DURABILITY OF NATURAL FIBERS REINFORCED CALCIUM ALUMINATE CEMENT MATRICES

Author(s): I.L. J Fernández-Carrasco, J. Claramunt, M. Ardanuy
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference
on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE, Mohammed SONEBI and Karine CHARLET
ISBN:
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 474-478
Total Pages: 5
Language : English

Abstract: In this paper we describe a study of the durability of calcium aluminate cement (CAC) reinforced
with nano- and micro- cellulose fibers. The nanocelluloses were in the form of nanofibrillated
cellulose -obtained from sisal pulp by the application of a high intensity refining process- or as
nanocrystals –obtained from acid hydrolysis of pure microcellulose. The setting time (Vicat),
strength development (flexural strength), and durability to aging (wet/dry cycles and scanning
electron microscopy analysis) were studied. The results have show that the presence of fibers in
the matrices modifies the setting times towards reducing them; the mechanical behavior was
found better in the fiber CAC matrices compared with CAC mortars. Regarding the durability
tests, CAC cementitious systems keep intact the mechanical properties of the fibers. SEM
photographs of fracture section show the surface of the fibers with very little state of degradation.
These results would indicate that the absence of calcium hydroxide prevents the chemical
degradation of cellulose.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00