Original title: Strengthening of weak historic renders with traditional and innovated consolidation treatment
Authors: Slížková, Zuzana ; Frankeová, Dita
Document type: Papers
Conference/Event: Engineering mechanics 2015 /21./, Svratka (CZ), 2015-05-11 / 2015-05-14
Year: 2015
Language: eng
Abstract: The presented study was aimed to proof consolidation effects of different families of consolidants: inorganic agents (lime -based or silica-based solutions or sols), organic agents (silicic acid ester based consolidant) and their combination on the characteristics of weak mortars prepared in laboratory with different types of aggregates. Besides exploring consolidant-substrate interaction also the pozzolanic activity of the aggregate and the binder mortar component after reaction with lime (calcium hydroxide solution) was investigated in order to understand and describe the strengthening mechanism into consolidated mortars. As the study was based on experimental research, the production of mortar test specimens represented an important preliminary work. Different mortar components (various types of sand in terms of phase composition, clay, lime) and the same ratio of the aggregate and the binder were used in various mortar mixtures. Various mineralogical types of aggregate were used with the same grain size distribution (600 pieces of tubes of 40 mm in outer diameter, of the height of 40 mm and depth of 4 mm were prepared for testing the compressive strength, for the tension tests 550 thin plates of dimensions 40 mm x 100 mm x 4 mm were cast and 600 beams 20 x 20 x100mm were made for testing the flexural strength and other characteristics of reference and consolidated mortars). The sand used for mortar specimens was characterized by microscopic examination of thin section and also by X-ray diffraction, X-ray fluorescence spectroscopy and thermal analysis. The pozzolanic activity of the sands (reactivity with calcium hydroxide) was determined by means of the thermal analysis and supplemented by wet silicate analysis. The amount of the effective matter in the consolidant was the same for all agents per the square unit for all mortar types and specimen shape. One set of specimens was prepared as the reference set the second set was used for the evaluation.
Keywords: consolidating products; consolidation; lime mortar; lime render; lime water; nanolime; strengthening
Project no.: DF11P01OVV012 (CEP)
Funding provider: GA MK
Host item entry: Engineering mechanics 2015. 21st International conference, May 11-14, 2015, Svratka, Czech Republic. Extended abstracts, ISBN 978-80-86246-42-0, ISSN 1805-8248
Note: Související webová stránka: http://1url.cz/18pc
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Original record: http://hdl.handle.net/11104/0246816

Permalink: http://www.nusl.cz/ntk/nusl-200855


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