The properties of fly ash based geopolymer mortars made with dune sand

S. Chuah, W. H. Duan, Z. Pan, E. Hunter, A. H. Korayem, X. L. Zhao, F. Collins, J. G. Sanjayan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

94 Citations (Scopus)

Abstract

This paper reports the properties of fly ash based geopolymer mortars made with dune sand. The geopolymer mortars of different cation type, namely sodium based (Na), potassium based (K) and a mixed Na/K, were prepared with dune sand (DS) and river sand (RS). The corresponding geopolymer pastes were also prepared. A series of tests including compressive strength, modulus of elasticity, splitting tensile strength, microanalysis (using scanning electron microscopy), porosity (using mercury intrusion porosimetry), sorptivity and air void (using section analysis method) were carried out. The results showed a strong correlation between strength and porosity of geopolymeric materials. The addition of DS had influences on the chemical compositions and physical properties of geopolymer mortars. These influences were dependent on the type of cation. Based on the results of mechanical properties, DS can be utilised as the fine aggregate for the production of geopolymer based construction material.

Original languageEnglish
Pages (from-to)571-578
Number of pages8
JournalMaterials and Design
Volume92
DOIs
Publication statusPublished - 15 Feb 2016
Externally publishedYes

Keywords

  • Aggregate
  • Alkali activated cement
  • Compressive strength
  • Elastic moduli
  • Microstructure

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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