CLIMATIC-MATERIALS-STRUCTURAL PAVEMENT ANALYSIS PROGRAM

The Climatic-Materials-Structural (CMS) program has been set up to introduce climatic effects into the analysis of multilayered flexible pavement systems. The program may be used with selected pavement structural and performance models to analyze a pavement system. It can also be employed as a tool to analyze existing pavement systems in order to obtain estimates of future maintenance requirements. The CMS program is compatible with several pavement structural models for determining radial stresses, strains, and displacements. These structural models include the ILLI-PAVE model, ILLI-PAVE algorithms, and elastic layer analysis. The accuracy of the CMS output depends mainly on the quality of the inputs. It is important that boundary conditions, climatic conditions, and material properties properly represent the system to be analyzed. With representative inputs the CMS program will give realistic values for temperature and moisture profiles and material strength properties. Although future research is required to validate the overall model, the validity of the individual parts of the CMS program has been shown. Analysis of existing pavement systems and comparison of CMS outputs with actual field conditions are recommended. It is expected that further validation studies will confirm the belief that the CMS program provides an economical and realistic means of analyzing multilayered flexible pavement systems by accounting for climatic effects on pavement materials.

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