A geotextile used as a separator between subgrade and granular base in a road pavement prevents:
Choose the correct answer
Settlements due to load
Migration of fine particles from subgrade into base course
Moisture movement upward
Frost heave only
Correct Answer
B. Migration of fine particles from subgrade into base course
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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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