SGER: Evaluation and Modeling of Interlayer Forces in Montmorillonite For Development of a Particulate Based Model for Swelling Clays

粘土与水和其他环境流体的相互作用的理解、模拟和预测是岩土工程、地质环境工程以及石油钻井和水处理泥浆等工业应用领域的一个重要问题。饱和蒙脱石在抑制膨胀时的膨胀响应和相应的膨胀压力的发展是相当复杂的相互作用的结果，a)粘土颗粒之间的相互作用和b)颗粒之间的相互作用。实验、分析和计算力学领域的最新进展将使PI能够模拟和模拟这些复杂的相互作用，并允许使用离散元方法(DEM)预测溶胀响应。PI计划同时考虑层间和颗粒间的相互作用。层间相互作用包括硅水界面的氢键作用和层间水分子之间的氢键作用。本文的重点是了解和模拟蒙脱石粘土在水化和膨胀过程中的重要层间力，为基于颗粒的膨胀粘土模型的发展奠定基础。分析表征技术[傅里叶变换红外光谱(FTIR)、X射线衍射和扫描电子显微镜(SEM)]和经典物理作用力的解析描述将被用于实现DEM。

The understanding, modeling and prediction of interaction of clays with water and other environmental fluids is an important issue in the field of geotechnical engineering, geoenvironmental engineering as well as industrial applications such as muds for oil well drilling and water treatment. The swelling response of saturated montmorillonite and the corresponding development of swelling pressure when swelling is restrained is the result of fairly complex interactions a) within the interlayers of the clay particle and b) the interactions between the particles. The recent advances in experimental, analytical and computational mechanics areas will allow the PIs to model and simulate these complex interactions and allow for prediction of the swelling response using Discrete Element Method (DEM). The PIs plan to consider both the interlayer and interparticle interactions. The interlayer interactions will include silica-water interactions including hydrogen bonding at silica-water interface and the hydrogen bonding between water molecules in the interlayers.This focus of this work is to understand and model the significant interlayer forces in montmorillonite clay during hydration and swelling to provide a foundation for the development of particulate based models for swelling clays. A combination of analytical characterization techniques [Fourier transform infrared spectroscopy (FTIR), X-ray diffraction and scanning electron microscopy (SEM)] and analytical description of forces from classical physics will be used for implementation into DEM.