Browsing Rafiza Abd Razak, Dr. by Subject "Fly ash"

Now showing items 1-11 of 11

    • Bond strength mechanism of fly ash based geopolymer mortars: a review 

      ‪Warid Wazien, Ahmad Zailani; Mohd Mustafa Al Bakri, Abdullah; Rafiza, Abd Razak; Mohd Remy Rozainy, Mohd Arif Zainol‬; Muhammad Faheem, Mohd Tahir (IOP Publishing Ltd, 2017-11)
      Geopolymer possess many excellent properties such as high compressive and bond strength, long term durability, better acid resistance and also known as a "Sustainable Material" due to its low carbon emission and low energy ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Chemical reactions in the geopolymerisation process using fly ash-based geopolymer: A review 

      Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin; Mohammed Amjad, Hussain; Khairul Nizar, Ismail; Rafiza, Abdul Razak; Mohd Izzat, Ahmad (American-Eurasian Network for Scientific Information (AENSI Publisher), 2011-07)
      The development of our world, demanding the power supply which is produced by combustion of coal. Unfortunately, the million of tons of fly ash and related-products have been generated. To overcome these problems, fly ash ...

    • 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 ...

    • The effect of curing temperature on physical and chemical properties of geopolymers 

      Mohd Mustafa, Al Bakri Abdullah; Kamarudin, Hussin; Mohammed Amjad, Hussain; Khairul Nizar, Ismail; Zarina, Yahya; Rafiza, Abdul Razak (Elsevier BV, 2011)
      Fly ash-based geopolymers required heat to increase the geopolymerization process in order to obtain higher compressive strength. As such, geopolymer samples were prepared using different curing temperatures (room temperature, ...

    • Fly ash-based geopolymer lightweight concrete using foaming agent 

      Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Mohamed, Bnhussain; Khairul Nizar, Ismail, Prof. Madya Dr.; Zarina, Yahya; Rafiza, Abdul Razak (MDPI, Basel, Switzerland., 2012-06)
      In this paper, we report the results of our investigation on the possibility of producing foam concrete by using a geopolymer system. Class C fly ash was mixed with an alkaline activator solution (a mixture of sodium ...

    • Investigation of heat released during geopolymerization with fly ash based geopolymer 

      Rosnita, Mohamed; Rafiza, Abd Razak; Mohd Mustafa Al Bakri, Abdullah; Raa Khimi, Shuib; Nurul Aida, Mohd Mortar; Warid Wazien, Ahmad Zailani (IOP Publishing Ltd, 2019-08)
      Geopolymerization consists of several chemical reactions that has been reported widely as an exothermic reaction. Previous studies on heat released during geopolymerization used metakaolin and fly ash of F class as a ...

    • Reviews on the different sources materials to the geopolymer performance 

      S. N. Fifinatasha; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Zarina, Yahya; Rafiza, Abdul Razak; Liyana, Jamaludin (AENSI Publisher All rights reserved, 2013-10)
      Geopolymer is manufactured from the aluminosilicate source material in example fly ash, silica fume, kaolin, ground granulate blast slag (GGBS), boiler ash and volcano ash reactivated via alkaline solution. But the different ...

    • Study on refractory materials application using geopolymer processing 

      Mohd Mustafa Al-Bakri, Abdullah; Liyana, Jamaludin; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Mohamed, Bnhussain, Prof. Dr.; Che Mohd Ruzaidi, Ghazali, Prof. Madya; Rafiza, Abdul Razak; Mohd Izzat, Ahmad (American Scientific Publishers, 2013-01)
      Geopolymer is cementitious binders that do not require the presence of ordinary Portland cement (OPC). Class F fly ash with geopolymer formulations prepared with an alkaline activator (mixture of Na2SiO3 and NaOH solutions) ...