Researchers: Recent submissions

Now showing items 1-20 of 3480

    • Synthesis of sodium silicate from rice husk ash as an activator to produce epoxy-geopolymer cement 

      L. Handayani; S. Aprilia; Abdullah; C. Rahmawati; Mohd Mustafa Al Bakri, Abdullah; Ikmal Hakem, Aziz; Emy Aizat, Azimi (IOP Publishing Ltd, 2021-03)
      Rice husk ash (RHA), a byproduct of the rice industry, is the primary source of amorphous silica for producing sodium silicate solutions to replace standard commercial sodium silicate in geopolymer mixture design. The ...

    • The effects of various concentrations of NaOH on the inter-particle gelation of a fly ash geopolymer aggregate 

      Alida, Abdullah; Kamarudin, Hussin; Mohd Mustafa Al Bakri, Abdullah; Zarina, Yahya; Sochacki, Wojciech; Rafiza, Abd Razak; Błoch, Katarzyna; Hamzah, Fansuri (MDPI AG, 2021-02)
      Aggregates can be categorized into natural and artificial aggregates. Preserving natural resources is crucial to ensuring the constant supply of natural aggregates. In order to preserve these natural resources, the production ...

    • Optimizing of the cementitious composite matrix by addition of steel wool fibers (chopped) based on physical and mechanical analysis 

      Akrm A Rmdan, Amer; Mohd Mustafa Al Bakri, Abdullah; Liew, Yun-Ming; Ikmal Hakem, Aziz; Wysłocki, Jerzy J.; Muhammad Faheem, Mohd Tahir; Sochacki, Wojciech; Garus, Sebastian; Gondro, Joanna; Hetham A, . R. Amer (MDPI AG, 2021-02)
      The demand for durable, resistant, and high-strength structural material has led to the use of fibers as reinforcing elements. This paper presents an investigation into the inclusion of chopped steel wool fibers (CSWFs) ...

    • The effect of thermal annealing on the microstructure and mechanical properties of Sn-0.7Cu-xZn solder joint 

      Mohd Izrul Izwan, Ramli; Mohd Arif Anuar, Mohd Salleh; Rita, Mohd Said; Mohd Mustafa Al Bakri, Abdullah; Dewi Suriyani, Che Halin; Norainiza, Saud; Nabiałek, Marcin (MDPI AG, 2021-02)
      The microstructural properties of a Pb-free solder joint significantly affect its mechanical behaviours. This paper details a systematic study of the effect of the annealing process on the microstructure and shear strength ...

    • Properties of a New Insulation Material Glass Bubble in Geopolymer Concrete 

      Noor Fifinatasha, Shahedan; Mohd Mustafa Al Bakri, Abdullah; Norsuria, Mahmed; Kusbiantoro, Andri; Tammas-Williams, Sam; Li, Long-Yuan; Ikmal Hakem, Aziz; Vizureanu, Petrica; Wysłocki, Jerzy J.; Bloch, Katarzyna; Nabiałek, Marcin (MDPI AG, 2021-02)
      This paper details analytical research results into a novel geopolymer concrete embedded with glass bubble as its thermal insulating material, fly ash as its precursor material, and a combination of sodium hydroxide (NaOH) ...

    • Effect of aluminium powder on kaolin-based geopolymer characteristic and removal of Cu²⁺ 

      Nurliyana, Ariffin; Mohd Mustafa Al Bakri, Abdullah; Postawa, Przemysław; Shayfull Zamree, Abd Rahim; Mohd Remy Rozainy, Mohd Arif Zainol; Ramadhansyah, Putra Jaya; Sliwa, Agata; Mohd Firdaus, Omar (MDPI AG, 2021-02)
      This current work focuses on the synthesis of geopolymer-based adsorbent which uses kaolin as a source material, mixed with alkali solution consisting of 10 M NaOH and Na₂SiO₃ as well as aluminium powder as a foaming agent. ...

