ENGINEERING PROPERTIES OF SOIL FROM IKOT UDUAK GULLY SITE

Filters have been used in earth structures such as retaining walls, earth dams, etc. to prevent the loss of particles induced by seepage of water. Traditionally, granular filter materials are used, however, they are becoming more difficult to obtain and transpert to the construction site and transportation of granular materials rise the cost of construction and carbon footprints of the project. Therefore, the neod for an alternative filter material arises, and geotextiles can be considered as one of the best options. The experimental investigation was conducted in the laboratory to evaluate the gradient ratio test method for steady unidirectional flow through nonwoven geotextile. Tests were performed according to specification of ASTMD5101. It has been found that the stabilization in the permeability of system was greatest and fastest for he geotextile that had small opening area, and amount of loss of fines was detected in the case of having larger opening size and thinner geotextile system. Furthermore, using two layers of geotextile in the system showed better filtration performance. The filtration performance of the geotextile was affected by the compaction state of the base soil. The denser compaction of clay positively affected the filtration performance. Finally, the system was analyzed in three zones of permeameter. It is observed that the system permeability behaviour was very similar to permeability of soil layer next to geotextile. The results of this study are believed to help further understand the use of non-woven geotextile in gully remediation as filter maternal Keywords: Remediation, Filter, Granular, Non-woven geotextiles