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Experimental Investigation of Consolidation Properties of Nano-Bentonite Mixed Clayey Soil

Author

Listed:
  • Gang Cheng

    (School of Computer Science, North China Institute of Science and Technology, Beijing 101601, China
    School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China)

  • Hong-Hu Zhu

    (School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China)

  • Ya-Nan Wen

    (School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
    Tunnel Design Institute, China Design Group Co., Ltd., Nanjing 210014, China)

  • Bin Shi

    (School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China)

  • Lei Gao

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China)

Abstract

As a new soil improvement method, adding nano-bentonite can enhance the engineering properties of soil. To study the stabilization effect of nano-bentonite on soil consolidation properties, a series of one-dimensional odometer tests were conducted on a clayey soil with different nano-bentonite mixing contents (i.e., 0.5%, 1%, 1.5%, and 2%). The effects of nano-bentonite on the coefficient of consolidation and permeability of the test soil were analyzed. The results show that adding a certain amount of nano-bentonite does not significantly affect the original consolidation characteristics of soil samples, but displays a notable effect on accelerating water drainage. Among all the soil samples, when the nano-bentonite mixing content is 0.5%, the final compression amount is the largest and the final void ratio is the smallest. The coefficients of consolidation and permeability increase with increasing nano-bentonite mixing content under high stress state. The test results indicate that nano-bentonite can facilitate internal cementation of soil particles, which effectively reduces the compressibility of clayey soil.

Suggested Citation

  • Gang Cheng & Hong-Hu Zhu & Ya-Nan Wen & Bin Shi & Lei Gao, 2020. "Experimental Investigation of Consolidation Properties of Nano-Bentonite Mixed Clayey Soil," Sustainability, MDPI, vol. 12(2), pages 1-15, January.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:2:p:459-:d:306052
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    Cited by:

    1. Yu-Ping Wang & Zhe Wang & Yu Zhao & Fa-Cheng Yi & Bao-Long Zhu, 2021. "Swelling Properties and Permeability of GMZ Bentonite-Sand Mixtures during Different Solutions Infiltration," Sustainability, MDPI, vol. 13(4), pages 1-12, February.

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