An eight-mile stretch of roadway required restoration and resurfacing due to excessive wear and reflective cracking. The road, US 64 in Nash County, North Carolina (Division 4), was originally a concrete road that had received numerous repairs with asphalt overlays. Bobby Liverman, County Maintenance Engineer for Nash County, oversaw the restoration project and researched options for pavement preservation, knowing that traditional asphalt resurfacing would only lead to more reflective cracking within a year.
Liverman identified FiberMat® as a viable crack-inhibiting membrane technology to extend the life of the road, significantly delay cracking and save taxpayers money. To help with the decision, Liverman referenced a demonstration project conducted four years prior by Hammaker East in nearby New Hill, NC. This original road was also concrete and over time, the FiberMat roadway saw little cracking, while the non-FiberMat roadway saw reflective cracking after the first winter. According to Liverman, the test results confirmed his decision to proceed.
Hammaker East applied the FiberMat Type B, SAMI (Stress Absorbing Membrane
Interlayer) system that serves as an intermediate layer between the existing pavement and a new wearing course overlay. Additionally, the US 64 project included testing an approximate two-mile stretch of unmilled roadway treated with FiberMat. “FiberMat is a great alternative to traditional resurfacing methods, especially when the original roadway is concrete,” said Sid Witmer, director of sales and marketing for Hammaker East. “Essentially, FiberMat creates a bonding membrane of layers of oil, chopped glass fibers and stone, which is applied to the cracks. Then, we add a hot mix overlay creating a fiber barrier that prevents reflective cracks from returning,” explains Witmer. The application is quick and provides traffic-ready roads within 30 minutes.
According to Matt Johnson, president of Russell Standard/Hammaker East, traditional road resurfacing methods can exhibit cracking within 12-24 months, and incur frequent maintenance costs for counties and municipalities. “FiberMat is a preservation product that delays cracking for years. This eliminates the cost of remobilizing road construction crews and the investment of more materials for at least one to three subsequent repair applications. Using FiberMat ultimately delivers a long-term cost savings.”
A combination of polymer-modified asphalt emulsions, proprietary fiber strands and aggregate, FiberMat creates a surface membrane that extends the life of a road.
• Bonds well to concrete and asphalt
• Absorbs traffic stresses in the pavement structure
• Forms a waterproofing barrier that impedes the ingress of water into a road
• Reduces, repairs and resists reflective surface cracking
• Increases tensile strength and flexibility of the road surface