Experimental study on disintegration resistance of clay improved by biological glue
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(1.Key Laboratory of Earth Fissures Geological Disaster, Ministry of Natural Resources (Geological Survey of Jiangsu Province), Nanjing 210018, China;2.China Development Bank Jiangsu Branch, Nanjing 210024, China;3.School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China)

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TU432

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    Abstract:

    In order to study the anti-disintegration properties of biological glue modified clay, xanthan gum, guar gum, and mixed composite glue of xanthan gum and guar gum mass with ratio of 1∶1 were used to improve the clay. Through the anti-disintegration test, the effects of biological glue content, type and compaction degree on the anti-disintegration properties of improved clay were investigated, and the improvement mechanism of biological glue was further analyzed by scanning electron microscopy test. The results show that the biological glue enhances the anti-disintegration property of the sample by enhancing the cohesion between soil particles. The collapse failure process can be divided into the pre-stable collapse stage, stable collapse stage and post-stable collapse stage. With the increase of biological glue content, the disintegration stage of the improved clay is prolonged, the disintegration rate slows down, and the disintegration rate decreases. The disintegration resistance of the modified composite adhesive is stronger than that of single biological adhesive when the content is greater than 1.0%. With the increase of compaction degree, the disintegration resistance of the sample is obviously improved.

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卢毅,赵洪岩,蔡田露,等.生物胶改良黏土抗崩解特性试验研究[J].河海大学学报(自然科学版),2024,52(3):64-71.(LU Yi, ZHAO Hongyan, CAI Tianlu, et al. Experimental study on disintegration resistance of clay improved by biological glue[J]. Journal of Hohai University (Natural Sciences),2024,52(3):64-71.(in Chinese))

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History
  • Received:July 06,2023
  • Revised:
  • Adopted:
  • Online: May 24,2024
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