1. AASHTO M145 (2012) AASHTO soil classification systems. Standard specifications for transportation materials and methods of sampling and testing. AASHTO, Washington, DC
2. AASHTO T11 (2012) Materials finer than 75-μm (no. 200) sieve in mineral aggregates by washing. Standard specifications for transportation materials and methods of sampling and testing. AASHTO, Washington, DC
3. AASHTO T27 (2012) Sieve analysis of fine and coarse aggregates. Standard specifications for transportation materials and methods of sampling and testing. AASHTO, Washington, DC
4. AASHTO T96 (2012) Resistance to degradation of small-size coarse aggregate by abrasion and impact in the Los Angeles machine. Standard specifications for transportation materials and methods of sampling and testing. AASHTO, Washington, DC
5. AASHTO T193 (2003) Standard method of test for the California bearing ratio. AASHTO, Washington, DC