effect of pore water chemistry on anisotropic behavior of clayey soil and possible application in underground construction

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ID: 157145
2016
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Ranked #9 of 12 articles by views in Malawi medical journal : the journal of Medical Association of Malawi

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Abstract
The effect of pore water chemistry on anisotropic behavior of consolidation and shear strength of reconstituted Ariake clay has been investigated experimentally. Two types of chemicals added into the pore water of the soil for enhancing flocculation microstructure of soil particles are sodium chloride (salt) (NaCl), and calcium chloride (CaCl2); and two dispersants added are sodium triphosphate (Na5P3O10) and sodium hexametaphosphate (Na6P6O18), respectively. The concentrations of these chemicals in pore water were 2–3%. Degrees of anisotropy of the coefficient of consolidation and undrained shear strength decreased with adding NaCl and CaCl2, but increased with adding the dispersants. Degree of anisotropy also increased with one-dimensional (1D) deformation and the samples with dispersive additives had higher increase rate. It has been confirmed qualitatively by scanning electron microscopy (SEM) images that adding dispersive chemicals promoted the formation of dispersive microstructure and increased the degree of anisotropy, and the chemicals enhancing flocculent microstructure had an inverse effect. The possible application of the findings to underground construction has been discussed also.
Reference Key
chai2016undergroundeffect Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Jinchun Chai;Takehito Negami;Kosuke Aiga;Takenori Hino
Journal Malawi medical journal : the journal of Medical Association of Malawi
Year 2016
DOI
10.1016/j.undsp.2016.11.002
URL
http://www.sciencedirect.com/science/article/pii/S2467967416300216
Keywords
anisotropy shear strength clay consolidation underground construction rock mechanics underground constructionengineering geology

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