Water content–density criteria for determining geomembrane–fly ash interface shear strength

Typ: referat opublikowany w czasopiśmie

Autor

Zabielska-Adamska, Katarzyna

Wariant tytułu

polski

Kryterium zagęszczenia przy określeniu wytrzymałości międzyfazowej kontaktu popiół lotny–geomembrana

Data wydania

2019

Opublikowane w

MATEC Web of Conferences

Vol.

262

Abstrakt

angielski

The aim of the present paper was to determine shear strength at the interface between fly ash, as a material underlying artificial sealing layer of storage yards, and HDPE geomembranes. The fly ash was compacted at moisture contents ranging over optimum water contents ± 5% using the standard Proctor test. The shear strength and interaction tests were conducted in classic direct shear apparatus with a cylindrical shear box. For interface strength tests the bottom box frame was equipped with a polycarbonate platen, which enabled geomembrane fixing. The shear strength of the interface contact of fly ash–smooth HDPE geomembrane did not greatly depend on moisture at compaction; however, it was important for textured geomembrane. The lowest interface strength was obtained at the highest moisture w= wopt + 5%, and the greatest values at moistures w ≥ wopt, for both geomembranes.

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