1. American Association of State Highway and Transportation Officials. (1999). Determining the resilient modulus of soils and aggregate materials (AASHTO T 307).
2. American Association of State Highway and Transportation Officials. (1999). 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 (AASHTO T 180).
3. American Society for Testing and Materials. (2006). Standard test method for resistance to degradation of small-size coarse aggregate by abrasion and impact in the Los Angeles machine (ASTM C 131).
4. American Society for Testing and Materials. (2011). Standard test methods for chemical analysis of limestone, quicklime, and hydrated lime (ASTM C 25).
5. American Society for Testing and Materials. (2015). Standard test method for relative density (specific gravity) and absorption of coarse aggregate (ASTM C 127).