Engineered Water Repellency for Frost Mitigation: Practical Modeling Considerations
Engineered Water Repellency for Frost Mitigation: Practical Modeling Considerations
复制标题
用于缓解霜冻的工程防水性：实际建模考虑因素
DOI：
10.1061/9780784483701.037
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Cetin, Bora
中科院分区：
文献类型：
--
作者：
Daniels, John L.;Langley, William G.;Uduebor, Michael;Cetin, Bora
工程防水性具有减轻道路和地基等岩土系统中的冻胀的潜力。模型可用于通知设计方法和预测性能;文献中充满了霜冻作用的一般模型。关于如何将矿物表面、孔隙流体组成和工程防水性实际纳入热-水-机械-化学（THMC）模型的报道相对较少。这种模型的一个方面涉及到描述状态的孔隙流体在冻结边缘和未冻结的土壤下的冲击冻结前和生长的冰透镜。当冰的形成降低了水分含量，同时增加了剩余的未冻结孔隙流体中的离子浓度时，产生了毛细梯度和渗透梯度。这里报告的工作是一个更大的努力，以量化的相对作用渗透和基质的潜力对霜冻，同时探索使用有机硅烷，以减轻冰透镜的形成和增长的一部分。作为一个先驱，将更广泛的物理化学过程中的霜冻行动，本文回顾了不饱和流动的接触角变化的敏感性。非饱和流梯度的创建响应于模拟基质，渗透和低温吸力在一个二维模型。结果表明，接触角的增加导致不饱和流的减少，无论诱导梯度。
Engineered water repellency has the potential to mitigate frost heave in geotechnical systems such as roads and foundations. Models can be used to inform design approaches and predict performance; the literature is replete with general models of frost action. There are comparatively fewer reports on how to practically incorporate the effect of mineral surfaces, pore fluid composition, and engineered water repellency into thermo-hydro-mechanical-chemical (THMC) models. An aspect of such models involves describing the state of pore fluid in the frozen fringe and unfrozen soil beneath an impinging freezing front and growing ice lens. Capillary and osmotic gradients are created as ice formation reduces moisture content while increasing the concentration of ions in the remaining unfrozen pore fluid. The work reported here is part of a larger effort to quantify the relative role of osmotic and matric potential on frost heaving, while exploring the use of organosilanes to mitigate ice lens formation and growth. As a precursor to incorporating the broader array of physicochemical processes in frost action, this paper reviews the sensitivity of unsaturated flow to changes in contact angle. Unsaturated flow gradients are created in response to simulated matric, osmotic, and cryogenic suction within a two-dimensional model. Results indicate that an increased contact angle results in a reduction in unsaturated flow, regardless of induced gradient.
影响因子：
3.6
作者：
Robert E Tester;P. Gaskin
通讯作者：
Robert E Tester;P. Gaskin
影响因子：
2
作者：
Mahedi, Masrur;Satvati, Sajjad;Daniels, John L.
通讯作者：
Daniels, John L.