• Saturated-unsaturated soil behavior
  
• Stabilization of slopes
  
• Contaminated soils

Conferences:

1. Kulathilaka, A. Rajeevkaran, P. “Pullout resistance of soil nails in unsaturated residual soils”, 16th Asian Regional Conference on soil mechanics and Geotechnical Engineering, Taiwan, 2019.

2. Rajeevkaran, P. Kulathilaka, A. "Influence of matric suction on pullout resistance of soil nails", Proceedings of IESL 112th Annual Sessions 2018, Colombo, Sri Lanka,2018.

3. Rajeevkaran, P. Kulathilaka, A. "Influence of matric suction on pullout resistance of soil nails", International Roundtable on impacts of Extreme Natural Events- IRENE 2017, Sri Lanka, 2017.

• Associate Member of Institution of Engineers Sri Lanka (IESL)
• Member of Sri Lankan Geotechnical Society (SLGS)
• Associate Engineer, Engineering Council, Sri Lanka (ECSL)