Nur Ain Jaya
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Preferred name
Nur Ain Jaya
Official Name
Nur Ain, Jaya
Alternative Name
Jaya, N. A.
Ain Jaya, Nur
Jaya, Nur Ain
Nur, Ain Jaya
Main Affiliation
Scopus Author ID
56354805400
Researcher ID
AAW-9244-2021

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  • Publication
    Comparative mechanical and microstructural properties of high calcium fly ash one-part geopolymers activated with Na₂SiO₃-anhydrous and NaAlO₂
    ( 2021)
    Ooi Wan-En
    ;
    Liew Yun Ming
    ;
    Heah Cheng Yong
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Ho Li Ngee
    ;
    Foo Kai Loong
    ;
    Ong Shee-Ween
    ;
    Ng Hui-Teng
    ;
    Ng Yong-Sing
    ;
    Nur Ain Jaya
    ;
    Long-Yuan Li
    This paper investigates the effect of varying solid alkali activators on the fresh and hardened properties and microstructural changes of one-part geopolymers (OPGs). Single and binary solid alkali activators were used to activate high calcium fly ash. The alkali activators were either solely sodium metasilicate (Na₂SiO₃) or a combination of sodium aluminate (NaAlO₂) and sodium metasilicate (Na₂SiO₃). The OPG activated with anhydrous Na₂SiO₃ achieved an excellent 28-day compressive strength of 83.6 MPa while OPG activated with NaAlO₂ and Na₂SiO₃ attained a compressive strength of 45.1 MPa. The Na₂SiO₃-activated OPG demonstrated better fluidity than the OPG activated with NaAlO₂ and Na₂SiO₃ due to the thixotropic behaviour caused by the NaAlO₂. The Na₂SiO₃-activated OPG consisted of sodium-calcium aluminium silicate hydrate ((N,C)-A-S-H) gel phase, while the OPG activated with NaAlO₂ and Na₂SiO₃ comprised of the coexistence of sodium aluminium silicate hydrate (N-A-S-H) and calcium aluminium silicate hydrate (C-A-S-H) gel phases. Regardless of the distinctive properties, the OPGs are adequate for building materials applications.
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