Geotechnical Engineering

DHARM

448 GEOTECHNICAL ENGINEERING

Determine the quanity of soil to be excavated from the barrow pit and the amount of water to be
added for every 100 m^3 of compacted soil in the embankment.
12.17 The following data are obtained in a compaction test.
Specific gravity = 2.65

Moisture content (%) 2 4.2 5.5 6.6 7.5 10

Wet density (kN/m^3 ) 20.2 20.8 21.7 22.0 22.1 22.0

Determine the OMC and maximum dry density. Draw ‘Zero-air-void line’.

(S.V.U.—Four year B.Tech. Dec., 1982)

12.18 The following results were obtained in a compaction test. Determine the optimum moisture

content and the maximum dry density.

Test No. 123456

Wet unit weight

(kN/m^3 ) 18.81 20.07 20.52 21.06 21.06 20.07

Water content (%) 7.4 9.7 10.5 11.5 13.1 14.4

Also find the air content at maximum dry density. (S.V.U.—B.E., (R.R.)—Dec., 1968)