    • Performance of Sn-3.0Ag-0.5Cu composite solder with kaolin geopolymer ceramic reinforcement on microstructure and mechanical properties under isothermal ageing 

      Nur Syahirah, Mohamad Zaimi; Mohd Arif Anuar, Mohd Salleh; Sandu, Andrei Victor; Mohd Mustafa Al Bakri, Abdullah; Norainiza, Saud; Shayfull Zamree, Abd Rahim; Vizureanu, Petrica; Rita, Mohd Said; Mohd Izrul, Izwan Ramli (MDPI AG, 2021-02)
      This paper elucidates the effect of isothermal ageing at temperature of 85 °C, 125 °C and 150 °C for 100, 500 and 1000 h on Sn-3.0Ag-0.5Cu (SAC305) lead-free solder with the addition of 1 wt% kaolin geopolymer ceramic (KGC) ...

    • Hybrid mold: comparative study of rapid and hard tooling for injection molding application using Metal Epoxy Composite (MEC) 

      Radhwan, Hussin; Safian, Sharif; Nabiałek, Marcin; Shayfull Zamree, Abd Rahim; Mohd Tanwyn, Mohd Khushairi; Mohd Azlan, Suhaimi; Mohd Mustafa Al Bakri, Abdullah; Mohd Hazwan, Mohd Hanid; Wysłocki, Jerzy J.; Bloch, Katarzyna (MDPI AG, 2021-02)
      The mold-making industry is currently facing several challenges, including new competitors in the market as well as the increasing demand for a low volume of precision moldings. The purpose of this research is to appraise ...

    • Microstructure evolution of Ag/TiO₂ thin film 

      Dewi Suriyani, Che Halin; Kamrosni, Abdul Razak; Mohd Arif Anuar, Mohd Salleh; Mohd Izrul Izwan, Ramli; Mohd Mustafa Al Bakri, Abdullah; Ayu Wazira, Azhari; Kazuhiro, Nogita; Hideyuki, Yasuda; Nabiałek, Marcin; Wysłocki, Jerzy J. (MDPI AG, 2021-01)
      Ag/TiO₂ thin films were prepared using the sol-gel spin coating method. The microstructural growth behaviors of the prepared Ag/TiO₂ thin films were elucidated using real-time synchrotron radiation imaging, its structure ...

    • Evaluation of the effect of silica fume on amorphous fly ash geopolymers exposed to elevated temperature 

      Li, Ong Huey; Yun-Ming, Liew; Cheng-Yong, Heah; Ridho, Bayuaji; Mohd Mustafa Al Bakri, Abdullah; Loong, Foo Kai; Jin, Tan Soo; Teng, Ng Hui; Nabiałek, Marcin; Jeż, Bartłomiej; Yong Sing, Ng (MDPI AG, 2021-01)
      The properties of amorphous geopolymer with silica fume addition after heat treatment was rarely reported in the geopolymer field. Geopolymer was prepared by mixing fly ash and alkali activator. The silica fume was added ...

    • Characterisation at the bonding zone between fly ash based geopolymer repair materials (GRM) and ordinary portland cement concrete (OPCC) 

      Warid Wazien, Ahmad Zailani; Mohd Mustafa Al Bakri, Abdullah; Mohd Fadzil, Arshad; Rafiza, Abd Razak; Muhammad Faheem, Mohd Tahir; Remy Rozainy, Mohd Arif Zainol; Nabiałek, Marcin; Sandu, Andrei Victor; Wysłocki, Jerzy J.; Błoch, Katarzyna (MDPI AG, 2020-12)
      In recent years, research and development of geopolymers has gained significant interest in the fields of repairs and restoration. This paper investigates the application of a geopolymer as a repair material by implementation ...

    • Bonding strength characteristics of FA-based geopolymer paste as a repair material when applied on OPC substrate 

      Warid Wazien, Ahmad Zailani; Bouaissi, Aissa; Mohd Mustafa Al Bakri, Abdullah; Rafiza, Abd Razak; Yoriya, Sorachon; Mohd Arif Anuar, Mohd Salleh; Mohd Remy Rozainy, M. A. Z.; Hamzah, Fansuri (MDPI AG, 2020-05)
      This investigative study aims to study the mechanical and morphological properties of fly ash (FA)-based geopolymer paste as a repair material when applied on ordinary Portland cement (OPC) overlay concrete. The first part ...

