Water migration in unsaturated partially hydrophobic soils
Water migration in unsaturated partially hydrophobic soils
复制标题
不饱和部分疏水性土壤中的水迁移
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
B. Caicedo
中科院分区：
文献类型：
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作者：
L. Orozco;B. Caicedo
本文提出了关于疏水颗粒对细粒土壤中水迁移的影响的新见解。本研究的实验装置使用装有传感器的土壤柱来测量毛细管上升、施加压力下的渗透和排水过程中土壤的含水量。土壤中混有特氟龙（聚四氟乙烯（PTFE））微粒。测量具有三种不同百分比的疏水颗粒的混合物的保水曲线：0、2和5重量%。另外，使用水侵入试验来测定PTFE粒子的斥水曲线。这项研究的结果表明，疏水性颗粒对毛细管上升有显着影响，但在施加压力时防水性会降低。这项研究提供了一项新的调查，可能有助于了解土壤疏水化的好处和局限性。
This paper presents new insights into the effects of hydrophobic particles on water migration in fine-grained soils. The experimental set-up for this study uses columns of soil instrumented with sensors to measure the water content of soil during capillary rise, infiltration under imposed pressure and drainage. The soil was mixed with microparticles of Teflon (Polytetrafluoroethylene (PTFE)). The water retention curve was measured for mixtures with three different percentages of hydrophobic particles: 0, 2 and 5% by weight. Moreover, the water repulsion curve of the PTFE particles was measured using the water intrusion test. The results of this study show a significant effect of hydrophobic particles on capillary rise, but water repellency decreases when imposing a pressure. This study provides a new survey that could be useful for understanding the benefits and limitations of soil hydrophobisation.