Full scale landfill bottom liner test structures at Ämmässuo landfill, Espoo, Finland

Full scale test structures were constructed in sumemr 1996 to the Ämmässuo landfill to gather experience on quality control during the constructionand long term behviour of mineral liner and combination liners. Actual leachate was used to create the chemical loading and a hydraulic pressure of one meter. The leachate was implemented in October 1996, and the structures were monitored for two years. The structures were continously monitored by temperature and soil moisture sensors installed into the liner. The leachate seeping through the line structure was colledted to the lysimeter basins and further to the lusimeter wells, in which the amount of the water was measured automatically by pressure sensors. In addition, frost penetration and infiltrometer measurements were performed and samples were taken for laboratory tests during the two-year period. The structures were pulled down under control in November 1998.