Geosynthetics in roads and pavements

SUBGRADE SEPARATION AND 

STABILIZATION 

 

Introduction to the Problem 

Temporary roads used for hauling and access 

roads that are subject to low volumes of traffic 

are often constructed without asphalt or cement 

concrete surfacing.  In these cases, a layer of 

aggregate is placed on the prepared subgrade of 

these roads to improve their load carrying 

capacity.  Problems are usually encountered 

when the subgrade consists of soft clays, silts 

and organic soils.  This type of subgrade is often 

unable to adequately support traffic loads and 

must be improved.