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FDR is Right Solution for Pennsylvania Township

Pavement Preservation

Cutting Edge Reclamation used a CMI RS-500B Road Reclaimer to uniformly pulverize the existing pavement, subbase material and 2A limestone to a depth of 8 inches. Once the full depth of the existing pavement has been pulverized and blended with an appropriate stabilization additive, the road is re-shaped and compacted to produce a strong, durable base. The compaction process called for continuous monitoring by a trained and certified technician utilizing a nuclear density gauge.

Cutting Edge uses a 10-ton steel drum vibratory roller for the initial knockdown compaction, followed by a 10-ton pneumatic-tire roller and then a steel drum static roller to smooth out the surface in preparation for the new overlay.

Full-depth reclamation (FDR) was used on Old Oakdale Road, a heavily-traveled corridor knifing through the center of South Fayette, PA, for quick reconstruction of the road with minimum disruption to traffic. An operator monitors the application rate of the additive.

The reclaimer/stabilizer has an 8-foot-wide cutting system that pumps the stabilizer emulsion additive from a distributor truck. The emulsion/cement additive used for this project was designed to reduce the potential for raveling and increase the stability of the compacted base by as much as 25 percent.

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Since the existing asphalt pavement structure can be used to create a new subbase, it saves a lot of money, time and disruption for the community, Cannon says. The reclamation process provides significant savings, generally in the neighborhood of 40 percent compared to the conventional HMA mill and fill approach.

The reclamation approach also provides customers with a lot of flexibility in how they can deal with a variety of road and soil conditions.

The chemical additives allow a much wider application in addressing various road and soil challenges, Cannon says. Customers dont have to haul away unstable subgrades and replace them with virgin aggregates. The reclamation/soil stabilization process allows them to add materials that will dry out wet soil and firm up soft soil conditions. Were not a producer or distributor of one type of emulsion stabilizer. We find the right solution to the customers problem. We let the road and soil conditions determine the best solution we need to apply.

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