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Effect of Nano-SiO2 on the Geotechnical Properties of Cohesive Soil

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Abstract

With the reduction of available land resources, the construction of civil engineering structures is carried out on soft soil, which leads to the development of ground improvement techniques such as soil stabilization. This research is intended to study the effect of adding nano-SiO2 on soil engineering properties, especially the shear strength and the unconfined compression strength and maximum dry unit weight, using clayey soil with low liquid limit (CL). Nano-SiO2 was mixed with soil in three different percentages (i.e. 0.5, 0.7, 1.0 % by weight of the parent soil). The shear strength, unconfined compression strength and maximum dry unit weight of treated specimens were measured by direct shear test, unconfined compression test and compaction test. It was found that increase in nano-SiO2 content resulted in increase in the angle of internal friction, the cohesion, the unconfined compression strength and maximum dry unit weight of the clayey soil. Based on the obtained results, in order to reach the maximum increase in strength parameters, the optimum nano-SiO2 content occurs at 0.7 %.

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Acknowledgments

This study has performed in “soil mechanical laboratory” of Semnan University. The authors appreciate the Head of Soil Mechanics Laboratory of Semnan University, Mr. Doost Mohammadi for his cooperation in this research.

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Authors and Affiliations

  1. Department of Civil Engineering, Semnan University, Semnan, Iran

    Foad Changizi & Abdolhosein Haddad

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  1. Foad Changizi
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  2. Abdolhosein Haddad
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Correspondence to Foad Changizi.

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Changizi, F., Haddad, A. Effect of Nano-SiO2 on the Geotechnical Properties of Cohesive Soil. Geotech Geol Eng 34, 725–733 (2016). https://doi.org/10.1007/s10706-015-9962-9

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  • DOI: https://doi.org/10.1007/s10706-015-9962-9

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