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(As Per IS 2720, Part 8-1983) : Proctors Compaction Test Purpose

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13 views4 pages

(As Per IS 2720, Part 8-1983) : Proctors Compaction Test Purpose

Uploaded by

pithampur.township
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PROCTORS COMPACTION TEST

(As per IS;2720, Part 8-1983)


Purpose:
For the determination of relation between water content and the dry density of
soils using heavy compaction.

Apparatus:
1. Cylindrical metal mould of 150mm dia and 2250cm3 volume.
2. Rammer of 4.89 kg weight. Steel straight edge, 37.5, 22.4,19 and 4.75 mm
sieve and mixing tools.

Procedure:
1.About 6kg of air-dried soil sample passing 37.5mm sieve shall be taken.
2. The sample shall be mixed thoroughly with a suitable amount of water
depending on the soil type. The mould shall be weighed.
3. Soil should compact in five layers; each layer being given 55 blows of
4.89kg rammer dropped from a height of 450mm above the soil.
4. The extension shall be removed and the compacted soil shall be leveled
off carefully to the top of the mould by means of the straight edge.
5. The mould and soil shall be weighed.
6. The compacted soil specimen shall be removed from the mould and
placed on the mixing tray. The water content shall be determined as per
IS: 2720, Part 2.
7. Suitable increments of water shall be added successively and above
procedure shall be repeated for each increment of water added.
The maximum dry density shall be corresponding to the maximum
point on the dry density/moisture content curve. The % moisture
content shall be corresponding to the maximum dry density on the
same curve.

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