Pozzolanic reactions of hydraulic lime mortar components

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00463888" target="_blank" >RIV/68378297:_____/16:00463888 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Pozzolanic reactions of hydraulic lime mortar components

Original language description

Historic lime mortars are a complex multicomponent system in which the mineralogical and chemical composition changes over time. With age, hydraulic phases are converted by carbonation process to calcium carbonate and reactive silicon and aluminium oxides. The consolidation of lime mortars is usually based on bringing Ca(OH)2 into its matrix so pozzolanic reactions may take place. The aim of this study was to explore the pozzolanic potential of sand and degraded binder particles on the development of hydraulic phases, which could contribute to the improvement of the mortars´ mechanical strength and, therefore, prolong its durability. For this purpose, pastes of mortar components with lime hydrate were prepared and stored in wet conditions (99 1% RH, 301°C) for 180 days and the products resulting from the pozzolanic reaction were studied at different agesnusing thermal analysis (TG/DTG) and X-ray diffraction (XRD). The pozzolanic reaction between metakaolin and calcium hydroxide in solution was also studied in terms of change of electric conductivity and pH. The results obtained indicate that the pozzolanic reactivity of historic mortars’ components can be potentiated by supplying calcium hydroxide to its structure. The resulting pozzolanic products can contribute to the effective consolidation of mortars over long periods.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

AL - Art, architecture, cultural heritage

OECD FORD branch

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Project

<a href="/en/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Cumulative time dependent processes in building materials and structures</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 4th Historic Mortars Conference - HMC2016

ISBN

978-960-99922-3-7

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

761-768

Publisher name

Laboratory of Building Materials Department of Civil Engineering Aristotle University of Thessaloniki

Place of publication

Thessaloniki

Event location

Santorini

Event date

Oct 10, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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