procurement of flood fighting materials (geo textile bag of type-b) for water resources department for the year 2025- 26 (zone a). , supply of geo bags type-b (size 2.00 m × 1.50 m inner to inner) (pillow type) made of composite layers of polypropylene (pp) fibre as per is 16653:2017 for nonwoven and is 16654:2017 for woven: woven geo-textile for the outer cover (300gsm): the woven geo textile is woven with multifilament woven fabric manufactured from ultra violet stabilized polypropylene. geo-textile used to manufacture geotextile bags should have high mechanical properties for enhanced durability along with enhanced puncture, abrasion and u.v. resistance characteristics. geo-textile should be inert to biological degradation and resistant to naturally encountered chemicals, alkalis, and acids. properties i. tensile strength (md) = 80 kn/m & tensile strength (cd) = 70 kn/m ii. elongation (md) = 25% & elongation (cd) = 25% iii. abrasion = 75% iv. trapezoidal tear strength (md) = 1500n & trapezoidal tear strength (cd) = 1300n v. cbr puncture strength = 900n vi. permeability = 18 l/m2/sec vii. aos = 250 micron viii. uv resistance @ 500 hours retained tensile strength (md) & (cd) = 80% ix. mass = 300 gm/m² x. seam strength = 50 % of actual fabric strength.non-woven geo-textile for the inner layer (300gsm): it is needle punched non-woven geo-textile made of 100% polypropylene staple fibres which are formed into a random network for dimensional stability. it should resist uv degradation, rotting and alkalis. properties i. wide tensile strength (md) = 15 kn/m & wide tensile strength (cd) = 15 kn/m ii. elongation (md) = 50% & elongation (cd) = 50% iii. abrasion = 95% iv. trapezoidal tear strength (md) = 340 n & trapezoidal tear strength (cd) = 340 n v. cbr puncture strength = 3000 n vi. permittivity = 1.25 s-1 vii. permeability = 60 l/m2/sec viii. aos = 75 micronix. uv resistance @ 500 hours retained tensile strength (md) & (cd) = 80% x. mass = 300 gm/m² xi. thickness at 2kpa = 3 mmxii. seam strength = 80 % of actual fabric strength. stitching of bags should be ring spun yarn stitches with 2500-3000 denier double line chain stitch with overlap with stitches along the edge. (bags are to be supplied of 15 numbers in a bundle, properly packed with each bag having proper tag with name of manufacturer, batch number, the gsm and type of polymer encrypted and stitched on top corner and each bag is to be marked with “wrd govt. of assam” to be printed distinctly. test certificate from approved nabl accredited and iso certified laboratory should invariably be submitted againsteach batch of material)