 31 31 29 30 32 32 29 25 28 28
271018 25 18 26 19 18 14 23 12 26 29
271028 22 22 23 22 23 25 25 23 24 25
276251 28 30 30 30 30 30 30 30 30 30
308129 15 21 28 11 27 18 30 24 11 23
331001 25 25 25 25 25 15 23 20 14 17
351112 18 18 18 18 20 20 18 15 2
481068 18 6 2 1 2 2 2 1 1 2
481077 29 27 26 26 25 26 26 26 26 26
491001 16 16 16 16 12 12 12 14 17 17
501002 29 29 29 26 7 20 25 26 27 11
561007 5 5 5 5 5 5 5 5 5 5
831801 26 27 26 26 26 19 24 24 25 25
871622 21 22 22 22 21 21 22 20 19 17
906405 27 28 28 28 27 28 28 27 27 27
Table 57. Mean number of moisture observations per day considered in computation of within-day standard deviation
Section TDR Probe (Increasing Number Corresponds to Increasing Depth)
1 2 3 4 5 6 7 8 9 10
040113 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.4 2.3 2.3
040114 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3
041024 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.6 2.4
081053 2.1 2.2 2.0 2.2 2.1 2.2 2.3 2.3
091803 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1
131005 2.7 2.7 2.6 2.7 2.7 2.7 2.7 2.6 2.7 2.7
131031 2.9 2.9 2.6 2.6 2.6 2.7 2.6 2.8 2.6 2.7
161010 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.2 2.3
231026 2.0 2.0 2.0 2.1 2.0 2.0 2.0 2.0 2.0 2.0
241634 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
251002 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
271018 2.2 2.3 2.2 2.3 2.3 2.4 2.2 2.1 2.2 2.2
271028 2.3 2.3 2.3 2.3 2.3 2.2 2.2 2.3 2.3 2.2
276251 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2
308129 2.3 2.5 2.4 2.5 2.4 2.4 2.4 2.3 2.5 2.3
331001 2.0 2.1 2.1 2.0 2.0 2.1 2.0 2.1 2.1 2.1
351112 2.7 2.7 2.7 2.7 2.6 2.6 2.5 2.7 3.0
481068 2.7 2.7 2.5 3.0 2.5 2.5 2.5 3.0 3.0 2.5
481077 2.6 2.7 2.7 2.7 2.7 2.7 2.6 2.7 2.7 2.7
491001 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.3 2.4 2.4
501002 2.0 2.0 2.0 2.0 2.0 2.1 2.0 2.0 2.0 2.0
561007 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2
831801 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.1 2.2 2.2
871622 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
906405 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2
Table 58. Pooled within-day standard deviation divided by maximum Model 1 error
Section TDR Probe (Increasing Number Corresponds to Increasing Depth)
1 2 3 4 5 6 7 8 9 10
040113 0.0 0.1 0.2 0.2 0.3 0.3 0.2 0.6 0.2 0.3
040114 0.1 0.1 0.0 0.1 0.1 0.1 0.1 0.1 0.2 0.3
041024 0.3 0.2 0.0 0.1 0.1 0.1 0.2 0.1 0.2 0.2
081053 0.1 0.4 0.0 0.4 0.3 0.1 0.1 0.1
091803 0.2 0.1 0.3 0.3 0.1 0.2 0.0 0.0 0.1 0.0
131005 0.1 0.1 0.2 0.1 0.1 0.1 0.2 0.1 0.0 0.1
131031 0.2 0.0 0.2 0.1 0.1 0.1 0.2 0.1 0.1 0.0
161010 0.0 0.1 0.1 0.2 0.3 0.1 0.1 0.1 0.1 0.6
231026 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.0
241634 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.0
251002 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.4 0.4 0.3
271018 0.1 0.2 0.1 0.1 0.1 0.2 0.1 0.2 0.3 0.1
271028 0.0 0.1 0.1 0.1 0.1 0.1 0.0 0.2 0.3 0.2
276251 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.0 0.0 0.2
308129 0.4 0.1 0.2 0.6 0.1 0.1 0.1 0.1 0.1 0.1
331001 0.3 0.3 0.2 0.1 0.0 0.3 0.1 0.1 0.2 0.4
351112 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.1 0.1
481068 0.0 1.5 2.8 0.8 2.9 2.7 2.8 0.1 0.1 2.4
481077 0.1 0.1 0.0 0.1 0.0 0.1 0.0 0.1 0.0 0.0
491001 0.1 0.0 0.0 0.1 0.1 0.1 0.1 0.2 0.2 0.1
501002 0.2 0.1 0.1 0.2 0.2 0.4 0.4 0.3 0.1 0.1
561007 0.1 0.1 0.1 0.1 0.1 0.0 0.1 0.2 0.2 0.3
831801 0.1 0.0 0.0 0.0 0.1 0.1 0.1 0.3 0.2 0.1
871622 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.4 0.1
906405 0.0 0.1 0.1 0.1 0.1 0.1 0.0 0.1 0.1 0.0

Note: Values greater than 0.5 indicate that the within-day standard deviation is greater than the estimated standard error of the prediction. Ratios greater than 0.5 are denoted in the table by gray shading.

