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LEADS TO COST EFFECTIVE PAVEMENT REHABILITATION Synopses for 1st International Conference World of Pavements Sydney, Australia, February 20-24, 2000 G. Holleran, Vice President, Valley Slurry Seal Company, USA Jack Van Kirk, Director Of Asphalt Technology, Basic Resources Inc., USA Back to VSS Technology Papers Library |
| Between 1980 and 1992 California Department of Transportation
(Caltrans) conducted research comparing asphalt rubber (AR) concrete
to conventional asphalt concrete (AC) in field evaluations. During
this time cities and counties in California also experimented with
AR pavements. It was determined through these field evaluations that
the AR pavements could be significantly reduced in thickness and provide
the same service life as thicker conventional AC pavements. This led to
the development of the Reduced Thickness Design Guidelines by Caltrans
for AR pavements. The reduced thickness approach (up to 50%) was
substantiated by research in South Africa (1994) in field installations
using the Heavy Vehicle Simulator (HVS), by the University of California,
Berkeley (1994) in the laboratory and by the University of Alaska,
Fairbanks (1995) in the laboratory. In 1999 research was conducted
to determine the cost-effectiveness of rehabilitation and maintenance
strategies using AR pavements. It was determined that AR rehabilitation
and maintenance strategies are more cost-effective when compared to
conventional asphalt strategies. This has led to more wide spread usage
of AR rehabilitation and maintenance strategies in California and other
states in the USA. |
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Back to VSS Technology Papers Library Copyright © 2000 Valley Slurry Seal Co All Rights Reserved. |