Extended monitoring and analysis of moisture temperature data : research implementation plan.
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Extended monitoring and analysis of moisture temperature data : research implementation plan.

  • 2006-12-07

Filetype[PDF-105.06 KB]


  • English

  • Details:

    • Alternative Title:
      Monitoring and Analysis of Data Obtained from Moisture-Temperature Recording Stations/ ; Extended Monitoring & Analysis of Moisture Temperature Data ;
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    • Edition:
      Research implementation plan.
    • NTL Classification:
      NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ;
    • Abstract:
      Variations in the mechanical properties of materials of a flexible pavement affect its response to applied loads in the form of deflections, stresses and stains. The resilient modulus of asphalt concrete and of fine grained subgrade soil vary seasonally as a result of weather related elements such as temperature and rainfall. Knowing the expected variation of layer properties throughout the pavement’s service life will lead to more accurate pavement designs when analyzed with a mechanistic/empirical based design procedure. To study the variations in mechanical properties of the pavement layers due to environmental factors, nine recording stations were installed throughout Ohio to monitor asphalt, subgrade soil, and air temperature; subgrade soil degree of saturation; and rainfall under a research project entitled “Characterization of Ohio Subgrade Types”. The sites were selected to include statewide climatic variations and the most prevalent soil types (A-3, A-4, A-6, and A-7). One site was installed the fall of 1991. The remaining sites were installed the spring of 1992. The sites were monitored for a two and half year period under the initial project. Data retrieved from the stations with fine grained soil showed the degree of saturation for the most part was close to 100%, but varied from 80% to 100%. Further monitoring was needed to verify the initial observed trends in soil saturation and to improve initial developed relationships between air temperature and average pavement temperature.
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