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Dam Liner (hdpe liner geomembrane for dam liners)

Dam Liner (hdpe liner geomembrane for dam liners) has the advantages of high anti-seepage performance, good durability, convenient and quick construction, economical and practical, and can effectively ensure the safety and stability of the dam. Geomembrane is widely used in dam engineering. It plays an important role in anti-seepage layer, anti-leakage layer and protective layer.

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PRODUCT DETAILS

Construction technology

Geomembrane paving is completed, should minimize walking on the membrane surface, moving tools, etc., where the geomembrane can cause harm to the object, should not be placed on the membrane or carry walking on the membrane, so as not to cause accidental damage to the membrane. When laying geomembrane, we should strive to weld less, under the premise of ensuring the quality of welding, and try to save raw materials. The lap width of the joints between the membrane and the membrane is generally not less than 10cm, and the weld seams are usually arranged parallel to the larger slope, i.e. along the direction of the slope.

Technical indicators

Ordinary high-density polyethylene geomembrane (GB/T 17643 2011 GH-1 type technical indicators)

Item	Indicator
Thickness m m	0.30	0.50	0.75	1.00	1.25	1.50	2.00	2.50	3.00
densities g/cm³	≥0.940
Tensile yield strength (longitudinal and transverse) N/mm	≥4	≥7	≥10	≥13	≥16	≥20	≥26	≥33	≥40
Tensile breaking strength (longitudinal and transverse) N/mm	≥6	≥10	≥15	≥20	≥25	≥30	≥40	≥50	≥60
Yield elongation (longitudinal and transverse) %				≥11
Elongation at break (longitudinal and transverse) %	≥600
Right angle tearing load (longitudinal and transverse) N	≥34	≥56	≥84	≥115	≥140	≥170	≥225	≥280	≥340
Puncture strength N	≥72	≥120	≥180	≥240	≥300	≥360	≥480	≥600	≥720
Carbon black content %	2.0-3.0
Carbon Black Dispersibility	No more than 1 out of 10 data at level 3, not allowed at levels 4 and 5
Atmospheric pressure oxidation induction time (OIT)min	≥60
Low temperature impact embrittlement properties	pass
water vapor permeability coefficient g ·cm/(cm2 · s ·Pa)	≤1.0×10-13
Dimensional stability %	±2.0

Environmental protection high-density polyethylene geomembrane "GB/T 17643-2011 GH-2S type technical indexes

Item	Indicator
thicknesses mm	0.75	1.00	1.25	1.50	2.00	2.50	3.00
Densities g/cm³	≥0.940
Tensile yield strength (longitudinal and transverse) N/mm	≥11	≥15	≥18	≥22	≥29	≥37	≥44
Tensile breaking strength (longitudinal and transverse) N/mm	≥20	≥27	≥33	≥40	≥53	≥67	≥80
Yield elongation (longitudinal and transverse) %	≥12
Elongation at break (longitudinal and transverse) %	≥700
Right angle tearing load (longitudinal and transverse) N	≥93	≥125	≥160	≥190	≥250	≥315	≥375
puncture strength N	≥240	≥320	≥400	≥480	≥640	≥800	≥960
Stress cracking under tensile load		≥300
Carbon black content %	2.0~3.0
Carbon Black Dispersibility	No more than 1 out of 10 data at level 3, not allowed at levels 4 and 5
Atmospheric pressure oxidation induction time (OIT)min	Atmospheric pressure oxidation induction time ≥ 100
Atmospheric pressure oxidation induction time (OIT)min	High pressure oxidation induction time ≥ 400
85°C heat aging %	≥55
anti-ultraviolet	≥50

Glossy HDPE geomembrane for landfill "CJ/T 234-2006 Technical Specification" (equivalent to US GRI-GM13 standard)

Item	Indicator
thicknesses mm	0.75	1.00	1.25	1.50	2.00	2.50	3.00
Densities g/cm³	≥0.939
Tensile yield strength (longitudinal and transverse) N/mm	≥11	≥15	≥18	≥22	≥29	≥37	≥44
Tensile breaking strength (longitudinal and transverse) N/mm	≥20	≥27	≥33	≥40	≥53	≥67	≥80
Yield elongation (longitudinal and transverse) %	≥12
Elongation at break (longitudinal and transverse) %	≥700
Right angle tearing load (longitudinal and transverse) N	≥93	≥125	≥156	≥187	≥249	≥311	≥374
puncture strength N	≥240	≥320	≥400	≥480	≥640	≥800	≥960
Resistant to environmental stress cracking	≥300
Carbon black content %	2.0~3.0
Carbon Black Dispersibility	No more than 1 out of 10 data at level 3, not allowed at levels 4 and 5
Atmospheric pressure oxidation induction time (OIT)min	Atmospheric pressure oxidation induction time ≥ 100
Atmospheric pressure oxidation induction time (OIT)min	High pressure oxidation induction time ≥ 400
85°C heat aging %	≥55
anti-ultraviolet	≥50