AASHTO MP 28-17 (2020) PDF Download

AASHTO MP 28-17 (2020) is a standard specification that outlines the requirements for materials used in micro surfacing applications. Micro surfacing is a type of pavement treatment that involves the use of emulsified asphalt, aggregate, mineral filler, water, and additives mixed together in a specialized paving machine, and then applied to the surface of the pavement. The purpose of this standard is to define the quality criteria for the emulsified asphalt, aggregate, mineral filler, and water used in micro surfacing.

This standard specifies the necessary quality requirements that the materials should meet in order to ensure the desired performance and effectiveness of micro surfacing. It provides guidance on the appropriate characteristics, such as viscosity and consistency, of the emulsified asphalt. It also defines the gradation, cleanliness, and durability requirements for the aggregate used in the mixture.

Additionally, AASHTO MP 28-17 (2020) outlines the specifications for the mineral filler and water, including the acceptable particle size distribution and cleanliness levels. The standard also addresses the need for the inclusion of additives in the micro surfacing mixture, specifying the types and proportions that can be used.