(1) Methodology; (2) Fine-grained tills; (3) Binders; (4) Stabilisation - modification; (5) Laboratory- and field tests; ( 6) Results and discussion; Appendices: (1) Evaluation of binder quantity by statistical methods; (2) Central Composite Design (CCD); (3) Box-Behnken Design (BBD); (4) Evaluation of binder type; (5) Simplex design