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

Author(s): B. Megna, D. Badagliacco, C. Sanfilippo, A. Valenza
Paper category: Proceedings
Book title: 3rd International Conference on Bio-Based Building Materials ICBBM 2019
Editor(s): Mohammed Sonebi and Sofiane Amziane
ISBN:
e-ISBN: 978-2-35158-229-9
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 352 - 356
Total Pages: 5
Language : English

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.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00