Browsing School of Environmental Engineering (Articles) by Subject "Alkaline activator"

Now showing items 1-7 of 7

    • 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 ...

    • The influence of curing periods on the compressive strength of fly ash-based geopolymer at different aging times 

      Omar A., Abdulkareem; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Prof. Madya Dr. (Trans Tech Publications, 2012)
      The results of the current experimental investigation indicate the significant effect of the heating periods on the compressive strength of fly ash-based geopolymers prepared at different alkaline liquid content at both ...

    • Lightweight fly ash-based geopolymer concrete 

      Omar A., Abdulkareem; Mohd Mustafa Al Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Prof. Madya Dr. (Trans Tech Publications, 2013)
      The experiments of this study were preformed to study the synthesis process for lightweight aggregate geopolymer concrete (LWAGC) using normal sand as a fine aggregate and expanded clay as lightweight aggregate. The LWAGC ...

    • Mechanical performances of fly ash geopolymer bricks 

      Wan Mastura, Wan Ibrahim; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Prof. Madya Dr.; Mohd Mustafa Al Bakri, Abdullah (American Scientific Publishers, 2013-01)
      Geopolymer is a new class of three-dimensionally networked amorphous to semi-crystalline alumino-silicate materials, and first developed by Professor Davidovits in 1978. Geopolymers can be synthesized by mixing alumino-silicate ...

    • Microstructure studies on the effect of the alkaline activators of fly ash-based geopolymer at elevated heat treatment temperature 

      Mohd Mustafa Al-Bakri, Abdullah; Omar A., Abdulkareem; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Rafiza, Abdul Razak; Zarina, Yahya; Alida, Abdullah (Trans Tech Publications, 2013)
      Fly ash-based geopolymers are new binding materials produced to replace the ordinary Portland cement (OPC) used in concrete. In this research, the effect of alkaline activators on the compressive strength and the microstructure ...

    • Study on solids-to-liquid and alkaline activator ratios on kaolin-based geopolymers 

      Cheng, Yong Heah; Kamarudin, Hussin, Brig. Gen. Dato' Prof. Dr.; Mohd Mustafa Al-Bakri, Abdullah; Mohammed, Hussain; Luqman, Musa; Khairul Nizar, Ismail, Assoc. Prof. Dr.; Che Mohd Ruzaidi, Ghazali; Liew, Yun Ming (Elsevier Ltd., 2012-10)
      Kaolin and alkali activator were mixed with the solids-to-liquid ratios in range of 0.60-1.20 (Al 2O 3/Na 2O molar ratio of 0.63-1.27). Sodium silicate and sodium hydroxide ranged between 0.16 and 0.36 (SiO 2/Na 2O molar ...

    • A study on the synthesis of fly ash-based lightweight aggregate geopolymer concrete 

      Omar A., Abdulkareem; Mohd Mustafa Al-Bakri, Abdullah; Kamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.; Khairul Nizar, Ismail, Assoc. Prof. Dr. (American Scientific Publishers All rights reserved., 2013-01)
      The experiments conducting for current investigation aimed to study the synthesis process for lightweight aggregate geopolymer concrete (LWAGC) and explore the significance and limitations of the activator content on the ...