1. AASHTO
(1993). AASHTO Guide for Design of Pavement Structures American Association of State Highway and Transportation Officials.
2. ASTM D1556. Standard Test Method for Density and Unit Weight of Soil in Place by the Sand-Cone Method.
3. ASTM D1557. Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56 000 ft-lbf/ft 3 (2 700 kN-m/m 3 )).
4. ASTM D1883. Standard Test Method for CBR (California Bearing Ratio) of Laboratory-Compacted Soils.
5. ASTM D6938. Standard Test Method for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods.