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Eshghi, Payam, Jafary Shalkoohy, Ata, Ghaderi Niri, Hamidreza, Pourdada, Azin, Kheyri, Fereshteh. (1404). Utilization of Recycled Carpet Waste in Clay Soil Mixtures: Mechanical Properties and Environmental Benefits. پژوهشنامه مدیریت اجرایی, 2(2), 23-31. doi: 10.22080/cste.2025.28966.1029
Payam Eshghi; Ata Jafary Shalkoohy; Hamidreza Ghaderi Niri; Azin Pourdada; Fereshteh Kheyri. "Utilization of Recycled Carpet Waste in Clay Soil Mixtures: Mechanical Properties and Environmental Benefits". پژوهشنامه مدیریت اجرایی, 2, 2, 1404, 23-31. doi: 10.22080/cste.2025.28966.1029
Eshghi, Payam, Jafary Shalkoohy, Ata, Ghaderi Niri, Hamidreza, Pourdada, Azin, Kheyri, Fereshteh. (1404). 'Utilization of Recycled Carpet Waste in Clay Soil Mixtures: Mechanical Properties and Environmental Benefits', پژوهشنامه مدیریت اجرایی, 2(2), pp. 23-31. doi: 10.22080/cste.2025.28966.1029
Eshghi, Payam, Jafary Shalkoohy, Ata, Ghaderi Niri, Hamidreza, Pourdada, Azin, Kheyri, Fereshteh. Utilization of Recycled Carpet Waste in Clay Soil Mixtures: Mechanical Properties and Environmental Benefits. پژوهشنامه مدیریت اجرایی, 1404; 2(2): 23-31. doi: 10.22080/cste.2025.28966.1029

Utilization of Recycled Carpet Waste in Clay Soil Mixtures: Mechanical Properties and Environmental Benefits

Contributions of Science and Technology for Engineering
مقاله 4، دوره 2، شماره 2، مرداد 2025، صفحه 23-31    اصل مقاله (481.94 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22080/cste.2025.28966.1029
نویسندگان
Payam Eshghi1؛ Ata Jafary Shalkoohy* 2؛ Hamidreza Ghaderi Niri1؛ Azin Pourdada2؛ Fereshteh Kheyri2
1Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
2Department of Civil Engineering, Bandar Anzali Branch, Islamic Azad University, Bandar Anzali, Iran
تاریخ دریافت: 20 فروردین 1404،  تاریخ بازنگری: 01 اردیبهشت 1404،  تاریخ پذیرش: 03 اردیبهشت 1404 
چکیده
In line with sustainable strategies for soil improvement, this study investigated the mechanical behavior of clay soil reinforced with various percentages of recycled carpet waste (RCW) through compaction, unconfined compressive strength (UCS), and direct shear tests (DST). The results indicated that with increasing RCW content, the maximum dry unit weight (MDUW) decreased, while the optimum moisture content (OMC) increased, primarily due to the lower specific gravity and greater water absorption capacity of the carpet fibers. The UCS and secant modulus at 50% of peak stress (E50) increased up to 1% RCW, reaching 216.7 kPa and 3342 kPa, respectively. However, beyond this content, both strength and stiffness declined, likely due to weakened internal bonding and increased void ratio in the soil-fiber mixture. In terms of shear strength parameters, both cohesion and the internal friction angle improved up to 1% RCW (70.2 kPa and 18.7°, respectively), followed by a decrease at higher dosages. These changes are attributed to the improved interlocking and bonding between soil particles and the distributed fibers at lower contents. Overall, incorporating RCW up to approximately 1% offers a practical and environmentally responsible approach for enhancing the engineering properties of clay soils.
کلیدواژه‌ها
RCW؛ Clay؛ Mechanical properties؛ Environmental Impact؛ Sustainable Construction Materials
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