Abstract:
In this study, jute geotextiles have been used in two different applications related to
road construction.
In one application, open mesh type untreated geojute has been used to stabilize the
road slopes from raindrop erosion until the vegetations are established. Both
laboratory testing and field trial have been undertaken for this purpose. All the test
data and observations suggest that the geojute and vegetation system reduces the
surface runoff by 85% and reduces the eroded soil particles by 93% in comparison to
an exposed slope. The system is also eco-compatible and cost-competitive. But
periodic maintenance is necessary to get the desired result.
In another application, woven type treated DW Twill has been used for the purpose of
subgrade soil reinforcement of a flexible pavement. A systematic laboratory
investigation and field trial has been carried out. The test results show that the CBR
value increases by 1.5 times with the application of jute geotextiles in subgrade soil.
This finding has been used in design and construction of a segment of road following
the guideline practiced in Bangladesh. The study reveals that higher cost
competitiveness of jute geotextiles reinforced subgrade may be obtained for CBR
values less or equal to 2.0. Therefore, by ensuring adequate long term durability
through appropriate treatments already evolved, jute geotextiles may be envisaged as a
potential material for subgrade soil reinforcement applications.
