Composite Geomembrane

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Composite geomembrane

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Composite Geomembrane

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Composite Geomembrane Executive Standard: GB/T17642-2008

Product Introduction

Composite geomembrane is an impermeable material made of geotextile fabric and geomembrane, which is divided into one fabric and one membrane and two fabric and one membrane, with a width of 4-6m and a weight of 200-1500g/㎡, and has high physical and mechanical properties such as tensile, tear resistance and top breaking. It can meet the needs of civil engineering such as water conservancy, municipal, construction, transportation, subway, tunnel, etc., as well as the anti-fouling treatment of waste sites.

Product characteristics

● It has unique effects of heat preservation, moisture preservation, frost protection and frost protection.

Compared with the traditional cloth and membrane, the composite geomembrane can be used separately, which improves the use effect, saves the project time and reduces the project cost, and has obvious comprehensive benefits.

The width can be up to six meters, which reduces the seams compared with the narrow width of the same product, lowering the project cost and shortening the construction period, and also reducing the hidden problems caused by improper seam treatment.

● Water pressure resistance, corrosion resistance, high strength, abrasion resistance, low temperature resistance, non-toxicity, good plane drainage function, and excellent impermeability.

● Good anti-aging performance. Longer service life if buried laying is used.

Product use

● River dikes, lake dams, tailings dams, sewage dams and reservoirs, channels, liquid storage ponds (pits, Xieng Khouang)

● Anti-seepage lining of subways, basements, tunnels and tunnels.

● Roadbeds and other foundation salt seepage control.

● Horizontal impermeable cover in front of embankment and dam, vertical impermeable layer of foundation, construction cofferdam and waste site.

● Seawater and freshwater farms.

● Roadbed of highway, expressway and railroad; waterproof layer of swelling soil and wet sink loess.

Product specifications and performance parameters

Item			Indicators
Nominal fracture strength/(kN/m)			5	7.5	10	12	14	16	18	20
1	Longitudinal and transverse fracture strength/(kN/m) ≥		5.0	7.5	10.0	12.0	14.0	16.0	18.0	20.0
2	Longitudinal and transverse standard strength corresponding to elongation/%		30～100
3	CBR top breaking strength/kN ≥		1.1	1.5	1.9	2.2	2.5	2.8	3.0	3.2
4	Longitudinal and transverse tearing strength/kN ≥		0.15	0.25	0.32	0.40	0.48	0.56	0.62	0.70
5	Hydrostatic pressure resistance/MPa		According to Table 2
6	Peel strength/(N/cm) ≥		6
7	Vertical permeability coefficient/(cm/s)		As per design or contract requirements
8	Width deviation/%		-1.0
Note 1: the actual specifications (nominal breaking strength) between adjacent specifications in the table, according to the linear interpolation method to calculate the corresponding assessment indicators; beyond the scope of the table, the assessment indicators are determined by mutual agreement between supply and demand Note 2: Item 6, such as the measurement of specimens difficult to peel or not to the specified peel strength of the substrate or film fracture, to find the requirements for compliance
Item			Film thickness/mm
Item			0.2	0.3	0.4	0.5	0.6	0.7	0.8	1.0
Hydrostatic pressure resistance/MPa ≥		One cloth, one film	0.4	0.5	0.6	0.8	1.0	1.2	1.4	1.6
Hydrostatic pressure resistance/MPa ≥		Two cloths and one film	0.5	0.6	0.8	1.0	1.2	1.4	1.6	1.8
Note: Film thickness between adjacent specifications in the table, according to the linear interpolation method to calculate the corresponding assessment indicators; beyond the scope of the table, the assessment indicators are determined by mutual agreement between supply and demand