Properties of Bottom Ash-Based Compositeby N. Ghafoori, Southern Illinois Univ, Carbondale, United States,
J. Bucholc, Southern Illinois Univ, Carbondale, United States,
Abstract: High-calcium bottom ash, a by-product of the electric power industry, was evaluated for feasibility of use as a fine aggregate in structural grade concrete. Both fresh and hardened properties were evaluated. It was found that bottom ash of high calcium content exhibits higher water requirement, as compared to that of control mixes, to produce a given consistency. As a result, both fresh and hardened properties are adversely impacted, particularly for the mixes of low cement content. When a water-reducing admixture is used, the engineering properties of bottom ash concretes are similar and in most cases superior, to those of control mixes.
Subject Headings: Bottom ash | Electric power | Calcium | Composite materials | Coal | Construction materials | Recycling | Industrial facilities
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