High density polyethylene geomembrane for landfills
1 Scope
This standard specifies the classification, requirements, test methods, test frequency, marking, labeling, packaging, transportation and storage of HDPE geomembrane for landfills.
This standard is applicable to the HDPE geomembrane produced by using medium (high) density polyethylene resin as the main raw material and adding various additives, which is used in seepage control and closure in landfills.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 1033 Test method for density and relative density of plastics
GB/T 1037 Test method for water vapor transmission of plastic film and sheet — Cup method
GB/T 1040 Plastics — Determination of tensile properties
GB/T 2918 Plastics — Standard atmospheres for conditioning and testing
GB/T 5470 Test method for brittleness temperature of plastics by impact
GB/T 6672 Plastics film and sheeting — Determination of thickness by mechanical scanning
GB/T 6673 Determination of length and width of plastics film and sheeting
GB/T 7141 Plastics — Methods of exposure to thermal air
GB/T 9352 Plastics — Compression moulding test specimens of thermoplastic materials
GB/T 11116 High density polyethylene resin
GB/T 12027 Plastics — film and sheeting — Determination of dimensional change on heating
GB/T 13021 Determination for the carbon black content of polyethylene pipes and fittings by calcination and pyrolysis
GB/T 15182 Linear low density polyethylene resin
GB/T 16422.3 Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV lamps
GB/T 17391 Test method for thermal stability of polyethylene pipes and fittings
QB/T 1130 Test method for right angle tearing property of plastics
3 Terms and definitions
3.1
geomembrane
waterproof barrier material using polymer as primary raw material, such as polyethylene (PE) geomembrane, polyvinyl chloride (PVC) geomembrane, chlorinated polyethylene (CPE) geomembrane and various composite geomembranes
3.2
high density polyethylene (HDPE) geomembrane
geomembrane made from medium (high) density polyethylene resin with a density of 0.94 g/cm3 or higher
3.3
smooth geomembrane
geomembrane with smooth and flat appearance on both sides
3.4
textured geomembrane
geomembrane manufactured by specific processes to present uniform coarse appearance on one side or both sides
3.5
tensile strength
maximum tensile stress (kN/m) per unit width applied on a specimen until it breaks during a tensile test
3.6
tensile break stress
tensile stress at break of a specimen
3.7
tensile yield stress
stress at the tensile stress-strain yield point
3.8
offset yield stress
stress generated when the stress-strain curve deviates from linearity and reaches a specified strain percentage (offset)
3.9
elongation at break
ratio of the increase of the distance between markings to the initial marked distance, at break under the action of tensile force, in percentage
3.10
tensile stress-strain curve
graph drawn through corresponding values of stress and strain; usually, the stress is considered as the ordinate and the strain value as the abscissa
4 Classification
4.1 Classification
4.1.1 Smooth high density polyethylene geomembrane, code-named HDPE1.
4.1.2 Textured high density polyethylene geomembrane, code-named HDPE2, of which single textured high density polyethylene geomembrane, code-named HDPE2-1; double textured high density polyethylene geomembrane, code-named HDPE2-2.
4.2 Model
