This study investigates factors influencing the hydration of ye'elimite, comparing stoichiometric ye'elimite-rich clinkers with and without free lime (Y-C and Y, respectively). Although the hydration sequences and products were similar, there were notable differences in their kinetics. Y-C exhibited rapid hydration upon contact with water, followed by a significant slowdown within minutes. Contrary, Y demonstrates a slower early hydration, but reached the main hydration period earlier and proceeded more rapidly thereafter. Solution analyses revealed higher initial calcium and aluminium concentrations for Y-C, while the sulfur concentration was reduced. This was attributed to the rapid dissolution of free lime, along with some ye'elimite, resulting in the instantaneous formation of ettringite and aluminium hydroxide. Consequently, the solution composition was altered, causing delayed onset of monosulfate formation and main hydration period. These findings contribute to understanding the hydraulic reactivity of ye'elimite and its potential implications for cement production processes.

中文翻译：

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叶极限水化动力学的影响因素游离石灰的作用

本研究调查了影响 ye'elimite 水化的因素，比较了含有和不含游离石灰（分别为 YC 和 Y）的化学计量富含 ye'elimite 的熟料。尽管水合顺序和产物相似，但其动力学存在显着差异。 YC 与水接触后表现出快速水合作用，然后在几分钟内显着减慢。相反，Y 表现出较慢的早期水化，但较早达到主要水化阶段并且此后进行得更快。溶液分析显示 YC 的初始钙和铝浓度较高，而硫浓度降低。这是由于游离石灰和一些叶酸钙的快速溶解，导致钙矾石和氢氧化铝的瞬时形成。因此，溶液组成发生改变，导致单硫酸盐形成和主要水合期的开始延迟。这些发现有助于了解 ye'elimite 的水硬反应性及其对水泥生产过程的潜在影响。