The MIT-SCAN2-BT Dowel Bar Alignment & Positioning Test from MIT Mess- und Prüftechnik GmbH is a measuring system for the non-destructive and accurate measurement of dowel positions and dowel bar alignment in concrete pavements. To find out more, Contact Us.

The measuring systems MIT-SCAN2-BT utilize the pulse induction method, which allows the fast measurement and an exact analysis. Measuring and analysing the dowel bar positions of one joint can be done in just one minute. This enables the user to test hundreds of joints per day. Under normal conditions, depths as well as horizontal and vertical misalignments can be determined with an accuracy of 4 mm and side shifts with an accuracy of 8 mm.

Measuring system for the non-destructive and accurate measurement of dowel positions and dowel bar alignment in concrete pavements

Joints in concrete pavements of highways, airport runways and container areas are exposed to stresses and strains due to traffic and temperature variation. Steel dowel bars, reinforcement bars and tiebars are built into joints, to support the transfer of loads across the joints and to maintain the elevation of adjacent slabs at the joints. The type and the number of dowels and tiebars as well as their accurate positions and tolerable displacements are accurately determined, to ensure the long-term performance of the joints.

Since 2001, a new standard for the non-destructive measurement of dowel bars has been achieved. The MIT-SCAN2-BT consists of a compact rail-guided measuring device, an easily assembled GRP (robust glass fiber reinforced plastic) rail system and a Pocket PC. The Pocket PC communicates with the measuring device via a Bluetooth connection.

The MIT-SCAN2-BT was developed specifically for the evaluation of dowel bar alignment in concrete highways. The pulse induction method utilizes the magnetic properties of dowel bars to create a magnetic field. The resulting field -created by the metal bars- is recorded by a sensor field. The emission unit as well as the sensor field are placed inside a measuring carriage, which is pulled on a rail along the joint of a highway. The control of the measurement, the recording and the analysis of data are done by a Pocket PC, which communicates via Bluetooth connection with the measuring carriage. A more detailed analysis of the data can be done by the software MagnoProof on a desktop PC in the lab.