Study of Durability Characteristics of SCC made from Recycled Fine Aggregates

Abstract

A self-compacting concrete (SCC) is the one that can be placed in the form and can go through obstructions by its own weight and without the need of vibration. Since its first development in Japan in 1988, SCC has gained wider acceptance in Japan, Europe and USA due to its inherent distinct advantages. SCC provides better quality especially in the members having reinforcement congestion or decreasing the permeability and improving durability of concrete”.

The primary aim of this study is to explore the acceptability of demolished concrete waste aggregate to make self compacting concrete of high strength and desirable properties. It addresses experiments on various mixes of self compacting concrete – one with fresh coarse and fine aggregates, while the others with replacement of 25%, 50 %, 75% and 100% recycled fine aggregates.

Results showed the fresh, hardened and durability properties of all the concrete mixes were comparable. The compressive strength of all the concrete mixes were measured at the age of 7 and 28 days, and testing them for, water absorption, sulfate resistance sorptivity and chloride penetration resistance. The significance of this work lies in its attempt to provide Durability performance of SCC made with recycled concrete so as to draw attention to the possible use of SCC made with recycled fine aggregate(RFA).