Building up and Characterization of Calcined Marl-Based Geopolymeric Cement
作者： Galal El-Habaak , Mohamed Askalany , Mahmoud Abdel-Hakeem
DOI: 10.3390/INFRASTRUCTURES3030022
关键词:
摘要: The present study mainly investigates the synthesis of calcined marl-based geopolymeric cement under different conditions including NaOH concentration, sodium silicate (SS)/sodium hydroxide (SH) mass ratios, solid (S)/liquid (L) calcination temperatures, curing times, and aging intervals. studied head sample was obtained from Abu-Tartur phosphate mine in Western Desert Egypt subjected to chemical mineralogical characterizations using X-ray fluorescence (XRF), diffraction (XRD), Fourier transform–infrared spectroscopy (FT–IR). Regarding calcination, this conducted at 550, 650, 750, 850 °C for one hour resulted thermal decomposition calcite saponite formation new mineral phases anthophyllite, wollastonite, silica. On other hand, geopolymerization process initiated by mixing marl with alkali activation solution ratios varying conditions. compressive strength measurements indicate that 750 °C, 12 M NaOH, 0.6 SS/SH ratio, 2 S/L 80 temperature, h time, 28 days time are considered all be optimum geopolymer.
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