Determination of the pozzolanic activity of mortar’s components by thermal analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00458191" target="_blank" >RIV/68378297:_____/16:00458191 - isvavai.cz</a>

Výsledek na webu

<a href="http://link.springer.com/article/10.1007/s10973-016-5360-7" target="_blank" >http://link.springer.com/article/10.1007/s10973-016-5360-7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-016-5360-7" target="_blank" >10.1007/s10973-016-5360-7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Determination of the pozzolanic activity of mortar’s components by thermal analysis

Popis výsledku v původním jazyce

Historic lime mortars are complex multicomponent system whose 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 the dotation of the Ca(OH)2 into its matter so pozzolanic reaction may possiblyntake place. The study was aimed to explore pozzolanic potential of sand grains and degraded binder with respect to renewal of hydraulic phases which could contribute to mortar’s mechanical strength and therefore prolong its durability. For this purpose, pastes of mortar components with lime hydrate were prepared and stored in wet conditions (RH = 99 1 %, T = 30 1 C) for 180 days. Pozzolanic reaction products were studied atdifferent ages using thermal analysis and X-ray diffraction. With respect to sand grains pozzolanic activity, both methods confirmed the presence of newly formed monocarboaluminate as an only hydraulic phase; moreover, CSH and hydrocalumite have been found in degraded binder pastes. CSH, stratlingite and monocarboaluminate werendetected as products of pozzolanic reaction of silicate and metakaolin with calcium hydroxide.

Název v anglickém jazyce

Determination of the pozzolanic activity of mortar’s components by thermal analysis

Popis výsledku anglicky

Historic lime mortars are complex multicomponent system whose 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 the dotation of the Ca(OH)2 into its matter so pozzolanic reaction may possiblyntake place. The study was aimed to explore pozzolanic potential of sand grains and degraded binder with respect to renewal of hydraulic phases which could contribute to mortar’s mechanical strength and therefore prolong its durability. For this purpose, pastes of mortar components with lime hydrate were prepared and stored in wet conditions (RH = 99 1 %, T = 30 1 C) for 180 days. Pozzolanic reaction products were studied atdifferent ages using thermal analysis and X-ray diffraction. With respect to sand grains pozzolanic activity, both methods confirmed the presence of newly formed monocarboaluminate as an only hydraulic phase; moreover, CSH and hydrocalumite have been found in degraded binder pastes. CSH, stratlingite and monocarboaluminate werendetected as products of pozzolanic reaction of silicate and metakaolin with calcium hydroxide.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JJ - Ostatní materiály

OECD FORD obor

—

Projekt

<a href="/cs/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Kumulativní časově závislé procesy ve stavebních materiálech a konstrukcích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Thermal Analysis and Calorimetry

ISSN

1388-6150

e-ISSN

—

Svazek periodika

125

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

1115-1123

Kód UT WoS článku

000383142000014

EID výsledku v databázi Scopus

2-s2.0-84961202177