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A Guide to Polymeric Geomembranes: A Practical Approach


Description: Geomembranes are flexible polymeric sheets which are used as relatively impermeable liners to contain liquid and vapour. With uses ranging from canal liners to hazard waste landfills, they are used extensively in a range of industries such as water conservation, mining, construction and waste management.

A Guide to Polymeric Geomembranes: A Practical Approach offers an informed overview of the developments in this field and includes:
- Detailed discussion of the major geomembrane types
- Manufacturing methods
- Key performance properties
- Industrial applications
- Testing and chemical resistance of geomembranes
- Failure analysis methodology

Written by a polymer research specialist with more than fifteen years experience in industry, this practical handbook covers the manufacture, use, installation, durability, lifespan and performance of geomembranes. It covers all the information required to enable the reader to select the most suitable geomembrane material for the job.

This book is a useful reference for engineers and professionals in industry, environmental consultants, polymer and materials scientists, and government agencies and policy makers. It is of particular interest to those designing, commissioning and operating waste management sites, landfills, mine leachate ponds and water containment facilities.

The book gives an overview of the geosynthetic polymers that comprise an important group of materials for lining landfills, mine leachate ponds and water containment facilities. The book starts with an introduction to geomembrane polymeric materials and their properties and manufacturing. The next sections describe the different types of materials such as High-Density Polyethylene (HDPE) as well as their properties, shortcomings and applications. Geomembrane survivability such as chemical exposure effects is also  discussed. The final chapters cover quality control and quality assurance and leak detection and leak surveys.


Contents: Series Preface.
Preface.

About the Author.

Acknowledgments.

1 Introduction to Polymeric Geomembranes.
1.1 Introduction.
1.2 Viscoelastic Behaviour.
1.3 Polymer Structure.
1.4 Molecular Weight.
1.5 Molecular Weight Distribution.
1.6 Crystallinity.
1.7 Properties of Polyethylenes.
1.8 Stress–Strain Behaviour of Polymers.
1.9 Melting Points.

2 Geomembrane Manufacturing Methods.
2.1 Blown Film (Round Die).
2.2 Flat Sheet Extrusion (Flat Die).
2.3 Coextrusion.
2.4 Calendering.
2.5 Spread Coating.
2.6 Extrusion Coated Geomembranes.
2.7 Pin-Hole Detection.
2.8 Texturing.
2.9 Additives for Geomembranes.

3 HDPE Geomembranes.
3.1 Introduction.
3.2 Structure–Property Relationships.
3.3 Comparison of HDPE Geomembranes with Other Geomembranes.
3.4 Durability and Survivability of HDPE.
3.5 Selection of Quality HDPE Geomembranes.
3.6 Common Failure Modes of HDPE Geomembranes.
3.7 Multilayer HDPE Geomembranes.
3.8 Fluorinated HDPE (F-HDPE).

4 Linear Low-Density Polyethylene Geomembranes.
4.1 Introduction.
4.2 Attributes of LLDPE Geomembranes.
4.3 Limitations of LLDPE Geomembranes.
4.4 Mechanical Properties.
4.5 LLDPE Geomembrane Resins.
4.6 Speciality Flexible Polyethylene Geomembranes.
4.7 Very Low-Density Polyethylene (VLDPE) Geomembranes.

5 Flexible Polypropylene (fPP) Geomembranes.
5.1 Introduction.
5.2 Attributes of fPP Geomembranes.
5.3 Shortcomings of fPP Geomembranes
5.4 Performance Propeties of fPP Geomembranes.
5.5 Applications.
5.6 fPP Field Failures.

6 CSPE Geomembranes.
6.1 Introduction.
6.2 Grades of Hypalon™.
6.3 Attributes of CSPE Geomembranes.
6.4 Limitations of CSPE Geomembranes.
6.5 General Properties of CSPE Geomembranes.
6.6 Comparisons of CSPE with Other Geomembranes.
6.7 Applications of CSPE Geomembranes.
6.8 Chemical Resistance of CSPE Geomembranes.

7 PVC Geomembranes.
7.1 Introduction.
7.2 Attributes of PVC Geomembranes.
7.3 Shortcomings of PVC.
7.4 Properties of PVC Geomembranes.
7.5 Failure Modes.
7.6 Formulation of PVC Geomembranes.

8 EIA Geomembranes.
8.1 Introduction.
8.2 Attributes of EIA-R Geomembranes.
8.3 Limitations of EIA-R Geomembranes.
8.4 Performance Properties of EIA-R Geomembranes.
8.5 Comparison of EIA-R (XR-5®) Versus CSPE-R (Hypalon™) Geomembranes.
8.6 Application Areas for EIA-R Geomembranes.

9 EPDM Geomembranes.
9.1 Introduction.
9.2 Attributes of EPDM Geomembranes.
9.3 Structure and Chemistry.
9.4 Mechanical Properties.
9.5 Advantages of EPDM over HDPE Geomembranes (Property Comparison).
9.6 Comparison between EPDM and PVC Geomembranes.
9.7 Seaming EPDM Geomembranes.
9.8 Applications.
9.9 Service Life.

