Dependency of thermal properties of clayey soils on salt concentration

粘土热特性对盐浓度的依赖性

• 批准号: 23658194
• 负责人: NOBORIO Kosuke
• 金额: $ 2.66万
• 依托单位: Meiji University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23658194/
• 关键词: 粘土鉱物; DPHP法; 熱的性質; 熱伝導率; 体積熱容量; 熱拡散係数; NaCl溶液濃度; CaCl2溶液濃度; モデル; 塩類; 熱伝導係数; 拡散2重層; サーモTDRプローブ; 凝集構造; 分散; 塩水

Thermal properties, thermal conductivity, volumetric heat capacity, and thermal diffusivity, were measured for soils containing different clay minerals, montmorillonite, kaolinite, and allophone, moistened with several concentrations of NaCl or CaCl2 solutions using a dual-probe heat-pulse, DPHP, technique. Thermal conductivity and thermal diffusivity for all soils moistened with NaCl solution showed a dip decrease at 0.05 mol/L. This may be resulted from altering arrangement of clay minerals due to salt solutions. For soils moistened with other concentrations of NaCl or CaCl2 solution, thermal properties decrease with increases in concentrations. A 2-D F.E.M. model revealed that alternation of clay mineral arrangement hindered heat flow.

用双探针式热脉冲DPHP技术，测量了含有不同粘土矿物、蒙脱石、高岭石和变色剂的土壤的热物性、导热系数、体积热容和热扩散率。所有土壤的导热系数和热扩散率均在0.05mol/L时下降，这可能是由于盐溶液改变了粘土矿物的排列所致。对于用其他浓度的氯化钠或氯化钙溶液润湿的土壤，热性质随着浓度的增加而降低。二维有限元模型显示，粘土矿物排列的变化阻碍了热流。

项目成果

Effects of salts solutions on thermal conductivity of clayey soils

盐溶液对粘土导热系数的影响

• 发表时间: 2014
• 作者: Shinsuke AOKI;SHUTO SHIBUYA and Kosuke NOBORIO
• 通讯作者: SHUTO SHIBUYA and Kosuke NOBORIO

2014. Effects of salts solutions on thermal conductivity of clayey soils

2014.盐溶液对粘土导热系数的影响

• 发表时间: 2014
• 作者: Aoki;S.;S. Shibuya;and K. Noborio
• 通讯作者: and K. Noborio

Does Clay Structure Affect Heat Transfer in Salt-Affected Soil?

粘土结构是否影响受盐土壤中的传热？

• 发表时间: 2012
• 作者: Noborio;K.;and S. Aoki
• 通讯作者: and S. Aoki