(a) What types of soil, if properly compacted, would be “best” suited for use in
ID: 1714029 • Letter: #
Question
(a) What types of soil, if properly compacted, would be “best” suited for use in the low permeability “core” section and the low compressibility, strong “shell” section of an earth dam? (b) What compaction equipment would work “best” for each? (c) What type of soil would be best for constructing the base liner of a municipal solid-waste landfill and for the drainage layer that will be constructed above it? (d) Assuming that the base liner material has the compaction characteristics described by the test results of Problem 1, what would be reasonable compaction specifications for a 0.6 m thick base liner constructed using this soil?
Explanation / Answer
a ) Soft clay or a heavily remoulded ‘puddle’ clay for "core" section and coarser earthfill(or rockfill) for "shell" section.
b ) Smooth steel drum rollers (static or vibratory) or Pneumatic tyred rollers for "shell" section and for "core" section, sheepsfoot roller or vibrating sheepsfoot rammer or pad-foot vibratory roller.
c ) For base liner clay soils and for drainage layer sand or gravel.
d ) Test results of Problem 1 are not mentioned.
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