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SCIENCE & INNOVATION26 SCIENCE & INNOVATION AAC WORLDWIDE %u2022 2.2026ConclusionsThe integration of NFC into the AAC system was successfully achieved. With the observed improvement in mechanical performance, the brittle behavior of the AAC samples was reduced, demonstrating environmentally friendly and effective approach to limiting cracks that may occur during transportation and/or service. The main findings are as follows:%u2022 Increase in the NFC dosage raises the water-retention capacity through the hydroxyl groups in its structure, thereby increasing the viscosity of the casting slurry and consequently reducing the spread diameter. Considering workability and stability criteria together in terms of the production process, NFC dosage of 0.3% was identified as the optimum reinforcement level.%u2022 For the AAC cube containing 0.3% NFC, dry bulk density was measured as 341 kg/m3 with a compressive strength of 1.68 MPa and a flexural strength of 0.376 MPa. Compared with the control sample, these results indicate increases of 13.5% in compressive strength and 23.55% in flexural strength.%u2022 Following autoclave curing, XRD results indicated that the main hydration products were tobermorite and C-S-H. For the sample containing 0.3% NFC, a decrease in quartz peak intensities and increase in tobermorite peaks were observed which can be associated with the improvement in compressive strength. The reduction in quartz peak suggests that greater amount of silica participated in the hydrothermal reaction. SEM observations further revealed that hydration products accumulated intensively around the NFC surface, resulting in more compact microstructure.In conclusion using NFC, renewable resource, as reinforcing material offers a feasible approach to producing AAC products with improved mechanical performance while maintaining environmentally friendly characteristics. %u25cfReferences[1] Lapovska Svitlana, Chernenko Nicholas, Konoplya Mykola, The effect of cellulose fiber on the bending strength of autoclaved aerated concrete, Annals of civil and environmental engineering, 8, 45-47, 2024. https://doi.org/10.29328/journal.acee.1001065[2] I. Alejandra Corro-Escoria, Juan Hernandez-Avila, Eduardo Cerecedo-Saenz, F.R. Barrientos-Hernandez, Montserrat Cruz-Hernandez, Norman Toro, Edelmira Galvez, M.P. 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