United States Department of Transportation
i
Asphalt surface treatment practice in southeastern United States : [tech summary].
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2014-09-01
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By Ali, Hesham
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Abstract:Pavement preservation is an approach in enhancing pavement performance using a set of practices that extends the life
of the pavement and improves safety and ride quality. According to the World Bank’s Pavement Deterioration Model, the
cost of returning a pavement to good condition after deterioration may be four times the cost of maintaining it in good
condition (Shahin, 2005). The results of a Utah Department of Transportation (UDOT) research study showed that it costs
less to maintain roads in good condition than in poor condition (Zavitski, et al.). According to the National Cooperative
Highway Research Program (NCHRP) Synthesis 223, every dollar spent on preventative maintenance at the correct time in
a pavement’s life cycle saves $3-4 in future rehabilitation costs (Geoff roy, 1996). Later work by Galehouse, Moulthrop, and
Hicks (2003) showed that future rehabilitation cost savings are $6–10 for every $1 spent on preventative maintenance. Some
surface treatments are eff ective for maintaining pavements in good condition. They are applied to the entire surface of the
pavement and are usually used for pavements with no major structural deterioration. The relatively low cost and simplicity of
these techniques, besides their eff ectiveness in extending the life of the pavement and improving performance, has attracted
many agencies into using them. Chip seal, slurry seal, microsurfacing, surface rejuvenation, fog seal, scrub seal, and thin
overlays are among popular surface treatments.
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