S. Mingione , D. Jansen , F. Winnefeld , S.V. Churakov , B. Lothenbach
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引用次数: 0
摘要
硅灰石在水热条件下形成，在770 ~ 800℃大气压下脱水成β-硅灰石。硅钙石的溶解度鲜为人知，因为文献中报道的实验数据集相差多达10个对数单位。通过欠饱和溶解实验，研究了温度（7、20、50和80℃）对硬硅橄榄石溶解度的影响。导出的溶解度数据与文献中报道的合成硬硅钙石在25°C下的溶解度数据相当，而文献中报道的天然硬硅钙石更高的溶解度似乎描述了无定形C- s - h的溶解度。硅钙石的溶解度在较低温度下适度提高。在7℃时，发现硅钙石与托贝莫来石共存。
Effect of temperature on the solubility of xonotlite
Xonotlite forms under hydrothermal conditions and it dehydrates to β-wollastonite between 770 and 800 °C under atmospheric pressure. The solubility of xonotlite is poorly known, as the experimental datasets reported in literature differ by as much as 10 log units. This study investigates the impact of temperature (7, 20, 50 and 80 °C) on the solubility of xonotlite by dissolution experiments from undersaturation. The derived solubility data are comparable to those reported in literature at 25 °C for synthesized xonotlite, while the much higher solubility reported in literature for natural xonotlite seems to describe the solubility of amorphous C-S-H. The solubility of xonotlite increases moderately at lower temperature. At 7 °C, xonotlite was found to co-exist with tobermorite.
期刊介绍：
Cement and Concrete Research is dedicated to publishing top-notch research on the materials science and engineering of cement, cement composites, mortars, concrete, and related materials incorporating cement or other mineral binders. The journal prioritizes reporting significant findings in research on the properties and performance of cementitious materials. It also covers novel experimental techniques, the latest analytical and modeling methods, examination and diagnosis of actual cement and concrete structures, and the exploration of potential improvements in materials.
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