INFLUENCE OF CORK POWDER GRAINSIZE IN THERMAL AND MECHANICAL PROPERTIES OF CORK-NHL MORTARS

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cork is a unique material, characterized by small closed cell structures, high insulating properties, very low density, high fire resistance and a very good durability after simple thermal treatment. The main use of cork in the production of stopper and insulating panels obtained with cork grains and a polymeric resin. Usually cork grains used in panel production have a grainsize around 1-2 mm. In this work cork grains have been used as aggregates for natural hydraulic lime mortars by reducing grainsize distribution.Cork grainsize has been reduced by means of a knife mill and divided in three different distributions, i.e. 1, 0.5 and 0.25mm. Mortars have been prepared according to NHL to cork to natural sand volume ratio equal to 2:3:2.Three point bending and compression tests showed that reducing cork grainsize leads to a slight increase in mechanical performance. On the other hand thermal conductivity showed to be independent from cork grainsize.Scanning electron microscope investigation was also performed to better understand these results.
Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Bio-Based Building Materials
Pages334-338
Number of pages5
Publication statusPublished - 2019

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