GB/T 17642-2008 PDF in English
GB/T 17642-2008 (GB/T17642-2008, GBT 17642-2008, GBT17642-2008)
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Geosynthetics -- Geocomposites made of geononwoven and geomembrance
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| GB/T 17642-1998 | English | 319 |
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Geosynthetics--Geocomposites made of geononwoven and geomembrance
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Standards related to (historical): GB/T 17642-2008
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GB/T 17642-2008: PDF in English (GBT 17642-2008) GB/T 17642-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.70
W 59
Replacing GB/T 17642-1998
Geosynthetics - Geocomposites made of geononwoven and
geomembrance
土工合成材料 非织造布复合土工膜
ISSUED ON: AUGUST 06, 2008
IMPLEMENTED ON: JUNE 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Product classification, specification and code ... 6
4 Requirements ... 7
5 Test methods ... 8
6 Inspection rules ... 9
7 Packaging, storage and transportation, marks ... 10
Geosynthetics - Geocomposites made of geononwoven and
geomembrance
1 Scope
This Standard specifies the product classification, specification, code name, technical
requirements and quality assessment, test methods, inspection rules, packaging, marks,
storage and transportation of geocomposites made of geononwoven and geomembrance.
This Standard applies to geocomposites made of geononwoven and geomembrance that
use non-woven geotextiles as the base material and polyethylene, polyvinyl chloride as
the membrane materials.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments (excluding
corrigendum) or revisions do not apply to this Standard, however, parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable. For undated references, the latest edition of the referenced
document applies.
GB/T 4667, Textiles - Woven fabrics - Measurement of width of pieces (GB/T 4667-
1995, eqv ISO 3932:1976)
GB/T 13760, Geosynthetics - Sampling and preparation of test specimens (GB/T
13760-1992, eqv ISO 9862:1990)
GB/T 13761, Geotextiles - Determination of thickness (GB/T 13761-1992, eqv ISO
9863:1990)
GB/T 13762, Geotextiles - Determination of mass per unit area (GB/T 13762-1992,
eqv ISO 9864:1990)
GB/T 13763, Geosynthetics - Determination of trapezoid tearing force
GB/T 14800, Test method for determining the puncture resistance of geotextiles
GB/T 15788, Geotextiles and geotextile-related products - Wide-width tensile test
(GB/T 15788-2005, ISO 10319:1993, MOD)
GB/T 16422.1~16422.3, Plastics - Methods of exposure to laboratory light sources
GB/T 16989, Geotextiles - Tensile test for joints/seams by wide-width method (GB/T
16989-1997, neq ISO 10321:1992)
GB/T 17598, Geotextiles and geotextile-related products. Determination for
thickness of single layers of multilayer products
GB/T 17630, Geotextiles and geotextile-related products. Dynamic perforation test
(Cone-drop test)
GB/T 17631, Geotextiles and geotextile-related products - Test method for
determining the resistance to oxidation
GB/T 17632, Geotextiles and geotextile-related products. Test method for
determining the resistance to liquids of acids and bases
GB/T 17633, Geotextiles and geotextile-related products - Determination of water
flow capacity in their plane
GB/T 17635.1, Geotextiles and geotextile-related products. Determination of
friction characteristics. Part 1: Direct shear test
GB/T 17636, Geotextiles and geotextile-related products. Determination of abrasion
resistance. Sand paper/sliding block method
GB/T 17637, Geotextiles and geotextile-related products. Determination of the
tensile creep and creep rupture behaviour
GB/T 17638, Geosynthetics - Synthetic staple fibers needle punched nonwoven
geotextiles
GB/T 17639, Geosynthetics - Synthetic filament spun-bond and needle punched
nonwoven geotextiles
GB/T 17643, Geosynthetics - Polyethylene geomembrane
GB/T 19978, Geotextiles and geotextile-related products - Determination of the
puncture resistance
GB/T 19979.1, Geosynthetics - Penetration-resist property - Part 1: Determination
of static hydraulic pressure
GB/T 19979.2, Geosynthetics - Penetration-resist property - Part 2: Determination
of penetration coefficient
FZ/T 01010, Coated fabrics. Determination of coating peeling strength
3 Product classification, specification and code
3.1 Product classification
Geocomposites made of geononwoven and geomembrance can be classified according
to the following methods:
- According to substrate: staple fiber needle-punched geocomposites made of
geononwoven and geomembrance, filament spunbonded needle-punched
geocomposites made of geononwoven and geomembrance;
- According to the membrane material: polyethylene (PE), polyvinyl chloride (PVC),
chlorinated polyethylene (CPE) and other geocomposites made of geononwoven
and geomembrance;
- According to the structure: one-cloth-one-membrane, two-cloth-one-membrane,
one-cloth-two-membranes, two-cloth-two-membranes, multiple-cloth-multiple-
membranes and other geocomposites made of geononwoven and geomembrance.
3.2 Specification
The specifications of the geocomposites made of geononwoven and geomembrance are
expressed in terms of nominal breaking strength. Width, mass per unit area and
membrane thickness are auxiliary specifications, which are designed according to
contract regulations and actual needs.
The recommended series of product specifications are as follows:
Nominal strength (kN/m): 5.0, 7.5, 10, 12, 14, 16, 18, 20, etc.
3.3 Code
The code for geocomposites made of geononwoven and geomembrance is as follows:
(1) Substrate and layers. SN - Short-fiber needle-punched nonwoven geotextile
substrate; FN - Filament spunbonded needle-punched nonwoven geotextile
substrate; m is the number of substrate layers. When the number of layers is 1,
m can be omitted;
(2) Membrane material and number of layers: PE, PVC, CPE, etc.; n is the number
of membrane layers. When the number of layers is 1, n can be omitted;
(3) Nominal strength (kN/m);
5.4 Determination of breaking strength elongation: according to GB/T 15788.
5.5 Determination of tear strength: according to GB/T 13763.
5.6 Determination of CBR bursting strength: according to GB/T 14800.
5.7 Determination of dynamic perforation (falling cone): according to GB/T 17630.
5.8 Determination of friction coefficient: according to GB/T 17635.1.
5.9 Determination of in-plane water flow: according to GB/T 17633.
5.10 Determination of creep performance: according to GB/T 17637.
5.11 Determination of antioxidant performance: according to GB/T 17631.
5.12 Determination of acid and alkali resistance: according to GB/T 17632.
5.13 Determination of puncture strength: according to GB/T 19978.
5.14 Determination of peel strength: refer to FZ/T 01010; the width of the specimen is
50mm.
5.15 Determination of joint head/joint seam breaking strength: according to GB/T
16989.
5.16 Determination of UV resistance: according to GB/T 16422.1~16422.3. Usually
determine the strength retention rate before and after light. The test time can be selected
according to the needs.
5.17 Determination of hydrostatic pressure resistance: according to GB/T 19979.1.
5.18 Determination of permeability coefficient: according to GB/T 19979.2.
5.19 Determination of anti-wear performance: according to GB/T 17636.
5.20 Constant load elongation and constant elongation load: combining with the
determination of breaking strength and elongation according to GB/T 15788. During
the tensile test, measure the elongation when the specified load is reached and (or) the
strength value when the specified elongation is reached.
6 Inspection rules
6.1 Sampling
Products of the same variety and specification according to the delivery batch number
shall be regarded as inspection batches. Randomly select the corresponding number of
rolls from a batch of products according to the provisions in Table 4. Sample extraction
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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