GSB® Performance Stands the Test of Time!

This 2003 e-mail about GSB® performance, written by an industry expert, is just as relevant today as it was then!

From: Peter Sebaaly

Sent: 1/ 22/2003

To: Dan Gee

Subject: Preventive Maintenance

Dan,

…for your meeting with the Iowa Highway Research Board.

The first thing you want to do is to educate those in charge that preventive maintenance is the best way to keep up with their pavement system. Preventive maintenance means that you do something to the pavement before you start seeing the distresses on the pavement surface. National data has shown that every $1.00 spent on preventive maintenance is equivalent to $5.00 spent after the pavement starts showing surface distresses.

GSB-88® has shown effectiveness in slowing down the aging of the asphalt binder. As the pavement gets older, the asphalt binder ages and becomes more brittle and more susceptible to cracking due to traffic loads and environmental actions. By applying the GSB® sealer, aging of the binder is slowed down and the potential for cracking is greatly reduced.

Also, on city streets and county roads, officials maybe concerned about the skid resistance of the pavement and they may not want to seal it because they are afraid of losing the skid resistance. Recent studies have shown that the GSB-88® is very effective in holding down the sand particles which maintains good skid resistance after sealing (a road study in Ohio and a lab study by the Army Corps of engineers).

In the case of a research project, you should emphasize that a pavement should be in good condition to be a candidate for preventive maintenance. Also, a control section can be placed which will compare the performance of the GSB-88®. There are also lab and field tests which we normally use to compare product performance. Conduction surveys and skid resistance are two field tests that can be used to compare performance data. Field samples can be obtained annually and the properties of the extracted asphalt binder can be compared to measure the aging process.

I hope this will help you in your discussions with the Iowa Highway Research Board. Let me know if you need additional help.

Dr. Peter Sebaaly, Professor

Director of Western Region Superpave Center

Civil Engineering Department

University of Nevada, Reno

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