    • Phase Transformation of Kaolin-Ground Granulated Blast Furnace Slag from Geopolymerization to Sintering Process 

      Noorina Hidayu, Jamil; Mohd Mustafa Al Bakri, Abdullah; Faizul, Che Pa; Hasmaliza, Mohamad; Wan Mohd Arif, W. Ibrahim; Ikmal Hakem, Aziz; Jeż, Bartłomiej; Nabiałek, Marcin (MDPI AG, 2021-02)
      The main objective of this research was to investigate the influence of curing temperature on the phase transformation, mechanical properties, and microstructure of the as-cured and sintered kaolin-ground granulated blast ...

    • Synthesis and characterization of fly ash based geopolymer ceramics: effect of NaOH concentration 

      Romisuhani, Ahmad; Wan Mastura, Wan Ibrahim; Mohd Mustafa Al Bakri, Abdullah; Sandu, Andrei Victor; Nurul Aida, Mohd Mortar; Noratikah, Hashim; Warid Wazien, Ahmad Zailani (IOP Publishing Ltd, 2020-02)
      Ceramic materials have demonstrated impressive performance under severe conditions in a wide number of areas including health, energy and environment, transportation and electronic applications. In order to meet the growing ...

    • Compressive strength and thermal conductivity of metakaolin geopolymers with anisotropic insulations 

      Nur Ain, Jaya; Yun-Ming, Liew; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin; Cheng Yong, Heah; Ridho, Bayuaji; Muhammad Faheem, Mohd Tahir (IOP Publishing Ltd, 2020-02)
      This research investigated the properties of thermally insulating geopolymer prepared using waste filler (fibreboard and rubber) to act as anisotropic pore/insulation. The geopolymer matrix was synthesised using metakaolin ...

    • In Vitro bioactivity study of thermoplastic Starch/Bentonite/Hydroxyapatite composites for biomedical applications 

      Nurul Husna, Zakaria; Noorhafiza, Muhammad; Mohd Mustafa Al Bakri, Abdullah; S. N. F., M. Noor (IOP Publishing Ltd, 2020-02)
      Potato starch composites film incorporating hybrid bentonite and hydroxyapatite (HA) were investigated as novel biomaterial for potential biomedical applications. The selected potato starch/bentonite composites were prepared ...

    • Mechanical and physical properties of bottom ash/fly ash geopolymer for pavement brick application 

      Wan Mastura, Wan Ibrahim; Mohd Mustafa Al Bakri, Abdullah; Muhammad Faheem, Mohd Tahir; Nurul Aida, Mohd Mortar; Muhammad Amirul Aziem, Noor Azli (IOP Publishing Ltd, 2020-02)
      Geopolymers are amorphous to semi-crystalline with excellent physical and and mechanical properties. It has been used to become a potential binder to Ordinary Portland Cement (OPC) in certain applications due to its lower ...

    • Effect of solid-to-liquid ratio on thin fly ash geopolymer 

      Yong-Sing, Ng; Yun-Ming, Liew; Mohd Mustafa Al Bakri, Abdullah; Hui-Teng, Ng; Kamarudin, Hussin; Cheng Yong, Heah; Nurul Aida, Mohd Mortar; Sandu, Andrei Victor (IOP Publishing Ltd, 2020-02)
      The present work studies the effect of solid-to-liquid (S/L) ratio on the properties of thin fly ash-based geopolymer. The fly ash geopolymers with dimension of 160 mm × 40 mm × 10 mm were synthesised by using various S/L ...

    • 132kV oil impregnated paper bushing transformer - design by CAD, analysed by FEM 

      Nurulazmi, Abd Rahman; Muzamir, Isa; ‪Mohamad Nur Khairul Hafizi, Rohani; H. A., Hamid; Mohd Mustafa Al Bakri, Abdullah (Horizon Research Publishing, 2019)
      The Electric Field and Voltage Distribution (EFVD) are an important parameter for assessing high voltage bushing transformer performance. However, conducting laboratories experiment is dangerous, difficult and expensive ...

    • Seawater exposure effect on fly ash based geopolymer concrete with inclusion of steel fiber 

      Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Yee Jing, Leow; Long-Yuan, Li; Rafiza, Abd Razak (IOP Publishing Ltd, 2020-02)
      Concrete is widely used in construction offshore such as concrete floating bridges and sea tank. This research is providing an alternative construction material to replace ordinary Portland cement (OPC) concrete known as ...