ON-Inspector
Member
from what i understood i thought it was just the oposite. the asphalt is better in the buggy because it has the augers to mix it up and prevent segregation.
sitting in the dump truck the heat isn't distrubted evenly.
according to road tec's website the buggy should eleminate the wait time dump trucks spend on site. i can't remember how much they said the buggy holds but they make it sound like each truck should be able to just arrive on site and dump there load almost immediately.
i think whats on roadtec's website makes sense. once the paver starts moving asphalt should always be flowing. so the paver should never be completely full and neither should the buggy. so the trucks should just be able to dump there load upon arrival.
maybe thats in a pefect world though...........
the asphalt in the buggy isn't always being mixed....... it is agitated prior to being fed into the hopper of the spreader, but thats about it. A truck can unload into the shuttle buggy faster than the buggy can unload to the spreaders, not to mention if there are two and he has to re-position. often production is governed by the capacity of the rollers to keep up, not so much how fast the spreaders can lay the asphalt.
the main benefits we use MTV's here are:
1) to prevent end-dump segregation, as the asphalt gets mixed prior to going to the spreader, there isn't a lot of re-heating done in the shuttle buggy, but mixing the hot asphalt with the almost hot asphalt gives you better consistency. most trucks here run with insulated boxes, and run the exhaust out the box as well to keep 'er warm.
2) eliminates trucks backing up to the spreader and bumping the screed which can affect the ride quality
3) allows contractors better production when running more than one spreader on a job and helps to eliminate joints, the shuttle buggy feeds the spreaders a lot easier than trying to squeeze 2 flow-boy's side by side!
Just this weekend we put down 2600 tonnes in one day! 2 Roadtec spreaders and a shuttle buggy, giddy up! They had some tight spots on this job, where the road would narrow from two lanes down to one and a half, using the shuttle buggy allowed the 2 spreaders to continue on and eliminate a joint, there would have been no way to do that with backing trucks up!
sorry for the rant.... i'll post pics of that job soon!