Hybrid nano-composites for the consolidation of earthen masonry.
Adobe
Calcium hydroxide
Calcium silicate hydrate
Consolidation
Earthen masonry
Heritage preservation
Hydroxypropyl cellulose
Nano-composites
Silica
Journal
Journal of colloid and interface science
ISSN: 1095-7103
Titre abrégé: J Colloid Interface Sci
Pays: United States
ID NLM: 0043125
Informations de publication
Date de publication:
15 Mar 2019
15 Mar 2019
Historique:
received:
13
11
2018
revised:
20
12
2018
accepted:
21
12
2018
pubmed:
6
1
2019
medline:
6
1
2019
entrez:
6
1
2019
Statut:
ppublish
Résumé
Earth is one of the oldest silicate-based materials in stone heritage, still largely used in architecture worldwide. Earthen materials are highly susceptible to wind and water erosion, leading to loss of cohesion and crumbling. Conventional consolidants (alkoxysilanes, synthetic or natural polymers) lack physico-chemical compatibility or effectiveness, and can promote degradation. We propose for the first time nano-composites for the surface consolidation of adobe, i.e. unbaked earth bricks often containing organic fibers and lime. We investigated, mimicking the setting of portland cement, the formation of calcium silicate hydrate (CSH) within adobe porosities, owing to the pozzolanic reaction between nanoparticles of silica and calcium hydroxide, to consolidate a powdery substrate. Different formulations were characterized by Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), dynamic light scattering (DLS), and turbidimetry (UV-Vis spectroscopy). A ternary composite made of SiO
Identifiants
pubmed: 30611046
pii: S0021-9797(18)31523-6
doi: 10.1016/j.jcis.2018.12.082
pii:
doi:
Types de publication
Journal Article
Langues
eng
Pagination
504-515Informations de copyright
Copyright © 2018 Elsevier Inc. All rights reserved.