Investigation of Mechanical properties of Concrete composed of Bagasse Ash and Lime subjected to Ammonium Nitrate Attack

Abstract

The study addresses the challenge of concrete deterioration at the Fatima Fertilizers Corporation Limited (FFCL) Sadiqabad facility, caused by exposure to ammonium nitrate. It explores the use of lime and bagasse ash as partial replacements for cement to improve concrete's resistance to this chemical. The research focuses on identifying the optimal replacement percentage for maximizing strength and durability, particularly for M15 grade concrete. Experimental results show that a 20% replacement ratio of lime and bagasse ash offers the highest resistance to ammonium nitrate, with only a 15.11% decrease in compressive strength, compared to a 33.04% reduction with no replacement. Similarly, the 20% replacement ratio achieves the lowest reduction in tensile strength at 15.91%, compared to a 40.21% loss with no replacement. Additionally, the 15% replacement ratio enhances strength during water curing, showing significant increases in compressive and flexural strength. Overall, both lime and bagasse ash are effective in improving concrete durability, with the 20% replacement offering the best performance under ammonium nitrate.