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Abstract

Preparation and Characterization of Xonotlite Whiskers Based on Fly Ash

Author(s): Han Jiahui and Xu Peng*

This paper discusses the preparation process of hydrothermal synthesis of xonotlite whisker with fly ash desiliconization solution as silicon source and high-quality lime milk as calcium source. The results show that the concentration of desiliconized filtrate SiO2 is 63.21 g/L, the concentration of refined lime milk CaO is 186.49 g/L, the molar ratio of calcium to silicon is 1.0, the water-solid ratio is controlled to 40:1, and the temperature is evenly raised to 240℃ within 120 minutes, then kept at 240 min to ensure the reaction fully. Then it was cooled to room temperature, and after filtering, washing, and drying, xonotlite whisker product with an aspect ratio of 100 to 400 was obtained.


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