He says that in 2009 he used the PT-PRO to recycle his driveway, and “whatever came up went back down. We documented the project so we could show off the results and I’d say the resulting job was a better binder than a top. She’s holding well although for a finer smooth finish I’d have needed to control the RAP by screening or crushing.”
Plant or Recycler?
Some mobile recyclers also second as a portable asphalt plant, making virgin hot mix on a smaller scale. The U.S. Air Force, working with the National Center for Asphalt Technology, developed and tested the system for airfield repairs. The USAF embraced the technology and is using NiTech Corp.’s system of prepackaged pelletized asphalt along with small skid-steer mounted mixers for greater mobility and PavementGroup’s PT-PRO recycler for larger volume hot mix delivery.
“They (USAF) spent millions testing products and equipment,” Reeves says. “They even constructed a runway then…blew it up...for testing purposes. Our equipment worked well because the PT-PRO produces a homogenous mix of whatever goes in and its size and output capacity make for an ideal fit. The real secret was NiTech’s pelletized asphalt which exceeded the Air Force’s every expectation.”
“We generally load the machine with chunk asphalt that’s been torn up from previous pavings,” McKinney says. “Depending on temperatures, we may have to add up to a gallon of SS1H per ton for better binding. The machine rejuvenates and reheats the asphalt until it comes out as a nice, new, beautiful material. You can’t tell its recycled, and I have zero materials cost.”
When lower transportation costs, the reduced burden of handling waste materials, and the savings in tipping fees at landfills are factored in, MARPs offer significant savings over the cost of hot mix from conventional, fixed-location plants. In fact, the right MARP can pay for itself in the first year or two.
Reeves says that depending on where contractors are located in the U.S. they can pay anywhere from $55 to $125 per ton for virgin HMA; packaged cold patch runs to $600 per ton. “Meanwhile, contractors could be stockpiling their RAP and recycling it for $20 per ton,” Reeves says. “That’s a huge savings. Recycle 50 tons on Monday and you’re talking about saving $1,500 bucks -- a day! We ask our customers, can you afford not to (recycle)?”
McKinney said he is excited about the financial impact his MARP will have on his business.
“I’ve only had this recycler about six months and it’s already saved me nearly $100,000,” McKinney says. “This next year is going to be gangbusters for us.”