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- W596500519 abstract "An opportunity to demonstrate the use of mixtures containing waste calcium sulfate was presented by the Transpo '72 International Transportation Exposition held at Dulles Airport near Washington, D.C., during the week beginning May 27, 1972. The Federal Highway Administration (FHWA) became responsible for much of the paving required at the exposition site, including about 100 acres of parking area. The parking area was only required to be serviceable for the week of the exposition so it was not contemplated that a high-type, all-weather surface be provided. The plan adopted was to pave the entire parking area with 5 inches of a compacted mixture of sulfate, lime, fly ash and aggregate on a properly compacted subgrade. About 75,000 tons of this mixture was placed at the rate of 1,000 tons per acre. The areas to be used for passenger car parking were given a bituminous seal, primarily to retain moisture for curing, but this seal also served as the final riding surface. Traffic lanes within the parking lot and areas destined for bus parking were surfaced with 2 inches of conventional bituminous concrete, except that a number of roadway sections about 235 feet in length were used to demonstrate the use of other waste products as well as synthetic aggregate prepared from a sulfate-lime-fly ash mixture. For example, the sulfate-containing aggregate was used in portland cement concrete pavement and as a base course. The production of the field mixtures and the synthetic aggregate were subcontracted to the G. & W. H. Corson Co., which had previous experience in this area. For the same reason, the FHWA also contracted with the Carson Co. for testing constituent materials, developing mix designs, and providing quality control for the production of field mixtures and synthetic aggregate. The data gathered from this experiment are presented in this report under the following subheadings: materials; parking lot paving compositions; synthetic aggregate compositions; performance; and assessment. It was concluded that in order to most efficiently design and use such mixtures, the interrelated roles of lime, fly ash, and sulfate must be studied further. The FHWA is presentely sponsoring research toward this objective." @default.
- W596500519 created "2016-06-24" @default.
- W596500519 creator A5066255246 @default.
- W596500519 date "1973-03-01" @default.
- W596500519 modified "2023-09-26" @default.
- W596500519 title "USE OF WASTE SULFATE ON TRANSPO '72 PARKING LOT" @default.
- W596500519 hasPublicationYear "1973" @default.
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