Evaluating the impact of nanomaterials on soil strength parameters

Moazzami, Alireza

doi:10.22075/ijnaa.2024.33253.4952

Evaluating the impact of nanomaterials on soil strength parameters

Document Type : Research Paper

Author

Alireza Moazzami

Department of Engineering, Faculty of Civil Engineering, University of Zanjan, Zanjan, Iran

10.22075/ijnaa.2024.33253.4952

Abstract

This study investigates the impact of nanomaterials on soil strength parameters. This project is carried out according to laboratory tests to determine the impact of nano-silica on the compressive strength and plasticity properties of soil. This project covers the operation of injecting nano-silica into the remoulded soil of Yazd University region, and performing the CPT test as the executive studies in addition to the analysis of nanoparticles by SEM (scanning electron microscope) and AFM (atomic force microscope) images of soil samples. These tests are done for two methods with and without nanomaterials, and then the results are compared. According to the results, nano-silica increases the Plastic Limit (PL) slightly and Liquid Limit (LL) considerably; hence, the addition of nano-silica will increase the Plasticity Index (PI) of soil. Following the increase in nano-silica, the soil compressive strength is also increased; the more the curing time increases, the more the compressive strength will be enhanced. The average rate of increase in compressive strength with time will be increased by increasing the percentage of nano-silica. Based on the results of field and laboratory tests for the injection of nanomaterials and according to silica cementation between soil particles, the nano-silica injection has resulted in the increased CPT strength of soil; hence it is offered as a suitable solution.

Keywords

Nano-silica

injection

SEM and AFM analyses

strength parameters

[1] B.R. Bickmore, K.L. Nagy, P.E. Sandlin, and T.S. Crater, Quantifying surface areas of clays by atomic force microscopy, Amer. Mineral. 87 (2002), 780–783.

[2] C. Butr´on, M. Axelsson, and G. Gustafson, Silica sol for rock grouting: Laboratory testing of strength, fracture behavior and hydraulic conductivity, Tunnel. Underground Space Technol. 24 (2009), no. 6, 603–607.

[3] A. Dowling, Nano-science and nanotechnologies, Int. Symp. Nature, Purposes, Ethics and Politics of Evidence in a Democracy, Vol. 61, 2006.

[4] G.W. Gee and J.W. Bauder, Particle Size Analysis, Methods of Soil Analysis: Part I, 2nd ed., American Society of Agronomy (Agronomy9), Madison, 1986.

[5] R.K. Iler, The Chemistry of Silica: Solubility, Polymerization, Colloid, and Surface Properties, and Biochemistry, Wiley, New York, 1979.

[6] Sh. Jafarinejad, Basic Elements in Nanotechnology and Polymer Nanocomposites, Simaye Danesh, 2009. [In Persian]

[7] M.C. Jodin, F. Gaboriaud, and B. Humbert, Repercussions of size heterogeneity on the measurement of specific surface areas of colloidal minerals: combination of macroscopic and microscopic analyses, Amer. Mineral. 89 (2004), 1456–1463.

[8] P.A. Johnsson, C.M. Eggleston, and M.F. Hocella, Imaging molecularscale structure and microtopography of hematite with the atomic force microscope, Amer. Mineral. 76 (1991), 1442–1445.

[9] K. Namjesnik-Dejanovic and P.A. Maurice, Atomic force microscopy of soil stream fulvic acid, Colloids Surfaces A: Physicochem. Engin. Asp. 120 (1997), 77–86.

[10] M.R. Noll and C. Bartlett, Dochat TM in situ permeability reduction and chemical fixation using colloidal silica, Nat. Outdoor Action Conf., Las Vegas, NV, 1992, pp. 443–57.

[11] M. Sayed Hassan, F. Villieras, F. Gaboriaud, and A. Razafitianamaharavo, AFM and low-pressure argon adsorption analysis of geometrical properties of phyllosilicates, J. Coll. Interf. Sci. 296 (2006), no. 2, 614–623.

[12] K. Stout, J. Sullivan, W. P. Dong, E. Mainsah, N. Luo, T. Mathia, and H. Zahouani, The development of methods for the characterization of roughness on three dimensions, Publication no. EUR 15178 EN of the Commission of the European Communities, Luxembourg, 1994.

[13] J.M. Whang, Section 9: Chemical-based barrier materials, Assessment of barrier containment technologies for environmental remediation applications, R. R. Rumer and J. K. Mitchell, eds., NTIS, Springfield, 1995, pp. 211–247.

[14] R. Yonekura and M. Miwa, Fundamental Properties of Sodium Silicate Based Grout, Geotech. Conf., Singapore, 1993, pp. 439–444.

[15] G. Zhang, Advances in Measurement and Modeling of Soil Behavior, ASCE, 2007.

[16] G. Zhang, J.T. Germaine, A.J. Whittle, and C.C. Ladd, Index properties of a highly weathered old alluvium, Geotechnique 54 (2004b), no. 7, 441–451.