نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه مهندسی عمران-مکانیک خاک و پی، دانشگاه بین المللی امام خمینی (ره)، قزوین
2 گروه مهندسی عمران-مکانیک خاک و پی، دانشگاه بین المللی امام خمینی (ره)، قزوین، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Due to extensive construction activities in urban areas, the generation of construction waste has been increasing significantly. Among these wastes, recycled concrete grains (RCA) are notable, as they can serve as alternative natural materials in various road construction projects. Utilizing such materials in road construction projects can mitigate the environmental hazards associated with their disposal. This study investigates the clay from the Kazem Abad region of Qazvin, Iran, which exhibits low plasticity characteristics. The RCA materials used in this research were obtained from laboratory concrete samples. A series of laboratory tests, including compaction tests and uniaxial compressive strength (UCS) tests, were conducted on stabilized clay samples incorporating 25 and 50% RCA, and the effect of curing durations of 7, 14 and 28 days on UCS was investigated. Also, the effect of melting and freezing cycles on the uniaxial compressive strength of stabilized clay was investigated. The results indicated that incorporating RCA into clay soil reduces the maximum dry density (MDD) and the optimum moisture content (OMC). Moreover, due to the higher proportion of unhydrated cement particles in the 50% RCA mixture compared to the 25% RCA mixture, the UCS values exhibited greater growth over time. Additionally, UCS values for all RCA percentages declined as the number of freeze-thaw cycles increased, with the most significant strength reduction occurring in the initial cycles. Overall, the findings suggest that incorporating RCA can enhance the geotechnical properties of clay subgrade layers, making them a viable option for sustainable road construction.
کلیدواژه‌ها [English]
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