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Volume 35 Issue 11
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WAN Xu-sheng, LAI Yuan-ming. Experimental study on freezing temperature and salt crystal precipitation of sodium sulphate soulotion and sodium sulphate saline soil[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(11): 2090-2096.
Citation: WAN Xu-sheng, LAI Yuan-ming. Experimental study on freezing temperature and salt crystal precipitation of sodium sulphate soulotion and sodium sulphate saline soil[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(11): 2090-2096.
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Experimental study on freezing temperature and salt crystal precipitation of sodium sulphate soulotion and sodium sulphate saline soil

  • State Key Laboratory of Frozen Soil Engineering, Cold and Arid Region Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China

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  • Received Date: March 31, 2013
  • Published Date: November 19, 2013
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    • Abstract
  • In order to study the mechanism of salt heave and frost heave of sodium sulphate saline soil, the cooling experiments are designed for the sodium sulfate solution at -20℃ environment temperature and in changing temperature ranging from -5℃ to -10℃ and for the sodium sulphate saline soil at -20℃ temperature. It is tried to find the laws of precipitation of mirabilite in the sodium sulfate solution and the sodium sulphate saline soil and their freezing points. The experiments show that at the same environment temperature, a higher concentration of solution leads to an easier precipitation of mirabilite. In the same concentration of solution, a relatively slow environment temperature variation changes precipitation of mirabilite more easily, and the rules of freezing points of the solutions are the same. Compared with that of the sodium sulfate solution, the freezing point of the sodium sulphate saline soil is lower, and at the same environment temperature, salt crystals are more likely to precipitate in the soil.
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    • References (12)
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