Browsing by Author "Sandu, Andrei Victor"

Now showing items 1-20 of 25

    • Behavior of alkali-activated fly ash through underwater placement 

      Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Li, Long-yuan; Nergis, Dumitru Doru Burduhos; Muhammad Aiman Asyraf, Zainal Hakimi; Sandu, Andrei Victor; Vizureanu, Petrica; Rafiza, Abd Razak (MDPI AG, 2021-11-14)
      Underwater concrete is a cohesive self-consolidated concrete used for concreting underwater structures such as bridge piers. Conventional concrete used anti-washout admixture (AWA) to form a high-viscosity underwater ...

    • 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 ...

    • A comparative study of solder properties of Sn-0.7Cu lead-free solder fabricated via the powder metallurgy and casting methods 

      Mohd Arif Anuar, Mohd Salleh; Mohd Mustafa Al Bakri, Abdullah; Sandu, Andrei Victor; Norainiza, Saud; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; McDonald, Stuart D.; Nogita, Kazuhiro (Syscom 18 SRL, 2013-07)
      The properties of Sn-0.7Cu solder bulk prepared via the powder metallurgy (PM) method were investigated and compared with solder bulk fabricated through casting. Distinct microstructures were observed in both PM and casting ...

    • Contribution of interfacial bonding towards geopolymers properties in geopolymers reinforced fibers: a review 

      Muhd Hafizuddin, Yazid; Meor Ahmad Faris, Meor Ahmad Tajudin; Mohd Mustafa Al Bakri, Abdullah; Nabiałek, Marcin; Shayfull Zamree, Abd Rahim; Mohd Arif Anuar, Mohd Salleh; Marwan, Kheimi; Sandu, Andrei Victor; Rylski, dam; Jeż, Bartłomiej (Multidisciplinary Digital Publishing Institute (MDPI), 2022-02-17)
      There is a burgeoning interest in the development of geopolymers as sustainable construction materials and incombustible inorganic polymers. However, geopolymers show quasi-brittle behavior. To overcome this weakness, ...

    • Design of Experiment on Concrete Mechanical Properties Prediction: A Critical Review 

      Wei Chong, Beng; Rokiah, Othman; Ramadhansyah, Putra Jaya; Mohd Rosli, Mohd Hasan; Sandu, Andrei Victor; Nabiałek, Marcin; Jeż, Bartłomiej; Pietrusiewicz, Paweł; Kwiatkowski, Dariusz; Postawa, Przemysław; Mohd Mustafa Al Bakri, Abdullah (MDPI AG, 2021-04-09)
      Concrete mix design and the determination of concrete performance are not merely engineering studies, but also mathematical and statistical endeavors. The study of concrete mechanical properties involves a myriad of factors, ...

    • Design, processing and characterization of fly ash-based geopolymers for lightweight concrete application 

      Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Sandu, Andrei Victor; Mohamed, Bnhussain, Prof. Dr.; Zarina, Yahya; Rafiza, Abdul Razak (Institute for Scientific Information (ISI), 2013-04)
      The mix design of geopolymers plays important role in obtaining desirable compressive strength. Optimum mix design of geopolymers can be applied for application, such as lightweight concrete. In order to determine the ...

    • Durability of metakaolin geopolymers with various sodium silicate/sodium hydroxide ratios against seawater exposure 

      Nur Ain, Jaya; Mohd Mustafa Al Bakri, Abdullah; Li, Long-Yuan; Sandu, Andrei Victor; Kamarudin, Hussin; Ming, Liew Yun (AIP Publishing, 2017-09)
      This work presents an investigation of the performance of metakaolin geopolymers exposed to the continuous immersion of seawater. The geopolymers were prepared from metakaolin by activating with a mixture of sodium ...

    • Effect of Crumb Rubber on compressive strength of fly ash based Geopolymer concrete 

      Ahmad Azrem, Azmi; Mohd Mustafa Al Bakri, Abdullah; Che Mohd Ruzaidi, Ghazali; Sandu, Andrei Victor; Kamarudin, Hussin (EDP Sciences, 2016)
      This study explores the effect of different percentage of crumb rubber on compressive strength of fly ash based geopolymer concrete. This research attempted to produce rubberized geopolymer concrete as an environmentally ...

    • Effect of mixing temperature on characteristics of thermoplastic potato starch film 

      Nurul Husna, Zakaria; Noorhafiza, Muhammad; Sandu, Andrei Victor; Mohd Mustafa Al Bakri, Abdullah (IOP Publishing Ltd, 2018-06)
      This study present the preparation of potato starch film with glycerol as a plasticizer through a solution casting technique. The effect of mixing temperature (80°C, 85°C, 90°C and 95°C) on the tensile and microstructure ...

    • 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 ...

