Abstract
Soil stabilization with cement is one of the most widely used methods in construction projects. Nowadays, the use of new and environmentally friendly materials, such as nanoparticles, has attracted the attention of geotechnical engineers. Hence, in the present study, cement and nanoclay (NC) were added to silty sand to improve the soil properties through various tests, including standard Proctor compaction, unconfined compressive strength (UCS), and unconsolidated-undrained (UU) triaxial tests. Evaluations were performed for different percentages of cement (4, 6, and 8% by dry weight of the mixed soil) and NC (0, 0.5, 1, and 2% by dry weight of the cement, as an additive and replacement materials). Curing time for UCS tests was 7, 14, and 28 days, and for UU triaxial test was 14 days. The results of the standard Proctor compaction tests showed that with increase in the cement percentage, the maximum dry unit weight increased, and the optimum moisture content (OMC) decreased. Results of the UCS tests indicated that by increasing the cement percentage, the UCS enhanced, and the samples exhibited brittle behavior. Moreover, the NC had no significant effect on the UCS as well as the brittle behavior of the cement-stabilized samples. The results of the UU triaxial tests showed that not only the cohesion (C) but also the internal friction angle (φ) improved with increase in the cement percentage, in which the increase in the C was more significant in comparison with the φ.
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The authors acknowledge the funding support of Babol Noshirvani University of Technology through Grant program No. BNUT/370342/98.
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Momeni Helali, V., Noorzad, R. Effects of Cement and Nanoclay on the Characteristics of the Sand with Non-Plastic Fine Materials. Iran J Sci Technol Trans Civ Eng 46, 4265–4280 (2022). https://doi.org/10.1007/s40996-022-00875-0
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DOI: https://doi.org/10.1007/s40996-022-00875-0