Abstract
This paper discussed the effect of the addition of silica fume (2 wt.% and 4 wt.%) and alumina (2 wt.% and 4 wt.%) on the properties of fly ash geopolymer concrete. The fly ash geopolymer concrete achieved the highest 28-day compressive strength with 2 wt.% of silica fume (39 MPa) and 4 wt.% of alumina (41 MPa). The addition of 2 wt.% of silica fume increased the compressive strength by 105% with respect to the reference geopolymer (without additive). On the other hand, the compressive strength surged by 115% with 4 wt.% of alumina compared to the reference geopolymer. The addition of additives improved the compactness of the geopolymer matrix according to the morphology analysis.
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Authors and Affiliations
Heah Cheng Yong
1
2
ORCID:
Liew Yun Ming
1
3
ORCID:
Mohd Mustafa Al Bakri Abdullah
1
3
ORCID:
- Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), 01000 Perlis, Malaysia
- Faculty of Mechanical Engineering Technology, Universiti Malaysia Perlis (UniMAP), 02600 Perlis, Malaysia
- Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), 01000 Perlis, Malaysia
- Reactor Technology Center, Technical Support Division, Malaysian Nuclear Agency, Bangi, 43000 Kajang, Malaysia
- Department of Electrical & Electronic Engineering, Lee Kong Chian Faculty of Engineering & Science, Universiti Tunku Abdul Rahman, Bandar Sungai Long, 43000 Kajang, Malaysia
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