Six treatments of 50-mm-thick, 10% sloped applications of 1:1, 2:1, or
3:1 fly ash to sludge manufactured soil (Ecoloam(TM)) were evaluated
and compared to a seventh control treatment of recompacted soil to det
ermine infiltration and erosion properties. The greatest infiltration
occurred during the first rain, independent of Ecoloam treatment-time
averaged K-sat = 49.6 mm/h and SCS Curve Number, CN = 16. Infiltration
during rains 2 and 3 was reduced by 65% compared to rain 1 and was eq
ual to infiltration during rain 2 applied to the Control-K-sat = 18.1
mm/h; CN = 38. The slowest infiltration occurred during the third rain
to the Control-K-sat = 3.4 mm/h; CN = 53. Ecoloam erosion was depende
nt on the duration between when the Ecoloam was spread and the rain oc
curred. After removal of this time dependency, the Ecoloam was 3.9 tim
es more erodible than the control during the first rain; 1.8 to 2.5 ti
mes more erodible than the control during the second rain; and 0.2 to
0.4 times more erodible than the control during the third rain.