Lightwieght material structure. Lower weight, countless advantages.
The woven coated design of BTL™ geomembranes results in an extremely light material structure.
In practice this means lower transportation costs, faster installation and huge prefabricated panels in one piece, up to several thousand square meters.
The following table compares the weight of BTL™ geomembranes and other liners.
High material strength. Outstanding performance even at entry level.
Even the thinner BTL™ geomembranes possess the strength of liners that several times thicker, at a much lower weight.
The following tables contain the tensile and burst strength of a few BTL™ geomembranes compared to other lining materials. The liners' laboratory tests were taken at the same conditions, using the same settings.
BTL™-40A and 45A: maximum performance. BTL™ geomembranes withstand the harshest conditions.
BTL™-40A and 45A are the strongest BTL™ geomembranes, still, their weight is only around the half of the 1.5 mm HDPE.
In addition, BTL™-40A and 45A geomembranes are flexible contrary to the 1.5 mm HPDE, have minimal heat contraction-expansion ratio and no to minimal waving at installation. They can be prefabricated into big panels up to 1 800 m2, keeping installation time, costs and risks to a minimum.
In the following you can find the comparison of BTL™-40A, 45A, and a 1.5 mm HDPE liner in a laboratory test, that shows the capabilities of BTL™ geomembranes translated to the language of numbers.
Tear resistance has a high priority when geomembranes are handled during the installation and when backfilled with soil and stones.
The laboratory tests of BTL™ geomembranes were done according to ASTM D5884-04a, while the HDPE geomembane was tested according to the ASTM D1004-3 standard.
When comparing BTL™-40A, 45A and 1.5 mm HDPE, tensile strength is also very important. Tensile properties are particularly significant when the design assumes plain-strain conditions. The tensile tests were done accroding to the ASTM D4885-01 (2011) standard.
Another significant property is the puncture resistance as stones, sticks or hard debris can puncture the geomembrane.
The puncture tests were done according to ASTM D4833 and ASTM D5514 (large scale hydrostatic puncture testing).
Tests results based on the ASTM D5514 standard show that no leakage, plastic deformation or pinholes occurred in neither the BTL™ or the HDPE materials.
Interface shear is critical for projects where side slope failures are a risk.
The interface shear tests of BTL™ geomembanes and the HDPE liner were carried out according to ASTM D5321.
As the results indicate BTL™-40A and BTL™-45A have superior shear properties than the examined HPDE liner, making them the ideal choice in - for example - large scale mining applications.