VOL 22 ISSUE #1
 
The Roadtec MTV-1100e is the newest and most advanced material transfer vehicle on the market.
 

Look up milestone and see there are two definitions: a large roadside stone indicating a mile traveled and, an action or event marking a significant change or stage in development. In the modern history of roadbuilding, there have been two milestones, which have significantly affected the quality of roads, runways, and parking lots being built. 

In 1935, Harry Barber introduced the very first asphalt paver, which dramatically changed how roads, runways, and parking lots would be built. Paving technology would evolve and improve over the years, but the roots of modern-day paving go back to Barber’s innovation. 

The second milestone occurred some 50-plus years later in 1989, when the very first material transfer vehicle (MTV) was introduced by Roadtec. Material transfer technology has dramatically changed the quality of paving by directly addressing issues of hot-mix asphalt (HMA) degradation occurring during material transport and during the paving process. In the asphalt paving industry, the MTV is fast becoming an essential tool for achieving the critical smooth finished paved surface expected today.

PROVEN PRODUCTIVE

The Roadtec MTV-1100e is a low-profile machine.
The Roadtec MTV-1100e is a low-profile machine which keeps the operator closer to the ground, giving a better view of the surroundings and the ability to talk with ground crew.

The MTV has proven its value and now occupies its own equipment category. Many paving contractors consider the material transfer vehicle to be a vital piece in the paving production chain.

The newest and most advanced material transfer vehicle on the market is the new Roadtec MTV-1100e. The new machine has been designed completely from the ground up. Roadtec engineers used their 25-plus years of experience developing MTVs combined with customer feedback, which included customer lists of “must-haves,” based on their direct paving experiences. 

“We used the new MTV-1100e in conjunction with our Roadtec RP-190e rubber-tired paver on a 6-mi (9.65 km) stretch of an I-20 rehab project located at the Georgia-Alabama border and it worked fantastic … and it was comfortable to operate,” said Scott Hall, operations trainer with MidSouth Paving, an Oldcastle Company, Birmingham, Alabama. “The machine was instrumental in our productivity on this road job.” 

DESIGNED FOR BETTER VIEW

The 47,890-lb (21,722 kg) machine is robust. Powered by a 250 hp Cummins QSB 6.7 T4F engine, the MTV-1100e features a dump hopper with 22-in (53 cm) triple-pitch segmented auger and offers a 500 TPH (453 MTPH) capacity.

“I like the fact that the new machine design focuses on the operator and crew,” Hall said. “It’s a low-profile machine which keeps the operator closer to the ground, giving a better view of the surroundings and the ability to talk with ground crew. Roadtec also smartly built in a dual staircase that allows my guys to easily cross the paving train without risk of being between machines. Worker safety is always a priority.” 

The 24 ton (21.7 tonne) Roadtec MTV-1100e is an extension of the company’s material transfer vehicle offering and is not intended to replace either of the well-proven Shuttle Buggy® models. There are distinct design differences between the Roadtec Shuttle Buggy and MTV-1100e material transfer technologies. Contents of the Shuttle Buggy MTV’s storage bin are constantly mixed by the triple-pitch auger located in the bottom of the bin. The mixing action equalizes temperatures and evenly mixes large and small particles. A slat conveyor runs from the bottom of the bin and feeds the paver. Heat sink characteristics of the storage bin further help combat temperature segregation. 

CONTINUOUS PAVING

The MTV-1100e material transfer design is different. The machine features an exclusive offset gravity transfer to assure homogenous mix. The MTV-1100e uses the transition between the truck unloading and the paver loading conveyors as a remixing point. Larger aggregate that may have rolled to the sides of the conveyor, as well as cool spots in the material, are redistributed throughout the mix. 

“Our goal is continuous paving, so the MTV-1100e allows us to keep the paver moving,” Hall said. “Not only does it make sense from a productivity standpoint, but it improves the quality of the mat. Whenever the paver stops, the screed has a chance to settle. The head of mix cools, creating a bump in the mat when you get moving again. And, whenever a truck backs up to unload into a stopped paver, there can be another bump—all that shows up in the smoothness readings.” 

MAKING ROADBUILDING BETTER

Clearly, the inventions of the asphalt paver and material transfer vehicle have changed roadbuilding forever … and for the better. It probably is too soon to roll a large stone out to the side of the roadbuilding road of progress to mark the Roadtec MTV-1100e as a milestone … but time will tell.

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