Frost Resistance of Alkali-Activated Concrete with Different Compositions - Parametric Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27120%2F24%3A10256280" target="_blank" >RIV/61989100:27120/24:10256280 - isvavai.cz</a>

Výsledek na webu

<a href="https://sciendo.com/article/10.2478/cee-2024-0072" target="_blank" >https://sciendo.com/article/10.2478/cee-2024-0072</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/cee-2024-0072" target="_blank" >10.2478/cee-2024-0072</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Frost Resistance of Alkali-Activated Concrete with Different Compositions - Parametric Study

Popis výsledku v původním jazyce

Alkali-Activated Materials (AAM) are often considered to be very durable and also frost-resistant. However, there are also contrary experiences. This paper focuses on the frost resistance of AAMs of different compositions - different amounts of activator and different ratios between alkali (R2O) and silicon oxide content. Sodium water glass was used as the activator and its silicate modulus was modified by the addition of KOH. The R2O content was 4 -10 % and the R2O/SiO2 weight ratio was 33/67 (water glass only) up to 100/0 (KOH only). The frost resistance index was tested at the ages of 28, 91 and 365 days. Specimens were cured in foil or water and comparative specimens were also stored in foil or water.The results obtained are inconclusive. Firstly, when the reference specimens are stored in water, their bending strength decreases. This means that the frost resistance index is dependent on the use of the reference specimens - better results of frost resistance index are obtained for water-cured beams as reference specimens as they show lower strengths. The composition has a marginal effect on the frost resistance. Longer curing times also do not increase frost resistance.

Název v anglickém jazyce

Frost Resistance of Alkali-Activated Concrete with Different Compositions - Parametric Study

Popis výsledku anglicky

Alkali-Activated Materials (AAM) are often considered to be very durable and also frost-resistant. However, there are also contrary experiences. This paper focuses on the frost resistance of AAMs of different compositions - different amounts of activator and different ratios between alkali (R2O) and silicon oxide content. Sodium water glass was used as the activator and its silicate modulus was modified by the addition of KOH. The R2O content was 4 -10 % and the R2O/SiO2 weight ratio was 33/67 (water glass only) up to 100/0 (KOH only). The frost resistance index was tested at the ages of 28, 91 and 365 days. Specimens were cured in foil or water and comparative specimens were also stored in foil or water.The results obtained are inconclusive. Firstly, when the reference specimens are stored in water, their bending strength decreases. This means that the frost resistance index is dependent on the use of the reference specimens - better results of frost resistance index are obtained for water-cured beams as reference specimens as they show lower strengths. The composition has a marginal effect on the frost resistance. Longer curing times also do not increase frost resistance.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20100 - Civil engineering

Projekt

<a href="/cs/project/EH22_008%2F0004631" target="_blank" >EH22_008/0004631: Materiály a technologie pro udržitelný rozvoj</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Civil and Environmental Engineering

ISSN

1336-5835

e-ISSN

2199-6512

Svazek periodika

20

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

9

Strana od-do

993-1001

Kód UT WoS článku

001378930000026

EID výsledku v databázi Scopus

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