On the improvement of hygroscopic capacity of clay based materials

Author(s): Lorena F. Dutra, Anne-Cécile Grillet, Nathan Mendes, Monika Woloszyn
Paper category: Proceedings
Book title: Proceedings on International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Moisture in Materials and Structures
Editor(s): Kurt Kielsgaard Hansen, Carsten Rode and Lars-Olof Nilsson
ISBN: 978-2-35158-178-0
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 332 - 341
Total Pages: 10
Language : English

Abstract: This work intends to develop highly absorbing clay-based materials to potentially control indoor relative humidity, by adding hygroscopic components such as perlite and attapulgite to clay-based materials sintered at 800ºC. Dry-basis density, pore size and sorption kinetics were measured for all compositions. The practical moisture buffer value (MBV) was calculated for each composition considering diurnal relative humidity variations of 75% and 33%. It is verified that has a significant influence on hygroscopic properties of clay-based materials. Results have shown that perlite decreased the hygric performance of the clay but compositions based on attapulgite proved to be promising buffering materials due to the great improvement of the clay moisture buffer capacity.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00