Lifetime assessment of exposed PVC-P geomembranes installed on Italian dams

Life-Time Prediction for Polymer Materials

“…Meng Huang and Yuanxiang Zhou set up the space charge dynamics based model to predict the life-time of insulating polymers, for example, LDPE [59] as follows: where, L h is the life-time of material, N the trap density, K T the trapping coefficient (K T = 8.66.10 −5 s -1 ), K D the detrapping coefficient (K D = 1.32.10 −5 s -1 ), p c the critical released energy density rate, and U p the electromechanical energy.…”

“…From the data on plasticizer content, volume mass, water adsorption coefficient and water vapor permeability of poly(vinylchloride) (PVC) after natural testing, the life-time of PVC was predicted to be about 30 years [59].…”

Durability extension in PVC-P liners used for waterproofing irrigation reservoirs with lacquering technology

“…Alrededor de 1940 se empezaron a utilizar láminas de PVC plastificado (PVC-P) y otros polímeros como elemento impermeable en la construcción y renovación de obras hidráulicas [2]. Desde entonces el uso de dichos materiales, conocidos en la actualidad como geomembranas, se ha perfeccionado y tecnificado hasta convertirse en un elemento fundamental en las obras hidráulicas modernas, con infinidad de casos de éxito en los que las láminas llevan décadas en uso con un perfecto funcionamiento [3][4][5].…”

“…La degradación de las geomembranas utilizadas en la impermeabilización de balsas es un proceso que, si se trata de productos adecuadamente formulados, tiene lugar durante décadas hasta que el producto alcanza el final de su vida útil. Existe abundante bibliografía que recoge casos de éxito en los que las geomembranas han estado (o siguen estando) en uso después de 40 años [3][4][5].…”

Study on the durability of HDPE geomembranes applied to geotechnics and the environment using laboratory aged samples and in situ exhumed samples

“…Long-term performance of HDPE geomembranes depends on several aspects, such as field temperature, exposure conditions, field stresses, covered or protected conditions, kind of liner layers, and resin and additive formulations. Evaluation of the performance and the lifetime assessment of the geomembranes is important from a managerial point of view (CAZZUFFI and GIOFFRÈ, 2020). The service life of geomembranes can be predicted based on accelerated tests in the laboratory using Arrhenius modeling, which makes a timetemperature prediction and can be estimated from a few years to 1000 years (ROWE and SANGAM, 2002;ROWE, 2005;ZHANG, 2018;KOERNER and KOERNER, 2006;KOERNER et al, 1992).…”