نوع مقاله : علمی - پژوهشی
نویسنده
مربی، دانشکده مهندسی عمران، واحد نجفآباد، دانشگاه آزاد اسلامی، نجفآباد، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
Reactive powder concrete (RPC) is a type of concrete with extremely high strength. Concrete mix design is the process of determining the proportions and quantities of concrete components, so that the produced concrete is as affordable as possible and meets the required requirements. The purpose of this research is to evaluate and rank the design of RPC concrete mixing, which can have the desired quality, including compressive strength and durability. For this purpose, 13 RPC concrete mixing plans were evaluated with the numerical taxonomy technique and all values of the shortest distances (dr,min) of 13 mixing plans were between 3.709 and 0.761, which means that all mixing plans are homogeneous. options), so there is no need to remove any of the options. In the next step, with SAW and TOPSIS methods, the ranking of RPC concrete mixing plans was done and the ranks 1 to 3 were extracted. To ensure the accuracy of ranking results, Spearman's rank correlation coefficient (Rs) was calculated and a value of 0.997 was obtained, which is very close to one and indicates a strong correlation between SAW and TOPSIS variables. Also, the coefficient of determination (recognition coefficient) (Rs2), which allows us to determine how confident we can be in predicting the SAW and TOPSIS method, was obtained equal to 99.4%, in other words, the coefficient of determination is 99.4%. It shows that 99.4% can be sure of the ranking of the concrete mixing plan with SAW and TOPSIS method and the final ranking was presented by normalizing the differences of relative closeness index of SAW and TOPSIS method.
کلیدواژهها [English]
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