1. Laboratory study of properties of rubber-soils;Ahmed,1993
2. Standard test method for direct shear test of soils under consolidated drained conditions;ASTM D3080-94,2011
3. Standard test method for maximum index density and unit weight of soils using vibratory table;ASTM D4253-16,2016
4. Standard test method for minimum index density and unit weight of soils and calculation of relative density;ASTM D4254-16,2016
5. Standard practice for use of scrap tires in civil engineering applications;ASTM D6270-08,2012