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Soil Mechanics Test 5
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  • Question 1/6
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    If the initial and final void ratios of a clay sample in a consolidation test are 1.0 and 0.5 respectively. If the initial thickness of the sample is 5.0 cm, then its final thickness will be:
  • Question 2/6
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    In a standard proctor test 1.8 kg of moist soil was filled in the mould of 944 cc after compaction. A soil sample of 100 gm is taken and over-dried for 24 hours at a temperature of 110° C. The weight of the dry sample is 80 gms and the specific gravity of soil particles is 2.7. The theoretical maximum dry density that can be achieved at the given moisture condition is
  • Question 3/6
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    The dry density obtained at lab testing is 18 kN/m3. If the relative compaction is 0.75, the dry density obtained at the field is _______ (in kN/m3 up to 2 decimal places)
  • Question 4/6
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    The compaction of an embankment is carried out in 400 mm thick layers. A rammer is used for compaction that develop energy per drop of 40 kg m. Assume that the foot area of rammer is 0.05 m2 and there is an efficiency of 80% due to non-overlap of rammers, the number of passes required to develop compactive energy equivalent to IS light compaction test is
  • Question 5/6
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    The void ratio of a soil at an effective normal stress of 170 kPa is observed as 0.60, By reducing the void ratio to 0.45 there is a need to increase the normal stress to 210 kPa, coefficient of volume compressibility will be ________ × 10-3(up to two decimal places) in m2/kN .
  • Question 6/6
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    A layer of normally consolidated clay of thickness 1.5 m is undergoing one dimensional consolidation under a pressure increment of 30 kPa. If the final primary consolidation settlement (mm) by using Terzaghi’s theory is 20 mm, the initial effective stress within the soil layer will be ______ kN/m2. Assume the following soil properties:

    initial void ratio (e0) = 1.345.

    Compression index (Cc) = 0.40.

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