عنوان	Optimization of The Cold In-Place Recycling Mix Design by Nonlinear Simplex Method
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Mix Design Procedure,Cold Recycling,Mathematical Modelling,Least Square Method
چکیده	Mix design is the main stage in the cold recycling procedure. Human plays an important role in all mix design procedures such as task 38 AASHTO method. This factor leads to imposing the high cost and the low quality in the mixture production. In this study, a mathematical model was developed to determine the percentage of optimum bitumen emulsion in the Cold In-Place Recycling Mix Design. The mix design results of task 38 AASHTO were considered as model inputs. Firstly, the equations of effective parameters with respect to the recycled material’s mix design were determined by the least square method and then percentage of optimum bitumen emulsion was determined by the SIMPLEX method. To validate the model, six cold recycling mix designs from the QoochanChenaran road in the province of Khorasan Razavi, Iran, were studied and results were examined by considering bitumen emulsion as an additive material. It was found that an excessive percentage of bitumen emulsion consumption, not only leads to the increasing expenses but also affects the recycled materials’ quality.
پژوهشگران	محمود عامری (نفر اول)، حامد خانی سن ایچ (نفر دوم)، سعید طولابی (نفر سوم)، سید حسین حسینی (نفر چهارم)