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The article presents conservation and restoration treatment of a number of textual records performed at the Book and Paper Conservation Centre of the Archives of the Republic of Slovenia. Created in the mid-19th century and currently kept by the Archives of the RS, the records in question (included in the fonds AS 31) were seriously damaged mostly due to years of inappropriate storage in the past, and their content could no longer be viewed. Having inspected their condition, a decision was made to restore them using our leaf casting machine, since manual restoration of such a large number of documents would be very time consuming. Conservation-restoration treatment has improved their condition and managed to prevent further deterioration. The content has once again been made available to our users, and with proper protection we also managed to extend the life expectancy of the documents. [ABSTRACT FROM AUTHOR]

The use of paper sludge as a hydraulic barrier material in landfills is a technology that has gained some attention since the early 1990s and is an innovative way to recycle paper mill residuals. The geotechnical properties of paper sludge are similar to those of compacted clays. A laboratory test has been performed to evaluate the suitability of Slovenian waste paper sludge as landfill covering or sealing material. The sludges obtained from Slovene paper mills were examined for their geomechanical, chemical and sealing properties, as well as for their microbiological stability. The results of preliminary geotechnical studies of paper sludges indicate the expected relatively low strength properties (14 kPa < σc < 81 kPa), high compressibility and a low coefficient of permeability 5.0* 10-10 < k < 7.8* 10-11. The pH values of the eluates are within the permissible limits 6.6-7.0. The strength properties of paper sludges and various composites of paper sludge can be improved by additives (fly ash, bentonite, cement) and various composites of different types of paper sludges. We improved the strength properties (273 kPa < σc < 1064 kPa) of these paper sludges, but the coefficient of permeability k also increased slightly. This paper also aims to evaluate the suitability of paper mill sludge collected from various Slovene paper mills for use as hydraulic barrier in landfill covers. [ABSTRACT FROM AUTHOR]