Engineered Paving Products Deliver Longer Pavement Life and Improved Function
Pavement deterioration begins the moment the asphalt paver pulls away from paving a road, parking lot, or other area of critical transportation infrastructure. The enemies of pavement integrity never rest. Age, oxidation, traffic, and climate are constantly working to undermine the condition of the asphalt pavement that make our roads smooth, reducing them to crack and pot-hole filled obstacle courses in seemingly no-time. Water penetration, and the cumulative effect of continual use by heavy vehicles, work incessantly to undermine the integrity of the asphalt paving that is the foundation of our modern transportation system. Eventually all pavements deteriorate to the point where a remedial pavement overlay is required to extend the service life of the roadway. Unfortunately, many times freshly laid asphalt overlays quickly begin to crack due stresses from the cracks in the old underlying pavement.
Today’s state of the art engineered paving fabrics, composites and geogrids have been specifically designed to counter these influences, and extend the life of asphalt pavement overlay applications. These developments in asphalt pavement overlay technology have resulted in significant and measurable outcomes that are transforming roads and paved surfaces everywhere into more durable, longer lasting systems that stand-up to the forces working against them. The technology underlying the battle to resist the forces which lead to asphalt deterioration has developed powerful effective tools that now work to dramatically enhance the performance and design life of our transportation infrastructure. Geosynthetic products now deliver a level of longer life, and improved function that could only be dreamt of a few short years ago. Geosynthetic pavement overlay products can dramatically reduce long-term maintenance costs by extending the service life of new asphalt overlays. The bottom line is that asphalt pavement overlays that include these products offer state-of-the-art transportation construction components that deliver significantly improved operations.
Nonwoven geotextiles have been used as paving fabric for quite some time. Typically produced with 4 – 7 oz. nonwoven geotextile, paving fabrics are a little different in that one side of the geotextile is heat-set. This heat treatment of the geotextile allows for the fabric to become a waterproofing barrier in an asphalt overlay. When liquid asphalt cement is applied to the existing surface with the paving fabric on top, a waterproofing layer is formed when the hot mix asphalt is applied over the fabric and the liquid asphalt beneath the is drawn up, into and through the fabric. This process also creates the bond between the old pavement and the new layers of geosynthetic material and hot mix asphalt overlay.
TruPave fiberglass paving mat is manufactured using a non-woven, randomly dispersed fiberglass and polyester construction process that delivers 360-degree tensile strength reinforcement which works to counter the reflective cracking that tends to occur in all directions. This hybrid fiberglass & polyester composition also creates a moisture inhibitor when saturated in asphalt cement, which provides an effective barrier to the water intrusion that has plagued the earlier pavement structure. TruPave is a great value for the cost. The added tensile strength due to the fiberglass makes the performance of the product much greater than that of the standard paving fabric, yet is only a fraction more in cost.
These products are used for moisture barrier and reflective crack control specifically on isolated joints. Paving geocomposites typically consist of a geotextile fabric bonded to an asphalt mastic layer. They come in 12″ – 48″ wide rolls, and usually have a “peel n’ stick” system that allows for placement of the product without the need for additional liquid asphalt cement. Paving geocomposites are used extensively on transverse and longitudinal cracks where the cracks are not random yet isolated and relatively straight (i.e. concrete saw joints).
Maximum tensile stength is provided to an asphalt overlay by incorporating Paving Geogrids. These products can also come bound to a paving fabric to provide both moisture barrier and maximum reflective crack control. You can use paving geogrids for isolated joints and/or full coverage applications because they are available in larger width rolls. Although they can be expensive, they will pay for themselves by stopping even the most stubborn cracks.