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BS EN 12226:2012 pdf free download

BS EN 12226:2012 pdf free download.Geosynthetics – General tests for evaluation following durability testing.
BS EN 12226 specifies test methods for determining the change in specific properties of aged geosynthetics.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reterences, the latest edition of the referenced document (including any amendments) applies.
EN 12311 -1, Flexible sheets for waterproofing — Part 1: Bitumen sheets for roof waterproofing — Determination of tensile properties
EN 29073-3, Textiles — Test methods for nonwovens — Part 3: Determination of tensile strength and elongation
EN ISO 527-3, Plastics — Determination of tensile properties — Part 3: Test conditions for films and sheets (ISO 527-3)
EN ISO 527-4, Plastics — Determination of tensile properties — Part 4: Test conditions for isotropic and orthofropic fibre-reinforced plastic composites (ISO 527-4)
EN ISO 9862, Geosynthetics — Sampling and preparation of test specimens (iSO 9862)
EN ISO 10318, Geosynthefics — Terms and definitions (ISO 10318)
EN ISO 10319, Geosynthetics — Wide-width tensile test (ISO 10319)
EN ISO 13934-1, Textiles — Tensile properties of fabrics — Part 1: Determination of maximum force arid elongation at maximum force using the strip method (ISO 13934-1)
EN ISO 25619-2, Geosynthetics — DeterminatiOn of compression behaviour — Part 2: Determination of short- term compression behaviour (ISO 256 19-2)
ISO/TS 13434, Geosynthetics — Guidelines for the assessment of durability
3 Principle
The test specimens are exposed to a durability test for geosynthetics. The exposure is followed by visual and, it required. microscopic inspection and by determination of changes in tensile or compressive properties, as appropriate.
4 Specimens
4.1 Number of specimens
For each durability test the number of test and control specimens shall be a minimum of five, in both the machine and the cross-direction, unless the nature of the geosynthetic makes this inappropriate.
4.2 Sampling
Prepare specimens in accordance with EN ISO 9862. An overview of test methods, specimen sizes and test conditions per product type is given in Table 1.
For woven and knitted geotextiles (GTX.W and GTX-K), Cut pairs of test and control specimens at least 60 mm wide and 300 mm long containing the same yams or strips in the direction of test, i.e. adjacent along the shorter dimension. Count the number of these yarns or strips within 50 mm in the machine direction and in the cross machine direction. Record the numbers as n1 and n2 respectively.
For woven geotextiles remove threads in approximately equal numbers from each of the long edges of the cut strip until the width of the exposed and control specimens contains a number of threads identical to the corresponding numbers n, and n2. For machine and cross machine direction record separately the tensile strengths of the control specimens as F and of the exposed as Fe,. It required, record the strains at maximum load as tD and Le, respectively, “i indicating the number of specimen.
For nonwoven geotextiles (GTX-N), cut pairs of test and control specimens at least 50 mm wide and 300 mm long adjacent along the larger dimension.
For geogrids (GGR), cut specimens containing one or more complete ribs in width with a minimum of one junction — and preferably three junctions — in length. There shall be one junction at the centre of the specimen. GGR shall be tested according to EN ISO 10319, modified as necessary for one rib or more in width.
For geostrips (GST). cut specimens in full width and at least 300 mm long.
For geonets (GNT), geomats (GMA) and geospacers (GSP) cut pairs of test and control specimens at least 50 mm wide and at least 300 mm long adjacent along the larger dimension.
For geocomposites (GCO) consisting of more than one geosynthetic product, the components shall be individually tested for durability. It this is not feasible, a technical justification for an alternative testing approach shall be presented and reported.
For certain products, e.g. geospacers (GSP). tensile tests are not always applicable. For those products compression tests according to EN ISO 2561 9-2 shall be performed. A compression test specimen shall contain at least three load bearing elements in machine direction and in cross-machine direction. If this is not feasible, a technical justification for an alternative testing approach shall be presented and reported.
For geosynthetic barriers (GBR), components will only be separately tested if so specified in the relevant application standards.
Polymeric and bituminous geosynthetic barriers (GBR-P and GBR-B) shall be sampled as test plates in accordance with the relevant exposure test methods. Clay geosynthetic barriers (GBR.C) shall be sampled as geocomposite products.BS EN 12226 pdf free download.

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