Table 59. Data sets for which individual within-day standard deviations exceed three times the overall pooled value
Section TDR Number Date Volumetric Moisture
Mean Std. Deviation
040113 5 Wednesday, August 14, 1996 8.43 3.86
040113 5 Tuesday, November 17, 1998 7.01 3.73
040113 7 Wednesday, August 14, 1996 8.73 3.61
040113 8 Tuesday, November 17, 1998 6.73 5.35
040113 8 Wednesday, October 11, 1995 20.63 6.18
040113 10 Wednesday, August 14, 1996 9.26 4.10
081053 2 Thursday, February 13, 1997 7.95 5.02
081053 2 Friday, September 26, 1997 6.99 5.10
081053 4 Monday, March 14, 1994 17.43 3.58
081053 5 Thursday, June 16, 1994 21.69 4.09
091803 1 Thursday, March 10, 1994 23.30 4.67
091803 2 Thursday, March 10, 1994 24.05 3.61
091803 3 Thursday, February 17, 1994 14.15 7.00
091803 3 Thursday, March 10, 1994 25.91 6.94
091803 4 Thursday, February 17, 1994 13.85 7.42
091803 6 Thursday, March 10, 1994 20.53 4.71
131005 7 Thursday, November 30, 1995 26.57 5.08
161010 5 Monday, May 22, 1995 10.40 8.34
161010 10 Thursday, November 17, 1994 34.87 7.16
161010 10 Tuesday, December 13, 1994 35.00 6.93
161010 10 Tuesday, September 27, 1994 35.07 7.59
161010 10 Wednesday, November 2, 1994 33.00 7.64
251002 4 Wednesday, October 09, 1996 8.75 3.75
251002 8 Wednesday, February 1, 1995 31.95 10.11
251002 9 Wednesday, February 1, 1995 25.15 7.85
251002 10 Wednesday, August 24, 1994 6.40 3.96
251002 10 Wednesday, July 27, 1994 6.70 4.24
251002 10 Wednesday, October 9, 1996 5.80 4.10
251002 10 Wednesday, December 4, 1996 7.50 3.96
276251 4 Wednesday, April 9, 1997 6.70 4.24
276251 4 Wednesday, May 7, 1997 5.85 4.60
276251 4 Wednesday, April 23, 1997 6.15 4.45
276251 5 Wednesday, April 23, 1997 6.25 3.75
276251 7 Wednesday, April 9, 1997 7.20 3.68
271028 8 Thursday, April 10, 1997 8.30 4.24
271028 9 Tuesday, June 14, 1994 6.35 4.03
271018 9 Monday, September 08, 1997 17.75 6.15
308129 1 Wednesday, October 1, 1997 10.13 6.69
308129 1 Wednesday, October 20, 1993 9.55 4.17
308129 1 Wednesday, June 18, 1997 9.12 4.98
308129 3 Wednesday, October 01, 1997 10.72 3.85
308129 3 Thursday, January 23, 1997 4.70 4.67
308129 4 Wednesday, October 01, 1997 15.02 4.84
308129 4 Wednesday, June 18, 1997 14.76 8.51
308129 8 Monday, August 11, 1997 17.25 3.89
331001 1 Monday, March 21, 1994 16.53 4.19
331001 2 Monday, March 21, 1994 17.45 4.63
331001 6 Monday, March 21, 1994 20.77 5.06
331001 10 Tuesday, January 24, 1995 36.90 7.92
481068 2 Thursday, August 21, 1997 20.95 25.53
481068 3 Thursday, August 21, 1997 21.30 26.16
481068 4 Wednesday, January 12, 1994 46.73 4.44
481068 5 Thursday, August 21, 1997 22.40 27.15
481068 6 Thursday, August 21, 1997 20.70 25.31
481068 7 Wednesday, January 12, 1994 47.57 4.43
481068 7 Thursday, August 21, 1997 20.90 25.46
481068 10 Thursday, August 21, 1997 21.70 22.63
501002 1 Wednesday, May 25, 1994 10.20 3.96
501002 4 Monday, December 20, 1993 16.49 4.32
501002 6 Wednesday, April 13, 1994 32.95 6.98
501002 7 Wednesday, April 13, 1994 31.87 6.41
501002 8 Wednesday, April 13, 1994 31.69 6.09
831801 8 Wednesday, February 15, 1995 18.40 5.94
831801 9 Wednesday, February 15, 1995 23.00 3.68
871622 9 Thursday, September 25, 1997 36.55 9.26
906405 4 Wednesday, October 6, 1993 8.26 3.75
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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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