Accelerated Investigation of Media Impact on Polyethylene Geomembranes

Geomembranes are applied in a wide range of engineering barrier systems, where among vari-ous complex impacts at least one property is in common, the requirement of extraordinary me-dia resistance (Scheirs 2009). Polyethylene with high density (PE-HD) shows a remarkable good resistance against various aggressive liquids, making it suitable for landfills, hazardous waste ponds and reservoirs. Physical and chemical aging of the material are commonly investi-gated by means of time-consuming immersion tests with subsequent tensile tests (Müller 2007). The present study deals with a new fracture mechanics characterization method combining cyclic tests with cracked round bars (CRB) and a special glass media cell for a defined environment.

A PE-HD grade for geomembrane applications in two different compounding, one carbon black filled and one natural material was investigated concerning physical and chemical aging. Cyclic Cracked Round Bar (CRB) tests were conducted on unexposed and ex-posed specimens in air and within environmental tests of unexposed specimens in a media cell. Additional immersion tests with subsequent tensile tests, Oxidation Induction Time (OIT) measurement and Infrared (IR)-spectroscopy were carried out. Films as well as a series of CRB specimens were exposed to a 10 % aqueous solution of Arkopal® N110 and a 20 % aqueous so-lution of sodium chloride. A reduction of the stiffness was found for both materials under the impact of both media. The environmental cyclic CRB tests in the media cell showed comparable results to the conventional methods.



Copyright: © Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben
Quelle: Depotech 2012 (November 2012)
Seiten: 2
Preis: € 1,00
Autor: A. Redhead
Dr. Andreas Frank
Univ.-Prof. Dr. Gerald Pinter

Artikel weiterleiten In den Warenkorb legen Artikel kommentieren


Diese Fachartikel könnten Sie auch interessieren:

Zero Waste – eine abfallwirtschaftliche Utopie?
© Witzenhausen-Institut für Abfall, Umwelt und Energie GmbH (5/2017)
Zero Waste – eine Gesellschaft völlig ohne Abfall – ist eine Utopie, die aktuell und in absehbarer Zeit nicht zu erreichen ist. Nur wenige Stoffströme (z. B. Glas, Metall) sind dauerhaft rezyklierbar. Viele andere Materialien – bekanntestes Beispiel ist das Papier – erfahren beim Recyclingprozess eine Qualitätsminderung, sodass früher oder später eine Ausschleusung und Entsorgung des Stoffstroms erfolgen muss. Zudem werden auch in Zukunft große Mengen gemischter Restabfälle anfallen, die stofflich nicht mehr nutzbar sind und der energetischen Verwertung zugeführt werden müssen. Alternative thermische Verfahren, die hochwertige Produkte aus dem Restabfall versprechen, konnten ihre Funktionalität in diesem Bereich bisher nicht nachweisen und sich daher nicht als Alternative zur MVA etablieren.

Waste Management in India and Experience with the Implementation of Projects Based on Public Private Partnership Model
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Decades of improper Municipal Solid Waste (MSW) Management has resulted in the creation of huge dumpsites in cities. These dumpsites are causing considerable environmental pollution and are full to capacity in most cities. Land for new disposal sites is not easily available due to increasing urbanization and population pressure. In many cases there is considerable protest from surrounding villages for setting up of a new MSW disposal site.

Overview of the Waste Management Situation and Planning in Greece
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Waste management has been recognized as one of the most pressing problems in Greece suffering of a low level of organization and relying predominantly on semi-controlled landfills until the end of the previous century [9]. Nevertheless improvements have been made during the last twenty years making the solid waste management in Greece a well-structured, organized and environmentally responsible activity with specific goals, mostly in the urban areas. However, there is a big need of changing the waste Management model. The development of efficient use of resources is the mean of realizing this vision. The transformation of the economy towards a resource-efficient direction will lead to increased competitiveness and new sources of growth and jobs through cost reduction through improved efficiency, commercialization of innovations and better management of resources throughout the duration of cycle life.

Wrong Tracks in Waste Management
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Waste Management is ubiquitous in our everyday life. Economic prosperity and the abundance of materialistic goods imply the generation of waste. In parallel the public awareness for environmentally sound solutions in the field of waste management is raising. This context imposes challenging conditions for political leaders. Often politicians are confronted to take decisions about concepts or investments in waste management without independent expertise. They are approached by vendors of waste treatment technologies or concepts, claiming high environmental and energetic performance, combined with profitable cost – benefit rates.

Initial Operating Experience with the New Polish Waste-to-Energy Plants
© TK Verlag - Fachverlag für Kreislaufwirtschaft (9/2016)
Waste-to-Energy plants are an integral part of modern municipal Waste Management Systems. Today recycling and energy recovery from waste are the only methods of dealing with municipal waste. This is demonstrated by Waste Management Systems in countries such as Germany, Sweden, the Netherlands, Belgium, Denmark and Austria, where the municipal waste management is limited solely to recycling and energy recovery from waste. The currently discussed concept of the latest circular economy package can hardly change anything in this matter. Poland, as one of the leaders among the new EU member states (since 2004), has still a lot to do within the scope of recycling and waste-to-energy.

Name:

Passwort:

 Angemeldet bleiben

Passwort vergessen?

Der ASK Wissenspool
 
Mit Klick auf die jüngste Ausgabe des Content -Partners zeigt sich das gesamte Angebot des Partners
 

Selbst Partner werden?
 
Dann interessiert Sie sicher das ASK win - win Prinzip:
 
ASK stellt kostenlos die Abwicklungs- und Marketingplattform - die Partner stellen den Content.
 
Umsätze werden im Verhältnis 30 zu 70 (70% für den Content Partner) geteilt.
 

Neu in ASK? Dann gleich registrieren und Vorteile nutzen...