An Investigation of Emulsion Stabilized Limestone Screenings, HR-309, 1989

(1989) An Investigation of Emulsion Stabilized Limestone Screenings, HR-309, 1989. Transportation, Department of

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Abstract

During the processing of limestone to produce commercial aggregates, a significant amount of waste limestone screenings is produced. This waste material cannot be used in highway construction because it does not meet current highway specifications. The purpose of this research was to determine if a waste limestone screenings/emulsion mix could be used to construct a base capable of supporting local traffic. A 1.27 mile section of roadway in Linn County was selected for this research. The road was divided into seven sections. Six of the sections were used to test 4" and 6" compacted base thicknesses containing 2.5%, 3.5%, and 4.5% residual asphalt contents. The seventh section was a control section containing untreated waste limestone screenings.

Item Type: Departmental Report
Keywords: Asphalt content, Base course (Pavements), Emulsions, Limestone aggregates, Performance evaluations, Screenings, Test sections, Thickness
Subjects: Transportation > Pavements
Transportation
Transportation > Materials
Transportation > Materials > Gravel and aggregates
Transportation > Roads and highways
Transportation > Design and Construction
ID Code: 21792
Deposited By: Iowa DOT Library
Deposited On: 17 Mar 2016 15:47
Last Modified: 17 Mar 2016 15:47
URI: http://publications.iowa.gov/id/eprint/21792