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Publication Number: FHWA-HRT-05-150
Date: February 2006

Review of The Long-Term Pavement Performance (LTPP) Backcalculation Results

Appendix A

This appendix consists of charts showing the screening results of the section average backcalculation data.

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Figure 55. Charts. Screening results of section average elastic moduli of the asphalt concrete layer for the flexible sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the linear elastic model.

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Figure 56. Charts. Screening results of section average elastic moduli of the base layer for the flexible sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the linear elastic model.

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Figure 57. Charts. Screening results of section average elastic moduli of the subgrade for the flexible sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the linear elastic model.

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Figure 58. Charts. Screening results of section average elastic moduli of the asphalt concrete layer for the flexible sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the nonlinear elastic model.

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Figure 59. Charts. Screening results of the section average elastic moduli of the base layer for the flexible sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the nonlinear elastic model.

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Figure 60. Charts. Screening results of the section average elastic moduli of the subgrade for the flexible sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the nonlinear elastic model.

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Figure 61. Charts. Screening results of the section average elastic moduli of the PCC slab for the rigid sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the linear elastic model using MODCOMP.

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Figure 62. Charts. Screening results of the section average elastic moduli of the base layer for the rigid sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the linear elastic model using MODCOMP.

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Figure 63. Charts. Screening results of the section average elastic moduli of the subgrade for the rigid sections in the MON_DEFL_FLX_BAKCALC_SECT table based on the linear elastic model using MODCOMP.

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Figure 64. Charts. Screening results of the section average elastic moduli of the PCC slab for the rigid sections in the MON_DEFL_RGD_BAKCALC_SECT table based on the slab-on-elastic-solid model.

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Figure 65. Charts. Screening results of the section average elastic moduli of the PCC slab for the rigid sections in the MON_DEFL_RGD_BAKCALC_SECT table based on the slab-on-dense-liquid model.

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Figure 66. Charts. Screening results of the section average elastic moduli of the base layer for the rigid sections in the MON_DEFL_RGD_BAKCALC_SECT table based on the slab-on-elastic-solid model.

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Figure 67. Charts. Screening results of the section average elastic moduli of the base layer for the rigid sections in the MON_DEFL_RGD_BAKCALC_SECT table based on the slab-on-dense-liquid model.

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Figure 68. Charts. Screening results of the section average elastic moduli of the subgrade for the rigid sections in the MON_DEFL_RGD_BAKCALC_SECT table based on the slab-on-elastic-solid model.

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Figure 69. Charts. Screening results of the section average k-values of the subgrade for the rigid sections in the MON_DEFL_RGD_BAKCALC_SECT table based on the slab-on-dense-liquid model.

FHWA-HRT-05-150

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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).
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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