Question

The following data were recorded from a standard proctor compaction test. The
specific gravity of the soil grains is 2.8. The volume of the mould is 0.945 x 10-3
m
3
Mass (kg) 1,767 1,928 2.013 2.079 2.041 1.975
Water
content (%)
6 9 11 14 17 20

(i) Plot the compaction curve and determine the optimum water content and
maximum dry density.
(ii) Plot the zero air void curve.
(iii) If is proposed to achieve a relative compaction of 97% in the field, what is
the range of water content that would be allowed?
(iv) Determine the degree of saturation at the maximum dry density.

Answer 1

The graph, formulas used, table of calculation and calculation of other required values are shown below.