Asphalt Rubber Technology Service
| The
Rubberized Asphalt Process |
Collected |
Ground |
 |
 |
Scrap
tires are collected by tire processors. |
The
tires are ground and all metals and fibers are removed. |
Bagged |
Labeled |
 |
 |
The
crumb rubber is packaged in 2,000-lb. supersacks and shipped to
the contractor's asphalt plant. |
Each
supersack is labeled with its exact weight and other pertinent information. |
Lab
Blending |
Mix
Design |
 |
 |
Rubber-modified
liquid asphalt binder is made for the mix design in the lab by blending
crumb rubber with unmodified binder. |
The
mix design is performed by ARTS staff
using SCDOT Superpave Mix Design procedures. |
Hot
Mix Asphalt Plant |
Blending
Unit |
 |
 |
Little
or no modifications are required at the contractor's asphalt plant. |
The
blending unit is utilized to make rubber-modified asphalt binder
at the asphalt plant. |
Pumping |
Dumping |
 |
 |
The
blending unit is connected to a tanker that pumps unmodified liquid
asphalt binder into the blender. |
Rubber
is added to the liquid asphalt binder. |
Blending |
Viscosity
Testing |
 |
 |
Rubber-modified
liquid asphalt is blended and pumped into the hot mix asphalt plant.
The entire process takes about 45 minutes and makes approximately
6,500 gallons of rubber modified asphalt binder per batch. |
ARTS
staff performs quality control viscosity testing on the rubber-modified
liquid asphalt at the hot mix asphalt plant during production. |
Testing
Hot Mix Asphalt |
Paving |
 |
 |
The
contractor's lab technician performs quality control testing using
SCDOT procedures on the rubber-modified hot mix asphalt at the plant
during production. |
Rubber-modified
hot mix asphalt is placed on the road using standard paving equipment. |
Compaction |
Finished
Pavement |
 |
 |
Steel
wheel rollers are recommended, but rubber tired rollers may be used
for finish rolling. |
Rubberized
Asphalt Pavement is generally more durable than conventional asphalt
pavement. |
2002 HUGO DRIVE • CLEMSON UNIVERSITY • CLEMSON, SC 29634
PHONE: (864) 656-6799 • FAX: (864) 656-6186 • EMAIL: arts@ces.clemson.edu