Experimental Determination of the Coefficient of Thermal Expansion of Hardened Alkali-Activated Slag Pastes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F24%3APU150448" target="_blank" >RIV/00216305:26110/24:PU150448 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scientific.net/AST.145.19" target="_blank" >https://www.scientific.net/AST.145.19</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/p-JCz5Ob" target="_blank" >10.4028/p-JCz5Ob</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Determination of the Coefficient of Thermal Expansion of Hardened Alkali-Activated Slag Pastes

Popis výsledku v původním jazyce

This paper presents the results of an experimental determination of the coefficient of thermal expansion of hardened alkali-activated slag pastes. In the experiment, three different activators were used – liquid sodium silicate, sodium carbonate and sodium hydroxide. The slag volume fraction for all paste types was set to 0.52. The specimens’ internal moisture content and shrinkage strains were plateaued at ambient laboratory conditions (temperature = 22 ± 2 °C, relative humidity = 55 ± 5 %) at the testing time. All of the specimens were wrapped into the polyethylene foil before the start of thermal dilation measurements and stored in the Q-Cell incubator in which they were subjected to temperature cycling from 5 °C to 30 °C. Length changes caused by the temperature changes were measured with dilatometers supplemented by continuous strain gauges measurement. The results show different values of the coefficient of thermal expansion depending on the activator type. Moreover, the strains recorded by the dilatometer through the steel pins embedded into the ends of specimens and by the strain gauges placed in the core of the test specimens led to different resulting values of the coefficient of thermal expansion.

Název v anglickém jazyce

Experimental Determination of the Coefficient of Thermal Expansion of Hardened Alkali-Activated Slag Pastes

Popis výsledku anglicky

This paper presents the results of an experimental determination of the coefficient of thermal expansion of hardened alkali-activated slag pastes. In the experiment, three different activators were used – liquid sodium silicate, sodium carbonate and sodium hydroxide. The slag volume fraction for all paste types was set to 0.52. The specimens’ internal moisture content and shrinkage strains were plateaued at ambient laboratory conditions (temperature = 22 ± 2 °C, relative humidity = 55 ± 5 %) at the testing time. All of the specimens were wrapped into the polyethylene foil before the start of thermal dilation measurements and stored in the Q-Cell incubator in which they were subjected to temperature cycling from 5 °C to 30 °C. Length changes caused by the temperature changes were measured with dilatometers supplemented by continuous strain gauges measurement. The results show different values of the coefficient of thermal expansion depending on the activator type. Moreover, the strains recorded by the dilatometer through the steel pins embedded into the ends of specimens and by the strain gauges placed in the core of the test specimens led to different resulting values of the coefficient of thermal expansion.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA22-02098S" target="_blank" >GA22-02098S: Experimentální analýza procesu smršťování, dotvarování a vzniku trhlin materiálů na bázi alkalicky aktivované strusky</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

7th Non-Traditional Cement and Concrete

ISBN

9783035737189

ISSN

1662-0356

e-ISSN

—

Počet stran výsledku

9

Strana od-do

19-27

Název nakladatele

Trans Tech Publications Ltd.

Místo vydání

Švýcarsko

Místo konání akce

Brno

Datum konání akce

25. 6. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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