Experimental Study on Frost Heaving Behavior of WFS-FA-EPS Fills

A cement treated fills was fomed by blending waste foundry sand (WFS),fly ash (FA),expandable polystyrene (EPS) beads,Portland cement and water in proportions. The effects of mixing ratios on the frost heaving deforrmtion of the fills have been studied. The results show that increase of EPS beads content or cement content can reduce the frost heaving deformation of the WFS-FA-EtX3 fills The single factor is changed in the experiment,the frost heaving ratio decrease close to linearity with the increase of the cement content ratio or the EPS beads content ratio, the frost heaving ratio increase close to linearity with the increase d the water content. The thermal conductMty of the fills close to first-order exponential decay with the increase of the EPS beads content ratio under normal temperature; The formed WFS-FA-EPS fills with the characteristics of low density, low thermal conductivity and resistance to frost heaving deformation, which can be used as frost-resistant materials in the roadbed engineering of cold region.