Comparative mechanical and microstructural properties of high calcium fly ash one-part geopolymers activated with Na2SiO3-anhydrous and NaAlO2
نویسندگان
چکیده
This paper investigates the effect of varying solid alkali activators on fresh and hardened properties microstructural changes one-part geopolymers (OPGs). Single binary were used to activate high calcium fly ash. The either solely sodium metasilicate (Na2SiO3) or a combination aluminate (NaAlO2) (Na2SiO3). OPG activated with anhydrous Na2SiO3 achieved an excellent 28-day compressive strength 83.6 MPa while NaAlO2 attained 45.1 MPa. Na2SiO3-activated demonstrated better fluidity than due thixotropic behaviour caused by NaAlO2. consisted sodium-calcium aluminium silicate hydrate ((N,C)-A-S-H) gel phase, comprised coexistence (N-A-S-H) (C-A-S-H) phases. Regardless distinctive properties, OPGs are adequate for building materials applications.
منابع مشابه
Microstructural Characteristics of Geopolymers Based on Alkali-Activated Fly Ash
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ژورنال
عنوان ژورنال: Journal of materials research and technology
سال: 2021
ISSN: ['2238-7854', '2214-0697']
DOI: https://doi.org/10.1016/j.jmrt.2021.10.018