Effect of Heat Treatment on Soil Mechanical Properties

• Main Authors: Lee, Cheng-Hsi, 李承熹
• Other Authors: Weng, Meng-Chia
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/m2wsdy

碩士 === 國立高雄大學 === 土木與環境工程學系碩士班 === 105 === Many oil-contaminated sites are located in densely populated areas, affecting the surrounding environment and public health, to ensure the sustainable use of land and groundwater resources, remediation for oil-contaminated sites is essential. Heat treatment technology for oil-contaminated site is widely used. But, after the heat treatment, soil physical and chemical properties have been subject to a certain degree of change. Before re-use, it is necessary to understand the permeability and mechanical properties of the changes. In this study, experimental samples were add oils to soil from the Kaohsiung refinery area to investigate the removal rate of total petroleum hydrocarbons (TPHs) by thermal desorption and incineration. The soil physical properties, water permeability and mechanical properties of the soil before and after the heat treatment were compared. The results of this study are summarized as follows: (1)The results of the sieve analysis show that the soil particles after the heat treatment become finer; (2) In the burning reduction test, the heat treatment with 900 ℃ removes THP more than 90% (3) According to the results of the direct shear test, the friction angle (φ) increases with the removal rate increase. (4) The hydraulic test shows that when the removal rate increase, the permeability coefficient raised. After the heat treatment, the oil concentration of high permeability is greater than the low oil concentration.