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TEOS modified with nano-calcium oxalate and PDMS to protect concrete based cultural heritage buildings

Kapetanaki Kali, Vazgiouraki Eleftheria, Stefanakis Dimitrios, Fotiou Afroditi, Anyfantis George C., García-Lodeiro Ines, Blanco Varela, María Teresa, Arabatzis Ioannis, Maravelaki Pagona

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/6263855E-DA1F-4618-BC38-64AB89E35D6D-
Αναγνωριστικόhttps://doi.org/10.3389/fmats.2020.00016-
Αναγνωριστικόhttps://www.frontiersin.org/articles/10.3389/fmats.2020.00016/full-
Γλώσσαen-
Μέγεθος13 pagesen
Μέγεθος2,1 megabytesen
ΤίτλοςTEOS modified with nano-calcium oxalate and PDMS to protect concrete based cultural heritage buildingsen
ΔημιουργόςKapetanaki Kalien
ΔημιουργόςΚαπετανακη Καληel
ΔημιουργόςVazgiouraki Eleftheriaen
ΔημιουργόςΒαζγιουρακη Ελευθεριαel
ΔημιουργόςStefanakis Dimitriosen
ΔημιουργόςΣτεφανακης Δημητριοςel
ΔημιουργόςFotiou Afroditien
ΔημιουργόςΦωτιου Αφροδιτηel
ΔημιουργόςAnyfantis George C.en
ΔημιουργόςGarcía-Lodeiro Inesen
ΔημιουργόςBlanco Varela, María Teresaen
ΔημιουργόςArabatzis Ioannisen
ΔημιουργόςMaravelaki Pagonaen
ΔημιουργόςΜαραβελακη Παγωναel
ΕκδότηςFrontiers Mediaen
ΠερίληψηCultural Heritage constructions of twentieth century consist largely of mortar and concrete substrates. These concrete structures have suffered different types of decay processes. One of the most widely used consolidants is the Tetraethoxysilane (TEOS), which forms the basis of most existing commercial strengthening agents to protect porous building materials against deterioration. A novel, non-toxic strengthening and protective agent for mortar and concrete substrates was synthesized in a one-pot sol-gel procedure, incorporating in TEOS, Polydimethyl siloxane (PDMS), and nanoparticles of synthesized calcium oxalate (CaOx). PDMS provided hydrophobicity and reduced surface tension that causes cracks on the surface of produced xerogel. The synthesized nanocomposite both in sol and xerogel form was assessed with a variety of analytical techniques (FTIR, XRF, SEM, Optical Microscopy, Dynamic Light Scattering, Thermogravimetric analysis). The excellent physical properties of the produced colloidal solution of the nanocomposite, such as low viscosity and density, allow a penetration up to 2 cm from the surface in the treated cement mortars. This involved improvement of the mechanical and physical properties, such as the dynamic modulus of elasticity and increased water repellency. The treated cement mortars exhibited well-preserved aesthetic surface parameters and significant maintenance of the treatment. Furthermore, no harmful byproducts were identified indicating the nanocomposite compatibility to the siliceous and carbonate nature of the treated cement mortars.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2021-09-17-
Ημερομηνία Δημοσίευσης2020-
Θεματική ΚατηγορίαPDMS-TEOS-nano-calcium oxalate nanocompositeen
Θεματική ΚατηγορίαConcrete conservationen
Θεματική ΚατηγορίαHydrophobic consolidanten
Θεματική ΚατηγορίαCompatibleen
Θεματική ΚατηγορίαCultural heritage conservationen
Βιβλιογραφική ΑναφοράK. Kapetanaki, E. Vazgiouraki, D. Stefanakis, A. Fotiou, G. C. Anyfantis, I. García-Lodeiro, M. T. Blanco-Varela, I. Arabatzis, and P. N. Maravelaki, “TEOS modified with nano-calcium oxalate and PDMS to protect concrete based cultural heritage buildings,” Front. Mater., vol. 7, Feb. 2020. doi: 10.3389/fmats.2020.00016en

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