I know of three types.
1. Waterborne paint: Lease expensive and usually used in temporary applications
2. Hot Thermo Plastic - more expensive but more durable than waterborne
3. Epoxy - Most durable and most expensive, usually used on concrete surfaces.
Hope that helps. Also you will...
Yes, the net pressure increase to be used at bot of ftg has overburden subtrafcted. Only the pressure additional to this will cause increase in stresses in soil layers below.
If you dont know it I would just forget about it. You cant learn that stuff in a couple of weeks. Omitting some areas should be part of your study strategy.
Correct. The wet and dry densities are easily related and you obtain the moist denisty from the proctor test and then calculate the corresponding dry density, which is obtained at a certain moisture content.
In the field water may be added to a material to increase mositure if it is too dry...