BridgeGuard Software Proves Successful in Asphalt Overlay Case Study

The bridge deck under study, is a single lane overpass with a lane width of 14' and length of 348'. It has a 2" HMA (hot mix asphalt) overlay on top of a waterproof membrane. With assistance from MDOT technicians, six core samples were obtained based on the BridgeGuard scaled report. The location mapping and findings were precise and provided valuable information towards verifying the deck condition and report output.

Below are some photos of this process and some of the delaminations we identified during our testing. Five of the six delaminations  we cored were within the concrete under the 2" asphalt overlay. The 6th delamination was a disbonding of the overlay. When the core bit was removed, the disbonded asphalt (5' to 6' diameter) lifted with the bit.

Case study bridge deck being scanned at posted speed to collect the data.

Post analysis, BridgeGuard's proprietary software allowed us to locate the delaminations.

Delamination #22 with no visible problems in the asphalt.

MDOT personnel starting the coring process on delamination #22.

Delamination #22 after it has been cored.

BridgeGuard Field Technician evaluating a new IR sensor while on site. BridgeGuard strives to utilize the highest quality sensors on the market.

We have recorded the webinar and it is available on our webisite. Please go to the BridgeGuard home page and click on the webinars link. or click HERE. In the right hand column, you will find instructions showing you how to view the webinars.