1. AASHTO-T99, 2010. Standard method of test for moisture-density relations of soils using a 2.5-kg (5.5-lb) rammer and a 305-mm (12-in.) drop. American Association of State and Highway Transportation Officials, USA, p. 12.
2. AASHTO-T103, 2012. Standard method of test for soundness of aggregates by freezing and thawing. American Association of State and Highway Transportation Officials, USA, p. 6.
3. AASHTO-T104, 2011. Standard method of test for soundess of aggregate by use of sodium sulfate or magnesium sulfate. American Association of State and Highway Transportation Officials, USA, p. 10.
4. AASHTO-T180, 2004. Standard method of test for moisture-density relations of soils using a 4.54-kg (10-lb) rammer and a 457-mm (18-in.) drop. American Association of State and Highway Transportation Officials, USA, p. 12.
5. AASHTO-T193, 2013. Standard method of test for the California Bearing Ratio. American Association of State and Highway Transportation Officials, USA, p. 11.