Water‐Entry Pressure and Friction Angle in an Artificially Synthesized Water‐Repellent Silty Soil
Water‐Entry Pressure and Friction Angle in an Artificially Synthesized Water‐Repellent Silty Soil
复制标题
人工合成憎水粉质土中的入水压力和摩擦角
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Seongyeong Yang
中科院分区：
文献类型：
--
作者：
Chang;H. Yang;T. Yun;Youngmin Choi;Seongyeong Yang
拒水土壤具有独特的水力和力学行为，在岩土工程应用中具有很大的潜力，因为颗粒尺度的表面润湿性特征显著影响宏观表现。本研究探讨了一个人工创建的防水粉质土与四个不同浓度的反应性有机硅烷溶液的水力和力学行为。进行了一系列实验室测试，包括测量水滴渗透时间（WDPT）、进水压力（WEP）、流速和摩擦角。实验结果表明，人工处理产生了一个独特的范围内的孔隙度值取决于浓度和WDPT和WEP增加与孔隙度降低和浓度增加。重量分数为40%的拒水颗粒足以使松散污垢表现出拒水性。具有高浓度的反应性有机硅烷的试样的流速往往很高，这是由于所产生的水渗透的高度饱和。相反，在干燥条件下，摩擦角倾向于随着有机硅烷溶液浓度的增加而减小，并且在润湿时保持准恒定，而不管饱和度如何。
Water‐repellent soils possess unique hydraulic and mechanical behaviors that confer large potential for their use in geotechnical applications because particle‐scale surface‐wettability characteristics significantly influence macroscale manifestations. This study examined the hydraulic and mechanical behavior of an artificially created water‐repellent silty soil with four different concentrations of a reactive organo‐silane solution. A series of laboratory tests was performed that included measurements of water‐droplet penetration time (WDPT), water‐entry pressure (WEP), flow rate, and friction angle. Experimental results showed that the artificial treatment produced a unique range of porosity values depending on the concentration and that the WDPT and WEP increased with decreasing porosity and increasing concentration. A gravimetric fraction of 40% water‐repellent particles was sufficient for bulk soils to exhibit water repellency. The flow rate of specimens with a high concentration of reactive organo‐silane tended to be high due to the resulting high degree of saturation on water permeation. In contrast, friction angles tended to decrease with increasing concentration of organo‐silane solution under dry conditions and remained quasi‐constant on wetting, regardless of the degree of saturation.