In geotechnical engineering applications, the method of joining of geotextiles by appropriate seam is one of the most important issues to deal with.
In order to optimize the rehabilitation costs and to increase the life of the geotextiles structure throughout the lay in the field, this study has been done on the geotextiles. Polypropylene nonwoven needle punched fabric and the thread material as same as the ground material i.e., polypropylene sewing thread of two different thread count (90 tex and 160 tex) and five stitches per inch 6-14 in steps of 2 are used as test variables with 401 two thread lock stitch which is used in factory seaming of geotextiles.
The experimental analysis was carried out to evaluate the performance of each sample with different test variables in order to find its permittivity, transmissivity, apparent opening size (AOS), interface friction (shear), sewn seam strength etc.,
A comparison has been made between the unseamed geotextiles with the seamed geotextiles with different test variables in all the test methods. From the results of the above tests, the stitch combination of 6 SPI (Stitch per minute) 90 Tex provides the better in-plane and cross plane permeability AOS, better shear behavior although it has lesser grab tensile and seam strength than the other test combinations. To read more,
The author of this article Mr. S. Karthiga is an M. Tech Scholar, Department of Textile Technology, Anna University, Chennai, India.