Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 289, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.123048
Keywords
Consolidation; Alkoxysilanes; TEOS; PEG; Carbonate stones; Built heritage; Drilling resistance; Catalysis
Categories
Funding
- Fundacao para a Ciencia e Tecnologia (FCT) [PTDC/ECI-EGC/29006/2017]
- CERIS
- CQE [UIDB/00100/2020]
- Fundação para a Ciência e a Tecnologia [PTDC/ECI-EGC/29006/2017] Funding Source: FCT
Ask authors/readers for more resources
This study developed TEOS-based solutions modified with PEG for consolidating limestone, showing reduced cracking tendency, ability to provide cohesion, and enhanced cohesion potential. The results indicate the potential of these new products for consolidating carbonate stones with low incompatibility risks.
Despite many existing solutions and the research effort to produce tetraethyl-orthosilicate(TEOS)-based products with improved properties for the consolidation of carbonate stones in built heritage, there are still many open questions. Drawbacks such as the influence of the carbonate media and the tendency of the gel to crack during the drying-shrinking phase are well-known. This work addresses the development of new TEOS-based solutions modified with poly(ethylene glycol) (PEG) as organic modifier and the potential of their application for consolidation of limestone. The results demonstrate reduced cracking tendency in xerogels modified with PEG addition, ability to provide cohesion to calcite powder for a selection of formulations, and enhanced cohesion when applied to stone samples. Therefore, an initial set of products seems to present potential for consolidation of carbonate stones, displaying low degree of incompatibility risks that were initially assessed (e.g. negligible colour alteration, no formation of superficial 'crust', low alteration of stone porosity). (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available