Application of Multi-Index Decision Making Methods to Ranking Reactive powder concrete mixing designs

Reactive powder concrete is a special type of concrete whose strength and durability have been improved by removing coarse-grained materials and the use of additives, and due to the variety of materials and methods of construction, the ratio of components or in other words Different mixing schemes have been proposed for the production of this type of concrete, and it will be difficult to decide on the best choice of reactive powder concrete mixing scheme. In this research, it is tried to use multi-criteria decision making techniques in order to rank and select the most appropriate mixed concrete powder mixing designs.Effective indicators in the concrete mixing plan include: cement, water, silica powder, silica sand, microsilica powder, superplasticizer, compressive strength, water absorption percentage and unit weight of volume, which are determined and evaluated using research background.First, the weight of the indices was determined by Shannon's entropy method, and the decision matrix was formed, then the reaction powder concrete mixing schemes were ranked separately with the three techniques of SAW, TOPSIS and VIKOR. Research shows that using different decision-making techniques can lead to different rankings for options. Therefore, in order to obtain the final ranking, the Copeland method has been proposed as the best method, and the use of multi-criteria decision-making techniques for ranking the mixed concrete mixing projects is a suitable and acceptable method.The final ranking of Copeland was compared with the techniques of SAW, TOPSIS, and VIKOR, and it was found that the results of ranking of SAW, TOPSIS, and VIKOR methods were 100, 85, and 70 percent consistent with the Kopland method, respectively. Also, the SAW method was considered the most suitable method for ranking reactive concrete mixing schemes due to its 100% compliance with the Copeland method.