Clarifying the nomenclature of Elvaloy-based geomembranes
A KEE molecular weight of 100,000 grams/mole is 250 times higher than currently required (400 grams/mole) by the FGI 1117 specification for PVC geomembranes. KEE is a solid-phase (polymeric) plasticizer, not liquid, which helps explain its high molecular weight and resistance to migration.
PVC Geomembranes for Environmental Containment | Layfield
Flexible Polyvinyl Chloride films (usually called PVC) have been used for geomembrane applications for over 60 years. PVC films are blends of rigid PVC (such as in PVC pipe) with softening agents called plasticizers.
PVC Geomembranes - Good, Better, Best | Environmental XPRT
EPT’s product offering in exposed geomembrane liners is our XTRM Ply PVC. For many years it was believed that PVC could not be used for 20-year exposed applications because the products available at the time did not have enhanced UV protection. Interestingly, PVC roofing with enhanced UV has been in use for over 30 years with great success.
Long-term durability assessment of PVC-P waterproofing
Currently, the most commonly used technology for tunnel waterproofing is plasticized polyvinyl chloride (PVC-P) geomembranes. However, not much is known about the long-term durability of...
Plasticizer Retention in PVC Geomembranes - ResearchGate
Plasticized PVC geomembranes have advantages over some other geomembranes, such as better resistance to differential settlement and puncture and significantly fewer field seams because PVC...
- What are PVC-P waterproofing geomembranes?
- Formualtion PVC-P waterproofing geomembranes are composed of 30–40% PVC resin and other additives ( Koerner, 2012), mainly plasticizers. Plasticizers are a group of more than 1000 different polymers used to change the behaviour of PVC from a rigid material to a semi-rigid or flexible one.
- How much plasticizer is in a geomembrane?
- Typically, the plasticizer content in geomembranes ranges from 25 to 35% in weight. Fillers (e.g. CaCO 3) added to the PVC resin may also account for 20–30% of the weight of the geomembrane. Fillers are used to reduce the price, but also to enhance the abrasion resistance and flame-retarding properties.
- What is PVC geomembrane?
- PVC geomembrane is a highly flexible thermoplastic waterproofing geomembrane manufactured from a mixture of vinyl compounds, plasticizers, and stabilizers. They are your answer if you need to cover your subgrade fast.
- Are PVC-P geomembranes degraded in underground application conditions?
- To analyse the long-term degradation of PVC-P geomembranes in underground application conditions, in this study, a specifically designed accelerated ageing device has been used for the tests. Furthermore, plasticizer absorption tests have been used to estimate the dependence of plasticizer loss on temperature and plasticizer content.
- Does plasticizer loss affect geomembranes in underground applications?
- In the hypothesis that plasticizer loss is the only degradation process relevant to geomembranes in underground applications, the loss of plasticizer can be evaluated through the loss of weight of the specimens. Accordingly, all the specimens were cleaned, dried in the desiccator for 72 h and weighed before testing.
- How does a PVC-P geomembrane aging device work?
- The device accelerates the ageing of the geomembrane in conditions similar to those in underground applications. Two commercial PVC-P geomembranes are tested, and mechanical tests are performed on the aged geomembranes to evaluate the effect of ageing on the properties of the material.
