Ho Li Ngee
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Ho Li Ngee
Official Name
Ho, Li Ngee
Alternative Name
Li Ngee, Ho
Ho, Li Ngee
Ngee, Ho Li
Ho, L. N.
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Scopus Author ID
57219028372
Researcher ID
DDY-6348-2022

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  • Publication
    Physico-mechanical and microstructural evolution of sintered pressed geopolymer: dual effects of aging period and sintering temperature
    (Elsevier, 2024-08-09)
    Ong Shee-Ween
    ;
    Heah Cheng Yong
    ;
    Liew Yun Ming
    ;
    Ho Li Ngee
    ;
    Lee Wei Hao
    ;
    Phakkhananan Pakawanit
    ;
    Part Wei-Ken
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Hang Yong-Jie
    ;
    Lim Jia-Ni
    ;
    Gao De-Wei
    ;
    Liu Mei-Ju
    Ceramics are highly valued for their exceptional thermal resistance and ability to withstand high temperatures. This study investigated the production of ceramic-like pressed geopolymer, focusing on the effects of aging period and sintering temperature. The results showed that the 7-day pressed geopolymer achieved the highest compressive (134.7 MPa) and flexural (34.9 MPa) strengths after sintering at 1000°C, with a density retention of 93.7 %, a mass loss of 7.9 %, and a thermal shrinkage of 1.4 %. Microstructural analysis at 1000°C showed a dense ceramic-like structure with nepheline formation. Phase analysis of the 7-day pressed geopolymer revealed a decrease in the amorphous phase as temperature increased, with nepheline formed at 800°C (26.0 %) and maximized at 1000°C (61.0 %). This work offers an optimal aging period and sintering temperature to maximize the mechanical strength and nepheline crystal formation, making them perfect for fire-resistant panels and precast construction products.