This woven geotextiles are made to matrix by running the yarns in warp and weft direction forming open mesh matrix. The open area will vary according to the number of warp and weft yarn running in a specified area. The woven erosion control mats can be made out of either coconut coir yarn or high tensile bristle machine spun coir twine. The characteristics of these two grades of geotextiles are as follows:
Coir Yarn Geotextiles - high wet tensile strength and functional longevity of 2-4 years combined with heavier weight is suitable for use in steep slopes and in channels with high flow velocities and high shear stresses.
Coir Twine Geotextiles -due to its high tensile strength and functional longevity of 5-7 years, these mats can be used in very steep slopes and in channels and ditches with shear stresses up to 5 lbs./sq. ft(240n/m2). This type of blanket, which is referred to as turf reinforcement mat (trm), is an ideal substitute for 100% synthetic blankets.
The standard weighs of the coir yarn and coir twine woven geotextiles are 400grms, 700 grams and 900 grams per sqm.
Physical specification of the roll Width - 1 meter - 4 meter Length - 0.6 meter - 50 meter
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Coir yarn
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Coir twine
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CY 4 - 400 grams
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CT 4 - 400 grams
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CY 7 - 700 grams
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CT 7 - 700 grams
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CY 9 - 900 grams
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CT 9 - 900 grams
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Specification
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ASTM TEST
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400grm/sqm
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700grm/sqm
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900grm/sqm
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Weight/sqm
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ASTM d-3776
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460
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780
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980
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Tensile strength
dry
wet
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ASTM d-4632 ASTM d-4632
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59/54 lbs 38/40 lbs
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120/95 lbs 100/80 lbs
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159/95 lbs 138/79lbs
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Elongation at Failure
dry wet
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ASTM d-4632 ASTM d -4632
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38/29 % 33/30 %
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41/34 % 43/37 %
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33/34 % 40/40 %
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Open area
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CALCULATED
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65 1 inch
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48 3/4 inch
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38 1/2 inch
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