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Asked a question 11 months ago

I need the formula to determine the total passes of the roller, As I have Roller weight and Layer thickness of Soil, Sub Base.

Where am I?

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Fasi Ur Rahman
Author at The Constructor

Hello Imran, 
To determine the total passes of the roller, the following formula can be used-
FDD=1.065 + 0.033 x Mc + 0.084 x Np
Where,
FDD- Required Field Dry Density
Mc- Mositure Content
Np- Number of Passes

Terms:
1. Maximum sub base thickness- 200mm
2. Minimum roller capacity- 8-10 tonne
3. Speed of roller < 5km/h

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