In: Civil Engineering
a) The soil from a borrow pit is at a total density of 1.8 t/m3
and a water content of 12%. It is desired to construct a road
subgrade with a compacted total density of 2 t/m3 at a water
content of 17%. Determine the quantity of soil (dry mass in tonnes)
to be excavated from the barrow pit and the amount of water (in
litres) to be added for every 1 m3 of compacted soil in the
embankment. (Assume the specific gravity of soil is 2.65).
b) Explain the relative benefits of using stone mastic asphalt and
open graded asphalt in pavement.