Question: Q 7 : A proposed grading plan requires 2 2 3 , 1 2 0 m 3 of cut and 2 0 6 , 6

7

: A proposed grading plan requires

223, 120 m^{3}

of cut and

206, 670 m^{3}

of fill. Laboratory tests on a series of undisturbed samples from the cut area produced the following results:

A series of modified Proctor tests on representative bulk samples produced a maximum dry unit weight of

19.2 k \frac{N}{m^{3}}

and an optimum moisture content of

10.2 % .

The project specifications require a relative compaction based on the modified Proctor test of at least

90 % .

Determine the shrinkage factor and compute the required volume of import or export, if any. Use the dry unit weight of the cut when computing any import or export quantities. The shrink fctor of a material is used to calculate the decrease in volume from bank to compacted state.

Determine the weight of any import or export soil, assuming it has a moisture content equal to the average moisture content in the cut. Express your answer in metric tons

(1

metric ton

= 1000 k g = 1 M g) .

\

table

[[

Sample No

., \

table

[[

Dry Unit Weight

], [(k \frac{N}{m^{3}})

Q 7 : A proposed grading plan requires 2 2 3 , 1

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