1. College of Construction Engineering, Jilin University, Changchun 130026, China; 2. Liaoning Jiaotong Investigation and Design Institute, Shenyang 110005, China

The results of physical mechanical tests, material components and structures of roadbed loess in Fuxin-Chaoyang highway of Liaoning show that Liaoxi loess is different from other areas’ in particle composition and chemical component, such as the contents of SiO₂ and Al₂O₃ are higher than other areas. The microstructures include bracket particles and macroporous micro-cemented structure, bracket particles and macroporous-inlay particles and microporous half-cemented structure, flocculated-cemented structure and clotted-cemented structure. The loess has preferable physical and mechanical properties: dry density is 1.15��1.76 g/cm³ , average content of natural water is 18.31% , c is 7.5��86.3 kPa, φ is 14.0��29.9 degree, etc., and the collap sible loessmainly belongs to medium-collapsibility.