Master of Science
John T. Fox
Concrete utilizes mined sand aggregate. Alternatives to mined aggregates are limited. Bottom ash fines from waste-to-energy (WtE) facilities possess both a particle size and chemical composition, similar to mined sand. Concrete and mortar was batched that contained from 0-100% reclaimed WtE fines. The concrete and mortar was assessed for compressive strength, split strength, slump, and unit weight. The results suggest that reclaimed WtE fines provide adequate strength and slump at 20-60% replacement. Above 60% replacement reclaimed WtE fines required additional cementitious materials to maintain strength. Reclaimed WtE fines are suitable replacements to mined silica sand, but require further work to assess serviceability. Reclaimed WtE fines may be particularly well suited for niche applications where their properties are favorable to the specific use.
Chen, Shaoliang, "The Performance of Concrete and Mortars Produced with Fine Aggregates Recovered from WtE Processes" (2020). Theses and Dissertations. 5642.
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