Effect evaluation of freeze-thaw on resilient modulus of unsaturated granular base course material in pavement. (December 2019)

• Record Type: Journal Article
• Authors: Ishikawa, Tatsuya; Lin, Tianshu; Kawabata, Shinichiro; Kameyama, Shuichi; Tokoro, Tetsuya
• Is Part Of: Transportation geotechnics. Volume 21(2019)
• Publication Date: 2019-12
• Subjects: Base course -- Resilient deformation characteristics -- Unsaturated soil -- Freeze-thaw action -- Laboratory element test; Engineering geology -- Periodicals; Soil mechanics -- Periodicals; Rock mechanics -- Periodicals; Transportation -- Periodicals; 624.15105
• DOI: 10.1016/j.trgeo.2019.100284
• Languages: English
• ISSNs: 2214-3912

Abstract

Abstract: This study examines the effects of freeze-thaw and water content on the resilient deformation characteristics of subbase course materials to evaluate the mechanical behavior of granular base in cold regions. A series of resilient modulus tests on subbase course materials under various water contents were conducted using a newly developed test apparatus. Besides, the test results were compared with the results of freeze-thaw CBR tests and the long-term field measurement at a model pavement structure including FWD tests. As the results, it was revealed that the resilient deformation characteristics of unbound granular base materials (UGBMs) deteriorate due to freeze-thaw and increment of the water content in thawing season. This indicates that the freeze-thaw of granular base has a strong influence on the fatigue life of pavement structures.