Institutional Repository [SANDBOX]
Technical University of Crete
EN  |  EL

Search

Browse

My Space

A comparative study of porous limestones treated with silicon-based strengthening agents

Maravelaki Pagona, Kallithrakas-Kontos Nikolaos, Agioutantis Zacharias, Mavrigiannakis Stelios, Korakaki Dimitra

Simple record


URIhttp://purl.tuc.gr/dl/dias/AC517092-2D8F-4713-AA30-D0E03EEE4BDF-
Identifierhttps://doi.org/10.1016/j.porgcoat.2007.09.020-
Identifierhttps://www.sciencedirect.com/science/article/pii/S0300944007002196-
Languageen-
Extent12 pagesen
TitleA comparative study of porous limestones treated with silicon-based strengthening agentsen
CreatorMaravelaki Pagonaen
CreatorΜαραβελακη Παγωναel
CreatorKallithrakas-Kontos Nikolaosen
CreatorΚαλλιθρακας-Κοντος Νικολαοςel
CreatorAgioutantis Zachariasen
CreatorΑγιουταντης Ζαχαριαςel
CreatorMavrigiannakis Steliosen
CreatorΜαυριγιαννακης Στελιοςel
CreatorKorakaki Dimitraen
CreatorΚορακακη Δημητραel
PublisherElsevieren
DescriptionΔημοσίευση σε επιστημονικό περιοδικό el
Content SummaryPorous bioclastic limestones of small pore radii and sandy limestones of large pore radii were treated with silicon-based strengthening products, such as tetraethoxysilane, elastified silicic acid ethyl ester (PP), an aqueous colloidal dispersion of silica particles (LD), as well as an oligomeric siloxane water repellent (HP). Changes in color, water vapor permeability, porosity, pore size distribution and tensile strength were evaluated after treatment. Energy Dispersive X-ray Fluorescence (EDXRF) indicated that the products reached a depth from the surface of 30 mm and were evenly distributed inside the stone, except for LD, which accumulated up to the first 10 mm from the surface. Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM) showed that linkages created between limestone and gels, due to the hydroxyl groups of the quartz and aluminosilicate minerals included in the limestones. PP and LD reduced the water vapor permeability coefficient to acceptable limits and induced the least chromatic variation. Mercury intrusion porosimetry (MIP) results indicated that the precipitation of the formed gel increased the specific surface area. The porosity and pore size decreased in the treated bioclastic limestones and in the KS and LD treated sandy limestones. In contrast, the PP and PP + HP treated sandy limestones showed an increase in porosity and average pore radius, as a result of the polymer cracking. When polymers were applied to the sandy limestones of large pore radii, the formed gels underwent cracking from drying shrinkage and the mechanical resistance of the stone was reduced. The gels when deposited in the small pore radii of bioclastic limestones behaved as thin films, thereby no cracking was induced by the consolidant from drying shrinkage. This study demonstrated that the performance of a consolidant is greatly dependent on the pore size of the stone. None of the above studied products can be recommended for consolidation of the sandy limestones, while the elastified silicic acid ethyl ester (PP) is only recommended for consolidating the bioclastic limestones.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-10-07-
Date of Publication2008-
SubjectStrengthening agentsen
SubjectPorous limestonesen
SubjectPenetration depthen
SubjectEDXRFen
SubjectPore radiusen
SubjectElastified silicic acid ethyl esteren
Bibliographic CitationP. Maravelaki-Kalaitzaki, N. Kallithrakas-Kontos, Z. Agioutantis, S. Maurigiannakis and D. Korakaki, "A comparative study of porous limestones treated with silicon-based strengthening agents," Prog. Org. Coat., vol. 62, no. 1, pp. 49–60, Mar. 2008. doi: 10.1016/j.porgcoat.2007.09.020en

Services

Statistics