    • Effect of Solids-To-Liquids, Na2SiO3-To-NaOH and Curing Temperature on the Palm Oil Boiler Ash (Si + Ca) Geopolymerisation System 

      Zarina, Yahya; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin; Khairul Nizar, Ismail; Rafiza, Abd Razak; Sandu, Andrei Victor (MDPI AG, 2015)
      This paper investigates the effect of the solids-to-liquids (S/L) and Na2SiO3/NaOH ratios on the production of palm oil boiler ash (POBA) based geopolymer. Sodium silicate and sodium hydroxide (NaOH) solution were used as ...

    • The effect of various waste materials' contents on the attenuation level of anti-radiation shielding concrete 

      Ali Basheer, Azeez; Kahtan Sadiq, Muhammed, Dr.; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Sandu, Andrei Victor; Rafiza, Abdul Razak (MDPI, Basel, Switzerland, 2013)
      Samples of concrete contain various waste materials, such as iron particulates, steel balls of used ball bearings and slags from steel industry were assessed for their anti-radiation attenuation coefficient properties. The ...

    • Fabrication of porous ceramic-geopolymer based material to improve water absorption and retention in construction materials: a review 

      Noorina Hidayu, Jamil; ‪Wan Mohd Arif, W Ibrahim; Mohd Mustafa Al Bakri, Abdullah; Sandu, Andrei Victor; Muhammad Faheem, Mohd Tahir (IOP Publishing Ltd, 2017-06)
      Porous ceramic nowadays has been investigated for a variety of its application such as filters, lightweight structural component and others due to their specific properties such as high surface area, stability and permeability. ...

    • Image analysis of surface porosity mortar containing processed spent bleaching earth 

      Wei Chong, Beng; Rokiah, Othman; Ramadhansyah, Putra Jaya; Shu Ing, Doh; Li, Xiaofeng; Mohd Haziman, Wan Ibrahim; Mohd Mustafa Al Bakri, Abdullah; Sandu, Andrei Victor; Płoszaj, Bartosz; Szmidla, Janusz; Stachowiak, Tomasz (MDPI AG, 2021-03-28)
      Image analysis techniques are gaining popularity in the studies of civil engineering materials. However, the current established image analysis methods often require advanced machinery and strict image acquisition procedures ...

    • Influence of solid-to-liquid ratio on properties of fly ash geopolymer ceramics 

      Romisuhani, Ahmad; Mohd Mustafa Al Bakri, Abdullah; Wan Mastura, Wan Ibrahim; Sandu, Andrei Victor; Warid Wazien, Ahmad Zailani; Sharun Nizam, Shahrun Nahar (IOP Publishing Ltd, 2019-08)
      Ceramics has come to be progressively very important in industry because of their exceptional mechanical and physical properties The motivation to develop fly ash geopolymer ceramics was to overcome the problem associated ...

    • Microstructural analysis of geopolymer and ordinary Portland cement mortar exposed to sulfuric acid 

      Mohd Izzat, Ahmad; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Moga, Ligia Mihaela; Che Mohd Ruzaidi, Ghazali, Prof. Madya; Muhammad Faheem, Mohd Tahir; Sandu, Andrei Victor (Revista De Materiale Plastice, 2013-09)
      The vulnerability of ordinary Portland cement (OPC) concrete to acidic attack is a worrying subject regarding the future durability of this binder. On the other side of binder's technology, the new technology of cement ...

    • Performance and characterization of geopolymer concrete reinforced with short steel fiber 

      Mohd Mustafa Al Bakri, Abdullah; Meor Ahmad Faris, Meor Ahmad Tajudin; Muhammad Faheem, Mohd Tahir; Aeslina, Abdul Kadir; Sandu, Andrei Victor; N A A, Mat Isa; Corbu, O (IOP Publishing Ltd, 2017-06)
      In the recent years, geopolymer concrete are reporting as the greener construction technology compared to conventional concrete that made up of ordinary Portland cement. Geopolymer concrete is an innovative construction ...

    • 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) ...

    • Review on characterization and mechanical performance of self-cleaning concrete 

      Siti Norsaffirah, Zailan; Norsuria, Mahmed; Mohd Mustafa Al Bakri, Abdullah; Sandu, Andrei Victor; Noor Fifinatasha, Shahedan (EDP Sciences, 2017-02)
      Self-cleaning concrete is an effective alternative to provide cleaner environment which contribute to sustainability and towards a green environment. It is in accordance with the requirements of environmental issues on ...

    • Study on fired clay bricks by replacing clay with palm oil waste: effects on physical and mechanical properties 

      Aeslina, Abdul Kadir; Noor Amira, Sarani; Mohd Mustafa Al Bakri, Abdullah; Perju, M C; Sandu, Andrei Victor (IOP Publishing Ltd, 2017-06)
      Palm oil is one of the major agricultural industries in Malaysia. Due to the poor management system, the discarded palm oil waste has always been linked to the environment issues. During processing of palm oil, a considerable ...