Drying of cement-based porous materials: a fractional kinetic appraoch

Author(s): Qiang Zeng, Dachuan Zheng, Baikun Chen
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: 54 - 63
Total Pages: 10
Language : English

Abstract: Moisture drying kinetics of a porous material is of significant importance for understanding interactions between water molecules and the solid substrate and evaluating transport properties of the material. In the present study, we measured moisture loss of cylindrical hardened cement pastes and mortars and interpreted the data via classic drying models and a fractional kinetic (FK) approach. The parameters of the FK model were featured to characterize the drying profiles. It showed excellent agreements between the measured data and the FK model in both the early and late drying periods, suggesting the complexity of the drying mechanisms of the cement-based porous materials. Extensive and exhaust tests are required to test the robust of the FK approach and extend its utilities in many fields of porous materials (e.g. microstructure characterization and moisture transport) in the future.

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