STUDY OF CORROSION OF REINFORCED STEEL BARS IN RECYCLED AGGREGATE CONCRETE WITH FLY ASH

C Ravi Kumar Reddy, CH Hema Sindhusha, G Hymavathi, N Ramyasri

Abstract: Large number of old buildings and other structures have reached the end of their service life and are being demolished, resulting in generation of demolished concrete. Some of this concrete wastes are used as backfill material and much being sent to landfills. Recycling concrete by using it as replacement to new aggregate in concrete could reduce concrete waste and conserve natural source of aggregate. Recycled aggregate reduce cost savings. Use of recycled aggregate in concrete can be useful for reducing dumping problems and scarcity of virgin aggregates. In present study, in addition to the recycled aggregate, fly ash has been used to study the durability properties of recycled aggregate concrete. Properties of Recycled Aggregate Concrete were compared with Conventional Concrete with varying fly ash content. While the corrosion protection of the reinforcing steel in no substitute for design and the placement of good quality concrete, it does provide for a viable and economical extension of structural integrity and service life in the day to day and practical environment in which concrete structures are constructed. The process of corrosion, its forms of attack and consequent deterioration of reinforcement concrete structures is well understood and documented. This paper explores the economic and practical benefits offered by the application of recycled aggregate concrete and advantages of recycled aggregate concrete with and without admixtures.

Keywords: Recycled aggregate, Fly ash, Concrete, and corrosion in steel

DOI: https://doi.org/10.15623/ijret.2014.0311032