Evaluation of Micro-Surfacing Mixture Design Procedures and the Effects of Material Variation on the Test Responses (1289-1)

This study examined the repeatability of the International Slurry Surfacing Association (ISSA) mixture design tests by evaluating the variability of the test results obtained. Consistencies between material combinations and within a given material formulation were evaluated. The repeatability of the tests using materials falling within current micro-surfacing specifications was obtained. Material compositions were varied, and the responses for the various tests were examined to identify any definite trends. This process revealed more about the behavior of materials used in typical micro-surfacing mixtures. The establishment of the repeatability of these tests and the observation of the impact of material variation is an initial investigation that provides a foundation for future micro-surfacing research.