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Microstructure and mechanical properties of geopolymers with different dolomitic lime contents
- Source :
- Revista IBRACON de Estruturas e Materiais, Vol 18, Iss 1 (2024)
- Publication Year :
- 2024
- Publisher :
- Instituto Brasileiro do Concreto (IBRACON), 2024.
-
Abstract
- Abstract This study investigated the effect of dolomitic lime incorporation on the microstructure and mechanical properties of metakaolin-based geopolymers activated by alkaline solution. Five geopolymer mixtures were prepared with the addition of 0.0%, 2.5%, 5.0%, 7.5%, and 10.0% dolomitic lime. The microstructure of the geopolymers was evaluated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction analyses (XRD). The compressive strength of the mixtures ranged between 53.2 and 63.0 MPa after 28 days of ambient curing. SEM/EDS analyses showed that the main phases formed were the N-A-S-H gel together with the C-A-S-H and N-M-A-S-H gels in the mixtures with dolomitic lime. In summary, the results showed that the incorporation of dolomitic lime can significantly improve the microstructure and properties of geopolymers.
Details
- Language :
- English
- ISSN :
- 19834195
- Volume :
- 18
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Revista IBRACON de Estruturas e Materiais
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.390650e8e81f479b85f6322e497b3c7b
- Document Type :
- article
- Full Text :
- https://doi.org/10.1590/s1983-41952025000100001