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Since concrete slipform paving began, there has been a need for mechanical Dowel Bar Inserters (DBI) to eliminate the costs and inconveniences associated with dowel supporting baskets which must be secured to the subgrade ahead of the paving operation. The DBI eliminates the need for the supporting baskets, allows concrete to be dumped on grade in front of the paver and eliminates the extra manpower to handle and install the dowel baskets. The position of the dowels inserted with the DBI are as good or better than those supported on baskets.
G&Z and its associates pioneered DBI technology starting in the late 1970s. G&Z’s 1st Generation DBI Technology required long bolster extensions be added to a standard slipform paver frame to accommodate a DBI and the following Oscillating Correcting Beam (OCB). A large crane was required for assembling and dismantling the non-modular paver and DBI for transport. High mobilization costs limited the DBI’s economic attractiveness to only large mainline concrete paving projects.
When developing G&Z’s 2nd Generation Dowel Bar Inserter, G&Z focused on making successful DBI
technology even better. G&Z’s goal was to improve the DBI design so DBI technology would be economical
to use on smaller projects. G&Z’s Compact DBI Technology resulted in offering advantages
and improvements over the 1st Generation DBI.
The patented CDBI structure is now a single, self-supporting module designed to speed assembly, disassembly
and width changes. The optional CDBI self-loading kit eliminates the need for a crane to add / remove the CDBI
from the paver or load / unload a trailer. These tasks now take a few hours instead of days!
The CDBI quickly mounts on the rear of a standard G&Z Four-Track Slipform Paver with only minimal modification
and in many cases does not require long bolster extensions even on high production paving operations. This patented feature
allows conversion back and forth between DBI and non-DBI paving in a matter of hours.
The patented CDBI Dowel Distributing / Chain Feeder System reduces the feeding system profile and greatly
improves the feeding system’s speed and reliability as compared to the old dowel distributing cart system.
CLICK HERE TO SEE THE CDBI FEATURES GALLERY
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