engleski

Large Oedometer for Measuring Stiffness of MBT Waste

One of the benefits of the mechanical and biological waste treatment (MBT) is increased stiffness with respect to the fresh “raw” waste material. Commercially available oedometers typically have a cell diameter from 75 to 254 mm, which is not sufficient specimen size for testing the compressibility behavior of waste materials. Based on the above mentioned consideration, the manufacturing of large oedometer of 500 mm internal diameter started at the Faculty of Geotechnical Engineering, University of Zagreb, in September 2008. The quality, durability and performance evaluation of the large oedometer has been made by comparison of five stress-strain curves obtained experimentally with stress-strain curves published by other researchers. In addition, obtained results have been compared to the stress-strain curves related to the fresh and decomposed untreated waste material and to the so- called “bioreactor” waste material. Comparison of results confirmed a reliable behavior of designed oedometer as well as the fact that treatment of fresh “raw” waste material can lead to a stiffer “soil-like” material.

compression test ; deformation ; landfills ; settlement ; waste stifness

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