Investigating The Microstructure of Geopolymer Concrete in Structures, With a Crisis Management Approach

Crisis management is one of the indicators of creating national security in the country. In order to reduce the vulnerability of vital centers and civil infrastructures of the country against the occurrence of various crises, improving the mechanical properties and durability of concrete used in reinforced concrete structures of such centers will be an effective and practical solution. Was. In this laboratory research, a mixed design of ordinary concrete containing Portland cement with a grade of 500 kg/m3 and a mixed design of geopolymer concrete based on slag of the slag furnace were made. In order to investigate the microstructure of concrete, scanning electron microscope (SEM) images were analyzed on concrete samples at the age of 90 days, then in order to verify the SEM results, non-destructive water permeability test and destructive test were performed. The compressive strength was performed in concrete at the age of 7, 28 and 90 days. The results of SEM analysis indicate the superiority of compaction in the microstructure of geopolymer concrete due to the production of a high volume of hydrated gels compared to normal concrete. The results of the compressive strength and water permeability test show that a large part of the georechargement process has been completed at the age of 90 days in concrete. Normal concrete and geopolymer concrete were obtained in the compressive strength test by 48.79 and 10.93% respectively, in the permeability test, this superiority was obtained by 19.44 and 14.81% respectively.