text: Three different samples of recycled glass with different gradation curves produced from residential and industrial waste glass streams in Victoria were studied in this research to investigate their usage as a construction material in geotechnical applications. The Fine Recycled Glass (FRG) and Medium recycled Glass (MRG) were classified well graded (SW-SM) while Coarse Recycled Glass (CRG) was classified poorly graded (GP)  according to Unified Soil Classifications System (USCS). Recycled glass specific gravity values were found to be approximately 10% lower than the values attributed to natural aggregate reported by Das (2007). 
  Results of standard and modified proctor compaction tests showed a higher maximum dry unit weight for MRG sample compared to FRG sample while the optimum water content of MRG was found to be lower than FRG sample.  LA abrasion tests proved that the abrasion resistance of FRG and MRG samples is close to those of construction and demolition material, whereas CRG showed a higher LA abrasion value. Post compaction gradation curve analysis of FRG and MRG samples proves their stability during engineering operations including handling, spreading and especially compacting. The CRG source consisted of a sizable amount of elongated and flat shaped particles and high debris content. It was also found that the CRG source possesses little ability to absorb and hold moisture which impacts on its compaction behavior. These characteristics along with perceptible change in gradation curves of the CRG samples after compaction, and its high segregation potential led the authors to conclude that CRG source is not an ideal material for geotechnical engineering applications. On the other hand, FRG and MRG samples proved appropriate characteristics close to those of natural aggregate within the same soil classification. 
  CBR tests indicate the superior shear resistance of MRG as compared to FRG. Direct shear test results indicate that the internal friction angle of MRG is slightly higher than those of FRG.  The internal friction angle values obtained for FRG and MRG samples through direct shear test are comparable to those of natural sand and gravel mixtures with angular  particles. Consolidated Drained CD triaxial shear test results confirmed the findings of direct shear tests.  By and large FRG and MRG samples showed the geotechnical engineering behavior of natural well graded sand and gravel mixtures. 
  Hydraulic conductivity tests showed that FRG and MRG samples have medium permeability with good drainage characteristics. TC and Assessment of Safety Level and Safety Performance (ASLP) proved that FRG and MRG samples comply with requirements issued by EPA Victoria for using aggregates as fill material. Results of this study advocate using recycled glass in a range of geotechnical engineering applications.