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本文运用图象分析的方法,从统计角度研究了粉煤灰与石灰混合干磨与混合湿磨制品显微结构的差别,提出了有效托贝莫来石及有效托贝莫来石系数的定量表达式。在对比实验和晶体生长理论的基础上,指出了混合湿磨过程中生成的水化硅酸钙具有“晶核”作用。由于生长的晶核对离子具有“优先吸附”的界面作用和“优先沉淀”的结晶中心作用,克服了水热合成产物优先在孔中生长的局部化现象,减少了无效托贝莫来石数量;缓和了高浓度屏蔽作用及界面近程析晶作用,从而加速了粉煤灰、石灰、石膏的水热反应,提高了制品强度。
In this paper, the image analysis method was used to statistically study the difference between the microstructures of fly ash and lime mixed dry and mixed wet-milling products, and the quantification of effective tobe-mullite and effective tobebe mullite coefficients was proposed. expression. Based on the comparison experiment and the theory of crystal growth, it was pointed out that the calcium silicate hydrate produced during the mixed wet grinding process has a “nucleation” effect. Because the growing nucleus has a “preferential adsorption” interface effect and a “preferential precipitation” crystallization center effect on the ions, the localization of hydrothermal synthesis products preferentially growing in the pores is overcome, and the number of ineffective tobemelite is reduced; The high concentration shielding effect and the short-range crystallization of the interface are mitigated, thereby accelerating the hydrothermal reaction of fly ash, lime, and gypsum and improving the strength of the product.