Surface Rehabilitation Techniques: State of the Practice Design, Construction andPerformance of Micro-Surfacing

摘要

This document is a comprehensive overview of the terminology, design,construction, application, and performance of micro-surfacing paving technology. This technology consists of polymer-modified asphalt emulsion, 100 percent crushed aggregate, mineral filler, water, and field control additives as needed. Micro-surfacing is primarily used to improve surface friction and to fill wheel ruts. When properly designed and constructed, it has shown good performance for 4 to 7 years. Since micro-surfacing is applied in a thin layer, 10 to 13 mm, its use should be limited to structurally sound pavements. The one unresolved engineering issue concerning this technology is the lack of standard mixture design test procedures. Although the current testing procedures have resulted in micro-surfacing systems that have generally provided good performance, there is a need to validate and standardize the existing test procedures and adjust design standards to better reflect the effect of various materials combinations.