Nucleation and growth rate determination on alkali-activated slag under various sodium hydroxide molarity

• Autorzy: Mohamed Rosnita , Razak Rafiza Abd , Abdullah Mohd Mustafa Al Bakri , Rahim Shayfull Zamree Abd , Mortar Nurul Aida Mohd , Jamaludin Liyana , Nabialek Marcin

Identyfikatory

DOI

10.24425/ace.2024.150996

• Języki publikacji: EN

Abstrakty

EN

Alkali-activated slag has been noted as one of potential alternatives to the ordinary Portland cement due to its properties including high early strength performance and capability of ambient curing. However, there is still limited studies available on elucidating the reaction processes towards producing the excellent properties. This study aims to elucidate the mechanism of alkali activation of slag under different molarities of sodium hydroxide, which is one of the most influential factors on the properties of alkali-activated slag. Heat evolution of alkali-activated slag was used as a real-time monitoring technique. For mix designation, the molarity of sodium hydroxide was varied from 6M to 14 M, with solid-to-liquid ratios of 0.6 and alkali activator ratios of 2.0 remaining constant. The calorimetric data obtained was further used for determination of degree of reaction, nucleation and growth rate mechanism using Johnson-Mehl Avrami Kolmogrov model. According to the findings, it was found that regardless of various molarity of sodium hydroxide applied, the nucleation mechanism and growth is governed by instantaneous heterogeneous nucleation with rod-like growth as the n value is approaching 1 in which is observed from the morphology of the alkali-activated slag at lowest molarity applied (6 M). Furthermore, increasing in molarity of sodium hydroxide was found to decrease the total heat evolved and the lowest was obtained when using 14 M.

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2024
• Tom: Vol. 70, nr 3
• Strony: 473--485
• Opis fizyczny: Bibliogr. 20 poz., il., tab.

Twórcy

autor

Mohamed Rosnita

• Faculty of Chemical Engineering and Technology, University of Malaysia Perlis (UniMAP), Perlis, Malaysia
• Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), University of Malaysia Perlis (UniMAP), Perlis, Malaysia

• https://orcid.org/0000-0002-7154-2216

autor

Razak Rafiza Abd

• Faculty of Civil Engineering and Technology, University of Malaysia Perlis (UniMAP), Perlis, Malaysia
• Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), University of Malaysia Perlis (UniMAP), Perlis, Malaysia

• https://orcid.org/0000-0001-5499-8564

autor

Abdullah Mohd Mustafa Al Bakri

• Faculty of Chemical Engineering and Technology, University of Malaysia Perlis (UniMAP), Perlis, Malaysia
• Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), University of Malaysia Perlis (UniMAP), Perlis, Malaysia

• https://orcid.org/0000-0002-9779-8586

autor

Rahim Shayfull Zamree Abd

• Faculty of Mechanical Engineering and Technology, University Malaysia Perlis (UniMAP), Perlis, Malaysia
• Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), University of Malaysia Perlis (UniMAP), Perlis, Malaysia

• https://orcid.org/0000-0002-1458-9157

autor

Mortar Nurul Aida Mohd

• Faculty of Chemical Engineering and Technology, University of Malaysia Perlis (UniMAP), Perlis, Malaysia
• Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), University of Malaysia Perlis (UniMAP), Perlis, Malaysia

• https://orcid.org/0000-0001-5668-3080

autor

Jamaludin Liyana

• Faculty of Mechanical Engineering and Technology, University of Malaysia Perlis (UniMAP), Perlis, Malaysia
• Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), University of Malaysia Perlis (UniMAP), Perlis, Malaysia

• https://orcid.org/0000-0001-6984-6512

autor

Nabialek Marcin

• Department of Physics, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Częstochowa, Poland

• https://orcid.org/0000-0001-6585-3918

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