Laboratory Study of Slurry Seal Coats, HR-185, Revised, 1978

(1978) Laboratory Study of Slurry Seal Coats, HR-185, Revised, 1978. Transportation, Department of


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Extensive programmed laboratory tests involving some 400 asphalt emulsion slurry seals (AESS) were conducted. Thirteen aggregates including nine Iowa sources, a quartzite, a synthetic aggregate (Haydite), a limestone stone from Nebraska, and a Chat aggregate from Kansas were tested in combination with four emulsions and two mineral fillers, resulting in a total of 40 material combinations. A number of meetings were held with the Iowa DOT engineers and 12 state highway departments that have had successful slurry seal experiences and records, and several slurry seal contractors and material and equipment suppliers were contacted. Asphalt emulsion slurry seal development, uses, characteristics, tests, and design methods were thoroughly reviewed in conjunction with Iowa's experiences through these meetings and discussions and through a literature search (covering some 140 articles and 12 state highway department specifications). It was found that, while asphalt emulsion slurry seals (when properly designed and constructed) can economically improve the quality and extend the life of existing pavement surface, experiences with them had been mixed due to the many material, slurry, and construction variables that affect their design, construction, and performance. The report discusses those variables identified during the course of the project and makes recommendations concerning design procedures, design criteria, specifications and the means of evaluating them.

Item Type: Departmental Report
Keywords: Construction, Design, Easements, Laboratory studies, Materials, Performance, Recommendations, Slurry seals, Specifications, Variables
Subjects: Transportation > Pavements
Transportation > Materials
Transportation > Roads and highways
Transportation > Research
Transportation > Design and Construction
ID Code: 16601
Deposited By: Iowa DOT Library
Deposited On: 24 Apr 2014 11:43
Last Modified: 21 May 2015 18:00