Structural Layer Coefficient for Flexible Pavement
Publication: Journal of Transportation Engineering
Volume 110, Issue 2
Abstract
In order to design flexible pavements employing the AASHO Interim Guide, one must know the layer coefficients of pavement materials. The results of a study to derive structural layer coefficients of several Mississippi pavement materials—surface mixture and base mixture of asphalt concrete, soilcement, and soil‐lime—are presented. Fatigue cracking is the criterion employed in deriving the structural layer coefficients. A model is developed to estimate fatigue life or performance or both of pavements treating traffic, material characteristics, and environmental effects as stochastic variables. Material characteristics that govern the pavement performance include resilient modulus and fatigue sensitivity. Although the inputs are probabilistic, the resulting model equation is deterministic and amenable to direct solution for the analysis/design of flexible pavements. Using this model with the stipulation that fatigue cracking in the wheel paths be less than 45%, the researcher establishes equivalent pavement cross sections. The layer equivalency of various materials is derived by comparing equivalent cross sections. The resulting layer coefficient values for base, soil‐cement, and soil‐lime are in agreement with those proposed by the AASHO Committee on Design.
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References
1.
“AASHO Interim Guide for Design of Pavement Structure,” American Association of State Highway and Transportation Officials, Washington, D.C., 1972.
2.
“AASHO Road Test,” Highway Research Board, Special Report 73, Washington, D.C., 1962.
3.
Busching, H. W., Roberts, F. L., Rostron, J. P., and Schwartz, A. E., “An Evaluation of Relative Strength of Flexible Pavement Components,” Final Report, Dept. of Civ. Engrg., Clemson Univ., Clemson, 1971.
4.
Coffman, B. S., Ilves, G., and Edwards, W., “Theoretical Asphaltic Concrete Equivalencies,” Highway Research Board, Record No. 239, Washington, D.C., 1968.
5.
Finn, F. N., “Observations of Distress in Full Scale Pavements,” Highway Research Board, Special Report 126, Washington, D.C., 1971.
6.
George, K. P., “Material Parameters for Pavement Design Using AASHO Interim Guide,” Univ. of Mississippi, Civ. Engrg. Report, Final Report, University, Mississippi, 1981.
7.
George, K. P., and Nair, S. K., “Probabilistic Fatigue Design for Flexible Pavements,” Proceedings, Fifth Int. Conf. Struct. Design of Asphalt Pavements, Delft, The Netherlands, 1982.
8.
George, K. P., Rao, J. S., Darter, M. I., and Saxena, S. K., “Interim Guide for Design of Premium Pavements,” Final Report to FHWA, Washington, D.C., 1982.
9.
Hwang, D., and Witczak, M. W., “Program DAMA (CHEVRON), User's Manual,” Univ. of Maryland, College Park, 1979.
10.
Jordan, W., Personal Communication, Mississippi State Highway Department, Jackson, Mississippi, 1981.
11.
Miner, M. A., “Cumulative Damage in Fatigue,” Transactions of the ASME, Vol. 67, 1945.
12.
Mitchell, J. K., and Shen, C. K., “Soil‐Cement Properties Determined by Repeated Loading in Relation to Bases for Flexible Pavements,” Proc. Fourth Int. Conf. Struct. Design of Asphalt Pavements, Univ. of Michigan, Ann Arbor, 1967.
13.
Monismith, C. L., and Deacon, J. A., “Fatigue of Asphalt‐Pavement Mixtures,” Journal of the Transportation Engineering Division, ASCE, Vol. 88, No. TE2, 1969.
14.
Monismith, C. L., “Asphalt Mixture Behavior in Repeated Flexure,” Report No. TE‐70.5, Institute of Transportation and Traffic Engineering, Univ. of California, Berkeley, 1970.
15.
Pell, P. S., and Taylor, I. F., “Asphaltic Road Materials in Fatigue,” Proceedings, AAPT, Vol. 38, 1969, pp. 371–422.
16.
Pretorius, P. C., “Design Considerations for Pavements Containing Soil‐Cement Bases,” Dissertation offered to the University of California at Berkeley in 1970, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
17.
Schmidt, R. J., “A Practical Method for Measuring the Resilient Modulus of Asphalt‐Treated Mixes,” Highway Research Board Annual Meeting, Washington, D.C., 1972.
18.
Scott, J. L. M., “Flexural Stress‐Strain Characteristics of Saskatchewan Soil‐Cements,” Technical Report 23, Saskatchewan Department of Highways, Saskatchewan, Canada, 1974.
19.
Terrel, R. L., and Krukar, M., “Evaluation of Test Tracking Pavements,” Proceedings, AAPT, Vol. 39, 1970, pp. 272–296.
20.
Wang, M. C., and Larson, T. D., “Performance Evaluation for Bituminous Concrete Pavements at Penn State Test Track,” Department of Civ. Engrg., Pennsylvania State University, State College, 1976.
21.
Wirsching, P. H., and Yao, J. T. P., “A Probabilistic Design Approach Using the Palmgren‐Miner Hypothesis,” Methods of Structural Analysis, Proc. Nat. Struct. Engrg. Conf., Vol. 1, 1976, pp. 324–339.
22.
Witczak, M. W. “Development of Regression Models for Asphalt Concrete Modulus for Use in MS‐1 Study,” The Asphalt Institute, College Park, Md., 1978.
Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 110 • Issue 2 • March 1984
Pages: 251 - 267
Copyright
Copyright © 1984 ASCE.
History
Published online: Mar 1, 1984
Published in print: Mar 1984
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