Effect of Nano Cement Particles on Geotechnical Properties of Dune Sand-Bentonite Mixtures

Document Type : Original Article

Authors

• Reza Parvaresh ¹
• Rouzbeh Dabiri ²
• Saeideh Ebrahimi Asl ³

¹ Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.

² Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

³ Department of Chemistry Engineering, Ahar Branch, Islamic Azad University, Ahar, Iran

10.22067/jfcei.2024.82076.1225

Abstract

Improving the engineering behavior of problematic soils in civil engineering projects is considered as one of the most important issues in geotechnical engineering. The important and decisive factor in the design of geotechnical structures and buildings on soft and loose soils is their deformation or settlement and resistance. One of the types of soft soil is a mixture of dune sand with clay (Bentonite). Although soil stabilization are generally divided to mechanical and chemical methods, nowadays Nano materials are used to improve the geotechnical properties of soils. The main idea of present research is the possibility of using Nano cement particles to improve the geotechnical properties of dune sand-bentonite (at the 15, 30 and 60 percentage) mixture. In order to perform the research, uniaxial compression, direct shear (in both dry and saturated states) and California load bearing ratio (CBR) laboratory tests have been used based on the ASTM standard. The obtained results have shown that the optimal condition is the combination of 0.6 % Nano cement in dune sand with 15% bentonite with 28-day curing period. Because, these conditions have improved compressibility characteristics, increased bearing capacity and shear resistance in stabilized materials.

Keywords

• Dune sand
• Clay
• Bentonite
• Nano cement
• Soil Improvement

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