Polymer network formation in the pavement using SBR latex modified asphalt emulsions

摘要

SBR latex particles in the polymer modified emulsion remain in the aqueous phase and spontaneously transform into a continuous microscopic polymer film surrounding asphalt particles upon curing. In the microsurfacing mix, honeycomb structures of flexible Portland cement-polymer complex are present among aggregates and within entire pavement. The latex film formation provides early strength development and rut filling capability. The honeycombs made only with Portland cement would be very brittle and this is the case when the polymer is present in the asphalt phase. Only 3% SBR latex in the asphalt is needed to provide excellent improvement in the rutting resistance, demonstrating advantages of fine polymer networks in the asphalt.