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Geomat TDDGM-EXTRAMAT (“TDDGM” means “a three-dimensional drainage geomat”) is made of geomat TDM and one or two layers of a nonwoven synthetic fabric by cross-linking, adhesive bonding and thermal bonding. Three-dimensional drainage geomats (TDDGM) are three-dimensional mats TDM with an additional structural element – a nonwoven fabric on one (TDDGM1) or both (TDDGM2) sides of the geomat.
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Three-dimensional mats of the TDDGM type are intended for reinforcement of drainage constructions and waterways. They may be used in building of industrial and domestic waste disposal sites being the lower layer as drainage and in constructions of safety screens on the surface.
Physical-Mechanical Indices
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TDDGM1-15(300)-EXTRAMAT
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TDDGM2-15(300)-EXTRAMAT
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Mass-area ratio, not less than, g/m2
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470
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590
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Thickness (height), mm
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13 ± 2
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15 ± 2
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Longitudinal strength (not less than), kN/m
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7
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10
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Lateral strength (not less than), kN/m
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5
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8
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Breaking extension, %
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60
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25
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Roll width, cm
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300
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300
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Coil length, m
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50
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50
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Tensile strength loss allowance after 25 freeze-thaw cycles (not more than), %
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10
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10
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