Mirafi® Mirapave Nonwoven Asphalt Overlay Fabric
Product Description
The repair of cracked pavement is a major problem and expense when maintaining roads, parking lots, airfields and other paved surfaces. Cracked pavements allow surface water to permeate to the subgrade soils, which then saturate and weaken the subgrade. Normal maintenance procedure is to repave with an asphalt overlay. This resurfacing procedure can extend the useful life of a pavement section at a lower cost than a full replacement. However, the extended useful service life of an overlay can be reduced by subgrade saturation/weakening which causes fatigue cracking and propagation of cracks from the original pavement through the existing overlay (reflecting cracking). The addition of the correct fabric into a pavement overlay reduces the effect of mechanisms which deteriorate pavements and increases the life of the overlay pavement section.
Mirafi® Mirapave, a needle punched heatset polypropylene nonwoven fabric with high asphalt absorption, is specifically designed for asphalt overlay applications.
Mirafi® Mirapave nonwoven asphalt overlay fabrics provide the key characteristics which have been identified as essential to fabric overlay pavement performance. When installed with a proper surface preparation and tack coat, Mirafi® Mirapave forms an impermeable membrane that prevents the penetration of surface water through the pavement and also provides a stress relieving layer which inhibits reflective crack growth. Mirafi® Mirapave can also be used with chip seal surface treatments to improve the performance of the rehabilitated pavement, when installed with a tack coat between the pavement and the chip seal.
Features and Benefits
When placed with a suitable tack coat between the existing pavement and the asphalt overlay, Mirafi® Mirapave helps extend pavement life by:
- Conformance with AASHTO M288-96 guidelines for paving fabrics
- Providing a waterproof barrier for subgrade foundation soil protection
- Improving the fatigue resistance of the new overlay to traffic loads by providing a stress relieving interface
- Retarding the propagation of an existing crack through the new overlay (reflective cracking)
- Extending the useful life of the overlay
- Strengthening the entire pavement system.
Applications
Mirapave provides a long-term waterproofing layer that extends the pavement
lifecycle in the following applications:
- Highways
- Tennis Courts
- Streets
- Running Tracks
- Parking Lots
- Basketball Courts
- Bridges
- Golf Cart Paths
- Airport Runways
- Playgrounds
Product Description Sheet
Technical Data
Case Studies
Installation Guidelines