Influence of Gas Oil Contamination on Geotechnical Properties of Fine and Coarse-Grained Soils

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• 作者：Sayed Alireza Nasehi ; Ali Uromeihy…
• 关键词：Clay ; Silt ; Sand ; Gas oil ; Contamination ; Geotechnical properties
• 刊名：Geotechnical and Geological Engineering
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：1
• 页码：333-345
• 全文大小：3,309 KB
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• 作者单位：Sayed Alireza Nasehi (1)
  Ali Uromeihy (1)
  Mohammad Reza Nikudel (1)
  Ali Morsali (2)
  
  1. Department of Geology, Faculty of Basic Science, Tarbiat Modares University, Tehran, Iran
  2. Department of Chemistry, Faculty of Basic Science, Tarbiat Modares University, Tehran, Iran
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geotechnical Engineering
  Hydrogeology
  Terrestrial Pollution
  Waste Management and Waste Technology
  Civil Engineering
  
• 出版者：Springer Netherlands
• ISSN：1573-1529

文摘

Contamination of soil by the leakage of gas oil may affect its physical, chemical and mechanical properties. There are many ways which could enhance the leakage of gas oil including; corroded storage tanks, processing plants and petroleum transportation. The aim of this paper is to consider the effect of gas oil contamination on the geotechnical properties of some soil specimens such as poorly graded sand (SP), low plasticity clay and silt (CL, ML). The uncontaminated specimens have undergone some basic laboratory tests such as plasticity, compaction, unconfined compression strength (UCS) and direct shear tests. The samples artificially contaminated with 3, 6 and 9 % of gas oil in relative to their dry weight. Results indicate a decrease in the friction angle and an increase in the cohesion of the soils with the increase of gas oil content. In addition, a reduction in the maximum dry density and optimum moisture content observed during the conduction of compaction test. The increase of gas oil percentage also showed a direct effect on the increases of liquid and plastic limits of clay and silt soils. On the other hands, the increase of gas oil percent reversely effect on the UCS of silt soil. According to the field emission scanning electron microscopy study, it can be stated that the increase of clay particles extends the rate of fabric flocculation is a key factor for increasing the unconfined compression strength in clayey soil. Keywords Clay Silt Sand Gas oil Contamination Geotechnical properties