• Friday, December 04th, 2015
01-REJUVENATOR

Reclamite rejuvenator is placed on residential street on pavement in appropriate condition


What:
Spray application (typically 0.04 – 0.10 gal/sq yd) of a diluted maltene-based rejuvenator emulsion, applied by a computerized distributor truck. The rejuvenator restores the components of asphalt lost in the aging process, and is designed to penetrate, flux and co-mingle with the existing asphalt binder. Rejuvenators delay and reverse oxidation, seal micro cracks and associated raveling. Maltene-based rejuvenators may offer a low-cost and effective pavement preservation treatment when applied correctly on pavements in newer condition, or in the mid-to-higher pavement condition index (PCI) range. They’re generally applied by experienced applicators, and manufacturer recommendations must be followed.

Where: Rejuvenating applications should be used on mid-to-higher PCI asphalt pavements that are structurally sound. They also can be effective on aged chip seals, encouraging chip retention by slightly softening the binder and resetting the chip. They are very effective for pavement shoulder preservation. They should not be used on pavements with moderately or severely distressed surfaces, pavements with poor skid resistance or rutting, or roads that cannot be closed or partly closed to traffic during the curing period. Care in the application is required to prevent loss of skid resistance.

02-REJUVENATOR

In-situ rejuvenator in curing process, as it penetrates asphalt surface. Photo credits: Tricor Refining, LLC

Rejuvenating applications may also be used to rejuvenate good quality RAP millings for base placement, or for a final ride surface for lower volume rural, residential or regional road applications. They can be a good choice for this purpose, as they don’t over-asphalt the existing RAP binder, manufacturers say.

Why (advantages): Rejuvenators can be cost-effective, and are easily applied. They reduce raveling, waterproof the surface, rejuvenate and protect surface from UV aging, seal micro cracks before they have a chance to widen, protecting pavement structure from moisture intrusion. They also re-introduce components of asphalt to the asphalt binder. Hairline and micro cracks disappear as the maltene rejuvenator component expands the asphalt droplet as it co-mingles.

Why not (disadvantages): Rejuvenator emulsions, if improperly applied, may initially reduce skid resistance, especially when applied too heavily. Generally they are sanded to reduce friction loss. The lane should be closed to traffic until the seal has completely cured, which can take up to a couple of hours, depending on ambient air temperature and humidity. Cosmetic attributes need to be considered for the specific work, for example, gated residential drives, stamped curbs, driveways, etc.

When: Maltene-based rejuvenators should be placed on asphalt pavements before they show signs of surface distress. A regularly scheduled rejuvenator program every four to seven years– depending upon the road’s surface — will keep a good road in good condition. Rejuvenators must be applied in dry weather, when temperatures are warm enough to ensure a complete cure, generally temperatures of 50 deg F (10 deg C) and rising. This requires consultation with the applicator.

Estimated life extension: Four to seven years on pavements in good condition. Not recommended for pavements in poor condition or low PCIs.

For more information visit http://www.reclamite.com.

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