Which one of the following is an advantage when geo-textiles is used in road works?
(a) Prior stripping of the natural soil
(b) Economy of aggregate
(c) Increase of different settings
(d) Slower consolidation of fills
Ans. (b)
The most frequent role of geotextiles is road construction is as a separator between
the subgrade and subbase. This prevents the subgrade material from intruding into
sub-base due to repeated traffic loading. The savings in sub-base materials, which
would otherwise be lost due to mixing with the subgrade.