The segregation of a sand-gravel dam filter of crushed rock and the influence of water content

Abbreviations: F0.063, fines content (<0.063mm) (%); F, mass passing (%); Ø, angle of inclined plane of segregation test setup (deg); αrep, angle of repose (deg); Dx, grain size at x % mass passing (mm); D15C, coarse sample at 15 % passing in segregation test (mm); D15F, fine sample at 15% passing in segregation test (mm); SR=D15C/ D15F, segregation ratio indicating segregation if >1 (...); W, water content (%); wopt, optimum water content (%); ρs, particle density (g/cm3); ρdry,max, maximum dry density (g/cm 3); Cu, coefficient of uniformity (Cu=D60/D10) (...) Nomenclature: fines amount, by weight, of soil finer than 0.063mm (European Standard) (%).