Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures

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Gravels and coarse sands make up significant portions of some environmentally important sediments, while the hydraulic properties of the sediments are typically obtained in the laboratory using only the fine fraction (e.g., <2 mm or 4.75 mm). Researchers have found that the content of gravel has significant impacts on the hydraulic properties of the bulk soils. Laboratory experiments were conducted to measure the porosity and the saturated hydraulic conductivity of binary mixtures with different fractions of coarse and fine components. We proposed a mixing-coefficient model to estimate the porosity and a power-averaging method to determine the effective particle diameter and ... continued below

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Zhang, Z. F.; Ward, Anderson L. & Keller, Jason M. September 27, 2009.

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Description

Gravels and coarse sands make up significant portions of some environmentally important sediments, while the hydraulic properties of the sediments are typically obtained in the laboratory using only the fine fraction (e.g., <2 mm or 4.75 mm). Researchers have found that the content of gravel has significant impacts on the hydraulic properties of the bulk soils. Laboratory experiments were conducted to measure the porosity and the saturated hydraulic conductivity of binary mixtures with different fractions of coarse and fine components. We proposed a mixing-coefficient model to estimate the porosity and a power-averaging method to determine the effective particle diameter and further to predict the saturated hydraulic conductivity of binary mixtures. The proposed methods could well estimate the porosity and saturated hydraulic conductivity of the binary mixtures for the full range of gravel contents and was successfully applied to two data sets in the literature.

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  • Report No.: PNNL-18801
  • Grant Number: AC05-76RL01830
  • DOI: 10.2172/1016457 | External Link
  • Office of Scientific & Technical Information Report Number: 1016457
  • Archival Resource Key: ark:/67531/metadc830747

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  • September 27, 2009

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Nov. 23, 2016, 3:12 p.m.

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Zhang, Z. F.; Ward, Anderson L. & Keller, Jason M. Determining the Porosity and Saturated Hydraulic Conductivity of Binary Mixtures, report, September 27, 2009; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc830747/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.