Evaluation and utilization of Illinois FBC residues for construction materials. Technical progress report, March 1, 1992--May 31, 1992

The overall objective of this program is to investigate the extent to which fluidized bed combustion (FBC) by-products can be properly utilized as viable construction materials. This investigation focuses primarily on the properties of residues derived from fluidized combustion burning of Illinois high-sulfur coal. The research plan calls for evaluation of physics-chemical and engineering characteristics of the FBC-based cement and non-cement mixes. The results of this study will be used to compare the physical and mechanical properties of the FBC-based mixtures with those of conventional mixes. The suitability of using FBC residues as a filler or binder aggregate for Portland cement-based mixtures and Non-Portland cement mixes in the form of conventional and roller compacted materials will be evaluated. During this reporting period, physics-chemical properties of class F fly ash, supplied by the American Fly Ash Company of Naperville, Illinois, were completed. Work on all major tasks, sulfate durability of FBC cement-based mixtures and Engineering characteristics of roller compacted non-cement FBC mixes (task II), are on-going.