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  5. Assessment of geopolymer concrete for underwater concreting properties
 
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Assessment of geopolymer concrete for underwater concreting properties

Journal
Archives of Metallurgy and Materials
ISSN
2300-1909
Date Issued
2021
Author(s)
Fakhryna Hannanee Ahmad Zaidi
Universiti Malaysia Perlis
Romisuhani Ahmad
Universiti Malaysia Perlis
Mohd. Mustafa Al Bakri Abdullah
Universiti Malaysia Perlis
Wan Mastura Wan Ibrahim
Universiti Malaysia Perlis
Ikmal Hakem Aziz
Universiti Malaysia Perlis
Subaer Junaidi
Universitas Negeri Makassar
Salmabanu Luhar
Frederick Research Center
DOI
10.24425/amm.2022.137805
Handle (URI)
https://journals.pan.pl/Content/123307/PDF/AMM-2022-2-37-Al%20Bakri.pdf
https://journals.pan.pl/dlibra
https://hdl.handle.net/20.500.14170/9353
Abstract
For ages, concrete has been used to construct underwater structures. Concrete laying underwater is a very complex procedure important to the success or failure of underwater projects. This paper elucidates the influence of alkali activator ratios on geopolymers for underwater concreting; focusing on the geopolymer concrete synthesized from fly ash and kaolin activated using sodium hydroxide and sodium silicate solutions. The geopolymer mixtures were designed to incorporate multiple alkali activator ratios to evaluate their effects on the resulting geopolymers’ properties. The fresh concrete was molded into 50 mm cubes in seawater using the tremie method and tested for its engineering properties at 7 and 28 days (curing). The control geopolymer and underwater geopolymers’ mechanical properties, such as compressive strength, water absorption density, and setting time were also determined. The differences between the control geopolymer and underwater geopolymer were determined using phase analysis and functional group analysis. The results show that the geopolymer samples were optimally strengthened at a 2.5 alkali activator ratio, and the mechanical properties of the control geopolymer exceeded that of the underwater geopolymer. However, the underwater geopolymer was determined to be suitable for use as underwater concreting material as it retains 70% strength of the control geopolymer.
Subjects
  • Geopolymer

  • Underwater concrete

  • Fly ash

  • Kaolin

File(s)
Assessment of Geopolymer Concrete for Underwater Concreting Properties.pdf (3.69 MB)
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