DURABLITIY STUDY OF CONCRETE USING NANOSILICA AND RICE HUSK ASH

Authors

Aparna B. P, Vikram M. K Lecturer, Department of Civil Engineering, Government Polytechnic, Immadihalli, Bengaluru, Karnataka, India.
Khalander P.S Lecturer, Department of Civil Engineering, Government Polytechnic, Mundgod, Dst: Karwar, Karnataka, India.

The durability of concrete structures plays a significant role in modern construction,

especially in aggressive environments. This work discus ses the impact of nano-silica

(NS) and rice husk ash (RHA) substitution as a partial cement replacement in concrete

in order to improve the durability of concrete. This paper discusses the supplementary

cementitious materials (SCMs) together with their synergy concerning mechanical

properties, sulfate resistance, chloride ion penetration, water absorption, and

carbonation depth. Experimental studies were conducted based on the ASTM

standards for consistency and reliability. Incorporation of NS and RHA improves the

pozzolanic reaction, resulting in a finer microstructure and reduced permeability, thus

improving the durability of concrete. Significant improvements in the strength and

durability characteristics have been seen compared with the conventional concrete.

This work sheds light on sustainable construction by utilizing industrial by-products

and helps in the reduction of cement consumption, hence, lowering environmental

impacts. The result reveals that the durability of NS and RHA could enhance concrete

service life for the structure.