A field demonstration project utilizing FBC/PCC residues for paving materials. Technical report, March 1--May 31, 1995

In the past two years, southern Illinois University at Carbondale (SIUC), under the sponsorship of Illinois Clean coal Institute, has performed a series of laboratory research into engineering properties of roller compacted concretes containing fluidized bed combustion/pulverized coal combustion (FBS/PCC) by-products as well as FBC/PCC-Portland cement concrete mixtures prepared under conventional placement technique. This laboratory effort has resulted in identification of a number of potentially viable commercial applications for the FBC by-products residues derived from Illinois high-sulfur coal. One potential and promising application of the FBC/PCC solid waste residues, which also accounts for the large utilization of coal-based by-product materials, is in pavement construction. A total of twenty-three different pavement slabs will be constructed at an identified site located in the Illinois Coal Development Park, Carterville, Illinois, by two construction contractors who are part of the industrial participants of the initial project. Both conventional and roller compacted concrete placement techniques will be utilized. All sections will be subjected to an extensive engineering evaluation and will be monitored for nearly a year for both short- and long-term performance. The field results will be compared to that of the equivalent laboratory- prepared mixes in order to ascertain the suitability of the proposed mixes for field applications. During this reporting period, the long- term durability of the field and laboratory vibratory-placed FBC/PCC surface and base concrete slabs were evaluated