Use of Metakaoline in Concrete
Author : Kunal Satish Jadhav, Shyam Satish Jadhav, Siddesh Popat Belkar, Omkar Gurunath Desale and Dr. Dipali Prakash Patole
Abstract :
This study investigates metakaolin's potential as a sustainable and environmentally friendly ingredient for ultra-high performance concrete (UHPC). The study aims to fill existing knowledge gaps by examining the physical and chemical characteristics of metakaolin and how it affects UHPC's mechanical qualities, such as compressive and flexural strength. Furthermore, the durability of UHPC with metakaolin is evaluated, with special focus on its ability to withstand prolonged stress and its resistance to environmental impacts. This review seeks to further understanding of metakaolin's role in UHPC and suggests areas for further study in order to optimize its use in sustainable construction. The manufacture of UHPC has a wellknown negative environmental impact, which emphasizes the need for more affordable and environmentally friendly alternatives. Metakaolin, which is rich in SiO2 and Al2O3, is produced when kaolin is calcined, and it enhances the properties of concrete. Microstructure studies indicate that thick calcium silicate hydrate (C-S-H) is produced by mixes with smaller particle sizes and lower water-to-binder ratios (0.16-0.24), and ettringite and alkali-silica reactions are less common. The ideal metakaolin level for boosting compressive strength is between 5% and 15% of the cementitious materials, whereas flexural strength typically improves between 5% and 10%. Proper curing is essential for UHPC containing metakaolin to reach its maximum efficacy. This study supports the usage of metakaolin as a green addition to improve the durability of UHPC and promote more ecologically friendly building practices.
Keywords :
Natural denitrification, IEMB-Ion trade layer bioreactor, MBR-Membrane bioreactor, ED-Electro dialysis.
