Resistance to Reflective Cracking
Resistance to Aging = Longer Life
Higher Binder Application Rates Than Conventional
Chip Seals
Straight-run Rubber-modified Asphalt Binder Rather
Than Weaker Asphalt Emulsion
Higher Percentage of Aggregate Embedment
Higher Percentage of Aggregate Retention
Better Temperature Susceptibility
Stress
Absorbing Membrane (SAM)
Consists
of a sprayed-on application of heated straight-run binder, followed
by a layer of aggregate chips that are precoated with asphalt rubber
binder and seated with a rubber-tired roller
Utilizes asphalt rubber binder with 20% rubber
Greatly reduces the incidence of reflective cracking
Stress
Absorbing Membrane Interlayer (SAMI)
Consists
of a SAM with a surface course of either rubberized or conventional
hot mix asphalt
Also utilizes asphalt rubber binder with 20% rubber
Is used instead of SAM on high-traffic roads or when extra structural
pavement capacity is needed