State whether the following are true or false. 1. For fine grained soils, if the

Question

State whether the following are true or false. 1. For fine grained soils, if the dry strength is low the soil will be silt. 2. Soil behaves as a semi-solid when the water content is between the shrinkage limit and the plastic limit. 3. A degree of saturation of 40% implies that 40% of the total volume is water. 4. For the same soil, the modified compaction test will give a higher maximum dry density and lower optimum water content than the standard Proctor test. 5. Sheepsfoot rollers are effective in compacting granular soils. 6. D_30 is greater than D_20 7. Compaction will decrease the volume of solid particles 8. Quartzite produces coarse-grained soils (sand and gravel). 9. Solution is a mechanical weathering process.

Explanation / Answer

1. True. For fine grained soils if dry strength is less, then the soils will silt and the have less bearing capacity.

2. True. according to the atterberberg chart soil behaves as semi solid.

3. False. 40% of saturation implies 40% of the water of total voids present.

4. True. It will give higher dry density for lower optimum water content.

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