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
    Porous Metakaolin Geopolymers with Tailored Thermal Conductivity
    ( 2019-08-14)
    Nur Ain Jaya
    ;
    Yun-Ming L.
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Cheng-Yong H.
    In this work, a novel lightweight metakaolin geopolymers were produced by using hydrogen peroxide as foaming agent. The influence of the hydrogen peroxide incorporation content (0.25 - 1.25%) on density, compressive strength and thermal conductivity was evaluated. The experimental results show that the density and compressive strength were decrease with increasing content of hydrogen peroxide. However, the thermal insulating properties of the geopolymer foams were improved with increasing content of foaming agent. Geopolymers exhibiting thermal conductivity as low as 0.172 W/mK and a density of 0.5 g/cm3 were produced, showing the potential of these materials in applications requiring lightweight and low thermal conductivity materials.
      2
  • Publication
    Cold-pressed fly ash geopolymers: effect of formulation on mechanical and morphological characteristics
    ( 2021-11-01)
    Ong Shee Ween
    ;
    Heah Cheng Yong
    ;
    Liew Yun Ming
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Chan L.W.L.
    ;
    Ho Li Ngee
    ;
    Ooi Wan-En
    ;
    Nur Ain Jaya
    ;
    Ng Yong-Sing
    This research uses low alkali activator content and cold pressing technique for fly ash-based geopolymers formation under room temperature condition. The geopolymers were prepared using four different parameters: fly ash/alkali activator ratio, sodium hydroxide concentration, sodium silicate/sodium hydroxide ratio and pressing force. The results indicated that the compressive strength (114.2 MPa) and flexural strength (29.9 MPa) of geopolymers maximised at a fly ash/alkali activator ratio of 5.5, a 14 M sodium hydroxide concentration, a sodium silicate/sodium hydroxide ratio of 1.5 and a pressing force of 5 tons (pressing stress of 100.0 MPa and 155.7 MPa for compressive and flexural samples, respectively). The degree of reaction (40.1%) enhanced the structure compactness with minimum porosity. The improved mechanical properties confirmed that a high strength pressed geopolymer could be formed at low alkali activator content without the aid of temperature.
      4  1