TDOT Region 2 awarded the SR-111 micro surfacing job to Hudson Construction, a contractor Ergon has supplied on previous projects. Hudson typically paves with their in-house conventional micro surfacing product in this region. However, Ergon’s Mark Clark had been in talks with Hudson District Supervisor Todd Nance for a while about the use and benefits of eFlex; Mark was confident eFlex would be a better solution to address distresses on SR-111 while providing enhanced durability and resistance to heavy traffic loads long term. Convinced of the power of eFlex, Todd/Hudson was on board with giving high-performance micro surfacing a shot.
With Hudson’s support, Ergon’s Matt Jeffers, who worked closely with Mark Clark on this project, visited with representatives from TDOT, providing the necessary information to convince them to green-light the eFlex replacement, assuring a good ROI over time.
TDOT officials were familiar with the benefits of micro surfacing, but agreed the long-term performance challenges would be better addressed by using a highly polymerized micro surfacing system over the conventional options.
At the start of the preservation process, a test strip of eFlex was applied to a turning lane and approved by TDOT inspectors. With surface temperatures at 101°F, Hudson Construction started applying eFlex at 22 pounds per square yard at the Putnam/Overton county line. They continued northbound into Overton County. The project also included an application of .10 gallons per square yard of high-performance fog seal on the shoulders. Work was completed in three days, and the eFlex application provided a smooth and dark appearance similar to that of conventional hot mix, which met TDOT’s expectation. “The constructability and appearance of eFlex were very impressive,” commented Nance.
Durability for the Long Haul
When appropriately practiced, pavement preservation follows a simple but effective maxim: “the right treatment, for the right road, at the right time.” That equation is what made eFlex the right choice for SR-111. Its increased polymer content allows eFlex to withstand a lot of punishment, including stressors caused by repeat loads from heavy traffic. TDOT can expect the eFlex treatment to extend the life of SR-111 by another eight to 10 years at one-third of the cost of hot mix asphalt (according to the industry average).