The Compressive Strength and Microstructure of Alkali-Activated Mortars Utilizing By-Product-Based Binary-Blended Precursors
نویسندگان
چکیده
Researchers have investigated the feasibility of using ultrafine palm oil fuel ash (u-POFA) as a cement replacement material because its potential to reduce environmental impact concrete production. u-POFA, by-product combustion, is suitable for Portland in mixes sustainability and cost-effectiveness. This study microstructural compressive strengths alkali-activated mortars (AAMs) based on fly (FA) granulated blast-furnace slag (GBFS) being added with varying percentages u-POFA. The mixture samples were prepared eighteen sodium metasilicate (Na2SiO3) source hydroxide (NaOH) alkaline activator. used field-emission scanning electron microscopy coupled energy-dispersive X-ray spectrometry, diffraction, fluorescence, Fourier-transform infrared spectroscopy characterize binary-blended after 28 days curing determined strength FA+GBFS (87.80 MPa), u-POFA+GBFS (88.87 u-POFA+FA (54.82 MPa). mortars’ was influenced by CaO/SiO2 SiO2/Al2O3 ratios mixture, which directly due formation rate geopolymer products calcium–alumina–silicate–hydrate (C–(A)–S–H), aluminosilicate (N–A–S–H), calcium–silicate–hydrate (C–S–H) phases. Based contents FA GBFS, u-POFA significantly enhanced strength; therefore, proportion could enhance AAMs’ microstructure.
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ژورنال
عنوان ژورنال: Applied mechanics
سال: 2023
ISSN: ['2673-3161']
DOI: https://doi.org/10.3390/applmech4030046