Characteristics of modified soil-aggregate system and their application in pavements

초록

Modification techniques that involve mixing geomaterials with stabilizers in road foundations have been widely used to improve the performance of pavement and to reduce its thickness. However, these techniques have been empirically applied in the field, but have not been quantitatively established for design criteria. The characteristics of various modified mixtures and their applications in pavement structure are evaluated. Fundamental mechanical experiments, including unconfined compressive tests and repeated load resilient modulus-deformation tests were conducted on coarse-grained subgrades soils mixed with various types and amounts of stabilizer, in order to investigate the strength and deformation characteristics of modified soil mixtures. Then, a parametric study was conducted to evaluate the performance of each modified mixture used in pavement structure through finite element method with a nonlinear stress-dependent soil model.

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