For standard compaction test done on soil, the mass of hammer and drop of the hammer are:

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SSC JE CE Previous Year Paper 21 (Held on 25 September 2019 Morning)
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  1. 5.40 kg and 450 mm
  2. 2.60 kg and 310 mm
  3. 4.80 kg and 310 mm
  4. 2.60 kg and 450 mm

Answer (Detailed Solution Below)

Option 2 : 2.60 kg and 310 mm
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Detailed Solution

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The Indian Standard Equivalent of the Standard Proctor Test is called the light compaction test (IS: 2720 Part VII - 1974).

The Indian Standard Equivalent of the Modified Proctor Test is called the heavy compaction test (IS: 2720 Part VII - 1983).

In compaction test:

Property

IS light compaction test

IS Heavy Modified compaction test

 Weight of hammer 

2.6 kg

4.9 kg

Number of Layers

3

5

Number of blows

25

25

Hight of fall

310 mm

450 mm

Volume of mould

1000 cc

1000 cc

 

∴ Option 2 is more appropriate.

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