Amirkabir University of Technology Amirkabir Journal of Civil Engineering 2588-297X 55 11 2024 01 21 Durability of geopolymer mortars with suggested percentages of slag and kaolin containing polymer Durability of geopolymer mortars with suggested percentages of slag and kaolin containing polymer 2243 2262 5301 10.22060/ceej.2023.21710.7803 FA Seyed Hosein Ghasemzadeh Mosavinejad Faculty of Engineering, University of Guilan, Rasht, Iran 0000-0002-8023-7694 Arian Darvishalinezhad Faculty of Engineering, University of Guilan, Rasht, Iran 0000-0002-6215-7789 Journal Article 2022 08 21 Geopolymers as cement-free concrete have attracted the attention of researchers in recent years. In making this type of concrete, instead of cement, various materials such as micro silica, metakaolin, zeolite, etc., and chemical solutions are used to complete the geopolymerization process to form the binding adhesive substance. The present study examines the durability of geopolymeric mortars based on blast furnace slag (GGBFS) with different replacement percentages of kaolin in several molar amounts. The GGBFS was used as a substitute for cement, and sodium hydroxide solution with a concentration of 4 and 8 M and sodium silicate (glass water) were used as chemical solutions. For this purpose, kaolin ceramic powder was mixed with GGBFS at 50% and 75%, and a total of 12 mixing plans were made. Compressive strength, rapid chloride migration test (RCMT), electrical resistance, water absorption percentage, loss of compressive strength, and weight after exposure to sulfuric acid solution were studied. The results of kaolin powder and slag reduced the compressive strength, and the lowest value of 33% was observed in BSC50-4; Also, the results of the penetration of chlorine ions in concrete and the weight loss of mortar samples in sulfuric acid solution indicate that the use of kaolin powder and slag increases the durability of BSC50-8 concrete samples by 38% under the conditions of chloride attack caused by Permeability decreases. Geopolymers as cement-free concrete have attracted the attention of researchers in recent years. In making this type of concrete, instead of cement, various materials such as micro silica, metakaolin, zeolite, etc., and chemical solutions are used to complete the geopolymerization process to form the binding adhesive substance. The present study examines the durability of geopolymeric mortars based on blast furnace slag (GGBFS) with different replacement percentages of kaolin in several molar amounts. The GGBFS was used as a substitute for cement, and sodium hydroxide solution with a concentration of 4 and 8 M and sodium silicate (glass water) were used as chemical solutions. For this purpose, kaolin ceramic powder was mixed with GGBFS at 50% and 75%, and a total of 12 mixing plans were made. Compressive strength, rapid chloride migration test (RCMT), electrical resistance, water absorption percentage, loss of compressive strength, and weight after exposure to sulfuric acid solution were studied. The results of kaolin powder and slag reduced the compressive strength, and the lowest value of 33% was observed in BSC50-4; Also, the results of the penetration of chlorine ions in concrete and the weight loss of mortar samples in sulfuric acid solution indicate that the use of kaolin powder and slag increases the durability of BSC50-8 concrete samples by 38% under the conditions of chloride attack caused by Permeability decreases. https://ceej.aut.ac.ir/article_5301_b27d5296bede63b1493a5d321d4e8092.pdf