Effect of binders coating to improve the impermeability of Concrete

Abstract

This research explores the application of sawdust ash, sugarcane bagasse ash, and paper sludge ash as binder
coatings to improve the impermeability of concrete surfaces. Concrete permeability is a crucial factor affecting the
lifespan and integrity of concrete structures. It essentially refers to how easily liquids and gases can pass through the concrete. Concrete water permeability is vital for durability, as it determines water ingress resistance, impacting longterm structural integrity. Most deterioration actions affecting the durability of concrete structures are related to the penetration of aggressive agents from the environment into the concrete (Robert J. Torent, et al, 2021). Highly permeable concrete allows water to seep in. This water can cause corrosion of the steel reinforcement within the concrete, leading to cracks and weakening the structure. These ashes were applied separately and in combination on 6" x 6" x 6" concrete cubes. The best ash mixture is 10% replacement combined with 30% replacement of cement by paper sludge ash and sugarcane bagasse ash respectively, increased impermeability about 72% when compared to uncoated and individually ash-coated surfaces, according to the results. This study emphasizes the possibility of recycling waste materials from agriculture and industry as environmentally friendly coatings to increase the durability of concrete and support sustainable building methods.