To preclude the possibility of erosion and piping in soils, the specification of protective filters to be adopted are _____ (where D15, D50 and D85 indicate particle sizes from the grain size distribution curve, f indicates the filter material and P indicates the protective material).
- AOption (a)
D15 (f)/D85 (P) < 5; D50 (f)/D50 (P) < 25
- BOption (b)
D15 (f)/D85 (P) > 5; D50 (f)/D50(P) > 25
- COption (c)
D15 (f)/D85 (P) > 5; D50 (f)/D50 (P) < 25
- DOption (d)
D15 (f)/D85 (P) < 5; D50 (f)/D50 (P) > 25
View answer & explanationHide answer & explanation
Correct answer
D15 (f)/D85 (P) < 5; D50 (f)/D50 (P) < 25