Engineered Water Repellency for Mitigating Frost Action in Iowa Soils
Engineered Water Repellency for Mitigating Frost Action in Iowa Soils
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用于减轻爱荷华州土壤霜冻作用的工程防水性
DOI：
10.1061/9780784484012.046
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Wasif Naqvi, Mohammad
中科院分区：
文献类型：
--
作者：
Brooks, Ty;Daniels, John L.;Uduebor, Micheal;Cetin, Bora;Wasif Naqvi, Mohammad
有机硅烷（OS）改性已被实验证明，使土壤防水。工程防水性在岩土工程和地质环境应用中具有广泛应用的潜力。其中一个应用是减轻易受影响的路基土壤中的霜冻作用的影响，特别是对于未结合的未铺路面的道路。作为评估此类道路施工后处理可行性的更大项目的一部分，使用两种不同剂量的市售OS产品进行了测试。本文总结了从爱荷华州不同地区收集的四个易冻土壤样品的处理、表观接触角和进水水头之间的实验观察关系。土壤水分特征曲线被用来估计占主导地位的孔隙大小，并涉及到一个给定的样品的水进入头。用两种不同的OS化学品改性产生的表观接触角在119°和143°之间。确定入水水头范围为15至63 cm水柱。平均孔隙半径与入水水头呈反比关系。这些结果预计将是有用的机构感兴趣的评估工程防水性用于新的建设以及修复现有的基础设施下的霜冻敏感的土壤。
Organo-silane (OS) modification has been shown experimentally to render soil water repellent. Engineered water repellency has the potential for widespread use in geotechnical and geoenvironmental applications. One such application is mitigating the effects of frost action in susceptible subgrade soils, particularly for unbound, unsurfaced roads. As part of a larger project to evaluate the feasibility of post-construction treatment of such roads, testing was performed with two commercially available OS products at varying dosages. This paper summarizes experimentally observed relationships between treatment, apparent contact angle, and water entry head for four samples of frost-susceptible soil collected from different regions across Iowa. Soil water characteristic curves were used to estimate the prevailing pore size and to relate that to water entry head for a given sample. Modification with two different OS chemicals yielded apparent contact angles between 119° and 143°. The water entry head was determined to range from 15 to 63 cm of water. Inverse relationships were observed between average pore radius and water entry head. These results are expected to be useful to agencies interested in evaluating engineered water repellency for use in new construction as well as rehabilitation of existing infrastructure underlain by frost susceptible soils.
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