Performance of polymer modified hot mix asphalt pavements : an extended evaluation.

787863509Final report.PDFTech ReportFHWA/MS-DOT-RD-04- 141MS-DOT-RD-04-141Asphalt pavementsAdditivesAsphalt additivesPolymersBindersEvaluationMississippiMississippi. Dept. of TransportationBattey, Randy L.Mississippi. Dept. of Transportation. Research DivisionUnited States. Federal Highway AdministrationNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceUS Transportation CollectionIn the summer of 1996, the Mississippi Department of Transportation (MDOT) initiated a field trial (MDOTState Study No. 111) and a laboratory study (MDOT State Study No. 123) to evaluate the use of polymermodified asphalts in hot mix asphalt pavements. In the field trial, nine experimental sections were compared.Eight of the sections contain different polymer modification, including four styrene-butadiene copolymers,one polyethylene, two crumb rubbers, and a gelled asphalt. A ninth section containing no modifiers serves asthe control section for the experiment. This experiment was constructed on a section of Interstate 55Northbound near Grenada, Ms. that is subjected to approximately one million Equivalent Single AxleLoadings (ESALs) per year. Each section is one half mile in length and is separated from the next section bya one half mile long non-modified section.Contained within this report is the summary of activities related to MS State Study No. 141, which examinesthe long-term performance of the nine sections. As part of State Study No. 141, an effort has been made tocharacterize the performance of each of the sections by utilizing MDOT\ue2\u20ac\u2122s Pavement Condition Rating (PCR)which was developed in conjunction with MDOT\ue2\u20ac\u2122s Pavement Management System