بهسازي خاك‌هاي مناطق مختلف اصفهان با استفاده از مواد نانو و خاكستر لجن فاضلاب

Improvement of soils in different areas of Isfahan using nano materials an‎d sewage sludge ash

زمين شناسي

In most engineering projects, we encounter soils that are not suitable for constructing structures, including problematic soils that cause problems during engineering projects. Such soils need improvement to become suitable for implementing engineering projects. In this study, we intend to use the optimal percentage of nanomaterials, 2, 4, an‎d 6 percent of sewage sludge ash, an‎d the combination of the optimal percentage of nanomaterials an‎d sewage sludge ash to improve four types of soil that were obtained from different regions of Isfahan (S1, S2, S3, an‎d S4). Because this makes optimal use of a waste an‎d cheap material, an‎d by combining it with nanomaterials, an economical method can be used to improve the soil. After conducting laboratory experiments on soils an‎d then improved soils, we found that improving S2, S3 an‎d S4 soils with nanomaterials increased the unconfined compressive strength an‎d elastic modulus of the soil in both the immediate an‎d 24-hour conditions at ambient temperature, but in S1 soil it increased the unconfined compressive strength an‎d elastic modulus in the immediate condition an‎d decreased them in the 24-hour condition at ambient temperature. The optimal amount of sewage sludge ash in improving S1, S2 an‎d S3 soils is 2% in the immediate condition an‎d 6% in the 24-hour condition at ambient temperature, but this amount in S4 soil is 6% in the immediate condition an‎d 2% in the 24-hour condition at ambient temperature. Improvement by combining the optimal percentage of sewage sludge ash an‎d nanomaterials in S2, S3 an‎d S4 soils increased the unconfined compressive strength an‎d elastic modulus of the soil in both immediate an‎d 24-hour conditions at ambient temperature, but in S1 soil it only increased the unconfined compressive strength an‎d elastic modulus in the immediate condition. Improvement by combining the optimal percentage of sewage sludge ash an‎d nanomaterials had a greater effect on increasing the unconfined compressive strength of the samples in the immediate condition, an‎d improvement with 4, 2 an‎d 6% sewage sludge ash had a greater effect on increasing the unconfined compressive strength of the samples in the 24-hour condition at ambient temperature.

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