FiberMat® is the ultimate crack inhibiting and sealing membrane; a combination of polymer-modified asphalt emulsion, chopped glass fiber strands and aggregate. This combination creates a robust membrane that absorbs stresses generated in the pavement structure yet ductile and continuous to form a waterproofing barrier against the ingress of water. FiberMat® has two different forms referred to as Type A and Type B. Type A is known best as an enhanced chip seal membrane whereas Type B is known as a SAMI (Stress Absorbing Membrane Interlayer). The tensile strength of FiberMat® has been proven to absorb pavement movements. This layer will effectively flex instead of crack. Tests have concluded that FiberMat® enhances the tensile strength and fatigue performance by 30% and wheel-track cracking rate by 300%. Propagation of cracks is delayed 3-4 fold in laboratory testing versus control specimens and indicators of 10 or more times from field specimens.
Process: A specially developed unit chops glass-fibers in-place and applies them between two layers of polymer modified asphalt emulsion. Fibers are applied at a rate of nominally 2-3 ounces per square yard, dependant on the severity of the cracking. The asphalt emulsion is applied in two simultaneous applications totaling 0.4 to 0.8 gallons per square yard. The final step is the application of an aggregate to create the new surface likened to a rolled chip seal.
Process: The same unit as employed in Type A is used and also applies fiberglass between two layers of polymer-modified asphalt emulsion. The glass fibers in this type are dispersed at a rate of 3 to 4 ounces per square yard. This too depends on the severity of the cracking. The emulsion is again applied in two simultaneous applications totaling 0.3 to 0.5 gallons per square yard. Again, the final step is the application of the aggregate allowing the surface to be opened to traffic prior to the proposed overlay application.