Used for three decades to enhance asphalt pavement performance, polymer modified asphalt binder (PMA) offers superior performance benefits that every pavement owner desires.
The Pavement Economics Committee-funded report Use of RAP & RAS in High Binder Replacement Asphalt Mixtures: A Synthesis is complete and published as NAPA Special Report 213. The report includes a historical overview of the use of RAP and RAS, environmental and economic benefits, design and production considerations, and field performance information.
Reflective pavements are promoted as a tool for mitigating the urban heat island effect (UHI), but the science to support such claims is lacking. Most of the research backing such claims deals with rooftops, not pavements, and the effects and value of reflective surfaces are different when they are below our feet instead of well above our heads. This factsheet explores the issue.
Reflective pavements are promoted as a tool for mitigating the urban heat island effect (UHI), but the science to support such claims is lacking. Most of the research backing such claims deals with rooftops, not pavements, and the effects and value of reflective surfaces are different when they are below our feet instead of well above our heads. This technical factsheet explores the issue and highlights what the pavement-focused research on albedo modification has found.
The use of reclaimed asphalt pavement (RAP) in new asphalt mixtures has obvious advantages to the environment, pavement owners, and contractors.
Although cold weather is not ideal for placing and compacting Hot Mix Asphalt (HMA), field experience confirms that it can be accomplished under adverse conditions. This publication provides guidelines on the key aspects in cold weather. Among the factors discussed are mix characteristics, base conditions, transportation, types of rollers, handwork, joint construction, and specifications and guidelines for cold weather compaction.