Civil Engineering MCQAE Level Civil Engineering
A geotextile used as a separator between subgrade and granular base in a road pavement prevents:
Soil MechanicsGeotextile FunctionsMEDIUM
Choose the correct answer
A
Settlements due to load
B
Migration of fine particles from subgrade into base course
C
Moisture movement upward
D
Frost heave only
Correct Answer
B. Migration of fine particles from subgrade into base course
Why is this the answer?
Geotextiles used as separators prevent intermixing/migration of fine subgrade soil particles into the coarser aggregate base layer. This maintains the drainage capacity and load-carrying performance of the base course.
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