ACP Applied Products
Placeholder
Coletanche Fibermat EcoMat Axter Fibermat

STRESS ABSORBING MEMBRANE INTERLAYER

ACP Applied Products installs a Stress Absorbing Membrane Interlayer called FiberMat Type B-a combination of special polymer modified asphalt emulsion, chopped fiberglass strands, and aggregate. This mixture acts as a highly resilient waterproof membrane that seals and effectively delays reflective cracking.

FiberMat Type B differs from Type A in that it is a Stress Absorbing Membrane Interlayer (SAMI). Type B is superior to other treatments as there are no adhesion problems and the membrane cannot gather or tear because it is sprayed in place.

Conventional SAMIs can take a long time to apply, causing significant traffic delays and increased labour costs. ACP Applied Products' quick and efficient application process allows a roadway to be opened following the initial lay-down and prior to asphalt application. The final wearing course can even be applied at a later date.

Why it Works:
Research performed at Nottingham University in the United Kingdom concluded that FiberMat Type B has sufficient tensile strength and flexibility to absorb movements in the pavement structure and can prevent the pavement from cracking.

Where permanent lateral movement of the overlay might occur - due to cracks in the underlying material - FiberMat Type B reduces the magnitude of the resulting strain in the overlay by spreading it over a greater area.

While conventional SAMIs simply relieve stress, FiberMat Type B acts like a cushion - its thickness absorbs stresses, thereby acting as a true stress absorbing membrane.

Application:
A specially developed patented machine drops fiberglass strands in-place between two layers of polymer modified asphalt emulsion. The fiberglass strands are applied at a rate of typically 100 - 140 g/m2 (2.5-4 oz/ square yard), depending on the severity of the cracking.

The asphalt emulsion is applied in two simultaneous streams totaling approximately 1.8 - 2.3l/m2 (0.4-0.5 gallons/SY). This is then followed by the application of a light dressing of 6mm (1/4") size aggregate, which is then compressed into the robust FiberMat surface.