10 Bituminous Geomembranes (BGMs).
10.1 Introduction.
10.2 Prefabricated Bitumen Membranes.
10.3 Composition and Construction.
10.4 Longevity of Bituminous Geomembranes.
10.5 Spray-in-Place Bitumen Membranes.
10.6 Design Life of Bituminous Geomembranes.

11 Specialty Geomembranes and Liners.
11.1 EVA Liners/Geomembranes.
11.2 Butyl Rubber Liners.
11.3 Nitrile Rubber Geomembranes.
11.4 Chlorinated Polyethylene (CPE).
11.5 Polyurethane (PU) Geomembranes.
11.6 Acrylic-Coated Geomembranes/Geotextile Composites.
11.7 PVDF Liners.
11.8 Chemical Vapour Barrier Membranes.

12 Key Performance Properties of Geomembranes.
12.1 Specific Gravity (Density).
12.2 Mass per Unit Area.
12.3 Thickness.
12.4 Melting Point.
12.5 Melt Flow Index.
12.6 Thermal Expansion.
12.7 Flexibility.
12.8 Conformability for Intimate Contact.
12.9 Ability to Resist/Accept Stress and Deformation.
12.10 Tensile Properties.
12.11 Puncture Resistance.
12.12 Tear Resistance.
12.13 Ply Adhesion of Reinforced Geomembranes.
12.14 Resistance to Stress Cracking.
12.15 Frictional Properties.
12.16 Low-Temperature Properties.
12.17 High-Temperature Capabilities.
12.18 Oxidative Resistance.
12.19 UV Resistance.
12.20 Permeability of Geomembranes.
12.21 Durability.
12.22 Application Specific Performance Properties.
12.23 Comparison of Performance Properties of Flexible Geomembranes.

13 Testing of Geomembranes.
13.1 Material Property Testing.
13.2 Measuring Thickness.
13.3 Density.
13.4 Mass per Unit Area.
13.5 Tensile Testing Methods.
13.6 Tear Testing.
13.7 Ply Adhesion.
13.8 Puncture Resistance.
13.9 Impact Resistance.
13.10 Environmental Stress Cracking.
13.11 Dimensional Stability.
13.12 Friction Angles.
13.13 Melt Flow Index (MFI).
13.14 Durability Testing.
13.15 Tests for Additives.
13.16 Carbonyl Index Measurements.
13.17 Chemical Resistance Testing.

14 Chemical Resistance of Geomembranes.
14.1 Chemical Resistance Tables.
14.2 Factors Affecting Chemical Resistance.
14.3 Effects of Chemicals on Geomembranes.
14.4 Chemical Resistance Testing.
14.5 Geomembrane Chemical Resistance by Chemical Class.
14.6 Geomembrane Chemical Resistance by Polymer Type.
14.7 Environmental Stress Cracking.

15 Failure Modes of Geomembranes.
15.1 Potential for Geomembrane Damage.
15.2 Failure of Installed Geomembranes.

16 Application Areas for Geomembranes.
16.1 Landfill Liners.
16.2 Landfill Caps/Covers.
16.3 Mining Applications.
16.4 Floating Covers.
16.5 Tank Liners.

17 Welding of Geomembranes.
17.1 Wedge Welding.
17.2 Hot Air Fusion Welding.
17.3 Extrusion Welding.
17.4 General Overview of Thermal Welding Methods.
17.5 Potential Thermal Welding Problems.
17.6 Defects that can Affect Weld Integrity.
17.7 Trial Welds and Field Welds.
17.8 Chemical Welding of Geomembranes.
17.9 General Welding Instructions for HDPE/LLDPE/fPP Geomembranes.
17.10 General Welding Instructions for PVC Geomembranes.

18 Geomembrane Weld Testing Methods.
18.1 Introduction to Weld Testing.
18.2 Visual Inspection of Welds.
18.3 Nondestructive Seam Tests.
18.4 Destructive Weld Tests.
18.5 Forensic Weld Examination.
18.6 Leak Location Testing.

19 Geomembrane Installation Factors.
19.1 Introduction.
19.2 Design Considerations.
19.3 Installation and Damage Considerations.

Appendix 1 Glossary.

Appendix 2 Geomembrane Test Methods.

American Society for Testing and Material.

Geomembrane (GM) Related Test Methods and Standards from GRI.

Geomembrane Testing Methods Conversion Table ASTM and ISO.

Index.


Author Dr. John Scheirs is a polymer research specialist with an emphasis on plastic recycling and pyrolysis of waste plastics into fuels. He serves as a consultant for Ozmotech Australia and has worked on the development of their Thermofuel process which can convert unwashed mixed plastics into low-sulfur diesel transportation fuel. He has studied the pyrolysis of HDPE, PP, PET and engineering plastics. John Scheirs is the author of the leading book on plastics recycling entitled Polymer Recycling: Science, Technology and Applications' published by Wiley in UK in 1998. He is also a member of the editorial board of the international journal 'Polymer Degradation and Stabilization'. John Scheirs is now the principal consultant with ExcelPlas Polymer Technology where he specializes in polymer recycling, polymer degradation, polymer processing and testing. He has worked on projects concerning the fracture, stress cracking, processing, characterization and recycling of styrenic polymers. John studied applied chemistry at the University of Melbourne (Australia) and has authored over 50 scientific papers, including encyclopedia chapters, and a number of books on polymer analysis and polymer recycling


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