Production

Photos courtesy Tom Kuennen New asphalt paver, compactors and cold mills from Wirtgen Group are the centerpieces of the expansion for Pave-Tar Construction Ltd., Etobicoke, Ontario, into pavement reconstruction. For over four decades, Pave-Tar and a predecessor firm have provided services such as grading, curb and sidewalk construction, sewer and water construction, snow removal, and […]

With 1,500 landings annually, Polk Army Airfield, located in Fort Polk, Louisiana, handles some heavy traffic. U.S. Army transport planes moving troops in and out of the base take their toll on the runway, which needed to be resurfaced after only five years. Tarver Land Development, Alexandria, Louisiana, which also does pipeline and civil work […]

  Heat is a constant concern in our industry. But we’re usually concerned with retaining it, as we deliver and lay a perishable material under tight timelines. Even in paving, there is such a thing as too hot. As temperatures across the country hit the high 90s—and, in some places, well into the triple digits—it’s […]

Long-life or perpetual pavements are designed and built to last longer than 50 years, requiring only a periodic mill and inlay of the surface layer. The pavement structure is designed using appropriate materials and layer thicknesses to prevent structural distresses that begin at the bottom of the pavement structure, such as bottom-up fatigue cracking and […]

The TRI-MIX warm-mix injection system from Tarmac International Inc., Lee’s Summit, Mo., is designed for dual use—the producer can set it up for water or chemical injection to create foamed liquid asphalt cement (AC) at lower production temperatures than hot-mix asphalt. Here’s how it works. First, the operator sets the percentage of injected liquid into […]

The Accu-Shear® from Stansteel/Hotmix Parts, Louisville, Ky., is designed for advanced in-line water foaming of liquid asphalt cement (AC). The shearing process promotes total blending and homogenized flow for warm-mix asphalt (WMA) production. The Accu-Shear is also engineered for in-line blending of rejuvenators, latex, emulsions and most liquid chemicals on the market today with the […]

The AquaFoam® warm mix system from Reliable Asphalt Products, Shelbyville, Ky., is designed to foam liquid asphalt cement (AC) binder with water to create a foamed warm-mix asphalt (WMA) product. Here’s how it works. First, a technician fits the AquaFoam components in line at the HMA plant. The 3-inch jacketed injector goes directly into the […]