Validation of Procedures for Pavement Design on Expansive Soils
Final rept. May 1984-Aug 1985
NEW MEXICO ENGINEERING RESEARCH INST ALBUQUERQUE
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This report documents site investigations and design recommendations for airport pavements on expansive soils at three sites. The methods used were developed previously in an FAA-sponsored research project. The design procedure involves soil characterization, determination of surface characteristics and evaluation of soil-pavement interaction. Investigations at three airports are reported they are Murdo, South Dakota, Mesquite, Texas, and Love Field, Dallas, Texas. Soils data are used along with climatic information to obtain estimates of the equivalent thickness of pavement required for each site. The work at Love Field was somewhat different than the other sites since NMERI Was not directly conducting the investigation. Results are reported in the form of pavement thickness required to adequately perform, in terms of surface roughness, on the soil surface characteristics predicted fo reach site. Recommendations are included for consideration in rehabilitation of each site since all were experiencing surface roughness at the time of the investigations. These results confirm that methods developed for evaluating airport pavements on expansive soils provide useful information for pavement design. This method specifically addresses the expansive soil problem and does not address the effects of traffic or load-induced pavement distress. These aspects are believed to be adequately covered in standard FAA design procedures. Keywords Thermocouple psychrometer Roughness Filter paper.
- Soil Mechanics
- Civil Engineering