Evaluation of Air-foam Stabilized Soil of Dredged Soil Waste as a Pavement Subgrade Layer

Air-foam stabilized soil is a kind of waste soil treated with cement and air-foam to make it durable and slight. It has been used widely in geotechnical applications; however, applying in subgrade layer of pavement has not considered. The purposes of this study are the followings: a) the strength properties based on the stress-strain behaviors, b) the durability by simulating the Freeze-Thaw Cycle (FTC), c) thermal conductivity test, and d) the evaluation of pavement performance when the air-foam stabilized soil was used as the subgrade layer. From the results of experiments, it is observed that the strength of air-foam stabilized soil increased with an increase in cement content, but decreased with increasing air-foam content or number of FTCs. The thermal conductivity of air-foam stabilized soil decreased with increasing air-foam content. The resilient modulus of air-foam stabilized soil was determined from the repeated load triaxial test to predict the fatigue and rutting life of the pavement according to American Association of State Highway and Transportation Officials (AASHTO) T 307. The testing results were compared with specification of the Korean pavement design life, and it showed that air-foam stabilized soil is suitable to be used as subgrade material to enhance its properties, and reduce damages such as fatigue cracking and rutting.

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  • English

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Filing Info

  • Accession Number: 01632941
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 7 2017 2:49PM