Development and Application of a Microsurfacing Mix Design Method to Assess the Influence of the Emulsion Type

Microsurfacing asphalt mixtures are a preventive maintenance technology comprising the application of slurry (produced with modified emulsion), aggregate, filler, and water on top an existing pavement at ambient temperature. Although it is widely used technology, further studies mix design procedures necessary to ensure adequate composition. Thus, this study contributes developing improved procedure for microsurfacing mixtures. Different were prepared, influence type amount emulsion added filler (cement) characteristics mixture evaluated. Two preliminary tests, referred as “pizza test” “ball test”, proposed determine initial proportions cement in mixture, respectively. Then, consistency, cohesion, shaking abrasion tests performed optimum content each component evaluate their characteristics. The results showed that these essential optimize composition, even though was found microsurfacings complex task because system chemical interactions strongly influenced by its