Concrete Pavement Technology Program Best Practices for Dowel Placement Tolerances

  • Date: January 2007
  • Year: 2007

Related Resources

ACPA Dowel Bar Alignment Guide Specification – Jan 2014

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Date: 7 January 2013

MIT-DOWEL-SCAN Tie Bar and Dowel Bar Alignment & Positioning for Concrete Pavements Brochure

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EVALUATION OF THE MIT SCAN2-BT ON MN DOT’S 15 INCH LONG DOWELS

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Date: June 2009

Developed by Magnetic Imaging Tools GmbH (Dresden, Germany), the MIT Scan‐2 is a nondestructive testing device that uses magnetic imaging technology to measure the position of metal dowel bars embedded in concrete. It is very quick and easy to use. Less than five minutes are needed to scan each joint and reposition the device for the next joint.

The hand held computer that controls the device allows the user to see the positions of the dowel bars in the joints immediately after scanning. It also has a very easy to use analysis program called MagnoProof that uses the specified dowel locations, along with allowable tolerances, to automatically identify misaligned dowels.