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Harding Asphalt
What is an Infrared Ray?
According to Webster’s New World Dictionary infrared rays are: “rays of light that are just beyond red in the spectrum.” They cannot be seen but they produce heat deep inside an object.” It is not the maximum amount of B.T.U.’s generated that is important but the maximum amount of infrared rays produced with the minimum amount of heat being generated. 

The Infrared Repair Process
Premixed gas and air are delivered under pressure to energy converters; at which point the infrared rays are created. The materials used in the converters combined with specific engineering procedures generate the maximum amount of rays with minimum convection heat produced. The rays are then channeled to the desired location through a series of reflective panels. Producing heat deep within an object is the reason that allows deep penetration asphalt repair and re-claiming without causing burning, scaling, or separation of the asphalt from the aggregate. Also, the Infrared process does not change the inherent characteristics of the asphalt.

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Infrared Patching Versus Conventional Patching
Conventional Infared
Cut out area to be repaired. Not Required
Dig out old material. Not Required
Load and haul away old material. Not Required
Sweep away loose soil and/or standing water. Same
Position Infrared panel over area.
Allow infrared to penetrate for 5 to 9 minutes depending on depth, season and aggregate.
Prepare surface areas and apply tack coat to cold edges. Not Required
Replace old material with new mix. Add material, if necessary to meet grade.
Lute (rake) to correct grade. Same
Estimated Time for Process Estimated Time for Process
2 Hours 20 Minutes

As you can see by the comparison, some of the repair steps are the same. However, when repairing utilizing infrared, you are constantly working 8 to 10 inches inside of the heated softened area. This means that the repair area and the surrounding area are being worked together at the same temperatures. This eliminates cold joints or seams, and creates an area that is thermally bonded to the existing pavement. No point of weakness!

The significant time differences between Infrared and Conventional patching allow Infrared repairs to be made to business premises during business hours with little or no disruption to the flow of traffic.

Click here to see Applications for Infrared Usage