نوع مقاله : پژوهشی
دانشکدۀ مهندسی عمران دانشگاه تربیت دبیر شهید رجائی
عنوان مقاله [English]
The purpose of this study is to determine the appropriate percentage of RAP and cement in the stabilized base in such a way that the durability and economics of the pavement are considered simultaneously. Therefore, compressive and tensile strength was obtained in different percentages of RAP including 0%, 40%, 60%, and 80%, and indifferent percentages of cement including 3%, 5%, and 7%. The structural design of the Pavement was further determined under 10, 20, 35, and 50 million ESALs. By establishing the relationship between the percentages of RAP, percentage of cement, and moisture sensitivity index (TSR) as an effective parameter in durability, and the cost of paving at different loads, a simultaneous cost-durability equation of pavement was formed. Finally, based on the optimization technique, the optimal percentage of RAP and cement to achieve the expected durability (TSR = 70) was determined. Hence, the optimum cost, which is a function of the loading level, was obtained in the amount of 29.6% of RAP, 4.16% of cement, and in the minimum loading level. The results can be appropriately approximated in the design of durable and economical pavement structures Contains a stabilized base with cement and various amounts of RAP.
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