MONITORING THE INTERNAL STRUCTURE BEHAVIOUR OF ALKALI-ACTIVATED SLAG PASTE: EFFECT OF THE CURING MODE

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F23%3APU150086" target="_blank" >RIV/00216305:26110/23:PU150086 - isvavai.cz</a>

Result on the web

<a href="https://ojs.cvut.cz/ojs/index.php/ap/article/view/9186" target="_blank" >https://ojs.cvut.cz/ojs/index.php/ap/article/view/9186</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/AP.2023.63.0411" target="_blank" >10.14311/AP.2023.63.0411</a>

Result language

angličtina

Original language name

MONITORING THE INTERNAL STRUCTURE BEHAVIOUR OF ALKALI-ACTIVATED SLAG PASTE: EFFECT OF THE CURING MODE

Original language description

This paper deals with the monitoring of the internal structure behaviour of an alkali -activated slag (AAS) paste. The slag was activated with a 4M solution of sodium hydroxide. The behaviour of the internal structure of the paste was regularly monitored through the changes in the resonant frequency and the mechanical properties, until the paste reached the age of 90 days. The main aim of the article is to show the long-term maturation and degradation process of an AAS paste under different curing modes. The results obtained suggest that the curing mode of the specimens has a significant effect on the behaviour of the internal structure of the paste based on the AAS. The development of both the dynamic properties and the flexural strength indicates the occurrence of a higher porosity in the internal structure of the paste, especially when the free drying process is started earlier. Insufficient hydration of the binder system is also a likely cause of cracks. The reduction in the relative dynamic moduli values ranging from 50 % to 80 % was observed for drying specimens at the age of 90 days. What is very interesting is that the occurrence of cracks was not prevented even by intensive moist curing of the paste as, between the 21st and the 28th day of maturing, there was a significant decrease of about 20 % in the relative dynamic modulus of elasticity and also a 50 % reduction in the flexural strength.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

21100 - Other engineering and technologies

Project

<a href="/en/project/GA22-02098S" target="_blank" >GA22-02098S: Experimental analysis of the shrinkage, creep and cracking mechanism of the materials based on the alkali-activated slag</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Acta Polytechnica (on-line)

ISSN

1210-2709

e-ISSN

1805-2363

Volume of the periodical

63

Issue of the periodical within the volume

6

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

411-418

UT code for WoS article

001143265100005

EID of the result in the Scopus database

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