Fly ash from Arkansas Power and Light Company's Coal Fired Generating Plants at White Bluff (near Redfield) and Independence (near Newport) was used in conjunction with hydrated lime and water for a slurry pressure injection-slope stabilization on Bolling Road overpass near West Memphis.
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In 1982 the Iowa DOT allowed a successful bidder the option of submitting materials and proportions using fly ash to produce a portland cement concrete (PCC) paving mixture to meet a specified compressive strength. The contractor, Irving F. Jensen, received approval for the use of a concrete mixture utilizing 500 lbs. of portland cement and 88 lbs. of fly ash as a replacement of 88 lbs. of portland cement. The PCC mixture was utilized on the Muscatine County US 61 relocation bypass paved as project F-61-4(32)--20-70. A Class "C" fly ash obtained from the Chillicothe electric generating plant approximately 100 miles away was used in the project. This use of fly ash in lieu of portland cement resulted in a cost savings of $64,500 and an energy savings of approximately 16 billion BTU. The compressive strength of this PCC mixture option was very comparable to concrete mixtures produced without the use of fly ash. The pavement has been performing very well. The substitution of fly ash for 15% of the cement has been allowed as a contractor's option since 1984. Due to the cost savings, it has been used in almost all Iowa PCC paving since that time.
"Fly ash from Arkansas Power and Light's Coal Fired Generating Plant at White Bluff (near Redfield) was utilized as the base course for the 38th Street Connection Road in Pine Bluff. A mixture of 100% fly ash and water was mixed, laid down, and compacted in two lifts to form an 8 inch Fly Ash Base Course. This demonstration project illustrates the design and construction procedures and the resultant energy conservation of utilizing a by-product of the coal fired generating plant"--Technical report documentation page.