ASTM-D7747 2011

$40.63

D7747-11 Standard Test Method for Determining Integrity of Seams Produced Using Thermo-Fusion Methods for Reinforced Geomembranes by the Strip Tensile Method

Published By	Publication Date	Number of Pages
ASTM	2011	6

Guaranteed Safe Checkout

Categories: 59.080.70 - Geotextiles, ASTM

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

1.1 This test method describes destructive quality control tests used to determine the integrity of thermo-fusion seams made with reinforced geomembranes. Test procedures are described for seam tests for peel and shear properties using strip specimens.

1.2 The types of thermal field and factory seaming techniques used to construct geomembrane seams include the following.

1.2.1 Hot Air This technique introduces high-temperature air between two geomembrane surfaces to facilitate melting. Pressure is applied to the top or bottom geomembrane, forcing together the two surfaces to form a continuous bond.

1.2.2 Hot Air This technique melts the two geomembrane surfaces to be seamed by running a hot metal wedge between them. Pressure is applied to the top and bottom geomembrane to form a continuous bond. Some seams of this kind are made with dual tracks separated by a non-bonded gap. These seams are sometimes referred to as dual hot wedge seams or double-track seams.

1.2.3 Extrusion This technique encompasses extruding molten resin between two geomembranes or at the edge of two overlapped geomembranes to effect a continuous bond.

1.2.4 Radio Frequency (RF) or Dielectric High frequency dielectric equipment is used to generate heat and pressure to form an overlap seam in factory fabrication.

1.2.5 Impulse Clamping bars heated by wires or a ribbon melts the sheets clamped between them. A cooling period while still clamped allows the polymer to solidify before being released.

1.3 The types of materials covered by this test method include, but are not limited to, reinforced geomembranes made from the following polymers.

1.3.1 Very Low Density Polyethylene (VLDPE).

1.3.2 Linear Low Density Polyethylene (LLDPE).

1.3.3 Flexible Polypropylene (fPP).

1.3.4 Polyvinyl Chloride (PVC).

1.3.5 Chlorosulfonated polyethylene (CSPE).

1.3.6 Ethylene Interpolymer Alloy (EIA).

1.4 Units The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Significance and Use
2	Apparatus Sample and Specimen Preparation Conditioning Procedure Calculation FIG. 1
3	Report Precision and Bias FIG. 2 FIG. 3
4	FIG. 4
5	FIG. 5

Additional information

Standard Title	D7747-11 Standard Test Method for Determining Integrity of Seams Produced Using Thermo-Fusion Methods for Reinforced Geomembranes by the Strip Tensile Method
Published Code	ASTM
Publication Date	2011
Pages Count	6
ICS Codes	59.080.70 - Geotextiles

Preview PDF


PDF Format	Searchable	Printable	Preview Now

ASTM-D7747 2011

PDF Catalog

Related products