On the Solubilities of Anhydrite and Gypsum

摘要：

　　Claystones containing finely distributed anhydrite swell due to water uptake.Experience shows that the swelling may cause considerable damage and lead to high repair costs.During tunnel excavation,a change in the field conditions occurs,causing the dissolution of anhydrite into its ions and the subsequent precipitation of gypsum crystals.The formation of the latter is (together with water uptake by the clay minerals) the cause of the swelling process.Identifying the conditions under which anhydrite or gypsum is the stable phase is crucial for understanding the process.The current paper presents a thermodynamic model for the individual assessment of anhydrite and gypsum solubilities by additionally considering the partial contact stress between the minerals.The model is verified with experimental and theoretical results from the literature.

作者: Serafeimidis Konstantinos Anagnostou Georg

作者单位: ETH Zurich Switzerland

会议类型: 国际会议

会议名称: The Second International Symposium on Constitutive Modeling of Geomaterials: Advances and New Applications (第二届国际岩土本构模型研讨会(IS-Model 2012))

会议地点: 北京

会议语种:英文

页码: 333-339

在线出版日期: 2012-10-15（万方平台首次上网日期，不代表论文的发表时间）