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Valizadeh Kiamahalleh, Mohammad, Khorshidi-Mianaei, Aref, Safari, Amin. (1404). Improvement of Recycled Concrete Aggregate Properties by Polyvinyl Alcohol. پژوهشنامه مدیریت اجرایی, (), -. doi: 10.22080/ceas.2025.30167.1046
Mohammad Valizadeh Kiamahalleh; Aref Khorshidi-Mianaei; Amin Safari. "Improvement of Recycled Concrete Aggregate Properties by Polyvinyl Alcohol". پژوهشنامه مدیریت اجرایی, , , 1404, -. doi: 10.22080/ceas.2025.30167.1046
Valizadeh Kiamahalleh, Mohammad, Khorshidi-Mianaei, Aref, Safari, Amin. (1404). 'Improvement of Recycled Concrete Aggregate Properties by Polyvinyl Alcohol', پژوهشنامه مدیریت اجرایی, (), pp. -. doi: 10.22080/ceas.2025.30167.1046
Valizadeh Kiamahalleh, Mohammad, Khorshidi-Mianaei, Aref, Safari, Amin. Improvement of Recycled Concrete Aggregate Properties by Polyvinyl Alcohol. پژوهشنامه مدیریت اجرایی, 1404; (): -. doi: 10.22080/ceas.2025.30167.1046

Improvement of Recycled Concrete Aggregate Properties by Polyvinyl Alcohol

Civil Engineering and Applied Solutions
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 05 آذر 1404
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22080/ceas.2025.30167.1046
نویسندگان
Mohammad Valizadeh Kiamahalleh* 1؛ Aref Khorshidi-Mianaei2؛ Amin Safari3
1College of Science and Engineering, Flinders University, SA, Australia
2Ghaem Technology Institute of Higher Education, Qaem Shahr, Mazandaran, Iran
3Quattro, Varsity Lakes, QLD 4227, Australia
تاریخ دریافت: 07 مهر 1404،  تاریخ بازنگری: 21 آبان 1404،  تاریخ پذیرش: 02 آذر 1404 
چکیده
This study examines liquid polyvinyl alcohol (PVA) impregnation of recycled concrete aggregate (RCA) to refine pore structure and evaluate its influence on the fresh and hardened properties of companion concretes, using natural aggregate concrete as the benchmark. Aggregates were pretreated at progressively higher PVA dosages and characterized for specific gravity, water absorption, and gradation, and concretes with untreated and PVA-treated RCA were assessed for slump, water absorption, compressive strength, and drying shrinkage. The investigation was intentionally designed for non-structural concrete applications such as paving blocks, curbs, and lightweight elements, where durability and sustainability are prioritized over high strength. Results indicated that increasing PVA dosage enhanced aggregate density and reduced water absorption at higher levels (10%), but also caused trade-offs in workability and mechanical strength. Workability improved at 6% PVA but declined at higher contents, while compressive strength decreased at 6–8% and partially recovered at 10%. Drying shrinkage increased slightly with PVA addition. Overall, PVA pretreatment improved aggregate densification and moisture resistance but required dosage optimization for practical use in durable, non-structural RCA concretes aimed at sustainable resource utilization.
کلیدواژه‌ها
Recycled concrete aggregate (RCA)؛ Polyvinyl alcohol (PVA)؛ Natural aggregate (NA)؛ Concrete
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