Abstract
Dolomite can be used as a source of aluminosilicate to produce geopolymers; however, this approach is limited by its low reactivity. This study analyzes the viability of producing geopolymers using dolomite/fly-ash with sodium silicate and NaOH solutions (at multiple concentrations) by determining the resultant geopolymers’ compressive strengths. The dolomite/fly-ash-based geopolymers at a NaOH concentration of ~22 M resulted in an optimum compressive strength of 46.38 MPa after being cured for 28 days, and the SEM and FTIR analyses confirmed the denser surface of the geopolymer matrix. The synchrotron micro-XRF analyses confirmed that the Ca concentration exceeded that of Si and Mg, leading to the formation of calcium silicate hydrate, which strengthens the resulting geopolymers.
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Authors and Affiliations
Mohd Mustafa Al Bakri Abdullah
1
ORCID:
Ikmal Hakem A. Aziz
1
ORCID:
Kamarudin Hussin
1
ORCID:
Jitrin Chaiprapa
2
ORCID:
Petrica Vizureanu
3
ORCID:
Sorachon Yoriya
4
ORCID:
Marcin Nabiałek
5
ORCID:
Jerzy J. Wyslocki
5
ORCID:
- Universiti Malaysia Perlis (Unimap), Centre of Excellence Geopolymer and Green Technology (CeGeoGTech), Perlis, Malaysia
- Synchrotron Light Research Institute (SLRI), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand
- ”Gheorghe Asachi” Technical University, Faculty of Materials Science and Engineering, Blvd. D. Mangeron 71, 700050 Lasi, Romania
- National Metal and Materials Technology Center (MTEC), 114 Thailand Science Park, Phaholyothin Road, Klong 1, Klongluang, Pathumthani 12120, Thailand
- Czestochowa University of Technology, Department of Physics, 42-200, Czestochowa, Poland