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Illinois Urban Manual
Material Specifications
594. HDPE AND LLDPE FLEXIBLE MEMBRANE LINER
1. SCOPE
This specification covers the quality of High Density Polyethylene (HDPE)
and Low Linear Density Polyethylene (LLDPE) flexible liner, seams, gaskets,
metal battens, embed channels, clamps, and sealant.
2. MATERIAL
Liner. The HDPE or LLDPE liner shall have a nominal
thickness of 30 mils, 40 mils, or 60 mils as specified. The liner shall be
manufactured to be suitable for use in either exposed or buried conditions.
It shall conform to the requirements of this specification as shown in
tables 594–1 through 594–4. It shall also meet the requirements of
Construction Specification 97 and the requirements shown on the drawings.
Gaskets, metal battens, clamps, embed channels, and sealant.
Gasket material shall be neoprene, closed cell medium, 0.25 inch thick, with
adhesive on one side, or other gasket material as approved by the liner
manufacturer. Metal battens shall be 0.25 inch thick by 2 inches wide
stainless steel. Clamps shall be 0.5-inch-wide stainless steel. Embed
channel shall have the same properties as the liner. Sealant shall be
General Electric Silicone, RTV 103, or equivalent.
3. HDPE AND LLDPE LINER PROPERTIES
The HDPE or LLDPE liner shall be manufactured from virgin polymer
material and shall meet the property values specified under tables 594–1
through 594–4 as applicable.
Table 594–1 Requirements for smooth HPDE liner
| Property |
Test Methods |
Requirements* |
| Nominal Thickness |
| 30 mil |
40 mil |
60 mil |
| Density, g/cc |
ASTM D 1505 |
0.940 |
0.940 |
0.940 |
| Tensile properties |
ASTM D 638 |
|
|
|
| yield stress, lb/in |
(type IV at 2 in/min) |
63 |
84 |
126 |
| break stress, lb/in |
|
114 |
152 |
228 |
| yield elongation, % |
|
12 |
12 |
12 |
| break elongation, % |
|
560 |
560 |
560 |
| Tear resistance, lb |
ASTM D 1004 |
21 |
28 |
42 |
| Puncture resistance, lb |
ASTM D 4833 |
54 |
72 |
108 |
| Carbon black content, % |
ASTM D 1603 |
2-3 |
2–3 |
2-3 |
| Carbon black dispersion |
ASTM D 5596 |
Cat 1–2 |
Cat 1–2 |
Cat 1–2 |
| Seam properties |
ASTM D 4437 (1 in wide at 2 in/min) |
|
| shear strength, lb/in |
|
60 |
80 |
120 |
| peel strength, lb/in** |
|
39/FTB |
52/FTB |
78/FTB |
* All values, unless specified otherwise, are minimum average roll
values as reported for the test method.
** Film tear bond: A failure of one of the bonded sheets by tearing
prior to complete separation in the bonded area. |
Table 594–2 Requirements for textured HDPE liner
| Property |
Test Methods |
Requirements* |
| Nominal Thickness |
| 30 mil |
40 mil |
60 mil |
| Density, g/cc |
ASTM D 1505 |
0.940 |
0.940 |
0.940 |
| Tensile Properties |
ASTM D 638 |
|
|
|
| yield stress, lb/in |
(type IV at 2 in/min) |
63 |
84 |
126 |
| break stress, lb/in |
|
45 |
60 |
90 |
| yield elongation, % |
|
12 |
12 |
12 |
| break elongation, % |
|
100 |
100 |
100 |
| Tear resistance, lb |
ASTM D 1004 |
21 |
28 |
42 |
| Puncture resistance, lb |
ASTM D 4833 |
45 |
60 |
90 |
| Carbon black content, % |
ASTM D 1603 |
2-3 |
2–3 |
2-3 |
| Carbon black dispersion |
ASTM D 5596 |
Cat 1–2 |
Cat 1–2 |
Cat 1–2 |
| Seam properties |
ASTM D 4437 (1 in wide at 2 in/min) |
|
| shear strength, lb/in |
|
60 |
80 |
120 |
| peel strength, lb/in ** |
|
39/FTB |
52/FTB |
78/FTB |
* All values, unless specified otherwise, are minimum average roll
values as reported by specified test methods.
** Film tear bond: A failure of one of the bonded sheets by tearing
prior to complete separation in the bonded area. |
Table 594–3 Requirements for smooth LLDPE liner
| Property |
Test Methods |
Requirements* |
| Nominal Thickness |
| 30 mil |
40 mil |
60 mil |
| Density, g/cc |
ASTM D 1505 |
0.915 |
0.915 |
0.915 |
| Tensile properties |
ASTM D 638 |
|
|
|
| yield stress, lb/in |
(type IV at 2 in/min) |
45 |
60 |
94 |
| break stress, lb/in |
|
128 |
170 |
255 |
| yield elongation, % |
|
13 |
13 |
13 |
| break elongation, % |
|
800 |
800 |
800 |
| Tear resistance, lb |
ASTM D 1004 |
17 |
22 |
33 |
| Puncture resistance, lb |
ASTM D 4833 |
51 |
68 |
102 |
| Carbon black content, % |
ASTM D 1603 |
2-3 |
2–3 |
2-3 |
| Carbon black dispersion |
ASTM D 5596 |
Cat 1–2 |
Cat 1–2 |
Cat 1–2 |
| Seam properties |
ASTM D 4437 (1 in wide at 2 in/min) |
|
| shear strength, lb/in |
|
44 |
58 |
90 |
| peel strength, lb/in |
|
37/FTB** |
50/FTB |
90/FTB |
* All values, unless otherwise specified, are minimum average roll
values as reported for each test method
** Film tear bond: A failure of one of the bonded sheets by tearing
prior to complete separation in the bonded area. |
Table 594–4 Requirements for textured LLDPE liner
| Property |
Test Methods |
Requirements* |
| Nominal Thickness |
| 30 mil |
40 mil |
60 mil |
| Density, g/cc |
ASTM D 1505 |
0.915 |
0.915 |
0.915 |
| Tensile properties |
ASTM D 638
(type IV at 2 in/min) |
|
|
|
| yield stress, lb/in |
|
44 |
58 |
87 |
| break stress, lb/in |
|
60 |
80 |
120 |
| yield elongation, % |
|
13 |
13 |
13 |
| break elongation, % |
|
350 |
350 |
350 |
| Tear resistance, lb |
ASTM D 1004 |
17 |
23 |
35 |
| Puncture resistance, lb |
ASTM D 4833 |
51 |
68 |
102 |
| Carbon black content, % |
ASTM D 1603 |
2-3 |
2–3 |
2-3 |
| Carbon black dispersion |
ASTM D 5596 |
Cat 1–2 |
Cat 1–2 |
Cat 1–2 |
| Seam properties |
ASTM D 4437 (1 in wide at 2 in/min) |
|
| shear strength, lb/in |
|
40 |
53 |
79 |
| peel strength, lb/in |
|
33/FTB** |
44/FTB |
66/FTB |
* All values, unless otherwise specified, are minimum average roll
values as reported for each test method
** Film tear bond: A failure of one of the bonded sheets by tearing
prior to complete separation in the bonded area. |
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