Performance of jute geotextile reinforced hydraulic filled subgrade

Abstract

In this study, DWF Cloth (plain) Jute Geotextile (JGT) has been used for the purpose of subgrade soil reinforcement of a flexible pavement in two different road segments to evaluate its performance. One road segment is in Hatirjheel project at Bagunbari, Dhaka, where woven type untreated DWF Cloth (plain) JGT has been used. Systematic laboratory investigation and field tests have been carried out. The field test result shows that the CBR value does not increase significantly due to use of JGT. It was observed that CBR value of hydraulic filled subgrade reached upto 8% or above after normal dumping from the truck, i.e. without any compaction effort. Another road segment has been selected at Keraniganj in Dhaka under R&H Department where the road embankment has been constructed by carried earth. To attain loose state of the field, the embankment was not compacted by any means. It was also observed that CBR value of subgrade reached to 5% without mechanical compaction. Systematic laboratory investigations and field tests have been carried out. The test result shows that the CBR value does not increase significantly due to use of JGT. Therefore, it has been observed that JGT over the hydraulic filled sandy subgrade of a flexible pavement will not be effective in increasing the CBR value of subgrade.