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Nitrogen adsorption method for determining the mesopore slit-like size distribution of expansive soils

机译:氮吸附法测定膨胀土中孔细缝状尺寸分布

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摘要

One of the most important structural parameters involved in the characterization of the void space of soils is the pore size distribution. In this work, a nitrogen adsorption method is presented as an alternative to determine the mesopore contribution of slit-shaped pores to the abovementioned parameter in montmorillonite-containing soils. The mesopore size structural parameter obtained via this sorption method is related to montmorillonite d_(001) interlayer distances proceeding from either X-ray or electron diffraction analysis, if only by assuming during sorption analysis that mesopores resident inside clay grains adopt slit-shaped geometries. Mineralogical analysis and determination of some important geotechnical properties of these montmorillonite-containing soils complement the preceding sorption and structural studies.
机译:表征土壤空隙空间最重要的结构参数之一是孔径分布。在这项工作中,提出了一种氮吸附方法作为替代方法,以确定含蒙脱土的土壤中缝状孔对上述参数的介孔贡献。通过这种吸附方法获得的中孔尺寸结构参数与从X射线或电子衍射分析得出的蒙脱石d_(001)层间距离有关,前提是仅在吸附分析过程中假设驻留在粘土颗粒内部的中孔采用狭缝形几何形状。矿物学分析和确定这些含蒙脱土的土壤的一些重要岩土特性补充了先前的吸附和结构研究。

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