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Heatwurx, Inc.  (HWX)
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    Sector  Capital Goods    Industry Construction & Mining Machinery


Heatwurx, Inc.

Business Description

We are an asphalt preservation and repair, equipment company. Our innovative, and eco-friendly hot-in-place recycling process corrects surface distresses within the top three inches of existing pavement by heating the surface material to a temperature between 325° and 375° Fahrenheit with our electrically powered infrared heating equipment, mechanically loosening the heated material with our processor/tiller attachment that is optimized for producing a seamless repair, and mixing in additional recycled asphalt pavement and a binder (asphalt-cement), and then compacting repaired area with a vibrating roller or compactor. We believe our equipment, technology and processes provide savings over other repair processes that can be more labor and equipment intensive.


Many maintenance agencies use the “throw-and-roll” method for patching potholes. It is the most commonly used method because of its high rate of production.

The throw-and-roll method consists of the following steps:

1. Shovel the hot asphalt into a pothole (which may or may not be filled with water or debris).
2. Drive over the asphalt using the truck tires to compact.
3. Move on to the next pothole.

One difference between this method and the traditional throw-and-go method is that some effort is made to compact the patches. Compaction provides a tighter patch for traffic than simply leaving loose material. The extra time to compact the patches (generally one to two additional minutes per patch) will not significantly affect productivity.

This is especially true if the areas to be patched are separated by long distances and most of the time is spent traveling between potholes.

Crack Sealing

Crack sealing is utilized by agencies, parking lot owners and homeowners to seal cracks in asphalt pavement to prevent water and other debris from penetrating the asphalt and causing further damage during the freeze and thaw cycles. This method is preventative and not suitable for repairing or patching potholes.

The process for sealing cracks consists of the following steps:

1. Clean the surface of the area to be sealed and let dry.
2. Heat the sealing material to 300° to 400° Fahrenheit.
3. Pour the heated material into the crack.
4. Let cool and dry.
5. Place a layer of sand over the sealing material to prevent tracking by vehicle tires.

Spray Injection Patching

The spray injection repair technique is performed by spraying heated aggregate (minerals such as sand, gravel, or crushed stone) into the area to be repaired. This repair method requires a truck to haul the replacement asphalt and specialized machinery to heat and disperse.

The spray-injection procedure consists of the following steps:

1. Blow water and debris from the pothole with a high-pressure air blower.
2. Spray a generous layer of binder (asphalt-cement) on the sides and bottom of the pothole.
3. Blow heated aggregate (minerals such as sand, gravel or crushed stone) and asphalt-cement (binder) into the pothole.
4. Cover the patched area with a layer of dry aggregate (minerals).

This procedure process does not include compaction of the repaired area.

Semi-Permanent Repair (Saw cut)

Many agencies employ semi-permanent repair methods such as saw cutting. This method represents an increased level of effort for repairing potholes. This increased effort increases the performance of the repair by improving the underlying and surrounding support provided for the repair. It also raises the cost, due to the increased labor required and the amount of time the repair takes.

The semi-permanent repair method has traditionally been considered one of the best for repairing potholes, short of full-depth removal and replacement. This procedure includes the following steps:

1. Remove water and debris from the pothole.
2. Using a radial saw with a hardened blade, cut the repair area on four sides creating a square or rectangle.
3. Remove the material inside the section that was cut.
4. Shovel hot asphalt into the repair area. Spread with an asphalt rake to proper grade.
5. Compact with a vibrating drum roller or vibrating plate compactor.

This repair procedure results in a tightly compacted repair. However, it requires more workers and equipment and has a lower productivity rate than both the throw-and-roll and the spray-injection procedure.

Intellectual Property

We currently have five issued U.S. patents: four utility patents and one design patent. One additional U.S. patent has been allowed and should issue in April 2015. We have three pending U.S. patent applications and five foreign patent applications.


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