Asphalt Rubber Technology Service
 



 




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Advantages of SAM & SAMI

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
 
 
 
 
 
 
 
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2002 HUGO DRIVE • CLEMSON UNIVERSITY • CLEMSON, SC 29634
PHONE: (864) 656-6799 • FAX: (864) 656-6186 • EMAIL: arts@ces.clemson.edu