1. AASHTO T180 (2010) 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 Highway and Transportation Officials, Washington
2. Ameri M, Kalantari B, Jahandari S (2015) Laboratory study of determination of optimum amount of water and clay in mortar made with lime and fly ash. In: International conference on research in science and technology, Kualalumpur, Malaysia
3. ASTM D423–66 (1972) Standard method of test for liquid limit of soils. ASTM International West Conshohocken
4. ASTM D424–54 (1982) Standard method of test for plastic limit. ASTM International West Conshohocken
5. ASTM D422–63 (2002) Standard test method for particle-analysis of soils. ASTM International West Conshohocken