Farah Farhana Zainal
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Preferred name
Farah Farhana Zainal
Official Name
Farah Farhana, Zainal
Alternative Name
Zainal, Farah Farhana
Farhana, Z. F.
Zainal, F. F.
Main Affiliation
Scopus Author ID
56960654700
Researcher ID
DYA-1384-2022

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  • Publication
    Interaction of geopolymer filler and alkali molarity concentration towards the fire properties of glass-reinforced epoxy composites fabricated using filament winding technique
    ( 2022)
    Mohammad Firdaus Abu Hashim
    ;
    Meor Ahmad Faris bin Meor Ahmad Tajudin
    ;
    Md Azree Othuman Mydin
    ;
    Che Mohd Ruzaidi Ghazali
    ;
    Yusrina Mat Daud
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Farah Farhana Zainal
    ;
    Muhammad Faheem Saloma
    ;
    Heah Cheng Mohd Tahir
    ;
    Morteza Yong
    This paper aims to find out the effect of different weight percentages of geopolymer filler in glass-reinforced epoxy pipe, and which can achieve the best mechanical properties and adhesion between high calcium pozzolanic-based geopolymer matrices. Different weight percentages and molarities of epoxy hardener resin and high calcium pozzolanic-based geopolymer were injected into the glass fiber. By manually winding filaments, composite samples were produced, and they were then allowed to cure at room temperature. To determine how well the geopolymer matrices adhere to the fiber reinforcement, the microstructure of the composites’ surfaces and perpendicular sections were examined. Maximum values of compressive strength and compressive modulus were 94.64 MPa and 2373.58 MPa, respectively, for the sample with a weight percentage of filler loading of 30 wt% for an alkali concentration of 12 M. This is a relatively wide range of geopolymer weight percentage of filler loading from 10 wt% to 40 wt%, at which we can obtain high compressive properties. By referring to microstructural analysis, adhesion, and interaction of the geopolymer matrix to glass fiber, it shows that the filler is well-dispersed and embedded at the fiber glass, and it was difficult to determine the differences within the range of optimal geopolymer filler content. By determining the optimum weight percent of 30 wt% of geopolymer filler and microstructural analysis, the maximum parameter has been achieved via analysis of high calcium pozzolanic-based geopolymer filler. Fire or elevated temperature represents one of the extreme ambient conditions that any structure may be exposed to during its service life. The heat resistance or thermal analysis between glass-reinforced epoxy (GRE) pipe and glass-reinforced epoxy pipe filled with high calcium pozzolanic-based geopolymer filler was studied by investigating burning tests on the samples, which shows that the addition of high calcium pozzolanic-based geopolymer filler results in a significant reduction of the melted epoxy.
  • Publication
    Bonding and phases analysis of geopolymer materials
    (IOP Publishing, 2020)
    Nor Shida Dalila Mohd Azhar
    ;
    Farah Farhana Zainal
    ;
    Mohd. Mustafa Al Bakri Abdullah
    This paper presents the bondings and mineral phases exist in geopolymer material consist of raw fly ash, raw metakaolin and also fly ash and metakaolin blend geopolymer. Fly ash used is a waste materials from Lumut power plant by combusting coal while metakaolin was obtained by calcining the kaolin at 750 C for 4 hours. Alkaline activators that act as binder were sodium silicate (Na2SiO3) solution and sodium hydroxide (NaOH) solution with the ratio of Na2SiO3/NaOH is 2.5 to 1. The samples undergo Functional Group Identification (FTIR) and Phase Analysis (XRD). FTIR results show that after geopolymerization process, the band shifted to lower wavenumber (776 cm-1 ) due to interaction of Al atoms in the silicate geopolymer network because of higher cross-linking. XRD results show mineral phases of quartz and mullite in geopolymer after geopolymerization process and it can be said that not all mineral phases from raw material participating in formation of geopolymer matrix.