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Experimental Study on Dynamic Properties of Nano-MgO-Modified Silty Clay

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International Journal of Geosynthetics and Ground Engineering Aims and scope Submit manuscript

Abstract

To study the dynamic properties of nano-MgO-modified soil, the contents of nano-MgO which were 0%, 1%, 2%, 3%, 4% and 5% of the dry weight for soil were added into the soil. The water content of soil samples were 16% and 22%. The variation of shear modulus and damping ratio of soil was analyzed through the resonant-column test of the modified soil. The results show that with the increasing of shear strain, the shear modulus of soil decreases and the damping ratio of soil increases, the shear modulus for nano-MgO-modified soil reaches the maximum when the content of nano-MgO is 5%. The maximum shear modulus of soil with water content of 22% is smaller than that of soil with water content 16% under the same confining pressure, the shear modulus of soil increases linearly with the increasing of nano-MgO content. The reinforcement mechanism of the nano-MgO-modified soil was analyzed such as pore filling effect of nano-MgO, effect of water content, effect of vibration compaction, interaction between a nano-MgO group and a soil particle, interaction between several nano-MgO groups and soil particles.

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Acknowledgements

Financial support comes from the National Natural Science Foundation of China (Grant No. 51508159), the Fundamental Research Funds for the Central Universities of Hohai University (No. 2019B12914), the Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University (No. GHXN201904) are gratefully appreciated.

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

    Lei Gao, Yi Luo, Zhen Ren, Xiangjuan Yu & Kexiong Wu

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  1. Lei Gao
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  2. Yi Luo
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  3. Zhen Ren
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  4. Xiangjuan Yu
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Gao, L., Luo, Y., Ren, Z. et al. Experimental Study on Dynamic Properties of Nano-MgO-Modified Silty Clay. Int. J. of Geosynth. and Ground Eng. 6, 27 (2020). https://doi.org/10.1007/s40891-020-00210-5

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