Question

An embankment is to be constructed using a sandy soil from a borrow pit. In a standard compaction test on a soil (grain specific gravity of 2.7) the following results were obtained:

Water content (%)	Y  kN/m3
6.2	16.9
8.1	18.7
9.8	19.5
11.5	20.5
12.3	20.4
13.2	20.1

The volume of the mould is 1000 cm³

1. Determine the maximum dry density obtainable under standard test conditions and the water content at which this occurs

2. Discuss the techniques of quality control for field compaction of a highway including the part played by these results

Answer 1