JSTE_V2_N1_A1 Harvinder Singh Journal on Structural Engineering 2320 - 2343 2 1 1 5 Mechanics; Limit Analysis; Slope; Reinforcement; Flyash; Soil Flyash-a waste by product-is proving a versatile material for the geotechnical use despite its low shearing strength. Past research has demonstrated its potential use in construction of embankments/slopes, filling of low land area etc. It is, now, a well documented fact that use of reinforcing element(s) in flyash slopes and other applications proves beneficial in enhancing its load carrying capacity. In this article, it has been tried to present the mechanics behind this phenomenon and a set of forces working, silently, inside the reinforced flyash/soil mass/slopes that become responsible for strength enhancement of the system. It will help readers to visualise reinforced-flyash system in term of forces and develop simplified analytical expressions governing the behaviour of reinforced slopes. March - May 2013 Copyright © 2013 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=2263