United States Department of Transportation
i
Sprinkle Treatment experimental project construction and three year evaluation.
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1989-06-01
[PDF-163.28 KB]
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Abstract:This report documents the construction of a Sprinkle Treatment field trial on a high speed/high volume roadway (55 mph/8520 ADT) and presents the performance data obtained for three years after construction. Normal plant and roadway production rates were maintained during the construction of the 3.1 mile Sprinkle Treatment section. Sprinkle chip spreading was accomplished with a Bristowes Mk V Chip spreader which remained immediately behind the paver throughout laydown operations. The precoated chips were uniformly placed at rates of 7 lb/yd and 10 lb/yd . The only 2 2 problem occurring during construction was related to the densification of the wearing course mix. Less than the 95% specification requirement was achieved.
Performance evaluations were conducted on an annual basis which included Pavement Condition Ratings, structural evaluation, skid resistance, critical hydroplaning speeds, and aggregate retention. In addition, roadway cores were obtained to determine densification due to traffic, roadway gradation and binder content and properties of the asphalt cement including viscosity penetration and ductility. The study demonstrated that both Sprinkle Treatment sections were performing as well as an asphaltic concrete friction course utilized as a control section.
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